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Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Tropical Convective Variability as 1/f Noise  

Science Conference Proceedings (OSTI)

Evidence is presented that the tropical convective variability behaves as 1/f noise for a 1–30-day period. This behavior is shown by analyzing the time series of convective available potential energy, which measures the degree of convective ...

Jun-Ichi Yano; Klaus Fraedrich; Richard Blender

2001-09-01T23:59:59.000Z

2

Climatic Regimes of Tropical Convection and Rainfall  

Science Conference Proceedings (OSTI)

Annual distribution and phase propagation of tropical convection are delineated using harmonic and amplitude-phase characteristics analysis of climatological pentad mean outgoing longwave radiation and monthly frequencies of highly reflective ...

Bin Wang

1994-07-01T23:59:59.000Z

3

ARM - Field Campaign - Year of Tropical Convection (YOTC)  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsYear of Tropical Convection (YOTC) govCampaignsYear of Tropical Convection (YOTC) Campaign Links Year of Tropical Convection Website Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Year of Tropical Convection (YOTC) 2008.05.01 - 2010.04.30 Lead Scientist : Sally McFarlane Description Example of a sonde profile available from the ARM Archive The realistic representation of tropical convection in global atmospheric models is a long-standing challenge for weather and global climate models. The lack of fundamental knowledge in this area causes difficulties in modeling and predicting prominent phenomena of the tropical atmosphere such as the inter-tropical convergence zone (ITCZ), El-Nino/Southern Oscillation (ENSO), monsoons, the Madden-Julian Oscillation (MJO), tropical cyclones,

4

Modeling Study of a Tropical Squall-Type Convective Line  

Science Conference Proceedings (OSTI)

A multidimensional and time-dependent cloud scale model is used to investigate the dynamic and micro-physical processes associated with convective and stratiform regions within a tropical squall-type convective line. The evolution of the total ...

Wei-Kuo Tao; Joanne Simpson

1989-01-01T23:59:59.000Z

5

Convective Momentum Transport over the Tropical Pacific: Budget Estimates  

Science Conference Proceedings (OSTI)

ECMWF and NCEP–NCAR reanalyses are used to calculate convective momentum transport (CMT) as a momentum budget residual over several tropical oceanic convective regions, including the TOGA COARE Intensive Flux Array (IFA). Sources of uncertainty ...

Matthew T. Carr; Christopher S. Bretherton

2001-07-01T23:59:59.000Z

6

Propagating and Standing Components of the Intraseasonal Oscillationin Tropical Convection  

Science Conference Proceedings (OSTI)

Two questions related to the intraseasonal variability of tropical convection and circulation remain controversial. 1) To what degree is the convective component of the Madden–Julian oscillation (MJO) a standing oscillation? 2) Is the eastward ...

Chidong Zhang; Harry H. Hendon

1997-03-01T23:59:59.000Z

7

The Tropical Convective Spectrum. Part I: Archetypal Vertical Structures  

Science Conference Proceedings (OSTI)

A taxonomy of tropical convective and stratiform vertical structures is constructed through cluster analysis of 3 yr of Tropical Rainfall Measuring Mission (TRMM) “warm-season” (surface temperature greater than 10°C) precipitation radar (PR) ...

Dennis J. Boccippio; Walter A. Petersen; Daniel J. Cecil

2005-07-01T23:59:59.000Z

8

Convective Precursors and Predictability in the Tropical Western Pacific  

Science Conference Proceedings (OSTI)

Conditions leading to convective outbreak in the Tropics are investigated by multivariate analysis of sounding and satellite data from the tropical western Pacific area. Circumstances that make the prediction problem difficult are discussed and ...

Steven C. Sherwood

1999-12-01T23:59:59.000Z

9

Physical Characterization of Tropical Oceanic Convection Observed in KWAJEX  

Science Conference Proceedings (OSTI)

The Tropical Rainfall Measuring Mission (TRMM) Kwajalein Experiment (KWAJEX) was designed to obtain an empirical physical characterization of precipitating convective clouds over the tropical ocean. Coordinated datasets were collected by three ...

Sandra E. Yuter; Robert A. Houze Jr.; Eric A. Smith; Thomas T. Wilheit; Edward Zipser

2005-04-01T23:59:59.000Z

10

Climatic regimes of tropical convection and rainfall  

SciTech Connect

Annual distribution and phase propagation of tropical convection are delineated using harmonic and amplitude-phase characteristics analysis of climatological pentad mean outgoing longwave radiation and monthly frequencies of highly reflective cloud. An annual eastward propagation of peak rainy season along the equator from the central Indian Ocean (60[degrees]E) to Arafura Sea (130[degrees]E) is revealed. This indicates a transition from the withdrawal of the Indian summer monsoon to the onset of the Australian summer monsoon. Significant bimodal variations are found around major summer monsoon regions. These variations originate from the interference of two adjacent regimes. The convergence zones over the eastern North Pacific, the South Pacific, and the southwest Indian Ocean are identified as a marine monsoon regime that is characterized by a unimodal variation with a concentrated summer rainfall associated with the development of surface westerlies equatorward of a monsoon trough. Conversely, the central North Pacific and North Atlantic convergence zones between persistent northeast and southeast trades are classified as trade-wind convergence zones; which differ from the marine monsoon regime by their persistent rainy season and characteristic bimodal variation with peak rainy seasons occurring in late spring and fall. The roles of the annual march of sea surface temperature in the phase propagation and formation of various climatic regimes of tropical convection are also discussed. 34 refs., 8 figs., 1 tab.

Wang, Bin (Univ. of Hawaii, Honolulu, HI (United States))

1994-07-01T23:59:59.000Z

11

Patterns of Convection in the Tropical Western Pacific  

NLE Websites -- All DOE Office Websites (Extended Search)

Patterns of Convection in the Tropical Western Pacific Patterns of Convection in the Tropical Western Pacific J. H. Mather Pacific Northwest National Laboratory Richland, Washington Introduction Convection is ubiquitous throughout the maritime continent region. However, the frequency of convec- tion is not uniform. While much of this region does not experience seasons to the same degree as one finds in mid-latitudes, the annual cycle of the sun's passage does have a large impact on convection throughout the maritime continent and the tropical western Pacific. The distribution of islands also affects convection in a variety of ways. Atmospheric Radiation Measurement (ARM) Program has three sites in the Tropical Western Pacific (TWP) region, illustrated in Figure 1. The sites are located on Manus, Nauru, and at Darwin, Australia.

12

The 30–60-Day Convection Seesaw between the Tropical Indian and Western Pacific Oceans  

Science Conference Proceedings (OSTI)

The tropical Indian and western Pacific oceans are two prominent action centers for tropical 30–60-day convective variability. When convection is enhanced over the equatorial Indian Ocean, the tropical western Pacific often experiences an ...

Baozhen Zhu; Bin Wang

1993-01-01T23:59:59.000Z

13

Tropical Convection and Precipitation Regimes in the Western United States  

Science Conference Proceedings (OSTI)

The authors have documented the relationship between tropical convection and precipitation regimes in the western United States. Circulation patterns associated with precipitation regimes are described and physical mechanisms are proposed. ...

Kingtse C. Mo; R. W. Higgins

1998-09-01T23:59:59.000Z

14

On the Relationship between Tropical Convection and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Tropical observations show convective activity increasing sharply above sea surface temperatures (SSTs) of around 26°C and then decreasing as the SST exceeds 30°C, with maximum observed SSTs of around 32°C.Although some aspects of this ...

Adrian M. Tompkins

2001-03-01T23:59:59.000Z

15

Convective Storm Initiation in a Moist Tropical Environment  

Science Conference Proceedings (OSTI)

Radar and satellite data from the Tropical Rainfall Measuring Mission–Large-Scale Biosphere–Atmosphere (TRMM–LBA) project have been examined to determine causes for convective storm initiation in the southwest Amazon region. The locations and ...

Maria Andrea Lima; James W. Wilson

2008-06-01T23:59:59.000Z

16

The “Footprint” under a Decaying Tropical Mesoscale Convective System  

Science Conference Proceedings (OSTI)

On 10 February 1993, during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment, the two NOAA WP-3Ds and the NCAR Electra flew under the anvil region of a decaying mesoscale convective system (MCS). Satellite and ...

Mark F. Geldmeier; Gary M. Barnes

1997-11-01T23:59:59.000Z

17

Observed Evolution of Tropical Deep Convective Events and Their Environment  

Science Conference Proceedings (OSTI)

Using a compositing technique, the temporal progression of tropical convective systems and the mean atmospheric state in their vicinity is constructed from a time series of geostationary satellite and operational rawinsonde data. The technique ...

Steven C. Sherwood; Ralph Wahrlich

1999-08-01T23:59:59.000Z

18

Deep Convective System Evolution over Africa and the Tropical Atlantic  

Science Conference Proceedings (OSTI)

In the tropical African and neighboring Atlantic region there is a strong contrast in the properties of deep convection between land and ocean. Here, satellite radar observations are used to produce a composite picture of the life cycle of ...

Joanna M. Futyan; Anthony D. Del Genio

2007-10-01T23:59:59.000Z

19

Transient Environmental Sensitivities of Explicitly Simulated Tropical Convection  

Science Conference Proceedings (OSTI)

A three-dimensional cloud-resolving model, maintained in a statistically steady convecting state by tropics-like forcing, is subjected to sudden (10 min) stimuli consisting of horizontally homogeneous temperature and/or moisture sources with ...

Stefan N. Tulich; Brian E. Mapes

2010-04-01T23:59:59.000Z

20

Climatology of Tropical Intraseasonal Convective Anomalies: 1979–2002  

Science Conference Proceedings (OSTI)

Tropical intraseasonal convective anomalies (TICA) have a central role in subseasonal changes in the coupled ocean–atmosphere system, but the climatology of TICA events has not been properly documented. This study exploits 24 years of outgoing ...

Charles Jones; Leila M. V. Carvalho; R. Wayne Higgins; Duane E. Waliser; J-K. E. Schemm

2004-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Circulation Anomalies Associated with Tropical Convection during Northern Winter  

Science Conference Proceedings (OSTI)

Lagged cross correlations between outgoing longwave radiation (OLR) and National Meteorological Center global analyses are utilized to isolate the preferred upper-level and surface circulation anomalies associated with tropical convection during ...

George N. Kiladis; Klaus M. Weickmann

1992-09-01T23:59:59.000Z

22

Sensitivity of Tropical Convection to Land Surface Processes  

Science Conference Proceedings (OSTI)

This paper studies the sensitivity of large-scale tropical convection to land surface changes in the general circulation model of the LMD. Ale method of analysis is based on a conceptual model of the energetics of convection applied every day of ...

J. Polcher

1995-09-01T23:59:59.000Z

23

Electrically Active Convection in Tropical Easterly Waves and Implications for Tropical Cyclogenesis in the Atlantic and East Pacific  

Science Conference Proceedings (OSTI)

In this study, the authors investigated the characteristics of tropical easterly wave convection and the possible implications of convective structure on tropical cyclogenesis and intensification over the Atlantic Ocean and the east Pacific Ocean. ...

Kenneth D. Leppert II; Walter A. Petersen; Daniel J. Cecil

2013-02-01T23:59:59.000Z

24

Response of Tropical Deep Convection to Localized Heating Perturbations: Implications for Aerosol-Induced Convective Invigoration  

Science Conference Proceedings (OSTI)

A cloud-system-resolving model is used to investigate the effects of localized heating/cooling perturbations on tropical deep convection, in the context of the aerosol “invigoration effect.” This effect supposes that a reduction of droplet ...

Hugh Morrison; Wojciech W. Grabowski

2013-11-01T23:59:59.000Z

25

Aerosol Indirect Effects on Tropical Convection Characteristics under Conditions of Radiative–Convective Equilibrium  

Science Conference Proceedings (OSTI)

The impacts of enhanced aerosol concentrations such as those associated with dust intrusions on the trimodal distribution of tropical convection have been investigated through the use of large-domain (10 000 grid points), fine-resolution (1 km), ...

Susan C. van den Heever; Graeme L. Stephens; Norman B. Wood

2011-04-01T23:59:59.000Z

26

Limiting Factors for Convective Cloud Top Height in the Tropics  

NLE Websites -- All DOE Office Websites (Extended Search)

Limiting Factors for Convective Cloud Top Limiting Factors for Convective Cloud Top Height in the Tropics M. P. Jensen and A. D. Del Genio National Aeronautics and Space Administration Goddard Institute for Space Studies Columbia University New York, New York Introduction Populations of tropical convective clouds are mainly comprised of three types: shallow trade cumulus, mid-level cumulus congestus and deep convective clouds (Johnson et al. 1999). Each of these cloud types has different impacts on the local radiation and water budgets. For climate model applications it is therefore important to understand the factors which determine the type of convective cloud that will occur. In this study, we concentrate on describing the factors that limit the cloud-top heights of mid-

27

Tropical Pacific impacts of convective momentum ... - Springer  

Science Conference Proceedings (OSTI)

MJO and monsoons, either directly by changing the atmospheric response to convection, or indirectly by altering the background climatology and ENSO. In fact

28

Properties of tropical convection observed by ARM millimeter-radars  

NLE Websites -- All DOE Office Websites (Extended Search)

Properties of tropical convection observed by ARM millimeter-radars Properties of tropical convection observed by ARM millimeter-radars Haynes, John Colorado State University Stephens, Graeme Colorado State University Category: Cloud Properties The results of an analysis of tropical cloud systems observed from a variety of vertically pointing radar systems are described. In particular, observations taken during five years of operation of the ARM millimeter wavelength radar system (MMCR) at Manus Island in the Tropical West Pacific region are characterized into cloud classes according to the radar reflectivity structures of these cloud systems, associated rainfall, and surface radiative properties. These observations of cloud properties are composited with respect to various phases of the Madden Julian Oscillation, which is a dominant mode of variability at Manus Island. A method of better

29

2–3-Day Convective Variability in the Tropical Western Pacific  

Science Conference Proceedings (OSTI)

This paper is an examination of 2–3-day convective variability in the tropical Pacific region. The initial focus of the paper is on the western tropical Pacific during the Tropical Ocean Global Atmosphere Coupled Ocean-Atmosphere Response ...

Carol Anne Clayson; Brian Strahl; Jon Schrage

2002-03-01T23:59:59.000Z

30

Convective Mixing near the Tropical Tropopause: Insights from Seasonal Variations  

Science Conference Proceedings (OSTI)

It has been suggested that convection remains important in the budget of water vapor up to the tropical tropopause or even higher. But observed seasonal variations of CO2 and water vapor in the lower stratosphere, and their timing, call the ...

Steven C. Sherwood; Andrew E. Dessler

2003-11-01T23:59:59.000Z

31

ENSO impact on Kelvin waves and associated tropical convection  

Science Conference Proceedings (OSTI)

The impact of El Niño-Southern Oscillation (ENSO) on atmospheric Kelvin waves and associated tropical convection is investigated using the ECMWF Re-Analysis, NOAA OLR and the analysis technique introduced in a previous study. It is found that the ...

Gui-Ying Yang; Brian Hoskins

32

Simulated Relationships between Sea Surface Temperatures and Tropical Convection in Climate Models and Their Implications for Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

The impact of enhanced atmospheric CO2 concentrations on tropical convection and sea surface temperatures (SSTs) over the global tropics is assessed using five fully coupled atmospheric–oceanic general circulation models (AOGCMs). Relationships ...

Jenni L. Evans; Jeffrey J. Waters

2012-11-01T23:59:59.000Z

33

ARM - Visiting the TWP  

NLE Websites -- All DOE Office Websites (Extended Search)

PacificVisiting the TWP PacificVisiting the TWP TWP Related Links Facilities and Instruments Manus Island Nauru Island Darwin, AUS ES&H Guidance Statement Operations Science Field Campaigns Year of Tropical Convection Visiting the Site TWP Fact Sheet Images Information for Guest Scientists Contacts Visiting the TWP Nauru Island from the air. Nauru Island from the air. The Tropical Western Pacific site consists of three diverse climate research facilities in Papua New Guinea, the Republic of Nauru, and Australia. Each facility has its own operating procedures and health and safety issues. Safety First! Before visiting any of the three TWP facilities, you must do the following: Submit a Site and Computer Access Request Form Read the Safety Plan for the facility you plan to visit: TWP Site Visit Safety Procedure

34

A Systemic Analysis of Multiscale Deep Convective Variability over the Tropical Pacific  

Science Conference Proceedings (OSTI)

The multiscale tropical deep convective variability over the Pacific Ocean is examined with the 4-month high-resolution deep convection index (ITBB) derived from satellite imagery. With a systemic view, the complex phenomenon is described with ...

Wen-wen Tung; Mitchell W. Moncrieff; Jian-Bo Gao

2004-07-01T23:59:59.000Z

35

A Satellite Infrared Technique to Estimate Tropical Convective and Stratiform Rainfall  

Science Conference Proceedings (OSTI)

This paper describes a new method of estimating both tropical convective precipitation and stratiform precipitation (produced under the anvils of mature and decaying convective systems) from satellite infrared data. The method, denoted CST (...

Robert F. Adler; Andrew J. Negri

1988-01-01T23:59:59.000Z

36

The Relationship between Tropical Cyclone Intensity Change and the Strength of Inner-Core Convection  

Science Conference Proceedings (OSTI)

Convective intensity proxies measured by the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI), Precipitation Radar (PR), and Visible and Infrared Scanner (VIRS) are used to assess the relationship between intense convection in the ...

Haiyan Jiang

2012-04-01T23:59:59.000Z

37

Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation  

Science Conference Proceedings (OSTI)

By applying a cloud tracking algorithm to tropical convective systems in a simulated a regional high resolution model simulation, this study documents the environmental conditions before and after convective systems are initiated over ocean and ...

Samson Hagos; Zhe Feng; Sally McFarlane; L. Ruby Leung

38

From Hot Towers to TRMM: Joanne Simpson and Advances in Tropical Convection Research  

Science Conference Proceedings (OSTI)

Joanne Simpson began contributing to advances in tropical convection about half a century ago. The hot tower hypothesis jointly put forth by Joanne Simpson and Herbert Riehl postulated that deep convective clouds populating the “equatorial trough ...

Robert A. Houze Jr.

2003-01-01T23:59:59.000Z

39

Stochastic behavior of tropical convection in observations and a multicloud model  

Science Conference Proceedings (OSTI)

The aim for a more accurate representation of tropical convection in global circulation models is a long-standing issue. Here, the relationships between large- and convective scales in observations and a Stochastic Multicloud Model (SMCM) to ...

Karsten Peters; Christian Jakob; Laura Davies; Boualem Khouider; Andrew J. Majda

40

Walker-Type Mean Circulations and Convectively Coupled Tropical Waves as an Interacting System  

Science Conference Proceedings (OSTI)

Interactions between convectively coupled tropical waves and Walker-type mean circulations are examined using a two-dimensional analytic model wherein drying and cooling of the boundary layer by convective and mesoscale downdrafts are in ...

Jun-Ichi Yano; Mitchell W. Moncrieff; Wojciech W. Grabowski

2002-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Environment and the Lifetime of Tropical Deep Convection in a Cloud-Permitting Regional Model Simulation  

Science Conference Proceedings (OSTI)

By applying a cloud-tracking algorithm to tropical convective systems in a regional high-resolution model simulation, this study documents the environmental conditions before and after convective systems are initiated over ocean and land by ...

Samson Hagos; Zhe Feng; Sally McFarlane; L. Ruby Leung

2013-08-01T23:59:59.000Z

42

Updraft and Downdraft Statistics of Simulated Tropical and Midlatitude Cumulus Convection  

Science Conference Proceedings (OSTI)

This paper presents a detailed analysis of updraft and downdraft statistics of simulated tropical oceanic and midlatitude continental cumulus convection, with an emphasis on the individual terms in the vertical momentum budget. Strong convective ...

Kuan-Man Xu; David A. Randall

2001-07-01T23:59:59.000Z

43

A Model of Rossby Waves Linked to Submonthly Convection over the Eastern Tropical Pacific  

Science Conference Proceedings (OSTI)

Equatorward-propagating wave trains in the upper troposphere are observed to be associated with deep convection over the eastern tropical Pacific on the submonthly timescale during northern winter. The convection occurs in the regions of ascent ...

Adrian J. Matthews; George N. Kiladis

2000-12-01T23:59:59.000Z

44

Using the Stochastic Multicloud Model to Improve Tropical Convective Parameterization: A Paradigm Example  

Science Conference Proceedings (OSTI)

Despite recent advances in supercomputing, current general circulation models (GCMs) poorly represent the variability associated with organized tropical convection. A stochastic multicloud convective parameterization based on three cloud types (...

Yevgeniy Frenkel; Andrew J. Majda; Boualem Khouider

2012-03-01T23:59:59.000Z

45

Horizontal Structure and Seasonality of Large-Scale Circulations Associated with Submonthly Tropical Convection  

Science Conference Proceedings (OSTI)

The relationship between deep tropical convection and large-scale atmospheric circulation in the 6–30-day period range is examined. Regression relationships between filtered outgoing longwave radiation at various locations in the Tropics and 200- ...

George N. Kiladis; Klaus M. Weickmann

1997-09-01T23:59:59.000Z

46

A Modeling Study on the Early Electrical Development of Tropical Convection: Continental and Oceanic (Monsoon) Storms  

Science Conference Proceedings (OSTI)

Numerical modeling studies of continental tropical and maritime tropical convection were conducted using the two-dimensional, nonhydrostatic, cloud electrification model developed at the South Dakota School of Mines and Technology. The model ...

Scot C. Randell; Steven A. Rutledge; Richard D. Farley; John H. Helsdon Jr.

1994-08-01T23:59:59.000Z

47

Characteristics of Deep Tropical and Subtropical Convection from Nadir-Viewing High-Altitude Airborne Doppler Radar  

Science Conference Proceedings (OSTI)

This paper presents observations of deep convection characteristics in the tropics and subtropics that have been classified into four categories: tropical cyclone, oceanic, land, and sea breeze. Vertical velocities in the convection were derived ...

Gerald M. Heymsfield; Lin Tian; Andrew J. Heymsfield; Lihua Li; Stephen Guimond

2010-02-01T23:59:59.000Z

48

Interannual to Diurnal Variations in Tropical and Subtropical Deep Convective Clouds and Convective Overshooting from Seven Years of AMSU-B Measurements  

Science Conference Proceedings (OSTI)

This study surveys interannual to diurnal variations of tropical deep convective clouds and convective overshooting using the Advanced Microwave Sounding Unit B (AMSU-B) aboard the NOAA polar orbiting satellites from 1999 to 2005. The methodology ...

Gang Hong; Georg Heygster; Justus Notholt; Stefan A. Buehler

2008-09-01T23:59:59.000Z

49

A Simple Multicloud Parameterization for Convectively Coupled Tropical Waves. Part II: Nonlinear Simulations  

Science Conference Proceedings (OSTI)

Observations in the Tropics point to the important role of three cloud types, congestus, stratiform, and deep convective clouds, besides ubiquitous shallow boundary layer clouds for both the climatology and large-scale organized anomalies such as ...

Boualem Khouider; Andrew J. Majda

2007-02-01T23:59:59.000Z

50

Impact of Stochastic Convection on Ensemble Forecasts of Tropical Cyclone Development  

Science Conference Proceedings (OSTI)

Two versions of the Navy Operational Global Atmospheric Prediction System (NOGAPS) global ensemble, with and without a stochastic convection scheme, are compared regarding their performance in predicting the development and evolution of tropical ...

Andrew Snyder; Zhaoxia Pu; Carolyn A. Reynolds

2011-02-01T23:59:59.000Z

51

Organization of Tropical Convection in Low Vertical Wind Shears: The Role of Water Vapor  

Science Conference Proceedings (OSTI)

A modeling study is conducted to gain insight into the factors that control the intensity and organization of tropical convection, and in particular to examine if organization occurs in the absence of factors such as vertical wind shear or ...

Adrian M. Tompkins

2001-03-01T23:59:59.000Z

52

High-Resolution Passive Microwave Observations of Convective Systems over the Tropical Pacific Ocean  

Science Conference Proceedings (OSTI)

This paper presents high-resolution passive microwave measurements obtained in the western Pacific warm pool region. These measurements represent the most comprehensive such observations of convection over the tropical oceans to date, and were ...

Gary McGaughey; Edward J. Zipser; Roy W. Spencer; Robbie E. Hood

1996-11-01T23:59:59.000Z

53

A Satellite Study of Tropical Moist Convection and Environmental Variability: A Moisture and Thermal Budget Analysis  

Science Conference Proceedings (OSTI)

The thermodynamic variability associated with moist convection over tropical oceans is analyzed by making use of a variety of satellite sensors including radars, an infrared and microwave sounder unit, and a microwave radiometer and scatterometer ...

Hirohiko Masunaga

2013-08-01T23:59:59.000Z

54

Composite Life Cycle of Maritime Tropical Mesoscale Convective Systems in Scatterometer and Microwave Satellite Observations  

Science Conference Proceedings (OSTI)

This study examines scatterometer-observed surface wind divergence and vorticity, along with precipitable water (PW), across the life cycle of tropical maritime mesoscale convective systems (MCSs) as resolved in 0.5° data. Simple composites were ...

Brian Mapes; Ralph Milliff; Jan Morzel

2009-01-01T23:59:59.000Z

55

Tropical Cyclogenesis Sensitivity to Environmental Parameters in Radiative-Convective Equilibrium  

E-Print Network (OSTI)

In this study, the relationship between the likelihood of tropical cyclogenesis and external environmental forcings is explored in the simplest idealized modelling framework possible: radiative-convective equilibrium on a ...

Nolan, David S.

56

Climatic Equilibrium of the Atmospheric Convective Boundary Layer over a Tropical Ocean  

Science Conference Proceedings (OSTI)

A one-dimensional thermodynamic model for a partially mixed, partly cloudy, convective boundary layer (CBL) is coupled to a radiation model to compute equilibrium solutions for a tropical CBL and troposphere in energy balance over the ocean. For ...

Alan K. Betts; W. Ridgway

1989-09-01T23:59:59.000Z

57

The “Year” of Tropical Convection (May 2008–April 2010): Climate Variability and Weather Highlights  

Science Conference Proceedings (OSTI)

The representation of tropical convection remains a serious challenge to the skillfulness of our weather and climate prediction systems. To address this challenge, the World Climate Research Programme (WCRP) and The Observing System Research and ...

Duane E. Waliser; Mitchell W. Moncrieff; David Burridge; Andreas H. Fink; Dave Gochis; B. N. Goswami; Bin Guan; Patrick Harr; Julian Heming; Huang-Hsuing Hsu; Christian Jakob; Matt Janiga; Richard Johnson; Sarah Jones; Peter Knippertz; Jose Marengo; Hanh Nguyen; Mick Pope; Yolande Serra; Chris Thorncroft; Matthew Wheeler; Robert Wood; Sandra Yuter

2012-08-01T23:59:59.000Z

58

Influence of Sea Surface Temperature on Humidity and Temperature in the Outflow of Tropical Deep Convection  

Science Conference Proceedings (OSTI)

Multiple years of measurements of tropical upper-tropospheric temperature and humidity by the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) project are analyzed in the vicinity of deep convective outflow to study the ...

Zhengzhao Johnny Luo; Dieter Kley; Richard H. Johnson; G. Y. Liu; Susanne Nawrath; Herman G. J. Smit

2012-02-01T23:59:59.000Z

59

Passive Microwave Observations of the Stratiform Regions of Two Tropical Oceanic Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

High-resolution passive microwave observations within the stratiform regions of two different tropical oceanic mesoscale convective systems are investigated in detail. The observations were obtained from the Advanced Microwave Precipitation ...

Gary McGaughey; Edward J. Zipser

1996-11-01T23:59:59.000Z

60

On the Identification of the Large-Scale Properties of Tropical Convection using Cloud Regimes  

Science Conference Proceedings (OSTI)

The use of cloud regimes in identifying tropical convection and the associated large-scale atmospheric properties is investigated. The regimes are derived by applying cluster analysis to satellite retrievals of daytime-averaged frequency ...

Jackson Tan; Christian Jakob; Todd P. Lane

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Reproducibility by Climate Models of Cloud Radiative Forcing Associated with Tropical Convection  

Science Conference Proceedings (OSTI)

In this study, cloud radiative forcing (CRF) associated with convective activity over tropical oceans is analyzed for monthly mean data from twentieth-century simulations of 18 climate models participating in phase 3 of the Coupled Model ...

Hiroki Ichikawa; Hirohiko Masunaga; Yoko Tsushima; Hiroshi Kanzawa

2012-02-01T23:59:59.000Z

62

Tropical Cyclone Convection and Intensity Analysis Using Differenced Infrared and Water Vapor Imagery  

Science Conference Proceedings (OSTI)

A technique to identify and quantify intense convection in tropical cyclones (TCs) using bispectral, geostationary satellite imagery is explored. This technique involves differencing the water vapor (WV) and infrared window (IRW) channel ...

Timothy L. Olander; Christopher S. Velden

2009-12-01T23:59:59.000Z

63

Variability of Graupel and Snow Observed in Tropical Oceanic Convection by Aircraft during TRMM KWAJEX  

Science Conference Proceedings (OSTI)

Empirical characterization of graupel and snow in precipitating tropical convective clouds is important for refining satellite precipitation retrieval algorithms and cloud-resolving and radiative transfer models. Microphysics data for this ...

Ellen M. Sukovich; David E. Kingsmill; Sandra E. Yuter

2009-02-01T23:59:59.000Z

64

The effect of moist convection on the tropospheric response to tropical and subtropical zonally asymmetric torques  

Science Conference Proceedings (OSTI)

Tropospheric winds can be altered by vertical transfers of momentum due to orographic gravity waves and convection. Previous work showed that, in dry models, such zonally asymmetric torques produce a pattern of tropical ascent that is well-...

William R. Boos; Tiffany A. Shaw

65

On the Potential of VHF Wind Profilers for Studying Convective Processes in the Tropics  

Science Conference Proceedings (OSTI)

In this paper we provide a set of examples to demonstrate the potential of VHF radar wind profilers for studying tropical convection processes. Our examples were extracted from data obtained from the NOAA/CU Pacific Profiler Network, which has ...

B. B. Balsley; D. A. Carter; A. C. Riddle; W. L. Ecklund; K. S. Gage

1991-09-01T23:59:59.000Z

66

Latent Heating and Mixing Due to Entrainment in Tropical Deep Convection  

Science Conference Proceedings (OSTI)

Recent studies have noted the role of latent heating above the freezing level in reconciling Riehl and Malkus’ Hot Tower Hypothesis (HTH) with evidence of diluted tropical deep convective cores. This study evaluates recent modifications to the HTH ...

Clayton J. McGee; Susan C. van den Heever

67

Microphysical Processes Evident in Aerosol Forcing of Tropical Deep Convective Clouds  

Science Conference Proceedings (OSTI)

This study investigates the effects of aerosols on tropical deep convective clouds (DCCs). A series of large-scale, two-dimensional cloud-resolving model simulations was completed, differing only in the concentration of aerosols available to act ...

Rachel L. Storer; Susan C. van den Heever

2013-02-01T23:59:59.000Z

68

A Satellite Study of Tropical Moist Convection and Environmental Variability: A Moisture and Thermal Budget Analysis  

Science Conference Proceedings (OSTI)

The thermodynamic variability associated with moist convection over tropical oceans is analyzed by making use of a variety of satellite sensors including radars, an infrared and microwave sounder unit, and microwave radiometer and scatterometer ...

Hirohiko Masunaga

69

The Interaction Between Deep Convection and Easterly Waves over Tropical North Africa: A Weather State Perspective  

Science Conference Proceedings (OSTI)

The interaction between deep convection and easterly waves over tropical North Africa is studied using a weather state (WS) dataset from the International Cloud Climatology Project (ISCCP) and reanalysis products from the European Centre for ...

Ademe Mekonnen; William B. Rossow

2011-08-01T23:59:59.000Z

70

A Test of the Simulation of Tropical Convective Cloudiness by a Cloud-Resolving Model  

Science Conference Proceedings (OSTI)

A methodology is described for testing the simulation of tropical convective clouds by models through comparison with observations of clouds and precipitation from earth-orbiting satellites. Clouds are divided into categories that represent ...

Mario A. Lopez; Dennis L. Hartmann; Peter N. Blossey; Robert Wood; Christopher S. Bretherton; Terence L. Kubar

2009-06-01T23:59:59.000Z

71

Microphysics of Maritime Tropical Convective Updrafts at Temperatures from ?20° to ?60°  

Science Conference Proceedings (OSTI)

Anvils produced by vigorous tropical convection contribute significantly to the earth’s radiation balance, and their radiative properties depend largely on the concentrations and sizes of the ice particles that form them. These microphysical ...

Andrew J. Heymsfield; Aaron Bansemer; Gerald Heymsfield; Alexandre O. Fierro

2009-12-01T23:59:59.000Z

72

Properties of Tropical Convection Observed by Millimeter-Wave Radar Systems  

Science Conference Proceedings (OSTI)

This paper describes the results of analysis of over 825 000 profiles of millimeter-wave radar (MWR) reflectivities primarily collected by zenith-pointing surface radars observing tropical convection associated with various phases of activity of ...

Graeme L. Stephens; Norman B. Wood

2007-03-01T23:59:59.000Z

73

Numerical Simulation of a Tropical Mesoscale Convective System Using the Arakawa-Schubert Cumulus Parameterization  

Science Conference Proceedings (OSTI)

As an extension of the work presented in an accompanying paper of Kao and Ogura, the Arakawa-Schubert cumulus parameterization scheme is examined prognostically in a modeling study of the evolution of a convectively driven tropical mesoscale ...

Yoshi Ogura; Chih-Yue Jim Kao

1987-09-01T23:59:59.000Z

74

Intraseasonal Modulation of the North Pacific Storm Track by Tropical Convection in Boreal Winter  

Science Conference Proceedings (OSTI)

The modulation of the North Pacific storm track by tropical convection on intraseasonal time scales (30–90 days) in boreal winter (December–March) is investigated using the NCEP–NCAR reanalysis and NOAA satellite outgoing longwave radiation (OLR) ...

Yi Deng; Tianyu Jiang

2011-02-01T23:59:59.000Z

75

Structural Characteristics of Deep Convective Systems over Tropical Africa and the Atlantic Ocean  

Science Conference Proceedings (OSTI)

The structural properties of convective cloud clusters of tropical Africa and the Atlantic Ocean are studied using six summers of Meteosat satellite data in the atmospheric infrared window. A cluster at a given brightness temperature threshold is ...

L. A. Toledo Machado; M. Desbois; J-Ph Duvel

1992-03-01T23:59:59.000Z

76

Feature-Point Detection Using Distance Transforms: Application to Tracking Tropical Convective Complexes  

Science Conference Proceedings (OSTI)

The identification, tracking, and statistical analysis of tropical convective complexes using satellite imagery is explored in the context of identifying feature points suitable for tracking. The feature points are determined based on the shape ...

K. I. Hodges

1998-03-01T23:59:59.000Z

77

The Skill of ECMWF Medium-Range Forecasts during the Year of Tropical Convection 2008  

Science Conference Proceedings (OSTI)

This study uses the European Centre for Medium-Range Weather Forecasts (ECMWF) model-generated high-resolution 10-day-long predictions for the Year of Tropical Convection (YOTC) 2008. Precipitation forecast skills of the model over the tropics ...

Arindam Chakraborty

2010-10-01T23:59:59.000Z

78

Cloud and Radiative Characteristics of Tropical Deep Convective Systems in Extended Cloud Objects from CERES Observations  

Science Conference Proceedings (OSTI)

The physical and radiative properties of tropical deep convective systems for the period from January to August 1998 are examined with the use of Clouds and the Earth’s Radiant Energy System Single-Scanner Footprint (SSF) data from the Tropical ...

Zachary A. Eitzen; Kuan-Man Xu; Takmeng Wong

2009-11-01T23:59:59.000Z

79

The Effect of Horizontal Pressure Gradients on the Momentum Transport in Tropical Convective Lines. Part II: Lagrangian Calculations  

Science Conference Proceedings (OSTI)

The movement of a set of Lagrangian parcels in the two-dimensional pressure field associated with a tropical convective line is considered. The results are compared with observational characteristics of GATE quasi-two-dimensional convective ...

Maria Flatau; Duane E. Stevens

1987-08-01T23:59:59.000Z

80

Convective Influence on the Heat Balance of the Tropical Tropopause Layer: A Cloud-Resolving Model Study  

Science Conference Proceedings (OSTI)

The tropical tropopause layer (TTL), and in particular the cold point tropopause, has been previously suggested as a feature decoupled from convection. Using a cloud-resolving model, the authors demonstrate that convection, in fact, has a cooling ...

Zhiming Kuang; Christopher S. Bretherton

2004-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Convective and Rainfall Properties of Tropical Cyclone Inner Cores and Rainbands from 11 Years of TRMM Data  

Science Conference Proceedings (OSTI)

Convective and rainfall properties of tropical cyclones (TCs) are statistically quantified by using Tropical Rainfall Measuring Mission (TRMM) data from December 1997 to December 2008. A semimanual method is used to divide the TC raining area into ...

Haiyan Jiang; Ellen M. Ramirez; Daniel J. Cecil

2013-02-01T23:59:59.000Z

82

Simulation of Tropical Convective Systems. Part I: A Cumulus Parameterization  

Science Conference Proceedings (OSTI)

A new cumulus parametefization is developed for ffse in mesoscale model simulations of precipitating convective systems. It is designed to estimate convective properties using a cloud model that interacts with the mesoscale model in a physically ...

William M. Frank; Charles Cohen

1987-12-01T23:59:59.000Z

83

Thermodynamic and Circulation Characteristics, of Winter Monsoon Tropical Mesoscale Convection  

Science Conference Proceedings (OSTI)

During the December 1978 field phase of the International Winter Monsoon Experiment (Winter MONEX), a regular diurnal cycle of deep convective activity occurred over the South China Sea immediately to the north of Borneo. The convection was ...

Richad H. Johnson; Donald C. Kriete

1982-12-01T23:59:59.000Z

84

Regional Variability in Tropical Convection: Observations from TRMM  

Science Conference Proceedings (OSTI)

Observation of the vertical profile of precipitation over the global Tropics is a key objective of the Tropical Rainfall Measuring Mission (TRMM) because this information is central to obtaining vertical profiles of latent heating. This study ...

Walter A. Petersen; Steven A. Rutledge

2001-09-01T23:59:59.000Z

85

The Association of Tall Eyewall Convection with Tropical Cyclone Intensification .  

E-Print Network (OSTI)

??Despite decades of research, operational weather agencies still find it difficult to predict change in the intensity of a tropical cyclone's surface wind. This dissertation… (more)

Kelley, Owen A.

2008-01-01T23:59:59.000Z

86

Stratospheric Gravity Waves Generated by Multiscale Tropical Convection  

Science Conference Proceedings (OSTI)

The generation of gravity waves by multiscale cloud systems evolving in an initially motionless and thermodynamically uniform environment is explored using a two-dimensional cloud-system-resolving model. The simulated convection has similar depth ...

Todd P. Lane; Mitchell W. Moncrieff

2008-08-01T23:59:59.000Z

87

Numerical Modeling of Gravity Wave Generation by Deep Tropical Convection  

Science Conference Proceedings (OSTI)

Although convective clouds are known to generate internal gravity waves, the mechanisms responsible are not well understood. The present study seeks to clarify the dynamics of wave generation using a high-resolution numerical model of deep ...

Todd P. Lane; Michael J. Reeder; Terry L. Clark

2001-05-01T23:59:59.000Z

88

Structure of Large-Scale Convective Anomalies over Tropical Oceans  

Science Conference Proceedings (OSTI)

Geographical variations in the variance and cross-correlation of monthly mean sea surface temperature (SST), outgoing longwave radiation (OLR, a proxy for deep convection and vertical motion), and convergence of winds at the surface and at 850 mb ...

David S. Gutzler; Tamara M. Wood

1990-04-01T23:59:59.000Z

89

Thermodynamic Environments of Deep Convection in Atlantic Tropical Disturbances  

Science Conference Proceedings (OSTI)

Conditional composites of dropsondes deployed into eight tropical Atlantic weather systems during 2010 are analyzed. The samples are conditioned based on cloud-top temperature within 10 km of the dropsonde, the radius from the cyclonic circulation ...

Christopher A. Davis; David A. Ahijevych

2013-07-01T23:59:59.000Z

90

Convective Impact on Temperatures Observed near the Tropical Tropopause  

Science Conference Proceedings (OSTI)

Observed temperature trends and interannual variations near the tropical tropopause suggest that temperatures up to the cold point are controlled by the troposphere, but some models indicate otherwise. Here, previous investigations of thermal ...

Steven C. Sherwood; Takeshi Horinouchi; Heidi A. Zeleznik

2003-08-01T23:59:59.000Z

91

Tropical Intraseasonal Oscillation, Super Cloud Clusters, and Cumulus Convection Schemes  

Science Conference Proceedings (OSTI)

A new framework for interpreting the origin of the tropical intraseasonal oscillation (TISO), which avoids the speed and scale selection problems in the previous theories, is proposed in this study. In this interpretation TISO is viewed as an ...

Winston C. Chao; Shian-Jiann Lin

1994-05-01T23:59:59.000Z

92

Coupling between Gravity Waves and Tropical Convection at Mesoscales  

Science Conference Proceedings (OSTI)

An idealized cloud-system-resolving model simulation is used to examine the coupling between a tropical cloud population and the mesoscale gravity waves that it generates. Spectral analyses of the cloud and gravity wave fields identify a clear ...

Todd P. Lane; Fuqing Zhang

2011-11-01T23:59:59.000Z

93

Effects of Downdrafts and Mesoscale Convective Organization on the Heat and Moisture Budgets of Tropical Cloud Clusters. Part III: Effects of Mesoscale Convective Organization  

Science Conference Proceedings (OSTI)

The effects of mesoscale convective organization on the large-scale heat and moisture budgets of tropical cloud clusters are studied using the GATE Phase III data. Two basic questions concerning the mesoscale effects are addressed: 1) the ...

Ming-Dean Cheng; Michio Yanai

1989-06-01T23:59:59.000Z

94

Do the Tallest Convective Cells over the Tropical Ocean Have Slow Updrafts?  

Science Conference Proceedings (OSTI)

Far from continents, a few storms lift precipitation-size ice particles into the stratosphere, 17 to 18 km above the tropical ocean. This study is the first to examine the observed properties of a large sample of these extremely tall convective ...

Owen A. Kelley; John Stout; Michael Summers; Edward J. Zipser

2010-05-01T23:59:59.000Z

95

A Trajectory Analysis of Tropical Upper-Tropospheric Moisture and Convection  

Science Conference Proceedings (OSTI)

It is shown that the distribution of upper-tropospheric humidity (UTH) in the cloud-free Tropics can be simulated with a simple model in which air expelled from moist convective regions is dried by subsidence along its trajectory. The ...

Eric P. Salathé Jr.; Dennis L. Hartmann

1997-10-01T23:59:59.000Z

96

Modeling the Impact of Convective Entrainment on the Tropical Tropopause  

Science Conference Proceedings (OSTI)

Simulations with the Weather Research and Forecasting (WRF) cloud-resolving model of deep moist convective events reveal net cooling near the tropopause (15–18 km above ground), caused by a combination of large-scale ascent and small-scale ...

F. J. Robinson; S. C. Sherwood

2006-03-01T23:59:59.000Z

97

A Test of Convective Parameterizations in a Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

In recent years a number of different methods have been proposed for the inclusion of the effects of cumuli in numerical models of tropical cyclones. In this paper several of the Kuo-type parameterizations have been tested by simulating the ...

Jay S. Hobgood; John N. Rayner

1989-06-01T23:59:59.000Z

98

Virtual Field Campaigns on Deep Tropical Convection in Climate Models  

Science Conference Proceedings (OSTI)

High-resolution time–height data over warm tropical oceans are examined, from three global atmosphere models [GFDL’s Atmosphere Model 2 (AM2), NCAR’s Community Atmosphere Model, version 3 (CAM3), and a NASA Global Modeling and Assimilation Office ...

Brian Mapes; Julio Bacmeister; Marat Khairoutdinov; Cecile Hannay; Ming Zhao

2009-01-01T23:59:59.000Z

99

Convection over Tropical Africa and the Atlantic Ocean during Northern Summer. Part I: Interannual and Diurnal Variations  

Science Conference Proceedings (OSTI)

Some aspects of the interannual and the diurnal variations of the convection over the tropical Africa and the Atlantic Ocean are derived using Meteosat data. The study is based on four summer months (June, July, August and September) of three ...

Jean Philippe Duvel

1989-12-01T23:59:59.000Z

100

Convective Activity over Africa and the Tropical Atlantic Inferred from 20 Years of Geostationary Meteosat Infrared Observations  

Science Conference Proceedings (OSTI)

A 20-yr (1986–2005) time series of Meteosat Visible and Infrared Imager (MVIRI) geostationary infrared observations was used to study deep convection over Africa and the tropical Atlantic. The 20-yr time period is covered by six consecutive ...

Ralf Bennartz; Marc Schroeder

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Sensitivity of Tropical Pacific Convection to Dry Layers at Mid- to Upper Levels: Simulation and Parameterization Tests  

Science Conference Proceedings (OSTI)

Numerical forecast experiments are carried out to investigate the implications of observed moisture variability in the tropical Pacific for deep convection. The study uses a series of quasi-cloud-resolving model forecasts with a triple-nested ...

James A. Ridout

2002-12-01T23:59:59.000Z

102

Modulation of South Indian Ocean Tropical Cyclones by the Madden–Julian Oscillation and Convectively Coupled Equatorial Waves  

Science Conference Proceedings (OSTI)

The subseasonal modulation of tropical cyclone (TC) genesis by large-scale atmospheric wave modes is studied using data from the south Indian Ocean region. The modes considered are the Madden–Julian oscillation (MJO), and the convectively coupled ...

Miloud Bessafi; Matthew C. Wheeler

2006-02-01T23:59:59.000Z

103

Interaction between Intraseasonal Oscillations of the Midlatitude Flow and Tropical Convection during 1979 Northern Summer: The Pacific Ocean  

Science Conference Proceedings (OSTI)

It has been inferred and illustrated by many studies in terms of outgoing longwave radiation (OLR) and velocity potential (?) that energy is input into the intraseasonal oscillation through tropical cumulus convection, especially over the monsoon ...

Tsing-Chang Chen; Ming-Chen Yen

1991-07-01T23:59:59.000Z

104

Influence of Convective Momentum Transport on Mixed Rossby-Gravity waves: A contribution to tropical two-day waves  

Science Conference Proceedings (OSTI)

Influences of convective momentum transport (CMT) on tropical waves are analytically studied with an idealized model, which captures the first-order baroclinic structure in the vertical. The CMT has significant influence on the mixed Rossby-...

Lei Zhou; In-Sik Kang

105

The Relationship between Precipitation and Lightning in Tropical Island Convection: A C-Band Polarimetric Radar Study  

Science Conference Proceedings (OSTI)

One of the primary scientific objectives of the Maritime Continent Thunderstorm Experiment was to study cloud electrification processes in tropical island convection, in particular, the coupling between ice phase precipitation and lightning ...

Lawrence D. Carey; Steven A. Rutledge

2000-08-01T23:59:59.000Z

106

Multiscale Convective Wave Disturbances in the Tropics: Insights from a Two-Dimensional Cloud-Resolving Model  

Science Conference Proceedings (OSTI)

Multiscale convective wave disturbances with structures broadly resembling observed tropical waves are found to emerge spontaneously in a nonrotating, two-dimensional cloud model forced by uniform cooling. To articulate the dynamics of these ...

Stefan N. Tulich; Brian E. Mapes

2008-01-01T23:59:59.000Z

107

A Radiative–Convective Equilibrium Perspective of Weakening of the Tropical Walker Circulation in Response to Global Warming  

Science Conference Proceedings (OSTI)

Both observational analysis and GCM simulations indicate that the tropical Walker circulation is becoming weaker and may continue to weaken as a consequence of climate change. Here, the authors use a conceptual radiative–convective equilibrium (...

Xianglei Huang; Hui-Wen Chuang; Andrew Dessler; Xiuhong Chen; Kenneth Minschwaner; Yi Ming; V. Ramaswamy

2013-03-01T23:59:59.000Z

108

The Role of Large-Scale Atmospheric Circulation in the Relationship between Tropical Convection and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

In this paper, the authors study the influence of the large-scale atmospheric circulation on the relationship between sea surface temperature (SST) and tropical convection inferred from outgoing longwave radiation (OLR). They find that under ...

K-M. Lau; H-T. Wu; S. Bony

1997-03-01T23:59:59.000Z

109

The effects of imposed stratospheric cooling on the maximum intensity of tropical cyclones in axisymmetric radiative-convective equilibrium  

Science Conference Proceedings (OSTI)

The effects of stratospheric cooling and sea surface temperature (SST) warming on tropical cyclone (TC) potential intensity (PI) are explored using an axisymmetric cloud-resolving model run to radiative-convective equilibrium (RCE). Almost all ...

Hamish A. Ramsay

110

The Role of Radiation in Influencing Tropical Cloud Distributions in a Radiative–Convective Equilibrium Cloud-Resolving Model  

Science Conference Proceedings (OSTI)

Observations by Johnson et al. depict regions of active tropical convection as possessing increased relative humidity through a deep layer and reduced low-level static stability when compared to nonconvecting regions. Shallow cumulus clouds, ...

Lyle Pakula; Graeme L. Stephens

2009-01-01T23:59:59.000Z

111

Quantitative Assessment of Diurnal Variation of Tropical Convection Simulated by a Global Nonhydrostatic Model without Cumulus Parameterization  

Science Conference Proceedings (OSTI)

This study investigated the resolution dependence of diurnal variation in tropical convective systems represented by a global nonhydrostatic model without cumulus parameterization. This paper describes the detailed characteristics of diurnal ...

Akira T. Noda; Kazuyoshi Oouchi; Masaki Satoh; Hirofumi Tomita

2012-07-01T23:59:59.000Z

112

Squall Lines and Convectively Coupled Gravity Waves in the Tropics: Why Do Most Cloud Systems Propagate Westward?  

Science Conference Proceedings (OSTI)

The coupling between tropical convection and zonally propagating gravity waves is assessed through Fourier analysis of high-resolution (3-hourly, 0.5°) satellite rainfall data. Results show the familiar enhancement in power along the dispersion ...

Stefan N. Tulich; George N. Kiladis

2012-10-01T23:59:59.000Z

113

The sensitivity of tropical convective precipitation to the direct radiative forcings of black carbon aerosols emitted from major regions  

E-Print Network (OSTI)

Previous works have suggested that the direct radiative forcing (DRF) of black carbon (BC) aerosols are able to force a significant change in tropical convective precipitation ranging from the Pacific and Indian Ocean to ...

Wang, Chien

114

Spatial and Annual Variations in the Diurnal Cycle of Large-Scale Tropical Convective Cloudiness and Precipitation  

Science Conference Proceedings (OSTI)

Three years of three-hourly infrared satellite data from the American geostationary satellites were used to determine the large-scale spatial and temporal variations in the diurnal cycle of tropical convective precipitation. The region examined ...

Bernard N. Meisner; Phillip A. Arkin

1987-09-01T23:59:59.000Z

115

Comparison of the Highly Reflective Cloud and Outgoing Longwave Radiation Datasets for Use in Estimating Tropical Deep Convection  

Science Conference Proceedings (OSTI)

Currently, there are two long-term satellite-derived datasets most are frequently used as indices for tropical deep convection. These are the Outgoing Longwave Radiation (OLR) and Highly Reflective Cloud (HRC) datasets. Although both of these ...

Duane E. Waliser; Nicholas E. Graham; Catherine Gautier

1993-02-01T23:59:59.000Z

116

Tropical Wave Instabilities: Convective Interaction with Dynamics Using the Emanuel Convective Parameterization  

Science Conference Proceedings (OSTI)

Wave-CISK and evaporation-wind feedback modes, also known as WISHE (wind-induced surface heat exchange) modes, are investigated using a two-dimensional (x?p), hydrostatic, nonrotational model linearized about a basic state in radiative-convective ...

Randy G. Brown; Christopher S. Bretherton

1995-01-01T23:59:59.000Z

117

The Role of Cloud Microphysics Parameterization in the Simulation of Mesoscale Convective System Clouds and Precipitation in the Tropical Western Pacific  

Science Conference Proceedings (OSTI)

This paper presents a detailed analysis of convection-permitting cloud simulations, aimed at increasing the understanding of the role of parameterized cloud microphysics in the simulation of mesoscale convective systems (MCSs) in the tropical ...

K. Van Weverberg; A. M. Vogelmann; W. Lin; E. P. Luke; A. Cialella; P. Minnis; M. Khaiyer; E. R. Boer; M. P. Jensen

2013-04-01T23:59:59.000Z

118

Effects of Downdrafts and Mesoscale Convective Organization on the Heat and Moisture Budgets of Tropical Cloud Clusters. Part I: A Diagnostic Cumulus Ensemble Model  

Science Conference Proceedings (OSTI)

A diagnostic cumulus ensemble model is developed to study the effects of convective-scale downdrafts and mesoscale convective organization on the heat and moisture budgets of tropical cloud clusters. The model adopts the spectral representation ...

Ming-Dean Cheng

1989-06-01T23:59:59.000Z

119

Effects of Downdrafts and Mesoscale Convective Organization on the Heat and Moisture Budgets of Tropical Cloud Clusters. Part II: Effects of Convective-Scale Downdrafts  

Science Conference Proceedings (OSTI)

The diagnostic cumulus ensemble model presented in Part I of this paper is applied to the data taken during Phase III of the GARP Tropical Atlantic Experiment (GATE) to examine the effects of convective-scale downdrafts on the large-scale heat ...

Ming-Dean Cheng

1989-06-01T23:59:59.000Z

120

The Vertical Structure of Tropical Convection and Its Impact on the Budgets of Water Vapor and Ozone  

Science Conference Proceedings (OSTI)

Convective clouds in the Tropics that penetrate the boundary layer inversion preferentially detrain into a shallow outflow layer (2–5 km) or a deep outflow layer (10–17 km). The properties of these layers are diagnosed from a one-dimensional ...

Ian Folkins; Randall V. Martin

2005-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Latitudinal Variations of the Convective Source and Propagation Condition of Inertio-Gravity Waves in the Tropics  

Science Conference Proceedings (OSTI)

Latitudinal variations of the convective source and vertical propagation condition of inertio-gravity waves (IGWs) in the tropical region (30°S–30°N) are examined using high-resolution Global Cloud Imagery (GCI) and 6-hourly NCEP–NCAR reanalysis ...

Hye-Yeong Chun; Jung-Suk Goh; In-Sun Song; Lucrezia Ricciardulli

2007-05-01T23:59:59.000Z

122

Changes in the Interaction between Tropical Convection, Radiation, and the Large-Scale Circulation in a Warming Environment  

Science Conference Proceedings (OSTI)

This paper explores the response of the tropical hydrologic cycle to surface warming through the lens of large-domain cloud-system-resolving model experiments run in a radiative–convective equilibrium framework. Simulations are run for 55 days and ...

Derek J. Posselt; Susan van den Heever; Graeme Stephens; Matthew R. Igel

2012-01-01T23:59:59.000Z

123

Characteristics of Rain Integral Parameters during Tropical Convective, Transition, and Stratiform Rain at Gadanki and Its Application in Rain Retrieval  

Science Conference Proceedings (OSTI)

In the present study the characteristics of rain integral parameters during tropical convective (C), transition (T), and stratiform (S) types of rain are studied with the help of Joss–Waldvogel disdrometer (JWD), L-band, and very-high-frequency ...

Sanjay Sharma; Mahen Konwar; Diganta Kumar Sarma; M. C. R. Kalapureddy; A. R. Jain

2009-06-01T23:59:59.000Z

124

Relationships between Tropical Cyclone Intensity and Satellite-Based Indicators of Inner Core Convection: 85-GHz Ice-Scattering Signature and Lightning  

Science Conference Proceedings (OSTI)

A key component in the maintenance and intensification of tropical cyclones is the transverse circulation, which transports mass and momentum and provides latent heat release via inner core convective updrafts. This study examines these updrafts ...

Daniel J. Cecil; Edward J. Zipser

1999-01-01T23:59:59.000Z

125

High-Resolution Simulation of Mean Convection and Its Intraseasonal Variability over the Tropics in the MRI/JMA 20-km Mesh AGCM  

Science Conference Proceedings (OSTI)

Tropical mean convection and its organization on different spatiotemporal scales in a simulation using the Meteorological Research Institute/Japan Meteorological Agency (MRI/JMA) global atmospheric general circulation model (AGCM) at 20-km ...

K. Rajendran; A. Kitoh; R. Mizuta; S. Sajani; T. Nakazawa

2008-08-01T23:59:59.000Z

126

Diurnal Cycle of Shallow and Deep Convection for a Tropical Land and an Ocean Environment and Its Relationship to Synoptic Wind Regimes  

Science Conference Proceedings (OSTI)

The characteristics of shallow and deep convection during the Tropical Rainfall Measuring Mission/Large-Scale Biosphere–Atmosphere Experiment in Amazonia (TRMM/LBA) and the Eastern Pacific Investigation of Climate Processes in the Coupled Ocean–...

L. Gustavo Pereira; Steven A. Rutledge

2006-10-01T23:59:59.000Z

127

United Mechanisms for the Generation of Low- and High-Frequency Tropical Waves. Part I: Control Experiments with Moist Convective Adjustment  

Science Conference Proceedings (OSTI)

To examine several mechanisms for the generation of low- and high-frequency tropical waves, numerical experiments are conducted using an idealized nine-level R21 spectral model with the original scheme of moist convective adjustment (MCA). The ...

Y. Hayashi; D. G. Golder

1997-05-01T23:59:59.000Z

128

Evaluation of Hydrometeor Phase and Ice Properties in Cloud-Resolving Model Simulations of Tropical Deep Convection Using Radiance and Polarization Measurements  

Science Conference Proceedings (OSTI)

Satellite measurements are used to evaluate the glaciation, particle shape, and effective radius in cloud-resolving model simulations of tropical deep convection. Multidirectional polarized reflectances constrain the ice crystal geometry and the ...

Bastiaan van Diedenhoven; Ann M. Fridlind; Andrew S. Ackerman; Brian Cairns

2012-11-01T23:59:59.000Z

129

A Numerical Study of Three-Dimensional Gravity Waves Triggered by Deep Tropical Convection and Their Role in the Dynamics of the QBO  

Science Conference Proceedings (OSTI)

A 3D mesoscale model is used to study the structure of convectively triggered gravity waves in the Tropics and their role in the dynamics of the middle atmosphere. Simulations with three stratospheric background zonal wind cases are examined. In ...

C. Piani; D. Durran; M. J. Alexander; J. R. Holton

2000-11-01T23:59:59.000Z

130

Tropical cyclone size in observations and in radiative-convective equilibrium  

E-Print Network (OSTI)

Tropical cyclone size remains an unsolved problem in tropical meteorology, yet size plays a significant role in the damage caused by tropical cyclones due to wind, storm surge, and inland freshwater flooding. This work ...

Chavas, Daniel Robert

2013-01-01T23:59:59.000Z

131

Tropical Island Convection in the Absence of Significant Topography. Part I: Life Cycle of Diurnally Forced Convection  

Science Conference Proceedings (OSTI)

Diurnally forced convection was observed over the Tiwi Islands, north of the Australian continent, as part of the Maritime Continent Thunderstorm Experiment. Immature peninsula-scale (5–15 km) sea breezes were observed to initiate moist ...

R. E. Carbone; J. W. Wilson; T. D. Keenan; J. M. Hacker

2000-10-01T23:59:59.000Z

132

Radar Analysis of a Tropical Convective Boundary Layer with Shallow Cumulus Clouds  

Science Conference Proceedings (OSTI)

A situation of fair weather cloudy convection is examined using a dual Doppler radar, environmental measurements and cloud photogrammetry. The convective layer is characterized by the interaction between the northward monsoon wind at low levels ...

Laurence Eymard

1984-04-01T23:59:59.000Z

133

The Relationship between Satellite Measured Convective Bursts and Tropical Cyclone Intensification  

Science Conference Proceedings (OSTI)

The relationship between the mean temperature of the top of the cloud canopies and the future maximum winds of Atlantic Ocean tropical cyclones is analyzed. The area-average cloud top temperatures from 309 observations of 12 tropical cyclones ...

Joseph Steranka; Edward B. Rodgers; R. Cecil Gentry

1986-08-01T23:59:59.000Z

134

Wavelet Analysis of Simulated Tropical Convective Cloud Systems. Part I: Basic Analysis  

Science Conference Proceedings (OSTI)

A wavelet analysis of a three-dimensional 7-day explicit simulation of the tropical cloud systems in the Global Atmosphere Research Programme (GARP) Atlantic Tropical Experiment Phase III is performed. Three physically distinct regimes (squall ...

Jun-Ichi Yano; Mitchell W. Moncrieff; Xiaoqing Wu; Michio Yamada

2001-04-01T23:59:59.000Z

135

Links between Tropical Convection and Variations of the Extratropical Circulation during TOGA COARE  

Science Conference Proceedings (OSTI)

Data from the Intensive Observation Period of the Tropical Ocean Global Atmosphere Coupled Ocean-Atmosphere Response Experiment (November 1992–February 1993) have been used to investigate the links between intraseasonal variations in tropical ...

Greg C. Tyrrell; David J. Karoly; John L. McBride

1996-09-01T23:59:59.000Z

136

The Effects of Vertical Wind Shear on the Distribution of Convection in Tropical Cyclones  

Science Conference Proceedings (OSTI)

The influence of vertical wind shear on the azimuthal distribution of cloud-to-ground lightning in tropical cyclones was examined using flash locations from the National Lightning Detection Network. The study covers 35 Atlantic basin tropical ...

Kristen L. Corbosiero; John Molinari

2002-08-01T23:59:59.000Z

137

Relationships between tropical cyclone intensity and satellite based indicators of inner core convection: 85 GHz ice scattering signature and lightning  

E-Print Network (OSTI)

A key component in the maintenance and intensification of tropical cyclones is the transverse circulation, which transports mass and momentum and provides latent heat release via inner core convective updrafts. This study examines these updrafts indirectly, using satellite-borne observations of the scattering of upwelling microwave radiation by precipitation sized ice and satellite-borne observations of lightning. The observations are then compared to tropical cyclone intensity and the resulting relationships are assessed. The size of ice particles is tied to updraft strength, in that stronger updrafts produce more supercooled liquid water, leading to larger graupel through riming. Large graupel and a high supercooled liquid water content are necessary ingredients for charge separation, leading to lightning. Various parameters derived from the inner core ice scattering signature are computed for regions encircling hurricanes and typhoons, and observations of lightning activity or inactivity are analyzed. As expected, increasing ice scattering signature is found to correspond to increasing tropical cyclone intensity. However, the highest correlations do not involve indicators of convective intensity, as they were expected to. Instead, the highest correlations with tropical cyclone intensity result from the ice scattering signature parameters most closely associated with the areal extent of at least moderate precipitation rates. Correlations tend to be of the same sign for both present cyclone intensity at the time of the satellite overpass and subsequent intensity change. Correlations are higher for future cyclone intensity than for either of these. These correlations are much higher for the Atlantic and the Eastern North Pacific than for the Western North Pacific. It is hypothesized that processes involved with the most intense or rapidly intensifying tropical cyclones (more commonly found in the Western North Pacific) are responsible for these differences. The lightning observations are more limited than the microwave observations, because the short amount of time in which lightning can be detected may not adequately represent a particular storms electrical activity. These observations reveal no clear relationships between electrical activity and tropical cyclone intensity. In the examination of case studies, the paradoxical situation of much greater lightning activity in rainbands than in eyewalls is noted.

Cecil, Daniel Joseph

1997-01-01T23:59:59.000Z

138

Numerical Simulation of Episodes of Organized Convection in Tropical Northern Africa  

Science Conference Proceedings (OSTI)

A large-domain convection-permitting numerical model is used to simulate episodes of deep convection, which are generated during the day over the Ethiopian Highlands and then propagate westward over the eastern and central Sahel region (5°–20°N) ...

Arlene G. Laing; Stanley B. Trier; Christopher A. Davis

2012-09-01T23:59:59.000Z

139

Convectively Coupled Kelvin Waves over Tropical Africa during the Boreal Summer: Structure and Variability  

Science Conference Proceedings (OSTI)

The structure and variability of convectively coupled Kelvin waves during the boreal summer are explored using satellite-observed brightness temperature data and ECMWF reanalyses. Kelvin wave activity is most prominent between the central and ...

Ademe Mekonnen; Chris D. Thorncroft; Anantha R. Aiyyer; George N. Kiladis

2008-12-01T23:59:59.000Z

140

Development of Convective Systems over Baja California during Tropical Cyclone Linda (2003)  

Science Conference Proceedings (OSTI)

Characteristics of the life cycle and motion of convective systems that occurred over the Baja California Peninsula were determined from a case study in September of 2003. This note applies data from satellite imagery, regular observations from ...

Luis M. Farfán

2005-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Tropical Convection on 7–21-Day Timescales over the Western Pacific  

Science Conference Proceedings (OSTI)

Evidence is presented to demonstrate that the oscillations of convection on 7–21-day timescales are an important component of the intraseasonal variability over the region spanning the equatorial western Pacific to the subtropical South Pacific. ...

Jon M. Schrage; Dayton G. Vincent

1996-03-01T23:59:59.000Z

142

The Pacific–South American Modes and Tropical Convection during the Southern Hemisphere Winter  

Science Conference Proceedings (OSTI)

Atmospheric circulation features and convection patterns associated with two leading low-frequency modes in the Southern Hemisphere (SH) are examined in multiyear global reanalyses produced by NCEP–NCAR and NASA–DAO. The two leading modes, ...

Kingtse C. Mo; R. Wayne Higgins

1998-06-01T23:59:59.000Z

143

Sensitivity of Tropical Convection to Sea Surface Temperature in the Absence of Large-Scale Flow  

Science Conference Proceedings (OSTI)

The response of convection to changing sea surface temperature (SST) in the absence of large-scale flow is examined, using a three-dimensional cloud resolving model. The model includes a five-category bulk microphysical scheme representing snow, ...

Adrian M. Tompkins; George C. Craig

1999-02-01T23:59:59.000Z

144

Statistical Assessment of Tropical Convection-Permitting Model Simulations Using a Cell-Tracking Algorithm  

Science Conference Proceedings (OSTI)

This study presents a method for comparing convection-permitting model simulations to radar observations using an innovative object-based approach. The method uses the automated cell-tracking algorithm, Thunderstorm Identification Tracking ...

Simon Caine; Todd P. Lane; Peter T. May; Christian Jakob; Steven T. Siems; Michael J. Manton; James Pinto

2013-02-01T23:59:59.000Z

145

Indo-Pacific Sea Surface Temperature Perturbations Associated with Intraseasonal Oscillations of Tropical Convection  

Science Conference Proceedings (OSTI)

Since the ISV of the convection is an intermittent phenomenon, the local mode analysis (LMA) technique is used to detect only the ensemble of intraseasonal events that are well organized at large scale. The LMA technique is further developed in ...

Jean Philippe Duvel; Jérôme Vialard

2007-07-01T23:59:59.000Z

146

A Three-Dimensional Simulation of a Tropical Squall Line: Convective Organization and Thermodynamic Vertical Transport  

Science Conference Proceedings (OSTI)

Three-dimensional convective-scale simulations of an African squall line, observed during the French COPT 81 experiment, are presented. Three simulations with different representations of large-scale forcing are performed on a domain of 50 km (...

Jean-Luc Redelsperger; Jean-Philippe Lafore

1988-04-01T23:59:59.000Z

147

Conserved Variable Analysis of the Convective Boundary Layer Thermodynamic Structure over the Tropical Oceans  

Science Conference Proceedings (OSTI)

An analysis of FGGE dropwindsonde data using conserved thermodynamic variables shows mixing line structures for the convective boundary layer over the equatorial Pacific. Deeper boundary layers show a double structure. Reversals of the gradients ...

Alan K. Betts; Bruce A. Albrecht

1987-01-01T23:59:59.000Z

148

Tropical Cumulus Convection and Upward-Propagating Waves in Middle-Atmospheric GCMs  

Science Conference Proceedings (OSTI)

It is recognized that the resolved tropical wave spectrum can vary considerably among general circulation models (GCMs) and that these differences can have an important impact on the simulated climate. A comprehensive comparison of low-latitude ...

T. Horinouchi; S. Pawson; K. Shibata; U. Langematz; E. Manzini; M. A. Giorgetta; F. Sassi; R. J. Wilson; K. Hamilton; J. de Grandpré; A. A. Scaife

2003-11-01T23:59:59.000Z

149

Observations of Lightning in Convective Supercells within Tropical Storms and Hurricanes  

Science Conference Proceedings (OSTI)

Cloud-to-ground (CG) lightning observations from land-based lightning detection networks now allow monitoring this component of the electrical structure of tropical storms and hurricanes within a few hundred kilometers of the United States ...

Walter A. Lyons; Cecil S. Keen

1994-08-01T23:59:59.000Z

150

Satellite Observations of Variations in Tropical Cyclone Convection Caused by Upper-Tropospheric Troughs  

Science Conference Proceedings (OSTI)

The mutual adjustment between upper-tropospheric troughs and the structure of western Atlantic Tropical Cyclones Florence (1988) and Irene (1981) are analyzed using satellite and in situ data. Satellite-observed tracers (e.g., cirrus clouds, ...

Edward B. Rodgers; Simon W. Chang; John Stout; Joseph Steranka; Jainn-Jong Shi

1991-08-01T23:59:59.000Z

151

The Effect of Environmental Conditions on Tropical Deep Convective Systems Observed from the TRMM Satellite  

Science Conference Proceedings (OSTI)

This study uses measurements of radiation and cloud properties taken between January and August 1998 by three Tropical Rainfall Measuring Mission (TRMM) instruments, the Clouds and the Earth’s Radiant Energy System (CERES) scanner, the TRMM ...

Bing Lin; Bruce A. Wielicki; Patrick Minnis; Lin Chambers; Kuan-Man Xu; Yongxiang Hu; Alice Fan

2006-11-01T23:59:59.000Z

152

SCOUT-O3/ACTIVE: High-altitude Aircraft Measurements around Deep Tropical Convection  

Science Conference Proceedings (OSTI)

During November and December 2005, two consortia of mainly European groups conducted an aircraft campaign in Darwin, Australia, to measure the composition of the tropical upper-troposphere and tropopause regions, between 12 and 20 km, in order to ...

G. Vaughan; K. Bower; C. Schiller; A. R. MacKenzie; T. Peter; H. Schlager; N. R. P. Harris; P. T. May

2008-05-01T23:59:59.000Z

153

Convective Coupling and Interannual and Intraseasonal Coupled Variabilities in the Tropics  

Science Conference Proceedings (OSTI)

Recent analyses point at close structural similarities and intimate dynamical connections among the members of a wide spectrum of variabilities in the global Tropics. This suggests that these oscillations with widely different timescales may have ...

P. Goswami; Rameshan K.

2000-08-01T23:59:59.000Z

154

Lagrangian Diagnostics of Tropical Deep Convection and Its Effect upon Upper-Tropospheric Humidity  

Science Conference Proceedings (OSTI)

This study combines geostationary water vapor imagery with optical cloud property retrievals and microwave sea surface observations in order to investigate, in a Lagrangian framework, (i) the importance of cirrus anvil sublimation on tropical ...

Ákos Horváth; Brian J. Soden

2008-03-01T23:59:59.000Z

155

Improvements of an Ice-Phase Microphysics Parameterization for Use in Numerical Simulations of Tropical Convection  

Science Conference Proceedings (OSTI)

It is important to properly simulate the extent and ice water content of tropical anvil clouds in numerical models that explicitly include cloud formation because of the significant effects that these clouds have on the radiation budget. For this ...

Steven K. Krueger; Qiang Fu; K. N. Liou; Hung-Neng S. Chin

1995-01-01T23:59:59.000Z

156

Evidence from Tropical Raindrop Spectra of the Origin of Rain from Stratiform versus Convective Clouds  

Science Conference Proceedings (OSTI)

An analysis of temporal variations in gamma parameters of raindrop spectra is presented utilizing surface-based observations from the Tropical Ocean Global Atmosphere Couple Ocean-Atmosphere Experiment. An observed dramatic change in the N0 ...

Ali Tokay; David A. Short

1996-03-01T23:59:59.000Z

157

The Tilt of the Leading Edge of Mesoscale Tropical Convective Lines  

Science Conference Proceedings (OSTI)

The tilt with height of the leading edge of seven mesoscale convective lines in GATE is determined by two independent methods. When averaged over time and along the line axis, the tilt is found to he surprisingly shallow, between 20 and 35 ...

M. A. LeMone; G. M. Barnes; E. J. Szoke; E. J. Zipser

1984-03-01T23:59:59.000Z

158

How Do Atmosphere and Land Surface Influence Seasonal Changes of Convection in the Tropical Amazon?  

Science Conference Proceedings (OSTI)

Although the wet season in the tropical Amazon (10°N–20°S) at any one place and in any one year is initiated rapidly by synoptic systems, large-scale thermodynamic conditions modulate the frequency and intensity of these synoptic systems and ...

Rong Fu; Bin Zhu; Robert E. Dickinson

1999-05-01T23:59:59.000Z

159

Rapid Scan Views of Convectively Generated Mesovortices in Sheared Tropical Cyclone Gustav (2002)  

Science Conference Proceedings (OSTI)

On 9–10 September 2002, multiple mesovortices were captured in great detail by rapid scan visible satellite imagery in subtropical, then later, Tropical Storm Gustav. These mesovortices were observed as low-level cloud swirls while the low-level ...

Eric A. Hendricks; Michael T. Montgomery

2006-12-01T23:59:59.000Z

160

Global Distribution of Tropical Deep Convection: Different Perspectives from TRMM Infrared and Radar Data  

Science Conference Proceedings (OSTI)

Cold cloud features (CCFs) are defined by grouping six full years of Tropical Rainfall Measuring Mission (TRMM) infrared pixels with brightness temperature at 10.8-?m wavelength (TB11) less than or equal to 210 and 235 K. Then the precipitation ...

Chuntao Liu; Edward J. Zipser; Stephen W. Nesbitt

2007-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Atlantic Tropical Cyclogenesis: A Three-Way Interaction between an African Easterly Wave, Diurnally Varying Convection, and a Convectively Coupled Atmospheric Kelvin Wave  

Science Conference Proceedings (OSTI)

This paper explores a three-way interaction between an African easterly wave (AEW), the diurnal cycle of convection over the Guinea Highlands (GHs), and a convectively coupled atmospheric equatorial Kelvin wave (CCKW). These interactions resulted ...

Michael J. Ventrice; Christopher D. Thorncroft; Matthew A. Janiga

2012-04-01T23:59:59.000Z

162

Deep Convective Systems Observed by A-Train in the Tropical Indo-Pacific Region Affected by the MJO  

Science Conference Proceedings (OSTI)

In the Indo-Pacific region, mesoscale convective systems (MCSs) occur in a pattern consistent with the eastward propagation of the large-scale convective envelope of the Madden–Julian oscillation (MJO). MCSs are major contributors to the total ...

Jian Yuan; Robert A. Houze Jr.

2013-02-01T23:59:59.000Z

163

Multiscale Convective Organization and the YOTC Virtual Global Field Campaign  

Science Conference Proceedings (OSTI)

The Year of Tropical Convection (YOTC) project recognizes that major improvements are needed in how the tropics are represented in climate models. Tropical convection is organized into multiscale precipitation systems with an underlying chaotic order. ...

Mitchell W. Moncrieff; Duane E. Waliser; Martin J. Miller; Melvyn A. Shapiro; Ghassem R. Asrar; James Caughey

2012-08-01T23:59:59.000Z

164

Tropical-Extratropical Teleconnections during the Northern Hemisphere Winter. Part II: Relationships between Monthly Mean Northern Hemisphere Circulation Patterns and Proxies for Tropical Convection  

Science Conference Proceedings (OSTI)

Monthly mean teleconnections during the northern winter between proxies for tropical heating (OLR and SST data) and Northern Hemisphere 700 mb circulation patterns (PNA, TNH, and WPO) are examined, principally with correlation analysis. In ...

Robert E. Livezey; Kingtse C. Mo

1987-12-01T23:59:59.000Z

165

The Transition to Strong Convection  

Science Conference Proceedings (OSTI)

Recent work has shown that observations of tropical precipitation conform to properties associated with critical phenomena in other systems. Here some of these universal properties are used to probe the physics of tropical convection empirically, ...

J. David Neelin; Ole Peters; Katrina Hales

2009-08-01T23:59:59.000Z

166

12.811 Tropical Meteorology, Spring 2005  

E-Print Network (OSTI)

This course describes the behavior and dynamics of the tropical troposphere, from the large-scale energy balance down to cumulus convection and tropical cyclones. Topics include: Radiative-convective equilibrium; the Hadley ...

Emanuel, Kerry

167

Distribution of Tropical Tropospheric Water Vapor  

Science Conference Proceedings (OSTI)

Utilizing a conceptual model for tropical convection and observational data for water vapor, the maintenance of the vertical distribution of the tropical tropospheric water vapor is discussed. While deep convection induces large-scale subsidence ...

De-Zheng Sun; Richard S. Lindzen

1993-06-01T23:59:59.000Z

168

Convective Entrainment and Large-Scale Organization of Tropical Precipitation: Sensitivity of the CNRM-CM5 Hierarchy of Models  

Science Conference Proceedings (OSTI)

The spurious double intertropical convergence zone (ITCZ) is a systematic bias affecting state-of-the-art coupled general circulation models (GCMs). Modeling studies show that the ITCZ structure is very sensitive to moist convection ...

Boutheina Oueslati; Gilles Bellon

2013-05-01T23:59:59.000Z

169

Toward an understanding of vertical momentum transports in cloud system resolving model simulations of multiscale tropical convection  

Science Conference Proceedings (OSTI)

This study examines the characteristics of convective momentum transport (CMT) and gravity wave momentum transport (GWMT) in two-dimensional cloud-system resolving model simulations, including the relationships between the two transports. A linear ...

Tiffany A. Shaw; Todd P. Lane

170

A Composite Life Cycle of Nonsquall Mesoscale Convective Systems over the Tropical Ocean. Part I: Kinematic Fields  

Science Conference Proceedings (OSTI)

The wind fields associated with cloud clusters observed during the Global Atmospheric Research Program's Atlantic Tropical Experiment (GATE) are investigated. A compositing procedure is devised to isolate the cluster circulations. Satellite-...

Edward I. Tollerud; Steven K. Esbensen

1985-04-01T23:59:59.000Z

171

A Composite Life Cycle of Nonsquall Mesoscale Convective Systems over the Tropical Ocean. Part II: Heat and Moisture Budgets  

Science Conference Proceedings (OSTI)

The heat and moisture budgets associated with five large nonsquall cloud clusters observed during Phase 3 of the Global Atmospheric Research Program's Atlantic Tropical Experiment (GATE) are investigated. The input data for the budget ...

Steven K. Esbensen; Jough-Tai Wang; Edward I. Tollerud

1988-02-01T23:59:59.000Z

172

Mesoscale Convective Systems Defined by Their 85-GHz Ice Scattering Signature: Size and Intensity Comparison over Tropical Oceans and Continents  

Science Conference Proceedings (OSTI)

This study used the 85-GHz ice scattering signature to describe the size, intensity, and geographic distribution of mesoscale convective systems (MCSs) between 35°N and 35°S for January, April, July, and October 1993. An MCS was defined as an ...

Karen I. Mohr; Edward J. Zipser

1996-11-01T23:59:59.000Z

173

Visiting Fermilab  

NLE Websites -- All DOE Office Websites (Extended Search)

Hours, Directions and Maps Hours, Directions and Maps Current Status of Access to Fermilab Hours Fermilab's site is open to the public every day of the week from 8:00 a.m. to 6:00 p.m. from November to March and from 8:00 a.m. to 8:00 p.m. the rest of the year. Fermilab visitors are allowed to visit two buildings on their own: the first and ground floor of Wilson Hall and the Lederman Science Center, which is open Monday-Friday 8:30 a.m. - 4:30 p.m. and on Saturday from 9:00 a.m. to 3:00 p.m. (Please call (630)840-8258 to check on holiday hours or check the Lederman Science Center website. Groups of six or more must book a visit by calling the Center.) A map of Fermilab's Public Areas is available online. How to enter Fermilab Visitors may enter Fermilab through the Pine Street entrance in Batavia, Ill., or the Batavia Road entrance in Warrenville, Ill. Delivery trucks need to use the Wilson Street entrance in Batavia. After presenting a valid photo id and telling the security officer the purpose of their visit, most visitors will simply pass through the security checkpoint. Roadways that are off limits to visiting members of the public are posted with signs, and motorists can ask at the site entrances for maps to guide them to the public areas.

174

Parameterization of Convective Effects on the Momentum and Vorticity Budgets of Synoptic-Scale Atlantic Tropical Waves  

Science Conference Proceedings (OSTI)

Dynamic budgets of an average synoptic-scale wave have been made by Stevens (1979) from GARP Atlantic Tropical Experiment Phase III B- and A/B-scale data composited by Thompson et al. (1979). In the present study the apparent sources of momentum ...

Lloyd J. Shapiro; Duane E. Stevens

1980-11-01T23:59:59.000Z

175

Convective Contribution to the Genesis of Hurricane Ophelia (2005)  

Science Conference Proceedings (OSTI)

The convection occurring in the tropical depression that became Hurricane Ophelia (2005) was investigated just prior to tropical storm formation. Doppler radar showed a deep, wide, intense convective cell of a type that has been previously ...

Robert A. Houze Jr.; Wen-Chau Lee; Michael M. Bell

2009-09-01T23:59:59.000Z

176

ARM tropical pacific experiment (ATPEX): Role of cloud, water vapor and convection feedbacks in the coupled ocean/atmosphere system  

SciTech Connect

We have initiated studies that include radiation model validation, improved treatment of the three-dimensional structure of cloud-radiation interactions, and sensitivity runs that will unravel the role of cloud-convection-radiation interactions in the Pacific Sear Surface Temperatures and the overlying Walker and Hadley circulation. The research program is divided into three phases: (1) radiation, (2) cloud parameterization issues; (3) feedback and ocean-atmosphere interactions.

Ramanathan, V.; Barnett, T.P.

1992-03-05T23:59:59.000Z

177

Convectively Coupled Waves in a Sheared Environment  

Science Conference Proceedings (OSTI)

A linear stability analysis, about a radiative–convective equilibrium in a sheared environment, on an equatorial beta plane, for a simple multicloud model for organized tropical convection is presented here. Both vertical/baroclinic and ...

Ying Han; Boualem Khouider

2010-09-01T23:59:59.000Z

178

A Model for Transport across the Tropical Tropopause  

Science Conference Proceedings (OSTI)

A model of convective and advective transport across the tropical tropopause is described. In this model overshooting convective turrets inject dehydrated tropospheric air into a tropical “tropopause layer” (TTL) bounded approximately by the 50- ...

Steven C. Sherwood; Andrew E. Dessler

2001-04-01T23:59:59.000Z

179

Clouds in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Clouds within the inner regions of tropical cyclones are unlike those anywhere else in the atmosphere. Convective clouds contributing to cyclogenesis have rotational and deep intense updrafts but tend to have relatively weak downdrafts. Within ...

Robert A. Houze Jr.

2010-02-01T23:59:59.000Z

180

Clouds in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Clouds within the inner regions of tropical cyclones are unlike those anywhere else in the atmosphere. Convective clouds contributing to cyclogenesis have rotational and deep intense updrafts but tend to have relatively weak downdrafts. Within the ...

Robert A. Houze Jr.

2010-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

A Radar and Electrical Study of Tropical “Hot Towers”  

Science Conference Proceedings (OSTI)

Radar and electrical measurements for deep tropical convection are examined for both “break period” and “monsoonal” regimes in the vicinity of Darwin, Australia. Break period convection consists primarily of deep continental convection, whereas ...

E. R. Williams; S. G. Geotis; N. Renno; S. A. Rutledge; E. Rasmussen; T. Rickenbach

1992-08-01T23:59:59.000Z

182

Association of Tropical Cirrus in the 10–15-km Layer with Deep Convective Sources: An Observational Study Combining Millimeter Radar Data and Satellite-Derived Trajectories  

Science Conference Proceedings (OSTI)

In this paper, millimeter cloud radar (MMCR) and Geosynchronous Meteorological Satellite (GMS) data are combined to study the properties of tropical cirrus that are common in the 10–15-km layer of the tropical troposphere in the western Pacific. ...

Gerald G. Mace; Min Deng; Brian Soden; Ed Zipser

2006-02-01T23:59:59.000Z

183

Prediction and Diagnosis of Tropical Cyclone Formation in an NWP System. Part I: The Critical Role of Vortex Enhancement in Deep Convection  

Science Conference Proceedings (OSTI)

This is the first of a three-part investigation into tropical cyclone (TC) genesis in the Australian Bureau of Meteorology’s Tropical Cyclone Limited Area Prediction System (TC-LAPS), an operational numerical weather prediction (NWP) forecast ...

K. J. Tory; M. T. Montgomery; N. E. Davidson

2006-12-01T23:59:59.000Z

184

Ten Years of Measurements of Tropical Upper-Tropospheric Water Vapor by MOZAIC. Part I: Climatology, Variability, Transport, and Relation to Deep Convection  

Science Conference Proceedings (OSTI)

Ten years (1994–2004) of measurements of tropical upper-tropospheric water vapor (UTWV) by the Measurement of Ozone and Water Vapor by Airbus In-Service Aircraft (MOZAIC) are investigated over three regions—the tropical Atlantic, tropical Africa, ...

Zhengzhao Luo; Dieter Kley; Richard H. Johnson; Herman Smit

2007-02-01T23:59:59.000Z

185

Polarization diversity for millimeter space-borne Doppler radars: an answer for observing deep convection?  

Science Conference Proceedings (OSTI)

Spaceborne Doppler radars have the potential to provide key missing observations of convective vertical air motions especially over the tropical oceans. Such measurements can improve our understanding of the role of tropical convection in vertical ...

Alessandro Battaglia; Simone Tanelli; Pavlos Kollias

186

Effect of Tropical Waves on the Tropical Tropopause Transition Layer Upwelling  

Science Conference Proceedings (OSTI)

An initial-value problem is employed with a GCM to investigate the role of the convectively driven Rossby and Kelvin waves for tropopause transition layer (TTL) upwelling in the tropics. The convective heating is mimicked with a prescribed ...

Jung-Hee Ryu; Sukyoung Lee

2010-10-01T23:59:59.000Z

187

An Objective Algorithm for Detecting and Tracking Tropical Cloud Clusters: Implications for Tropical Cyclogenesis Prediction  

Science Conference Proceedings (OSTI)

An algorithm to detect and track global tropical cloud clusters (TCCs) is presented. TCCs are organized large areas of convection that form over warm tropical waters. TCCs are important because they are the “seedlings” that can evolve into ...

Christopher C. Hennon; Charles N. Helms; Kenneth R. Knapp; Amanda R. Bowen

2011-08-01T23:59:59.000Z

188

Characterization of Momentum Transport Associated with Organized Moist Convection and Gravity Waves  

Science Conference Proceedings (OSTI)

Tropical convection is inherently multiscalar, involving complex fields of clouds and various regimes of convective organization ranging from small disorganized cumulus up to large organized convective clusters. In addition to being a crucial ...

Todd P. Lane; Mitchell W. Moncrieff

2010-10-01T23:59:59.000Z

189

Orogenic Convection in Subtropical South America as Seen by the TRMM Satellite  

Science Conference Proceedings (OSTI)

Extreme orogenic convective storms in southeastern South America are divided into three categories: storms with deep convective cores, storms with wide convective cores, and storms containing broad stratiform regions. Data from the Tropical ...

Kristen L. Rasmussen; Robert A. Houze Jr.

2011-08-01T23:59:59.000Z

190

The Importance of Three Physical Processes in a Minimal Three-Dimensional Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

The minimal three-dimensional tropical cyclone model developed by Zhu et al. is used to explore the role of shallow convection, precipitation-cooled downdrafts, and the vertical transport of momentum by deep convection on the dynamics of tropical ...

Hongyan Zhu; Roger K. Smith

2002-06-01T23:59:59.000Z

191

Convection in TOGA COARE: Horizontal Scale, Morphology, and Rainfall Production  

Science Conference Proceedings (OSTI)

The occurrence frequency and rainfall production of mesoscale convective systems (MCSs) relative to smaller groups of convective clouds over the tropical oceans is not well known. Eighty days of shipboard radar data collected during the recent ...

Thomas M. Rickenbach; Steven A. Rutledge

1998-09-01T23:59:59.000Z

192

Regulation of Moist Convection over the West Pacific Warm Pool  

Science Conference Proceedings (OSTI)

The mechanisms that regulate moist convection over the warm tropical oceans are not well understood. One school of thought holds that convection is caused by the convergence of moisture, which in turn is produced by an independent dynamical ...

David J. Raymond

1995-11-01T23:59:59.000Z

193

Resonant Response of Deep Convection to Surface Hot Spots  

Science Conference Proceedings (OSTI)

Observations show substantial variations of the intensity of tropical and/or summertime deep convection on land that are not explained by standard measures of convective instability. One feature that distinguishes land surfaces is their ...

F. J. Robinson; S. C. Sherwood; Y. Li

2008-01-01T23:59:59.000Z

194

Physics of Greenhouse Effect and Convection in Warm Oceans  

Science Conference Proceedings (OSTI)

Sea surface temperature (SST) in roughly 50% of the tropical Pacific Ocean is warm enough (SST > 300 K) to permit deep convection. This paper examines the effects of deep convection on the climatological mean vertical distributions of water vapor ...

A. K. Inamdar; V. Ramanathan

1994-05-01T23:59:59.000Z

195

Analysis of Convection and Its Association with African Easterly Waves  

Science Conference Proceedings (OSTI)

The association between convection and African easterly wave (AEW) activity over tropical Africa and the tropical Atlantic during the boreal summer is examined using satellite brightness temperature (TB) and ECMWF reanalysis datasets. Spectral ...

Ademe Mekonnen; Chris D. Thorncroft; Anantha R. Aiyyer

2006-10-01T23:59:59.000Z

196

Microphysical Observations of Tropical Clouds  

Science Conference Proceedings (OSTI)

The results from airborne in situ sampling of convective tropical storms in the Amazon and Kwajalein are presented. Three cases from the Amazon and two from Kwajalein are compared and provide examples of the much larger dataset that was obtained ...

Jeffrey L. Stith; James E. Dye; Aaron Bansemer; Andrew J. Heymsfield; Cedric A. Grainger; Walter A. Petersen; Robert Cifelli

2002-02-01T23:59:59.000Z

197

COPT 81: A Field Experiment Designed for the Study of Dynamics and Electrical Activity of Deep Convection in Continental Tropical Regions  

Science Conference Proceedings (OSTI)

During May and June 1981 several French research organizations, the University of Abidjan (Ivory coast) and the Agency for security of Aeronautical Navigation (ASECNA), participated in the observational field program called “Convection Profonde ...

Gilles Sommeria; J. Testud

1984-01-01T23:59:59.000Z

198

Parameter study of tropical cyclones in rotating radiative-convective equilibrium with column physics and resolution of a 25 km GCM  

Science Conference Proceedings (OSTI)

Rotating radiative-convective equilibrium is studied by extracting the column physics of a meso-scale resolution global atmospheric model that simulates realistic hurricane frequency statistics and coupling it to rotating hydrostatic dynamics in ...

Wenyu Zhou; Isaac M. Held; Stephen T. Garner

199

Heat, Moisture, and Momentum Budgets of Isolated Deep Midlatitude and Tropical Convective Clouds as Diagnosed from Three-Dimensional Model Output. Part I: Control Experiments  

Science Conference Proceedings (OSTI)

This project uses a three-dimensional anelastic cloud model with a simple ice phase parameterization to evaluate the feedback between isolated deep convective clouds and their near surroundings. The horizontal Reynolds averaging approach of ...

Robert E. Schlesinger

1994-12-01T23:59:59.000Z

200

Distant Effects of a Recurving Tropical Cyclone on Rainfall in a Midlatitude Convective System: A High-Impact Predecessor Rain Event  

Science Conference Proceedings (OSTI)

Recent research has identified predecessor rain events (PREs), which are mesoscale regions of heavy rainfall that occur 1000 km poleward and downshear of recurving tropical cyclones (TCs). PREs typically occur 24–36 h prior to the arrival of the ...

Russ S. Schumacher; Thomas J. Galarneau Jr.; Lance F. Bosart

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Visiting TOGA's Past  

Science Conference Proceedings (OSTI)

The origin of the Tropical Oceans-Global Atmosphere (TOGA) Program was closely related to the response of global atmospheric circulation to sea surface temperature variations in the tropical Pacific Ocean, which is evident by the El Niño ...

David Halpern

1996-02-01T23:59:59.000Z

202

Plan Your School Visit  

NLE Websites -- All DOE Office Websites (Extended Search)

Plan Your School Visit Plan Your School Visit For Teachers Teachers Visit the Museum We Visit You Teacher Resources Home Schoolers Plan Your School Visit invisible utility element Plan Your School Visit Chaperones To ensure that your students have the best possible experience at the Museum, we ask that you provide one chaperone for every 6 children. The chaperones should stay with their assigned group of students throughout the entire visit and model positive behavior. General Before arriving at the Museum, please remind your students about the following guidelines: If possible, leave food and drinks on the bus. Respect other visitors in the Museum by using inside voices, walking, etc. Please be gentle with the exhibits. Cameras are welcome at the Bradbury Science Museum. Have fun! Upon your arrival

203

Environmental Conditions Prior to Formation of a Midget Tropical Cyclone during TCM-93  

Science Conference Proceedings (OSTI)

During a 10-day period in the Tropical Cyclone Motion (TCM-93) field experiment over the tropical western North Pacific, tropical cyclone formation occurred in association with persistent deep convection that was observed over low-level, north-...

Patrick A. Harr; Michael S. Kalafsky; Russell L. Elsberry

1996-08-01T23:59:59.000Z

204

Soil Moisture Impacts on Convective Margins  

Science Conference Proceedings (OSTI)

An idealized prototype for the location of the margins of tropical land region convection zones is extended to incorporate the effects of soil moisture and associated evaporation. The effect of evaporation, integrated over the inflow trajectory ...

Benjamin R. Lintner; J. David Neelin

2009-08-01T23:59:59.000Z

205

The Influence of Tropical heating Displacements on the Extratropical Climate  

Science Conference Proceedings (OSTI)

The hypothesis is advanced that a latitudinal shift in the tropical convective heating pattern can significantly alter temperatures in the extratropics. Results of a simplified GCM show that the shift of a prescribed tropical heating toward the ...

Arthur Y. Hou

1993-11-01T23:59:59.000Z

206

On the Wave Spectrum Generated by Tropical Heating  

Science Conference Proceedings (OSTI)

Convective heating profiles are computed from one month of rainfall rate and cloud-top height measurements using global Tropical Rainfall Measuring Mission and infrared cloud-top products. Estimates of the tropical wave response to this heating ...

David A. Ortland; M. Joan Alexander; Alison W. Grimsdell

2011-09-01T23:59:59.000Z

207

Intraseasonal Behavior of Clouds, Temperature, and Motion in the Tropics  

Science Conference Proceedings (OSTI)

The spectral character of tropical convection is investigated in an 11-yr record of outgoing longwave radiation from the Advanced Very High Resolution Radiometer to identify interaction with the tropical circulation. Along the equator in the ...

Murry L. Salby; Harry H. Hendon

1994-08-01T23:59:59.000Z

208

ARM - Visiting the SGP  

NLE Websites -- All DOE Office Websites (Extended Search)

PlainsVisiting the SGP PlainsVisiting the SGP SGP Related Links Facilities and Instruments Central Facility Boundary Facility Extended Facility Intermediate Facility Radiometric Calibration Facility Geographic Information ES&H Guidance Statement Operations Science Field Campaigns Visiting the Site Fact Sheet Images Information for Guest Scientists Contacts Visiting the SGP View a custom Google map with driving directions to the SGP Central Facility. View a custom Google map with driving directions to the SGP Central Facility. Safety First! Before visiting the SGP, you must submit a Site Access Request Form. When visiting the site, you must attend a safety orientation given by the Site Operations Manager. Environmental Safety and Health Documents The Environmental Safety and Health (ES&H) documents listed below are

209

Visit the Museum  

NLE Websites -- All DOE Office Websites (Extended Search)

Visit the Museum Visit the Museum For Teachers Teachers Visit the Museum We Visit You Teacher Resources Home Schoolers Plan Your School Visit invisible utility element Visit the Museum The Bradbury Science Museum offeres unique resources and experiences for groups. Bring History to Life Examine primary sources and artifacts from the World War II Manhattan Project at Los Alamos from Einstein's letter to President Roosevelt to the electronic fireset that set off Fat Man. Watch the 17-minute documentary film The Town that Never Was. Meet some of the people who played important roles at Los Alamos. Science Inspiration Participate in interactive exhibits showcasing current LANL projects such as nanotechnology, algae biofuels, environmental monitoring, supercomputing, and understanding radiation. Listen to personal narratives

210

ARM tropical pacific experiment (ATPEX): Role of cloud, water vapor and convection feedbacks in the coupled ocean/atmosphere system. Progress report, September 1, 1991--August 31, 1992  

SciTech Connect

We have initiated studies that include radiation model validation, improved treatment of the three-dimensional structure of cloud-radiation interactions, and sensitivity runs that will unravel the role of cloud-convection-radiation interactions in the Pacific Sear Surface Temperatures and the overlying Walker and Hadley circulation. The research program is divided into three phases: (1) radiation, (2) cloud parameterization issues; (3) feedback and ocean-atmosphere interactions.

Ramanathan, V.; Barnett, T.P.

1992-03-05T23:59:59.000Z

211

A transilient matrix for moist convection  

SciTech Connect

A method is introduced for diagnosing a transilient matrix for moist convection. This transilient matrix quantifies the nonlocal transport of air by convective eddies: for every height z, it gives the distribution of starting heights z{prime} for the eddies that arrive at z. In a cloud-resolving simulation of deep convection, the transilient matrix shows that two-thirds of the subcloud air convecting into the free troposphere originates from within 100 m of the surface. This finding clarifies which initial height to use when calculating convective available potential energy from soundings of the tropical troposphere.

Romps, D.; Kuang, Z.

2011-08-15T23:59:59.000Z

212

Characteristics of Strong Updrafts in Precipitation Systems over the Central Tropical Pacific Ocean and in the Amazon  

Science Conference Proceedings (OSTI)

Airborne in situ measurements of updrafts in tropical convective storms were analyzed to determine the similarities and differences between updrafts in a tropical continental and a tropical oceanic region. Two hundred fifteen updraft cores from ...

Nicholas F. Anderson; Cedric A. Grainger; Jeffrey L. Stith

2005-05-01T23:59:59.000Z

213

The Role of Clouds, Water Vapor, Circulation, and Boundary Layer Structure in the Sensitivity of the Tropical Climate  

Science Conference Proceedings (OSTI)

The physical mechanisms that affect the tropical sea surface temperature (SST) are investigated using a two-box equilibrium model of the Tropics. One box represents the convecting, warm SST, high humidity region of the Tropics, and the other box ...

Kristin Larson; Dennis L. Hartmann; Stephen A. Klein

1999-08-01T23:59:59.000Z

214

Detecting Source Regions of Wave Activities in the Tropical Atmosphere by Applying Beamforming to Interpolated Data Grids  

Science Conference Proceedings (OSTI)

Wave activities are primary sources of weather disturbances and cyclones in the tropical atmosphere. One such activity is the intraseasonal variations in wind, convection, and precipitation in the tropical Indian and western tropical Pacific ...

Qi Hu; Zhaoning Liang; Michael W. Hoffman

2009-02-01T23:59:59.000Z

215

ARM - Visiting the NSA  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Images Information for Guest Scientists Contacts Visiting the NSA View a custom Google map with driving directions to the Barrow site. Zoom in on the map for more detail....

216

Visiting Scientists and Researchers  

NLE Websites -- All DOE Office Websites (Extended Search)

Barrow. Tropical Western Pacific The TWP site includes an area at the equator near Indonesia. This region of the world plays a large role in the interan- nual variability...

217

Rapid Filamentation Zones in Intense Tropical Cyclones  

Science Conference Proceedings (OSTI)

Intense tropical cyclones often possess relatively little convection around their cores. In radar composites, this surrounding region is usually echo-free or contains light stratiform precipitation. While subsidence is typically quite pronounced ...

Christopher M. Rozoff; Wayne H. Schubert; Brian D. McNoldy; James P. Kossin

2006-01-01T23:59:59.000Z

218

A Numerical Investigation of Tropical Island Thunderstorms  

Science Conference Proceedings (OSTI)

A version of the United Kingdom Meteorological Office mesoscale weather prediction model is used to simulate cases of deep tropical convection from the Island Thunderstorm Experiment off the north coast of Australia. Selected cases contrast ...

B. W. Golding

1993-05-01T23:59:59.000Z

219

Adjoint Sensitivity and Predictability of Tropical Cyclogenesis  

Science Conference Proceedings (OSTI)

The sensitivity of tropical cyclogenesis and subsequent intensification is explored by applying small perturbations to the initial state in the presence of organized mesoscale convection and synoptic-scale forcing using the adjoint and tangent ...

James D. Doyle; Carolyn A. Reynolds; Clark Amerault; Jonathan Moskaitis

2012-12-01T23:59:59.000Z

220

Characteristics of Vertical Velocity Cores in Different Convective Systems Observed over Gadanki, India  

Science Conference Proceedings (OSTI)

The Indian mesosphere–stratosphere–troposphere (MST) radar measurements during the passage of 60 convective systems are used to study the vertical air velocity (w) characteristics of tropical convection. The up- and downdraft cores and various ...

K. N. Uma; T. Narayana Rao

2009-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Convective Forcing Fluctuations in a Cloud-Resolving Model: Relevance to the Stochastic Parameterization Problem  

Science Conference Proceedings (OSTI)

Idealized cloud-resolving model (CRM) simulations spanning a large part of the tropical atmosphere are used to evaluate the extent to which deterministic convective parameterizations fail to capture the statistical fluctuations in deep-convective ...

G. J. Shutts; T. N. Palmer

2007-01-01T23:59:59.000Z

222

Inertial Instability and Mesoscale Convective Systems. part II. Symmetric CISK in a Baroclinic Flow  

Science Conference Proceedings (OSTI)

Numerous budget studies of organized persistent systems of convective clouds outside the tropics suggest that circulations of mesoscale proportions are important in supplying moisture to the convective clouds, though the dynamical nature of ...

Kerry A. Emanuel

1982-05-01T23:59:59.000Z

223

Visiting | Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting the APS Visiting the APS If you have questions or need assistance planning your visit, please contact the APS User Office. Obtaining site access: General info: Visitors and new users | Non-U.S. Citizens Visitor registration: request access as a visitor who will not do hands-on work (guests, family members, students, etc.) Traveling to the APS: Transportation: Resources | University of Chicago Shuttle external link Directions: to Argonne | to the APS User Office Maps: Argonne Campus external link | Conference Center (402) | APS Facility & Beamlines | Parking Currency: The hotels and banks near Argonne do not exchange currency. Plan on using major credit cards, U.S. traveler's checks, or exchange currency in advance at the airport. See also: The Universal Currency Converter(tm) external link

224

SLE boundary visits  

E-Print Network (OSTI)

We study the probabilities with which chordal Schramm-Loewner Evolutions (SLE) visit small neighborhoods of boundary points. We find explicit formulas for general chordal SLE boundary visiting probability amplitudes, also known as SLE boundary zig-zags or order refined SLE multi-point Green's functions on the boundary. Remarkably, an exact answer can be found to this important SLE question for an arbitrarily large number of marked points. The main technique employed is a spin chain - Coulomb gas correspondence between tensor product representations of a quantum group and functions given by Dotsenko-Fateev type integrals. We show how to express these integral formulas in terms of regularized real integrals, and we discuss their numerical evaluation. The results are universal in the sense that apart from an overall multiplicative constant the same formula gives the amplitude for many different formulations of the SLE boundary visit problem. The formula also applies to renormalized boundary visit probabilities for interfaces in critical lattice models of statistical mechanics: we compare the results with numerical simulations of percolation, loop-erased random walk, and Fortuin-Kasteleyn random cluster models at Q=2 and Q=3, and find good agreement.

Niko Jokela; Matti Järvinen; Kalle Kytölä

2013-11-10T23:59:59.000Z

225

The residual mean circulation in the tropical tropopause layer driven by tropical waves  

Science Conference Proceedings (OSTI)

We use latent heating estimates derived from rainfall observations to construct model experiments that isolate equatorial waves forced by tropical convection from mid-latitude synoptic-scale waves. These experiments are used to demonstrate that ...

David A. Ortland; M. Joan Alexander

226

Inclusion of Mesoscale Updrafts and Downdrafts in Computations of Vertical Fluxes by Ensembles of Tropical Clouds  

Science Conference Proceedings (OSTI)

Ensembles of convective clouds, especially in the tropics, often have widespread precipitating anvils associated with their deeper convective clouds. Mesoscale downdrafts occur below the middle-level bases of the anvils, and mesoscale updrafts ...

Robert A. Houze Jr.; Chee-Pong Cheng

1981-08-01T23:59:59.000Z

227

EMSL: Visiting EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting EMSL Visiting EMSL EMSL is located in the City of Richland, which is found at the confluence of the Columbia and Yakima Rivers in southeastern Washington. Sitting on the "desert" side of Washington, Richland enjoys more than 300 days of sunshine a year. Together with the nearby cities of Pasco and Kennewick, it is often referred to as part of the "Tri-Cities", where the Columbia, Snake, and Yakima Rivers meet before heading to the Pacific Ocean. As part of the Pacific Northwest National Laboratory (PNNL), EMSL is located on the north Richland campus, most of which is just a short walk away from the Columbia River. View an interactive Hanford map or a map of the PNNL Main Campus. Additional Information User Portal 2014 Call for Proposals 2014 Proposal Guidance

228

Projection of Tropical Cyclones on Wavenumber–Frequency-Filtered Equatorial Waves  

Science Conference Proceedings (OSTI)

The impact of localized convection associated with tropical cyclones (TCs) on activity ascribed to equatorial waves is estimated. An algorithm is used to remove outgoing longwave radiation (OLR) signal in the vicinity of observed tropical cyclones,...

Anantha Aiyyer; Ademe Mekonnen; Carl J. Schreck III

2012-05-01T23:59:59.000Z

229

Necessary Conditions for Tropical Cyclone Rapid Intensification as Derived from 11 Years of TRMM Data  

Science Conference Proceedings (OSTI)

Rainfall and convective properties of tropical cyclones (TCs) are statistically quantified for different TC intensity change categories by using Tropical Rainfall Measuring Mission (TRMM) data from December 1997 to December 2008. Four 24-h future ...

Haiyan Jiang; Ellen M. Ramirez

230

Radiative Forcing of a Tropical Direct Circulation by Soil Dust Aerosols  

Science Conference Proceedings (OSTI)

The effect of soil dust aerosols upon the tropical climate is estimated by forcing a simple model of a tropical direct circulation. The model consists of a region vertically mixed by deep convection and a nonconvecting region, for which budgets ...

R. L. Miller; I. Tegen

1999-07-01T23:59:59.000Z

231

Intraseasonal Oscillations in the Global Atmosphere. Part I: Northern Hemisphere and Tropics  

Science Conference Proceedings (OSTI)

We have examined systematically oscillatory modes in the Northern Hemisphere and in the tropics. The 700 mb heights were used to analyze extratropical oscillations, and the outgoing longwave radiation to study tropical oscillations in convection. ...

Michael Ghil; Kingtse Mo

1991-03-01T23:59:59.000Z

232

Planning your Visit to the Museum  

NLE Websites -- All DOE Office Websites (Extended Search)

Your Visit Visit About the Museum Museum Hours Directions & Maps When to Visit Arrange for a Visit Around Los Alamos Contact Us invisible utility element Planning your visit to the...

233

The Onset of Convection in the Madden–Julian Oscillation  

Science Conference Proceedings (OSTI)

An observational study of the onset of convection in the Madden–Julian oscillation (MJO) was performed. Composites of radiosonde data from the Comprehensive Aerological Reference Data Set were constructed for an ensemble of tropical stations ...

Susan R. Kemball-Cook; Bryan C. Weare

2001-03-01T23:59:59.000Z

234

Convection-Evaporation Feedback in the Equatorial pacific  

Science Conference Proceedings (OSTI)

The coupling between convection and surface evaporation is investigated to assess the importance of evaporative cooling in regulating the tropical sea surface temperature. It is found that such a coupling is scale dependent. On timescales of ...

Guang Jun Zhang; V. Ramanathan; Michael J. McPhaden

1995-12-01T23:59:59.000Z

235

Wavelet-Compressed Representation of Deep Moist Convection  

Science Conference Proceedings (OSTI)

The capacity of wavelets to effectively represent atmospheric processes under compression is tested by a dataset generated by a cloud-resolving model simulation of deep convective events observed during the Tropical Ocean Global Atmosphere ...

Jun-Ichi Yano; Peter Bechtold; Jean-Luc Redelsperger; Francoise Guichard

2004-06-01T23:59:59.000Z

236

Diabatic Divergence Profiles in Western Pacific Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

Heating in the atmosphere can be expressed as diabatic divergence ?d, which is nearly equal to the actual horizontal divergence ? in tropical convection. High-quality ? profile measurements from airborne Doppler radar “purls” in ten mesoscale ...

Brian E. Mapes; Robert A. Houze Jr.

1995-05-01T23:59:59.000Z

237

Overview of the Convection and Moisture Experiment (CAMEX)  

Science Conference Proceedings (OSTI)

This paper presents an overview of the Convection and Moisture Experiment (CAMEX), including the field operations, aircraft platforms and missions, instrumentation, and data acquired during 1998 and 2001 field campaigns. A total of eight tropical ...

Ramesh Kakar; Michael Goodman; Robbie Hood; Anthony Guillory

2006-01-01T23:59:59.000Z

238

Characteristics of Summer Convective Systems Initiated over the Tibetan Plateau. Part I: Origin, Track, Development, and Precipitation  

Science Conference Proceedings (OSTI)

Summer convective systems (CSs) initiated over the Tibetan Plateau identified by the International Satellite Cloud Climatology Project (ISCCP) deep convection database and associated Tropical Rainfall Measuring Mission (TRMM) precipitation for ...

Li Yaodong; Wang Yun; Song Yang; Hu Liang; Gao Shouting; Rong Fu

2008-10-01T23:59:59.000Z

239

Retrieval of Cloud Water and Water Vapor Contents from Doppler Radar Data in a Tropical Squall Line  

Science Conference Proceedings (OSTI)

This paper describes the retrieval of cloud water and water vapor contents from Doppler radar data. The convective part of a tropical squall line (22 June 1981) observed during the COPT 81 (Convection Profonde Tropicale 1981) West African ...

Danièle Hauser; Paul Amayenc

1986-04-01T23:59:59.000Z

240

Transient Response to Localized Episodic Heating in the Tropics. Part I: Excitation and Short-Time Near-Field Behavior  

Science Conference Proceedings (OSTI)

The dynamical response to localized, unsteady tropical heating is studied in a stochastic framework. Spectral statistics of the random wave response are derived from those of tropical convection using the primitive equations for a spherical ...

Murry L. Salby; Rolando R. Garcia

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Control of the Tropical Tropopause and Vertical Transport across It  

Science Conference Proceedings (OSTI)

A 3D primitive equation model is used to investigate how the tropical tropopause is influenced by cumulus convection in the troposphere and mean upwelling in the stratosphere. The model simulates the residual mean circulation explicitly, whereas ...

Murry Salby; Patrick Callaghan

2004-03-01T23:59:59.000Z

242

The Boundary Layer of Tropical Cyclone Kerry (1979)  

Science Conference Proceedings (OSTI)

The boundary layer structure of Tropical Cyclone Kerry (1979) is investigated using composite analysis of research aircraft, surface ship, and automatic weather station observations. The boundary layer was moist, convective, and strongly ...

Peter G. Black; Greg J. Holland

1995-07-01T23:59:59.000Z

243

An Analysis of the Conditional Instability of the Tropical Atmosphere  

Science Conference Proceedings (OSTI)

The ice phase is included in thermodynamic calculations of convective available potential energy (CAPE) for a large number of soundings in the tropical atmosphere, at both land and ocean stations. It is found that the positive-buoyancy ...

Erle Williams; Nilton Renno

1993-01-01T23:59:59.000Z

244

Momentum Flux by Lines of Cumulonimbus over the Tropical Oceans  

Science Conference Proceedings (OSTI)

Examination of aircraft and rawinsonde data gathered in nine tropical mesoscale convective line cases indicates that all but two lines systematically increased front-to-rear momentum at heights greater than about 4 km, and rear-to-front momentum ...

Margaret A. LeMone; Gary M. Barnes; Edward J. Zipser

1984-06-01T23:59:59.000Z

245

Origin of Lapse Rate Changes in the Upper Tropical Troposphere  

Science Conference Proceedings (OSTI)

Vertical motions in clouds arise from a variety of thermodynamic processes, including latent heat release, evaporative cooling, melting, and cloud radiative heating. In the Tropics, the net upward vertical mass flux from convective systems should ...

Ian Folkins

2002-03-01T23:59:59.000Z

246

The Relationship of Highly Reflective Clouds to Tropical Climate Anomalies  

Science Conference Proceedings (OSTI)

The interannual variability of tropical convection related to the Southern Oscillation (SO) and regional climate anomalies is studied from satellite-derived estimates of highly reflective clouds (HRC) during 1971–87. The novel HRC data bank ...

Stefan Hastenrath

1990-03-01T23:59:59.000Z

247

Entropy Sources in Equilibrium Conditions over a Tropical Ocean  

Science Conference Proceedings (OSTI)

Confusion has existed as to sources of entropy due to irreversible processes in the atmosphere, the total of which matches the export of entropy by radiation. What is the mechanical efficiency of convection? For an ideal tropical oceanic system ...

Charles Warner

2005-05-01T23:59:59.000Z

248

A Low-Level Circulation in the Tropics  

Science Conference Proceedings (OSTI)

Deep convective tropical systems are strongly convergent in the midtroposphere. Horizontal wind measurements from a variety of rawinsonde arrays in the equatorial Pacific and Caribbean are used to calculate the mean dynamical divergence profiles ...

Ian Folkins; S. Fueglistaler; G. Lesins; T. Mitovski

2008-03-01T23:59:59.000Z

249

Distribution of Helicity, CAPE, and Shear in Tropical Cyclones  

Science Conference Proceedings (OSTI)

The previous study of helicity, CAPE, and shear in Hurricane Bonnie (1998) was extended to all eight tropical cyclones sampled by NASA during the Convection and Moisture Experiments (CAMEX). Storms were categorized as having large or small ...

John Molinari; David Vollaro

2010-01-01T23:59:59.000Z

250

An Extended Model for the Potential Intensity of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Emanuel’s theory of hurricane potential intensity (E-PI) makes use of the assumption that slantwise convective instability vanishes in a steady-state vortex of a tropical cyclone. In the framework of an extended mathematical potential intensity ...

Thomas Frisius; Daria Schönemann

2012-02-01T23:59:59.000Z

251

Effects of Environmental Flow upon Tropical Cyclone Structure  

Science Conference Proceedings (OSTI)

Numerical simulations of tropical-cyclone-like vortices are performed to analyze the effects of unidirectional vertical wind shear and translational flow upon the organization of convection within a hurricane’s core region and upon the intensity ...

William M. Frank; Elizabeth A. Ritchie

1999-09-01T23:59:59.000Z

252

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode.

Prueitt, Melvin L. (Los Alamos, NM)

1994-01-01T23:59:59.000Z

253

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water. 6 figs.

Prueitt, M.L.

1996-01-16T23:59:59.000Z

254

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1996-01-01T23:59:59.000Z

255

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air, of generating electricity, and of producing fresh water utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity, and condensers produce fresh water.

Prueitt, Melvin L. (Los Alamos, NM)

1995-01-01T23:59:59.000Z

256

NREL: Library - Visiting the Library  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting the Library Visiting the Library Lending Policy The NREL Library will lend material to outside requesters via their local library's Interlibrary Loan Services. Visitors may not borrow from our collection directly. The NREL Library comprises the main Library in Golden, Colorado and the Wind Technical Library at the National Wind Technology Center near Boulder, Colorado. The NREL Library comprises the main Library in Golden, Colorado and the Wind Technical Library at the National Wind Technology Center near Boulder, Colorado. NREL Library 15013 Denver West Parkway Golden, CO 80401-3305 Phone: 303-275-4215 Visiting Procedures Library hours: Monday-Friday, 8 a.m.-5 p.m. Please call the Information Desk at 303-275-4215 before visiting either branch. Visitors to NREL must be badged and escorted. To visit the main NREL

257

Tropical Oceanic Hot Towers: Need They Be Undilute to Transport Energy from the Boundary Layer to the Upper Troposphere Effectively? An Answer Based on Trajectory Analysis of a Simulation of a TOGA COARE Convective System  

Science Conference Proceedings (OSTI)

This paper addresses questions resulting from the authors’ earlier simulation of the 9 February 1993 Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Research Experiment (TOGA COARE) squall line, which used updraft trajectories to ...

Alexandre O. Fierro; Edward J. Zipser; Margaret A. LeMone; Jerry M. Straka; Joanne (Malkus) Simpson

2012-01-01T23:59:59.000Z

258

Convection towers  

DOE Patents (OSTI)

Convection towers which are capable of cleaning the pollution from large quantities of air and of generating electricity utilize the evaporation of water sprayed into the towers to create strong airflows and to remove pollution from the air. Turbines in tunnels at the skirt section of the towers generate electricity. Other embodiments may also provide fresh water, and operate in an updraft mode. 5 figures.

Prueitt, M.L.

1994-02-08T23:59:59.000Z

259

The Convective System Area Expansion over Amazonia and Its Relationships with Convective System Life Duration and High-Level Wind Divergence  

Science Conference Proceedings (OSTI)

The relationships between the initial area expansion rate of tropical convective systems and their total life duration are analyzed during the period of the Wet Season Amazon Mesoscale Campaign/Large-Scale Biosphere–Atmosphere (WETAMC/LBA) ...

Luiz Augusto T. Machado; Henri Laurent

2004-03-01T23:59:59.000Z

260

Visiting MCS | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

offer you. Visitor Registration Formal registration is REQUIRED in order to enter the Argonne site. If you are visiting Argonne, you will need to fill out the visitor registration...

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

CONVECTION REACTOR  

DOE Patents (OSTI)

An homogeneous nuclear power reactor utilizing convection circulation of the liquid fuel is proposed. The reactor has an internal heat exchanger looated in the same pressure vessel as the critical assembly, thereby eliminating necessity for handling the hot liquid fuel outside the reactor pressure vessel during normal operation. The liquid fuel used in this reactor eliminates the necessity for extensive radiolytic gas rocombination apparatus, and the reactor is resiliently pressurized and, without any movable mechanical apparatus, automatically regulates itself to the condition of criticality during moderate variations in temperature snd pressure and shuts itself down as the pressure exceeds a predetermined safe operating value.

Hammond, R.P.; King, L.D.P.

1960-03-22T23:59:59.000Z

262

Radiative Forcing of Simulated Tropical Cloud Clusters  

Science Conference Proceedings (OSTI)

A number of field experiments and subsequent studies in the 1970s and 1980s have led to the belief that radiative processes play a more significant role in the evolution of tropical mesoscale convective systems (MCSS) than was once thought. In ...

Rosemary Auld Miller; William M. Frank

1993-02-01T23:59:59.000Z

263

Rapid Intensification of a Sheared Tropical Storm  

Science Conference Proceedings (OSTI)

A weak tropical storm (Gabrielle in 2001) experienced a 22-hPa pressure fall in less than 3 h in the presence of 13 m s?1 ambient vertical wind shear. A convective cell developed downshear left of the center and moved cyclonically and inward to ...

John Molinari; David Vollaro

2010-10-01T23:59:59.000Z

264

Professional Preface, 2 (2): Presidential Visit  

Science Conference Proceedings (OSTI)

Naturally, all visits are subject to the availability of the TMS president. Photo TMS President Lionel Kimerling visits with the Michigan Materials Society (MMS) ...

265

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation. 14 figs.

Thorogood, R.M.

1983-12-27T23:59:59.000Z

266

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1986-01-01T23:59:59.000Z

267

Convective heater  

DOE Patents (OSTI)

A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.

Thorogood, Robert M. (Macungie, PA)

1983-01-01T23:59:59.000Z

268

Diagnosis of Convective and Mesoscale Motions During Phase IH of Gate  

Science Conference Proceedings (OSTI)

Observational evidence from GATE suggests that a significant fraction of precipitation in tropical disturbances over the eastern Atlantic occurs beneath anvil-type mesoscale convective systems that are frequently associated with intense ...

Richard H. Johnson

1980-04-01T23:59:59.000Z

269

CAPE and Convective Events in the Southwest during the North American Monsoon  

Science Conference Proceedings (OSTI)

The relationship between atmospheric stability, measured as CAPE, and deep precipitating convection has been widely studied but is not definitive. In the maritime tropics, CAPE and precipitation are usually inversely correlated. In continental ...

David K. Adams; Enio P. Souza

2009-01-01T23:59:59.000Z

270

Convective Transport Theory for Surface Fluxes Tested over the Western Pacific Warm Pool  

Science Conference Proceedings (OSTI)

Turbulent flux measurements from five flights of the National Center for Atmospheric Research Electra aircraft during the Tropical Oceans and Global Atmosphere Coupled Ocean–Atmosphere Response Experiment (TOGA COARE) are used to test convective ...

Lawrence Greischar; Roland Stull

1999-07-01T23:59:59.000Z

271

The Vertical Structure of TOGA COARE Convection. Part I: Radar Echo Distributions  

Science Conference Proceedings (OSTI)

Radar data collected by the 5-cm MIT radar, which was deployed aboard the R/V Vickers during the intensive observing period of the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment, are partitioned into convective and ...

Charlotte A. DeMott; Steven A. Rutledge

1998-09-01T23:59:59.000Z

272

Observations of a Convectively Coupled Kelvin Wave in the Eastern Pacific ITCZ  

Science Conference Proceedings (OSTI)

A case study of a convectively coupled Kelvin wave in the eastern Pacific intertropical convergence zone (ITCZ) is presented, as observed during the 1997 Pan American Climate Studies (PACS) Tropical Eastern Pacific Process Study (TEPPS). The ...

Katherine H. Straub; George N. Kiladis

2002-01-01T23:59:59.000Z

273

Improving Simulations of Convective Systems from TRMM LBA: Easterly and Westerly Regimes  

Science Conference Proceedings (OSTI)

The 3D Goddard Cumulus Ensemble model is used to simulate two convective events observed during the Tropical Rainfall Measuring Mission Large-Scale Biosphere–Atmosphere (TRMM LBA) experiment in Brazil. These two events epitomized the type of ...

S. Lang; W-K. Tao; J. Simpson; R. Cifelli; S. Rutledge; W. Olson; J. Halverson

2007-04-01T23:59:59.000Z

274

Possibility of the Visible-Channel Calibration Using Deep Convective Clouds Overshooting the TTL  

Science Conference Proceedings (OSTI)

The authors examined the possible use of deep convective clouds (DCCs), defined as clouds that overshoot the tropical tropopause layer (TTL), for the calibration of satellite measurements at solar channels. DCCs are identified in terms of the ...

B-J. Sohn; Seung-Hee Ham; Ping Yang

2009-11-01T23:59:59.000Z

275

Relating Passive 37-GHz Scattering to Radar Profiles in Strong Convection  

Science Conference Proceedings (OSTI)

Tropical Rainfall Measuring Mission (TRMM) Microwave Imager and precipitation radar measurements are examined for strong convective systems. Storms having similar values of minimum 37-GHz polarization-corrected temperature (PCT) are grouped ...

Daniel J. Cecil

2011-01-01T23:59:59.000Z

276

Intraseasonal and Seasonal-to-Interannual Indian Ocean Convection and Hemispheric Teleconnections  

Science Conference Proceedings (OSTI)

Deep tropical convection over the Indian Ocean leads to intense diabatic heating, a main driver of the climate system. The Northern Hemisphere circulation and precipitation associated with intraseasonal and seasonal-to-interannual components of ...

Andrew Hoell; Mathew Barlow; Roop Saini

277

Role of Gravity Waves in Triggering Deep Convection during TOGA COARE  

Science Conference Proceedings (OSTI)

The role of gravity waves in the initiation of convection over oceanic regions during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment (TOGA COARE) experiment is investigated. First, an autocorrelation method is ...

C. Lac; J-P. Lafore; J-L. Redelsperger

2002-04-01T23:59:59.000Z

278

Effects of Tropospheric Wind Shear on the Spectrum of Convectively Generated Gravity Waves  

Science Conference Proceedings (OSTI)

The authors examine the effects of tropospheric wind shear on the phase speed spectrum of gravity waves generated by tropical convection. A two-dimensional cloud-resolving model is used to perform numerous squall line simulations with the ...

Jadwiga H. Beres; M. Joan Alexander; James R. Holton

2002-06-01T23:59:59.000Z

279

Mesoscale Convective Systems over Western Equatorial Africa and Their Relationship to Large-Scale Circulation  

Science Conference Proceedings (OSTI)

This study examines mesoscale convective systems (MCSs) over western equatorial Africa using data from the Tropical Rainfall Measuring Mission (TRMM) satellite. This region experiences some of the world’s most intense thunderstorms and highest ...

Brian Jackson; Sharon E. Nicholson; Douglas Klotter

2009-04-01T23:59:59.000Z

280

Vertical Motion Structure in Maritime continent mesoscale Convective Systems: Results from a 50-MHz Profiler  

Science Conference Proceedings (OSTI)

Wind profiler data wore used to determine the vertical motion structure in four tropical mcsoscale convective systems (MCSs), which occurred during the Down Under Doppler and Electricity Experiment (DUNDEE) near Darwin. Northern Territory, ...

Robert Cifelli; Steven A. Rutledge

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Convective Forcing in the Intertropical Convergence Zone of the Eastern Pacific  

Science Conference Proceedings (OSTI)

One of the goals of the East Pacific Investigation of Climate, year 2001 process study (EPIC2001), was to understand the mechanisms controlling the forcing of deep atmospheric convection over the tropical eastern Pacific. An intensive study was ...

David J. Raymond; G. B. Raga; Christopher S. Bretherton; John Molinari; Carlos López-Carrillo; Željka Fuchs

2003-09-01T23:59:59.000Z

282

Global Variability of Mesoscale Convective System Anvil Structure from A-Train Satellite Data  

Science Conference Proceedings (OSTI)

Mesoscale convective systems (MCSs) in the tropics produce extensive anvil clouds, which significantly affect the transfer of radiation. This study develops an objective method to identify MCSs and their anvils by combining data from three A-...

Jian Yuan; Robert A. Houze Jr.

2010-11-01T23:59:59.000Z

283

A Numerical Study of a Mesoscale Convective System during TOGA COARE. Part II: Organization  

Science Conference Proceedings (OSTI)

In Part I, the authors presented a successful numerical simulation of the life cycle of a warm-pool mesoscale convective system (MCS) that occurred on 15 December 1992 during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response ...

Badrinath Nagarajan; M. K. Yau; Da-Lin Zhang

2004-04-01T23:59:59.000Z

284

The Energy Department Prepares for Tropical Storm Karen | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Energy Department Prepares for Tropical Storm Karen The Energy Department Prepares for Tropical Storm Karen The Energy Department Prepares for Tropical Storm Karen October 4, 2013 - 3:00pm Addthis Marissa Newhall Marissa Newhall Managing Editor, Energy.gov What does this mean for me? Follow the latest news on Tropical Storm Karen by visiting the FEMA blog. Stay up-to-date on energy delivery impacts by reading twice-daily situation reports from the Energy Department. Visit ready.gov for more information about emergency preparedness. Editor's note: As of Monday, October 7, 2013, Energy Department reporting about Tropical Storm Karen has concluded, and no additional situation reports will be posted. The Department of Energy (DOE) is working closely with the Federal Emergency Management Agency (FEMA) and in support of state and local

285

Feature - Government of Kentucky Visit  

NLE Websites -- All DOE Office Websites (Extended Search)

Kentucky Government Officials View Argonne Battery, Transportation Technology Projects Kentucky Government Officials View Argonne Battery, Transportation Technology Projects Glenn Keller (ES), section leader for vehicle systems (right), takes Kentucky Governor Steve Beshear on a tour of Argonne's Advanced Powertrain Research Facility. Photo by George Joch. Governor Steve Beshear of Kentucky, members of the Kentucky government, and Kentucky university officials visited Argonne's battery materials and vehicle systems groups, among others, on November 5, 2008. The visitors explored collaborative opportunities with Argonne during their stay. Vehicle Systems Manager Glenn Keller said of the visit, "The State of Kentucky has the third highest concentration of U.S. automobile production and represents a perfect synergistic partner for Argonne in terms of collaboration on advanced technologies for sustainable transportation."

286

Cloud Clusters and Tropical Cyclogenesis: Developing and Nondeveloping Systems and Their Large-Scale Environment  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) genesis occurs only when there is persistent, organized convection. The question of why some cloud clusters develop into a TC and others do not remains unresolved. This question cannot be addressed adequately without studying ...

Brandon W. Kerns; Shuyi S. Chen

2013-01-01T23:59:59.000Z

287

Inertial Available Kinetic Energy and the Dynamics of Tropical Plume Formation  

Science Conference Proceedings (OSTI)

Tropical plumes are identified in satellite data as elongated cloud bands originating from convective activity along the intertropical convergence zone (ITCZ), often extending far into the subtropics and middle latitudes. Many previous studies ...

John R. Mecikalski; Gregory J. Tripoli

1998-08-01T23:59:59.000Z

288

Response of Tropical Clouds to the Interannual Variation of Sea Surface Temperature  

Science Conference Proceedings (OSTI)

Connections between the large-scale interannual variations of clouds, deep convection, atmospheric winds, vertical thermodynamic structure, and SSTs over global tropical oceans are examined over the period July 1983-December 1990. The SST warming ...

Rong Fu; W. Timothy Liu; Robert E. Dickinson

1996-03-01T23:59:59.000Z

289

Tropical Climate Regimes and Global Climate Sensitivity in a Simple Setting  

Science Conference Proceedings (OSTI)

Multiple tropical climate regimes are found in an atmospheric general circulation model (AGCM) coupled to a global slab ocean when the model is forced by different values of globally uniform insolation. Even in this simple setting, convection ...

Joseph Barsugli; Sang-Ik Shin; Prashant D. Sardeshmukh

2005-04-01T23:59:59.000Z

290

MIMIC: A New Approach to Visualizing Satellite Microwave Imagery of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Satellite-based passive microwave imagery of tropical cyclones (TCs) is an invaluable resource for assessing the organization and evolution of convective structures in TCs when often no other comparable observations exist. However, the current ...

Anthony J. Wimmers; Christopher S. Velden

2007-08-01T23:59:59.000Z

291

Lightning Flash Rates as an Indicator of Tropical Cyclone Genesis in the Eastern North Pacific  

Science Conference Proceedings (OSTI)

Lightning flashes in convective tropical clusters of the eastern North Pacific Ocean are detected by the Long-Range Lightning Detection Network and are analyzed for temporal patterns in electrical activity. The rates of lightning flash discharge ...

Lesley A. Leary; Elizabeth A. Ritchie

2009-10-01T23:59:59.000Z

292

A Numerical Study of Lapse-Rate Adjustments in the Tropical Atmosphere  

Science Conference Proceedings (OSTI)

Observations in the tropics have shown that the lapse rate of virtual Potential temperature ?v normally resembles that of a reversible moist adiabat. In the present study, a mesoscale numerical model with parameterized convection is used to ...

Charles Cohen; William M. Frank

1989-08-01T23:59:59.000Z

293

Electrically Active Hot Towers in African Easterly Waves prior to Tropical Cyclogenesis  

Science Conference Proceedings (OSTI)

It has been hypothesized that intense convective-scale “hot” towers play a role in tropical cyclogenesis via dynamic and thermodynamic feedbacks on the larger-scale circulation. In this study the authors investigate the role that widespread and/...

Kenneth D. Leppert II; Walter A. Petersen

2010-03-01T23:59:59.000Z

294

The Role of “Vortical” Hot Towers in the Formation of Tropical Cyclone Diana (1984)  

Science Conference Proceedings (OSTI)

A high-resolution (3-km horizontal grid spacing) near-cloud-resolving numerical simulation of the formation of Hurricane Diana (1984) is used to examine the contribution of deep convective processes to tropical cyclone formation. This study is ...

Eric A. Hendricks; Michael T. Montgomery; Christopher A. Davis

2004-06-01T23:59:59.000Z

295

Properties of Tropical Cloud Ensembles Estimated Using a Cloud Model and an Observed Updraft Population  

Science Conference Proceedings (OSTI)

A simple cloud model is developed which is designed for both diagnostic studies and mesoscale cumulus parameterization experiments. The cloud model is combined with an observed population of tropical convective updrafts and used to examine the ...

William M. Frank; Charles Cohen

1985-09-01T23:59:59.000Z

296

A Quasi-Equilibrium Tropical Circulation Model—Implementation and Simulation  

Science Conference Proceedings (OSTI)

The quasi-equilibrium tropical circulation model (QTCM1) is implemented and tested. The formulation, described by Neelin and Zeng, uses a Galerkin framework in the vertical, but with basis functions tailored to quasi-equilibrium deep convective ...

Ning Zeng; J. David Neelin; Chia Chou

2000-06-01T23:59:59.000Z

297

On the Observed Near Cancellation between Longwave and Shortwave Cloud Forcing in Tropical Regions  

Science Conference Proceedings (OSTI)

Observations based on Earth Radiation Budget Experiment (ERBE) satellite data indicate that there is a near cancellation between tropical longwave and shortwave cloud forcing in regions of deep convective activity. Cloud forcing depends on both ...

J. T. Kiehl

1994-04-01T23:59:59.000Z

298

Vorticity Budget for AMEX. Part II: Simulations of Monsoon Onset, Midtropospheric Lows, and Tropical Cyclone Behavior  

Science Conference Proceedings (OSTI)

Diagnostics from the observational dataset of the Australian Monsoon Experiment (AMEX) have revealed two interesting characteristics of convective systems over the Australian Tropics (Part I of this study). The first is a midlevel convergence ...

Noel E. Davidson

1995-06-01T23:59:59.000Z

299

Maintenance of the Free-Tropospheric Tropical Water Vapor Distribution. Part I: Clear Regime Budget  

Science Conference Proceedings (OSTI)

The water vapor budget of the free troposphere of the maritime Tropics is investigated using radiosonde observations, analyzed fields, and satellite observations, with particular attention paid to regions free of organized convection. In these ...

Steven C. Sherwood

1996-11-01T23:59:59.000Z

300

El Niño as a Natural Experiment for Studying the Tropical Tropopause Region  

Science Conference Proceedings (OSTI)

The interannual variability of the tropical tropopause region between 14 and 18 km is examined using observations of convection, winds, and tropopause temperatures from reanalyses and water vapor from satellites. This variability is compared to a ...

A. Gettelman; W. J. Randel; S. Massie; F. Wu; W. G. Read; J. M. Russell III

2001-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Influence of Tropical Cyclones on Humidity Patterns over Southern Baja California, Mexico  

Science Conference Proceedings (OSTI)

The influence of tropical cyclone circulations in the distribution of humidity and convection over northwestern Mexico is investigated by analyzing circulations that developed in the eastern Pacific Ocean from 1 July to 21 September 2004. ...

Luis M. Farfán; Ira Fogel

2007-04-01T23:59:59.000Z

302

Life Cycle Variations of Mesoscale Convective Systems over the Americas  

Science Conference Proceedings (OSTI)

Using GOES-7 ISCCP-B3 satellite data for 1987–88, the authors studied the evolution of the morphological and radiative properties of clouds over the life cycles of deep convective systems (CS) over the Americas at both tropical and middle ...

L. A. T. Machado; W. B. Rossow; R. L. Guedes; A. W. Walker

1998-06-01T23:59:59.000Z

303

Severe Convective Wind Environments  

Science Conference Proceedings (OSTI)

Nontornadic thunderstorm winds from long-lived, widespread convective windstorms can have a tremendous impact on human lives and property. To examine environments that support damaging wind producing convection, sounding parameters from Rapid ...

Evan L. Kuchera; Matthew D. Parker

2006-08-01T23:59:59.000Z

304

BRAZIL VISITING FELLOWSHIP SCHEME Application Form  

E-Print Network (OSTI)

BRAZIL VISITING FELLOWSHIP SCHEME Application Form APPLICATIONS SHOULD BE TYPEWRITTEN AND BOXES of attendance Qualifications awarded and class of Honours, etc. Principal Subject(s) taken #12;BRAZIL VISITING): Date(s) From To To Nature of work and Position held Name and address of employer #12;BRAZIL VISITING

Birmingham, University of

305

ARM - Publications: Science Team Meeting Documents: Tropical Warm Pool  

NLE Websites -- All DOE Office Websites (Extended Search)

Tropical Warm Pool International Cloud Experiment Tropical Warm Pool International Cloud Experiment May, Peter Bureau or Meteorology Research Centre Mather, James Pacific Northwest National Laboratory Jakob, Christian BMRC One of the most complete data sets describing tropical convection ever collected will result from the upcoming Tropical Warm Pool International Cloud Experiment (TWPICE) in the area around Darwin in late 2005 and early 2006. The aims of the experiment will be to examine convective cloud systems from their initial stages through to the decay of the cirrus generated and to measure their impact on the environment. The experiment design includes an unprecedented network of ground-based observations (soundings, active and passive remote sensors) combined with a large range of low, mid and high altitude aircraft for in-situ and remote sensing

306

The convective structures associated with cloud-to-ground lightning in TOGA COARE Mesoscale Convective Systems  

E-Print Network (OSTI)

The TOGA COARE experiment was carried out in the western Pacific warm pool region from November 1992 through February 1993. Data from TOGA COARE provide the opportunity for comprehensive studies of tropical oceanic convection. This study seeks to understand more about the structures of tropical mesoscale convective systems in relation to their lightning activity and cold cloud area. The properties of convective cores within the MCSs, as well as their infrared (IR) cloud top temperatures are related to cloud-to-ground lightning. IR and lightning time histories for each case are compared, and the cases ranked by mean flashes per 10000 km2. For selected cases, radar/lightning overlays and vertical profiles of maximum radar reflectivities (VPRRs) are shown in order to describe the convective structures of cells that produced lightning, and also cells that did not produce lightning. IR cloud-top temperature and lightning histories indicate the highly variable nature of the TOGA COARE MCSs. Some MCSs which have very cold cloud-top temperatures have little or no lightning. When a system did produce lightning, more flashes generally occurred during its growth phase. Overall, IR measurements seem to be a poor indicator of lightning due to the lack of a clear relationship between the size of cold cloud-top area and cloud-to-ground flashes. The overall flash rates of the TOGA COARE MCSs support previous work which showed that tropical oceanic convection has an order of magnitude less cloud-to-ground lightning than continental convection. In fact, the highest flash rate for the 13 cases was less than the weakest continental case in a Texas MCS study (Toracinta et al. 1995). Examination of individual VPRR and of all convective VPRR from the 13 cases indicate a pronounced difference between lightning producing and non-lightning producing cells. Lightning producing convective cells have higher radar reflectivity in the 5.0- 8.0 km layer, and a slower decrease with height, both observations indicating larger ice particles in the mixed phase region between 00 C and-200 C.

Restivo, Michael Edward

1995-01-01T23:59:59.000Z

307

The MJO and Convectively Coupled Waves in a Coarse-Resolution GCM with a Simple Multicloud Parameterization  

Science Conference Proceedings (OSTI)

The adequate representation of the dominant intraseasonal and synoptic-scale variability in the tropics, characterized by the Madden–Julian oscillation (MJO) and convectively coupled waves, is still problematic in current operational general ...

Boualem Khouider; Amik St-Cyr; Andrew J. Majda; Joseph Tribbia

2011-02-01T23:59:59.000Z

308

A Numerical Study of a Mesoscale Convective System during TOGA COARE. Part I: Model Description and Verification  

Science Conference Proceedings (OSTI)

A 16-h numerical simulation of the growing and mature stages of the 15 December 1992 Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment (TOGA COARE) mesoscale convective system (MCS) is performed to demonstrate the ...

Badrinath Nagarajan; M. K. Yau; Da-Lin Zhang

2001-10-01T23:59:59.000Z

309

A Spatial Filter Approach to Evaluating the Role of Convection on the Evolution of a Mesoscale Vortex  

Science Conference Proceedings (OSTI)

A new spatial filter is proposed that exploits a spectral gap in power between the convective scale and the system (“vortex”) scale during tropical cyclone (TC) genesis simulations. Using this spatial separation, this study analyzes idealized ...

Glenn A. Creighton; Robert E. Hart; Philip Cunningham

2013-07-01T23:59:59.000Z

310

Intraseasonal Forcing of Convection and Lightning Activity in the Southern Amazon as a Function of Cross-Equatorial Flow  

Science Conference Proceedings (OSTI)

This study focuses on modulation of lightning and convective vertical structure in the southern Amazon as a function of the South American monsoon V index (VI). Four wet seasons (December–March 1998–2001) of Tropical Rainfall Measuring Mission (...

Walter A. Petersen; Rong Fu; Mingxuan Chen; Richard Blakeslee

2006-07-01T23:59:59.000Z

311

Unclassified Foreign National Visits & Assignments Questionnaire |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Services » Calibration Facilities » Unclassified Foreign National Services » Calibration Facilities » Unclassified Foreign National Visits & Assignments Questionnaire Unclassified Foreign National Visits & Assignments Questionnaire Visitors who are foreign nationals must complete and submit the Unclassified Foreign National Visits & Assignments Questionnaire 30 days before accessing facilities. Unclassified Foreign National Visits.doc Description Unclassified Foreign National Visits & Assignments Questionnaire More Documents & Publications NEUP Foreign Travel Request Form FAQS Qualification Card - Safeguards and Security General Technical Base FAQS Qualification Card - Safeguards and Security Calibration Facilities Ecosystem Management Team Environmental Justice Environmental Management System Long-Term Surveillance - Operations and Maintenance

312

Statistical Properties of Episodes of Enhanced 2–3-Day Convection in the Indian and Pacific Oceans  

Science Conference Proceedings (OSTI)

Using 9 yr of IR brightness temperature values as a proxy for tropical convection, the climatology and statistics of the 2–3-day convective oscillation signal are examined. These higher-frequency oscillations are shown to have a very different ...

Jon M. Schrage; Carol Anne Clayson; Brian Strahl

2001-08-01T23:59:59.000Z

313

Final Report - Summer Visit 2010  

SciTech Connect

During my visit to LLNL during the summer of 2010, I worked on algebraic multilevel solvers for large sparse systems of linear equations arising from discretizations of partial differential equations. The particular solver of interest is based on ILU decomposition. The setup phase for this AMG solve is just the single ILU decomposition, and its corresponding error matrix. Because the ILU uses a minimum degree or similar sparse matrix ordering, most of the fill-in, and hence most of the error, is concentrated in the lower right corner of the factored matrix. All of the major multigrid components - the smoother, the coarse level correction matrices, and the fine-to-coarse and coarse-to-fine rectangular transfer matrices, are defined in terms of various blocks of the ILU factorization. Although such a strategy is not likely to be optimal in terms of convergence properties, it has a relatively low setup cost, and therefore is useful in situations where setup costs for more traditional AMG approaches cannot be amortized over the solution of many linear systems using the same matrix. Such a situation arises in adaptive methods, where often just one linear system is solved at each step of an adaptive feedback loop, or in solving nonlinear equations by approximate Newton methods, where the approximate Jacobian might change substantially from iteration to iteration. In general terms, coarse levels are defined in terms of successively smaller lower right blocks of the matrix, typically decreasing geometrically in order. The most difficult issue was the coarse grid correction matrix. The preconditioner/smoother for a given level is just the corresponding lower right blocks of the ILU factorization. The coarse level matrix itself is just the Schur complement; this matrix is not known exactly using just the ILU decomposition in the setup phase. Thus we approximate this matrix using various combinations of the preconditioning matrix and the error matrix. During my visit, several approximations of this type were implemented and tested. While some improved the convergence rate of the overall method, these gains had to be balanced against the additional costs involved in creating and applying these matrices. By this more stringent criterion, none of the improved approximations could be characterized as an unqualified success.

Bank, R

2011-09-12T23:59:59.000Z

314

EMSL: News - Fellowships and Awards: Visiting Scientist  

NLE Websites -- All DOE Office Websites (Extended Search)

These partnerships will be acknowledged whenever possible including in EMSL annual reports and on the EMSL website. In recognition of their efforts, visiting scientists will...

315

Microsoft Word - 2010 Foreign Visit Request form  

NLE Websites -- All DOE Office Websites (Extended Search)

to submit a Foreign Visit Request. First Name Middle Initial or "NMI" Last Name Gender Date of Birth (MMDDYYYY) City of Birth Male Female Country of Birth Country...

316

Commanding general visits Pantex | National Nuclear Security...  

NLE Websites -- All DOE Office Websites (Extended Search)

Commanding general visits Pantex | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response...

317

LLNL, LANL, Sandia directors visit Russian laboratories  

NLE Websites -- All DOE Office Websites (Extended Search)

LLNL Go Home > News > News Center > Around the Lab > 073012russian 07272012 LLNL, LANL, Sandia directors visit Russian laboratories Lauren Y Devore, LLNL, (925) 422-0855,...

318

Visiting PPPL | Princeton Plasma Physics Lab  

NLE Websites -- All DOE Office Websites (Extended Search)

Join Our Mailing List A Collaborative National Center for Fusion & Plasma Research Search form Search Search Home About Overview Learn More Visiting PPPL History...

319

Argonne CNM: Preparing for Your Visit  

NLE Websites -- All DOE Office Websites (Extended Search)

Preparing for Your Visit to the Center for Nanoscale Materials Welcome to Argonne National Laboratory and the Center for Nanoscale Materials (CNM). This guide provides important...

320

Collaborative Research Visits | ORNL Neutron Sciences  

NLE Websites -- All DOE Office Websites (Extended Search)

Matter Division, Stephen Nagler Available Programs Visiting Student Thesis Research Program: Short- and long-term opportunities are available for university-based graduate...

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

The Diurnal Variation of Atlantic Ocean Tropical Cyclone aoud DistributionInferred from Geostationary Satellite Infrared Measurements  

Science Conference Proceedings (OSTI)

Satellite-measured equivalent blackbody temperatures of Atlantic Ocean tropical cyclones are used to describe the associated convection and cloud patterns. Average equivalent blackbody temperatures were developed from 538 geostationary satellite ...

Joseph Steranka; Edward B. Rodgers; R. Cecil Gentry

1984-11-01T23:59:59.000Z

322

On the Use of Two-Dimensional Incompressible Flow to Study Secondary Eyewall Formation in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Previous studies have offered hypotheses for the mechanisms that lead to secondary eyewall formation in tropical cyclones by using two-dimensional incompressible flow. Those studies represented the convection-induced vorticity field as either ...

Yumin Moon; David S. Nolan; Mohamed Iskandarani

2010-12-01T23:59:59.000Z

323

A Cumulus Parameterization for Climate Studies of the Tropical Atmosphere. Part I: Model Formulation and Sensitivity Tests  

Science Conference Proceedings (OSTI)

A scheme for parameterizing the effects of cumulus convection for the maintenance of the thermodynamic structure of the tropical atmosphere is described. This parameterization is used in a one-dimensional model that represents the vertical ...

Bruce A. Albrecht

1983-09-01T23:59:59.000Z

324

Relative Roles of Elevated Heating and Surface Temperature Gradients in Driving Anomalous Surface Winds over Tropical Oceans  

Science Conference Proceedings (OSTI)

Elevated heating by cumulus convection and sea surface temperature gradients are both thought to contribute to surface winds over tropical oceans. The relative strength and role of each mechanism is examined by imposing forcing derived from data ...

John C. H. Chiang; Stephen E. Zebiak; Mark A. Cane

2001-06-01T23:59:59.000Z

325

A Coupled Air-Sea Biennial Mechanism in the Tropical Indian and Pacific Regions: Role of the Ocean  

Science Conference Proceedings (OSTI)

Variations in the upper-ocean beat content are part of a mechanism to explain biennial signals in the tropical Indian and Pacific ocean regions. The mechanism involves modulations of the annual cycle of convection and processes of the dynamically ...

Gerald A. Meehl

1993-01-01T23:59:59.000Z

326

VisIt Now Available On Franklin  

NLE Websites -- All DOE Office Websites (Extended Search)

VisIt Supported on VisIt Supported on Cray Systems VisIt Supported on Cray Systems May 26, 2009 franklin-16b.jpg NERSC's Cray XT4 System, Franklin Scientists computing on NERSC's Cray XT4 system, called Franklin, can have it all. Now that VisIt, one of the most popular frameworks for scientific visualization, is available on Franklin, users can run their simulations on the machine and visualize the output there too. "VisIt is a very useful tool for interpreting scientific data; researchers can use this to explore data from a variety of perspectives," says Gunther Weber of the CRD Visualization Group and the NERSC Analytics Team. He notes that the tool can be used to visualize scalar and vector fields defined on two- and three-dimensional structured and unstructured meshes.

327

Physics of greenhouse effect and convection in warm Oceans  

SciTech Connect

Sea surface temperatures (SST) in roughly 50% of the tropical Pacific Ocean is warm enough (SST > 300 K) to permit deep convection. This paper examines the effects of deep convection on the climatological mean vertical distributions of water vapor and its greenhouse effect over such warm oceans. The study also examines the link between SST, vertical distribution of water vapor, and its greenhouse effect in the tropical oceans. The radiation model calculations do not include the effects of clouds. The data are grouped into nonconvective and convective categories using SST as an index for convective activity. On average, convective regions are more humid, trap significantly more longwave radiation, and emit more radiation to the sea surface. The greenhouse effect in regions of convection operates as per classical ideas, that is, as the SST increases, the atmosphere traps the excess longwave energy emitted by the surface and reradiates it locally back to the ocean surface. The important departure from the classical picture is that the net (up minus down) fluxes at the surface and at the top-of-the atmosphere decrease with an increase in SST; that is, the surface and the surface-troposphere column lose the ability to radiate the excess energy to space. The cause of this upper greenhouse effect at the surface is the rapid increase in the lower-troposphere humidity with SST; that of the column is due to a combination of increase in humidity in the entire column and increase in the lapse rate within the lower troposphere. The increase in the vertical distribution of humidity far exceeds that which can be attributed to the temperature dependence of saturation vapor pressure; that is, the tropospheric relative humidity is larger in convective regions. The positive coupling between SST and the radiative warming of the surface by the water vapor greenhouse effect is also shown to exist on interannual time scales. 35 refs., 17 figs. 4 tabs.

Inamdar, A.K.; Ramanathan, V. (Univ. of California, San Diego, La Jolla, CA (United States))

1994-05-01T23:59:59.000Z

328

Diurnal Variations and Modulation by Easterly Waves of the Size Distribution of Convective Cloud Clusters over West Africa and the Atlantic Ocean  

Science Conference Proceedings (OSTI)

Using Metecosat satellite data in the atmospheric infrared window, the authors study short time-scale fluctuations of the size distribution of tropical convective cloud clusters for July to September 1989. A cluster at a given brightness-...

L. A. Toledo Machado; J-Ph Duvel; M. Desbois

1993-01-01T23:59:59.000Z

329

The Spectrum of Convectively Coupled Kelvin Waves and the Madden–Julian Oscillation in Regions of Low-Level Easterly and Westerly Background Flow  

Science Conference Proceedings (OSTI)

The zonal wavenumber–frequency power spectrum of outgoing longwave radiation in the global tropics suggests that power in convectively coupled Kelvin waves and the Madden–Julian oscillation (MJO) is organized into two distinct spectral peaks with ...

Paul E. Roundy

2012-07-01T23:59:59.000Z

330

Convective–Stratiform Precipitation Variability at Seasonal Scale from 8 Yr of TRMM Observations: Implications for Multiple Modes of Diurnal Variability  

Science Conference Proceedings (OSTI)

This study investigates the variability of convective and stratiform rainfall from 8 yr (1998–2005) of Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) and TRMM Microwave Imager (TMI) measurements, focusing on seasonal diurnal ...

Song Yang; Eric A. Smith

2008-08-01T23:59:59.000Z

331

On the Vertical Distribution of Mean Vertical Velocities in the Convective Regions during the Wet and Dry Spells of the Monsoon over Gadanki  

Science Conference Proceedings (OSTI)

The Indian Mesosphere–Stratosphere–Troposphere (MST) radar observations of vertical distribution of mean vertical velocities w in convective regions during the wet and dry spells of the Indian summer monsoon over a tropical station at Gadanki, ...

K. N. Uma; K. Kishore Kumar; Siddarth Shankar Das; T. N. Rao; T. M. Satyanarayana

2012-02-01T23:59:59.000Z

332

The multiple vortex nature of tropical cyclogenesis  

E-Print Network (OSTI)

This thesis contains an observational analysis of the genesis of Tropical Storm Allison (2001). Using a paradigm of tropical cyclone formation as the superposition of potential vorticity (PV) anomalies, the importance of different scales of PV merger to various aspects of Allison?s formation is discussed. While only the case of Allison is discussed in great detail, other studies have also documented PV superposition on various scales, and superposition could be important for most tropical cyclones. Preceding Allison?s genesis, PV superposition on the large scale destabilized the atmosphere and increased low-level cyclonic vorticity. This presented a more favorable environment for the formation of MCV-type PV anomalies and smaller, surface-based, meso-?-scale vortices. Although these vortices eventually merged to form a more concentrated vortex with stronger surface pressure gradients, the merger happened well after landfall of Allison and no strengthening ensued. The unstable, vorticity-rich environment was also favorable for the development of even smaller, meso-?-scale vortices that accompanied deep convective cells within one of Allison?s meso-?-scale vortices. The observations herein suggest that the meso-?- scale convective cells and vortices are the respective source of PV production and building blocks for the meso-?-scale vortices. Finally, this thesis discusses issues related to the multiple vortex nature of tropical cyclone formation. For instance, the tracking of developing tropical cyclones is greatly complicated by the presence of multiple vortices. For these cases, the paradigm of a single cyclone center is inappropriate and alternative tracking methods are introduced.

Sippel, Jason Allen

2004-12-01T23:59:59.000Z

333

The cloud condensation nuclei and ice nuclei effects on tropical anvil characteristics and water vapor of the tropical tropopause layer  

SciTech Connect

Cloud anvils from deep convective clouds are of great importance to the radiative energy budget and the aerosol impact on them is the least understood. Few studies examined the effects of both cloud condensation nuclei (CCN) and ice nuclei (IN) on anvil properties and water vapor content (WVC) in the Tropical Tropopause Layer (TTL). Using a 3-dimensional cloud-resolving model with size-resolved cloud microphysics, we focus on the CCN and IN effects on cloud anvil properties and WVC in the TTL. We find that cloud microphysical changes induced by CCN/IN play a very important role in determining cloud anvil area and WVC in the TTL, whether convection is enhanced or suppressed. Also, CCN effects on anvil microphysical properties, anvil size and lifetime are much more evident relative to IN. IN has little effect on convection, but can increase ice number and mass concentrations significantly under humid conditions. CCN in the PBL is found to have greater effects on convective strength and mid-tropospheric CCN has negligible effects on convection and cloud properties. Convective transport may only moisten the main convective outflow region but the cloud anvil size determines the WVC in the TTL domain. This study shows an important role of CCN in the lower-troposphere in modifying convection, the upper-level cloud properties. It also shows the effects of IN and the PBL CCN on the upper-level clouds depends on the humidity, resolving some contradictory results in past studies. 2

Fan, Jiwen; Comstock, Jennifer M.; Ovchinnikov, Mikhail

2010-11-10T23:59:59.000Z

334

Uncertainty Quantification and Parameter Tuning in the CAM5 Zhang-McFarlane Convection Scheme and Impact of Improved Convection on the Global Circulation and Climate  

SciTech Connect

In this study, we applied an uncertainty quantification (UQ) technique to improve convective precipitation in the global climate model, the Community Atmosphere Model version 5 (CAM5), in which the convective and stratiform precipitation partitioning is very different from observational estimates. We examined the sensitivity of precipitation and circulation to several key parameters in the Zhang-McFarlane deep convection scheme in CAM5, using a stochastic importance-sampling algorithm that can progressively converge to optimal parameter values. The impact of improved deep convection on the global circulation and climate was subsequently evaluated. Our results show that the simulated convective precipitation is most sensitive to the parameters of the convective available potential energy consumption time scale, parcel fractional mass entrainment rate, and maximum downdraft mass flux fraction. Using the optimal parameters constrained by the observed Tropical Rainfall Measuring Mission, convective precipitation improves the simulation of convective to stratiform precipitation ratio and rain-rate spectrum remarkably. When convection is suppressed, precipitation tends to be more confined to the regions with strong atmospheric convergence. As the optimal parameters are used, positive impacts on some aspects of the atmospheric circulation and climate, including reduction of the double Intertropical Convergence Zone, improved East Asian monsoon precipitation, and improved annual cycles of the cross-equatorial jets, are found as a result of the vertical and horizontal redistribution of latent heat release from the revised parameterization. Positive impacts of the optimal parameters derived from the 2 simulations are found to transfer to the 1 simulations to some extent.

Yang, Ben; Qian, Yun; Lin, Guang; Leung, Lai-Yung R.; Rasch, Philip J.; Zhang, Guang J.; McFarlane, Sally A.; Zhao, Chun; Zhang, Yaocun; Wang, Hailong; Wang, Minghuai; Liu, Xiaohong

2013-01-25T23:59:59.000Z

335

Atlantic Tropical Systems of 1988  

Science Conference Proceedings (OSTI)

.The 1988 season produced 62 tropical waves, 19 tropical depressions and 12 tropical storms, 5 of which became hurricanes. Eighty-three percent of the tropical storms developed from African waves. A comparison with the past 21 years is included.

Lixion A. Avila; Gilbert B. Clark

1989-10-01T23:59:59.000Z

336

Restratification after Deep Convection  

Science Conference Proceedings (OSTI)

An important, yet poorly understood, aspect of the water mass transformation process in the ocean is the manner in which the convected fluid, once formed, is accommodated and drawn into the general circulation. Following “violent mixing” in the ...

Helen Jones; John Marshall

1997-10-01T23:59:59.000Z

337

Home Weatherization Visit | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Weatherization Visit Weatherization Visit Home Weatherization Visit Addthis Description Secretary Steven Chu visits a home that is in the process of being weatherized in Columbus, OH, along with Ohio Governor Ted Strickland and Columbus Mayor Michael Coleman. They discuss the benefits of weatherization and how funding from the recovery act is having a direct impact in communities across America. Speakers Secretary Steven Chu Duration 2:45 Topic Tax Credits, Rebates, Savings Home Weatherization Home Energy Audits Energy Sector Jobs Credit Energy Department Video SECRETARY OF ENERGY STEVEN CHU: In this weatherization program, we are - we're investing money that - so we can hire local people to do the work. You save the money. That money then goes back into the economy locally. And oh, by the way, you're not - using less energy, so that

338

Visiting Speakers Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Outreach & Collaboration » Visiting Speakers Program Outreach & Collaboration » Visiting Speakers Program Visiting Speakers Program The Visiting Speakers Program draws leaders from academia, business, public and private enterprise, and other organizations with interests similar to DOE to present on topics such as organizational theory, the business model of sustainability, resilience in challenging circumstances, and issues of global importance. By inviting presenters from a wide range of public and private sector organizations, HSS is encouraging the transformation of government and the increased efficiency and resilience of organizations to meet our agency mission and national security responsibilities. This includes understanding the depth of global issues, the need for change, the tools and steps of transformation, utilizing the most appropriate

339

Senator Murray Visits Hanford | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Senator Murray Visits Hanford Senator Murray Visits Hanford Senator Murray Visits Hanford June 26, 2013 - 12:00pm Addthis In this photo, U.S. Sen. Patty Murray (D-Wash.) receives an update on activities at C Farm from Office of River Protection (ORP) Manager Kevin Smith, left, and ORP Tank Farms Assistant Manager Tom Fletcher. In this photo, U.S. Sen. Patty Murray (D-Wash.) receives an update on activities at C Farm from Office of River Protection (ORP) Manager Kevin Smith, left, and ORP Tank Farms Assistant Manager Tom Fletcher. U.S. Sen. Patty Murray (D-Wash.) visited the Hanford site in Washington state recently, where she received an update on activities at C Farm, which is one of the groups of underground waste tanks at Hanford. Murray also toured the site's largest groundwater treatment facility. The 200 West

340

SLAC National Accelerator Laboratory - Visiting SLAC  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting SLAC Arial photo of people gathering at SLAC SLAC welcomes thousands of visitors each year from around the world. In addition to hosting scientists who come to conduct...

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Visiting Us | Y-12 National Security Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

and we will get you set up for an enjoyable visit. Office hours for Visitor Services are 6 a.m. to 4:30 p.m. EST Monday through Thursday. If you have questions or would like...

342

Visiting Faculty Program | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visiting Faculty Program Visiting Faculty Program Visiting Faculty Program December 14, 2012 12:15PM EST to January 10, 2013 5:15PM EST 14 participating DOE laboratories The Visiting Faculty Program (VFP), formerly called Faculty and Student Teams (FaST), seeks to increase the research competitiveness of faculty members and their students at institutions historically underrepresented in the research community in order to expand the workforce vital to the Department of Energy (DOE) mission areas. As part of the program, selected university/college faculty members collaborate with DOE laboratory research staff on a research project of mutual interest. Faculty member participants may invite up to two students (one of which may be a graduate student) to participate in the research project.

343

Tropical Cyclone Forecasting Applications of the GOES WMSI  

E-Print Network (OSTI)

The Geostationary Operational Environmental Satellite (GOES) sounder-derived Wet Microburst Severity Index (WMSI) was originally developed and implemented to assess the potential magnitude of convective downbursts over the central and eastern continental United States. The WMSI algorithm incorporates convective available potential energy (CAPE), to parameterize static instability, as well as the vertical theta-e (equivalent potential temperature) difference (TeD) between the surface and mid-troposphere to infer the presence of a mid-level dry air layer. It has been noted with two recent landfalling hurricanes over the Florida Gulf of Mexico coast that the GOES WMSI product accurately predicted downburst magnitude associated with convective bands and the eye wall. As a convective system, it is expected that tropical cyclones can be profilic downburst producing storms. In fact, several severe downbursts were observed in association with the pre-hurricane squall line and remnant eye wall of Hurricane Charley (Au...

Pryor, K L

2006-01-01T23:59:59.000Z

344

Title: Radar-observed convective characteristics during TWP-ICE  

NLE Websites -- All DOE Office Websites (Extended Search)

Title: Radar-observed convective characteristics during TWP-ICE Title: Radar-observed convective characteristics during TWP-ICE Schumacher, Courtney Texas A&M University Houze, Robert University of Washington May, Peter Bureau or Meteorology Research Centre Frederick, Kaycee Cetrone, Jasmine Vallgren, Andreas Category: Field Campaigns This poster will describe the radar dataset obtained in the Tropical Warm Pool International Cloud Experiment (TWP-ICE), which is to take place 20 January - 14 February 2006 in the vicinity of Darwin, Australia. We will describe the convective systems observed during the project by two scanning C-band Doppler radars, one of which will provide dual-polarization measurements, and ARM's vertically pointing cloud radar and lidar installations. In addition, we will discuss the potential for combining

345

Baroclinically Induced Tropical Cyclogenesis  

Science Conference Proceedings (OSTI)

The authors investigate the transition of numerous subtropical cyclones into late season tropical storms and hurricanes during the 2000 and 2001 Atlantic tropical cyclone seasons. In all transitioning cases (10), the 900–200-hPa wind shear was ...

Christopher A. Davis; Lance F. Bosart

2003-11-01T23:59:59.000Z

346

Tropical observability and predictability  

E-Print Network (OSTI)

Many studies have investigated tropical data assimilation in the context of global models or specifically for tropical cyclones, but relatively few have focused on the mesoscale predictability and observability of the ...

Whitcomb, Timothy Robert

2008-01-01T23:59:59.000Z

347

Secretary Chu Visits Advanced Battery Plant in Michigan, Announces...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visits Advanced Battery Plant in Michigan, Announces New Army Partnership Secretary Chu Visits Advanced Battery Plant in Michigan, Announces New Army Partnership July 18, 2011 -...

348

Secretary Chu, EM's Huizenga and Other DOE Officials Visit Catholic...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chu, EM's Huizenga and Other DOE Officials Visit Catholic University's Laboratory Secretary Chu, EM's Huizenga and Other DOE Officials Visit Catholic University's Laboratory...

349

Vice President Biden Visits National Renewable Energy Laboratory...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visits National Renewable Energy Laboratory, Announces First Agreement Under "America's Next Top Energy Innovator" Challenge Vice President Biden Visits National Renewable Energy...

350

Secretary Chu Visits Advanced Battery Plant in Michigan, Announces...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Administration Other Agencies You are here Home Secretary Chu Visits Advanced Battery Plant in Michigan, Announces New Army Partnership Secretary Chu Visits Advanced...

351

President Obama visits Argonne - March 15, 2013 | Argonne National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Obama visits Argonne On March 15, 2013, President Barack Obama visited Argonne to tour lab facilities and discuss America's energy policies during a news conference. Photo...

352

Experiment to Characterize Tropical Cloud Systems  

SciTech Connect

A major experiment to study tropical convective cloud systems and their impacts will take place around Darwin, Northern Australia in early 2006. The Tropical Warm Pool International Cloud Experiment (TWP-ICE) is a collaboration including the DOE ARM (Atmospheric Radiation Measurement) and ARM-UAV programs, NASA centers, the Australian Bureau of Meteorology, CSIRO, and universities in the USA, Australia, Japan, the UK, and Canada. TWP-ICE will be preceded in November/December 2004 by a collaborating European aircraft campaign involving the EU SCOUT-O3 and UK NERC ACTIVE projects. Detailed atmospheric measurements will be made in the Darwin area through the whole Austral summer, giving unprecedented coverage through the pre-monsoon and monsoon periods.

May, Peter T.; Mather, Jim H.; Jakob, Christian

2005-08-02T23:59:59.000Z

353

The Dynamics and Predictability of Tropical Cyclones  

E-Print Network (OSTI)

Through methodology unique for tropical cyclones in peer-reviewed literature, this study explores how the dynamics of moist convection affects the predictability of tropical cyclogenesis. Mesoscale models are used to perform short-range ensemble forecasts of a non-developing disturbance in 2004 and Hurricane Humberto in 2007; both of these cases were highly unpredictable. Taking advantage of discrepancies between ensemble members in short-range ensemble forecasts, statistical correlation is used to pinpoint sources of error in forecasts of tropical cyclone formation and intensification. Despite significant differences in methodology, storm environment and development, it is found in both situations that high convective instability (CAPE) and mid-level moisture are two of the most important factors for genesis. In the gulf low, differences in CAPE are related to variance in quasi-geostrophic lift, and in Humberto the differences are related to the degree of interaction between the cyclone and a nearby front. Regardless of the source of CAPE variance, higher CAPE and mid-level moisture combine to yield more active initial convection and more numerous and strong vortical hot towers (VHTs), which incrementally contribute to a stronger vortex. In both cases, strength differences between ensemble members are further amplified by differences in convection that are related to oceanic heat fluxes. Eventually the WISHE mechanism results in even larger ensemble spread, and in the case of Humberto, uncertainty related to the time of landfall drives spread even higher. It is also shown that initial condition differences much smaller than current analysis error can ultimately control whether or not a tropical cyclone forms. Furthermore, even smaller differences govern how the initial vortex is built. Differences in maximum winds and/or vorticity vary nonlinearly with initial condition differences and depend on the timing and intensity of small mesoscale features such as VHTs and cold pools. Finally, the strong sensitivity to initial condition differences in both cases exemplifies the inherent uncertainties in hurricane intensity prediction. This study illustrates the need for implementing advanced data analysis schemes and ensemble prediction systems to provide more accurate and event-dependent probabilistic forecasts.

Sippel, Jason A.

2008-12-01T23:59:59.000Z

354

Factors Maintaining the Zonally Asymmetric Precipitation Distribution and Low-Level Flow in the Tropics of an Atmospheric General Circulation Model: Diagnostic Studies  

Science Conference Proceedings (OSTI)

The roles played by the large-scale motion induced by vertical diffusion of heat from the lower boundary and condensational heating due to deep convection in maintaining the precipitation zones in the Tropics of an atmospheric general circulation ...

David G. Dewitt; Edwin K. Schneider; Anandu D. Vernekar

1996-08-01T23:59:59.000Z

355

Small-Scale Motions Observed by Aircraft in the Tropical Lower Stratosphere: Evidence for Mixing and its Relationship to Large-Scale Flows  

Science Conference Proceedings (OSTI)

Measurments of temperature and ozone from instrumental aircraft in the tropical lower stratosphere show the presence of small-scale disturbances generated by 1) underlying cumulus convection and 2) Kelvin-Helmholtz instability. The disturbances ...

Leonhard Pfister; Walter Starr; Roger Craig; Max Loewenstein; Marion Legg

1986-12-01T23:59:59.000Z

356

Response of Humidity and Clouds to Tropical Deep Convection  

Science Conference Proceedings (OSTI)

Currently available satellite data can be used to track the response of clouds and humidity to intense precipitation events. A compositing technique centered in space and time on locations experiencing high rain rates is used to detail the ...

Mark D. Zelinka; Dennis L. Hartmann

2009-05-01T23:59:59.000Z

357

Tropical Cyclone Intensification from Asymmetric Convection: Energetics and Efficiency  

Science Conference Proceedings (OSTI)

Prior studies of the linear response to asymmetric heating of a balanced vortex showed that the resulting intensity change could be very closely approximated by computing the purely symmetric response to the azimuthally averaged heating. The ...

David S. Nolan; Yumin Moon; Daniel P. Stern

2007-10-01T23:59:59.000Z

358

Moisture Vertical Structure, Column Water Vapor, and Tropical Deep Convection  

Science Conference Proceedings (OSTI)

The vertical structure of the relationship between water vapor and precipitation is analyzed in 5 yr of radiosonde and precipitation gauge data from the Nauru Atmospheric Radiation Measurement (ARM) site. The first vertical principal component of ...

Christopher E. Holloway; J. David Neelin

2009-06-01T23:59:59.000Z

359

Comparing Global Atmospheric Model Simulations of Tropical Convection  

NLE Websites -- All DOE Office Websites (Extended Search)

biases originating from various physical parameterizations. With realistic thermodynamic and kinematic fields captured in various weather regimes (wet, dry, and break),...

360

Radiative and Convective Driving of Tropical High Clouds  

Science Conference Proceedings (OSTI)

Using satellite cloud data from the Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) and collocated precipitation rates from the Advanced Microwave Scanning Radiometer (AMSR), it is shown that rain rate is closely related to the amount ...

Terence L. Kubar; Dennis L. Hartmann; Robert Wood

2007-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Deep Convective Rotational Solitary Waves and Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

As an extension of CCI (conditional convective instability) theory, three-dimensional, deep and steady convective waves in a barotropic basic flow with an embedded moist zone were studied via perturbation methods. The basic state is assumed to be ...

Qin Xu

1987-06-01T23:59:59.000Z

362

Unclassified Foreign National Visits & Assignments Questionnaire  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Unclassified Foreign National Visits & Assignments Questionnaire Unclassified Foreign National Visits & Assignments Questionnaire |Welcome to U.S. Department of Energy Office of Legacy Management! We are looking forward to your visit or assignment with us. In order to comply with our security requirements and ensure that your time with the Department of Energy goes smoothly we need to obtain some information from you prior to your arrival. Please take a few minutes to provide the information requested below for each member of your party that is not a U.S. citizen and then return the form(s) to your host. Please be sure to comply with the deadlines your host has communicated to you for returning this form.| |Part 1: Completed by Visitor Please complete all questions below, as applicable. | |1.|Given (first) name (exactly as it appears on passport)| |

363

Sandia National Laboratories Orientation Visit, January 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

1-04 1-04 Site: Sandia National Laboratories Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Sandia National Laboratories Dates of Activity : 01/04/2012 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the Sandia National Laboratories (SNL) and the Sandia Site Office (SSO), Albuquerque, NM, on January 4, 2012, for the HSS site lead. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the Lab's activities,

364

Convection over the Pacific Warm Pool in relation to the Atmospheric Kelvin-Rossby Wave  

Science Conference Proceedings (OSTI)

Deep convection over the western tropical Pacific warm pool is analyzed in terms of its relation to the atmospheric Kelvin–Rossby wave, which dominates the large-scale flow during the austral summer. The study uses Doppler radar data collected by ...

Robert A. Houze Jr.; Shuyi S. Chen; David E. Kingsmill; Yolande Serra; Sandra E. Yuter

2000-09-01T23:59:59.000Z

365

Scale Dependence of Solar Heating Rates in Convective Cloud Systems with Implications to General Circulation Models  

Science Conference Proceedings (OSTI)

The authors examine 3D solar radiative heating rates within tropical convective–cirrus systems to identify the scales that contribute significantly to the spatial average over a climate model’s grid cell (i.e., its grid mean), and determine their ...

A. M. Vogelmann; V. Ramanathan; I. A. Podgorny

2001-04-01T23:59:59.000Z

366

Multiscale Organization of Convection Simulated with Explicit Cloud Processes on an Aquaplanet  

Science Conference Proceedings (OSTI)

This study investigated the multiscale organization of tropical convection on an aquaplanet in a model experiment with a horizontal mesh size of 3.5 km (for a 10-day simulation) and 7 km (for a 40-day simulation). The numerical experiment used ...

Tomoe Nasuno; Hirofumi Tomita; Shinichi Iga; Hiroaki Miura; Masaki Satoh

2007-06-01T23:59:59.000Z

367

The Convective Storm Initiation Project  

Science Conference Proceedings (OSTI)

The Convective Storm Initiation Project (CSIP) is an international project to understand precisely where, when, and how convective clouds form and develop into showers in the mainly maritime environment of southern England. A major aim of CSIP is ...

Keith A. Browning; Cyril J. Morcrette; John Nicol; Alan M. Blyth; Lindsay J. Bennett; Barbara J. Brooks; John Marsham; Stephan D. Mobbs; Douglas J. Parker; Felicity Perry; Peter A. Clark; Sue P. Ballard; Mark A. Dixon; Richard M. Forbes; Humphrey W. Lean; Zhihong Li; Nigel M. Roberts; Ulrich Corsmeier; Christian Barthlott; Bernhard Deny; Norbert Kalthoff; Samiro Khodayar; Martin Kohler; Christoph Kottmeier; Stephan Kraut; Michael Kunz; Jürgen Lenfant; Andreas Wieser; Judith L. Agnew; Dave Bamber; James McGregor; Karl M. Beswick; Malcolm D. Gray; Emily Norton; Hugo M. A. Ricketts; Andrew Russell; Geraint Vaughan; Ann R. Webb; Mark Bitter; Thomas Feuerle; Rolf Hankers; Helmut Schulz; Karen E. Bozier; Chris G. Collier; Fay Davies; Catherine Gaffard; Tim J. Hewison; Darcy N. Ladd; Elizabeth C. Slack; Joe Waight; Markus Ramatschi; David P. Wareing; Robert J. Watson

2007-12-01T23:59:59.000Z

368

Convection Patterns in a Pond  

Science Conference Proceedings (OSTI)

Unusual convection patterns were observed in snow-slush an a pond in Seattle, Wash., during January 1980 and again during February 1981. The patterns are reminiscent of spoke-type convection discovered experimentally by Busse and Whitehead (1974)...

Kristina B. Katsaros

1981-10-01T23:59:59.000Z

369

NATURAL CONVECTION IN ROOM GEOMETRIES  

E-Print Network (OSTI)

that convective heat transfer processes are These computer~vective .part of the heat transfer process ? elng studled*of convect i ve heat transfer processes, the behavior of a

Gadgil, A.

2008-01-01T23:59:59.000Z

370

Analysis of the Tropical Tropopause Layer Cirrus in CALIPSO and MLS Data - A Water Perspective  

E-Print Network (OSTI)

Two mechanisms appear to be primarily responsible for the formation of cirrus clouds in Tropical Tropopause Layer (TTL): detrainment from deep convective anvils and in situ initiation. Here we propose to identify TTL cirrus clouds by analyzing water content measurements from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) and Aura Microwave Limb Sounder (MLS). Using ice water content (IWC) and water vapor (H2O) abundances we identify TTL cirrus clouds that contain too much ice to have been formed in situ — and therefore must be of convective origin. We use two methods to infer amounts of water vapor available for in situ formation. Clouds with IWC greater than this threshold are categorized as being of convective origin; clouds with IWC below the threshold are ambiguous — they could either form from in situ or still be of convective origin. Applying the thresholds from December 2008 to November 2009, we found that at least 19.2% of tropical cirrus were definitively of convective origin at the tropopause (375 K) during boreal winter. At each level, we found three maxima in the occurrence of convective cirrus: western Pacific, equatorial Africa, and South America. Averaged over the entire tropics (30oS to 30oN), we found convective cirrus occurs more frequently in boreal winter and less frequently in boreal summer, basically following the a decreasing trend from DJF, MAM, SON, to JJA. During boreal summer, we found that only 4.6% of tropical cirrus come from convection. Sensitivity tests show that the thresholds derived at 390 K have the largest uncertainty. At lower levels, especially 375 K, our thresholds are robust.

Wang, Tao

2011-05-01T23:59:59.000Z

371

Secretary Pritzker Visits the National Institute of Standards and ...  

Science Conference Proceedings (OSTI)

Secretary Pritzker Visits the National Institute of Standards and Technology's Gaithersburg, Md., Campus. August 2, 2013. ...

2013-08-05T23:59:59.000Z

372

5, 1102911054, 2005 Convective gravity  

E-Print Network (OSTI)

ACPD 5, 11029­11054, 2005 Convective gravity waves at mid-latitudes Y. G. Choi et al. Title Page Discussions Wind-profiler observations of gravity waves produced by convection at mid-latitudes Y. G. Choi1­11054, 2005 Convective gravity waves at mid-latitudes Y. G. Choi et al. Title Page Abstract Introduction

Paris-Sud XI, Université de

373

Seasonal tropical cyclone forecasts  

E-Print Network (OSTI)

Seasonal forecasts of tropical cyclone activity in various regions have been developed since the first attempts in the early 1980s by Neville

Suzana J. Camargo; Anthony G. Barnston; Philip J. Klotzbach; Christopher W. Landsea

2007-01-01T23:59:59.000Z

374

A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation  

E-Print Network (OSTI)

This dissertation uses multiple tools to investigate tropical anvil, i.e., thick, non-precipitating cloud associated with deep convection with the main objectives to provide a climatology of tropics-wide anvil properties and a better understanding of anvil formation, and to provide a more realistic assessment of the radiative impact of tropical anvil on the large-scale circulation. Based on 10 years (1998-2007) of observations, anvil observed by the Tropical Rainfall Measuring Mission (TRMM) Precipitation (PR) shows significant geographical variations, which can be linked to variations in the parent convection. Strong upper level wind shear appears to assist the generation of anvil and may further explain the different anvil statistics over land and ocean. Variations in the large-scale environment appear to play a more important role in anvil production in regions where convection regularly attains heights greater than 7 km. For regions where convection is less deep, variations in the depth of the convection and the large-scale environment likely contribute more equally to anvil generation. Anvil radiative heating profiles are estimated by extrapolating millimeter cloud radar (MMCR) radiative properties from Manus to the 10-year TRMM PR record. When the unconditional anvil areal coverage is taken into account, the anvil radiative heating becomes quite weak, increasing the PR latent heating profile by less than 1 percent at mid and upper levels. Stratiform rain and cirrus radiative heating contributions increase the upper level latent heating by 12 percent. This tropical radiative heating only slightly enhances the latent heating driven model response throughout the tropics, but more significantly over the East Pacific. These modest circulation changes suggest that previous studies may have overemphasized the importance of radiative heating in terms of Walker and Hadley circulation variations. Further, the relationship of cloud radiative heating to latent heating needs to be taken into account for more realistic studies of cloud radiative forcing on the large-scale circulation.

Li, Wei

2009-12-01T23:59:59.000Z

375

Visiting Brookhaven National Laboratory | Dark Interactions: Perspectives  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting Brookhaven Visiting Brookhaven Brookhaven National Laboratory (BNL) is located in Suffolk County on Long Island, a 120-mile-long island directly east of New York City. The Lab's 5,265-acre site is near the island's geographic center. The Lab is located in the township of Brookhaven, and has its own post office designation, Upton. The zip code is 11973-5000. From above, Long Island looks like a giant fish, with a forked tail on the "East End" -- the North Fork is rural, and the South Fork has many famous "Hamptons" resort towns. The Peconic Bay and Shelter Island are between the forks. Brookhaven is 15 miles to the west of the forks, and about 60 miles east of New York City. Aerial view of BNL - The Relativistic Heavy Ion Collider (top, center) is 2.4 miles in circumference, and dominates Brookhaven's

376

Secretary Bodman Visits Iraq | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Iraq Iraq Secretary Bodman Visits Iraq July 18, 2006 - 3:12pm Addthis Meets with Iraqi Ministers of Oil, Electricity, and Science and Technology BAGHDAD, IRAQ - U.S. Department of Energy (DOE) Secretary Samuel W. Bodman today visited Iraq to talk first hand with his counterparts, the Ministers of Oil, Electricity, and Science and Technology, and to discuss ways the Department can help them build the energy infrastructure of their nation. "The Iraqi people are showing tremendous fortitude as they move forward in building their new democracy and we, the United States, will stand with them," Secretary Bodman said. "The U.S. Department of Energy is prepared to support their efforts related to all elements of the energy sector here in Iraq, in whatever capacity they see fit."

377

LINE Commission Visits Idaho National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

LINE Commission Visits Idaho National Laboratory Members of the state of Idaho�s Leadership in Nuclear Energy (LINE) Commission recently visited the Idaho National Laboratory and related DOE-Idaho cleanup facilities. These photos show commission members at the Materials and Fuels Complex, where Steve Marschman from INL talks to the commission members, and the Advanced Mixed Waste Treatment Facility. At the AMWTP, members saw the supercompactor as Facility Manager Jeremy Hampton explained how it worked. Participants included, from top right in the INL: INL Laboratory Director John Grossenbacher; North Wind Group President Sylvia Median; former Idaho U.S. Senator Larry Craig; Idaho Department of Labor�s Dwight Johnson; BEA Government Affairs Boise Manager Brian Whitlock; and Idaho House District 33 Rep. Jeff Thompson.

378

Comparison of Methods to Determine Tropical Tropopause Layer Cirrus Formation Mechanisms  

SciTech Connect

A new method of estimating Tropical Tropopause Layer Cirrus (TTLC) formation mechanism (object method) is compared to interpretations of formation from previous studies using back trajectory calculations matched to convection identified from satellites and statistical relationships of TTLC with temperature and water vapor. The object method groups neighboring Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) TTLC cloud profiles into cloud objects and classifies them as convective (35% of TTLC) if they are directly attached to a convective cloud along the CALIPSO track. The percentage of back trajectory calculations that intersect convection (39-95% of TTLC within 5 days) depends strongly on the spatial and temporal resolution of the convection data set, and the manner in which deep convection is identified. Using minimum brightness temperature in 3 hourly, 1{sup o} resolution grid boxes to define convection, 46% of non-convective TTLC (37% of all TTLC) did not trace back to convection within 24 h. Back trajectory calculations of thin cirrus identified by the High Resolution Dynamics Limb Sounder (HIRDLS) gave similar results. Temperature is not a good proxy for formation mechanism as convective and non-convective TTLC frequencies both increase monotonically with decreasing temperature at approximately the same rate. Non-convective TTLC frequencies have a stronger relationship with relative humidity than convective TTLC frequencies, though are not sufficiently different to distinguish object method categories. A decrease in TTL cirrus frequency found at low temperatures in previous studies is caused by insufficient variability in reanalysis temperature data and is not indicative of TTLC formation mechanism.

Riihimaki, Laura D.; McFarlane, Sally A.; Liang, Calvin; Massie, Steven T.; Beagley, Nathaniel; Toth, Travis D.

2012-03-30T23:59:59.000Z

379

NATURAL CONVECTION IN PASSIVE SOLAR BUILDINGS: EXPERIMENTS, ANALYSIS AND RESULTS  

E-Print Network (OSTI)

convection process and calculate convective heat transferthat convective heat transfer processes are highly dependentheat transfer process being studied* and

Gadgil, Ashok; Bauman, Fred; Kammerud, Ronald

2008-01-01T23:59:59.000Z

380

Humidity-temperature relationships in the tropical troposphere  

SciTech Connect

Based on the observed interannual variations of water vapor and temperature over the past 26 years the authors have examined the relationship between the variations of water vapor and temperature in the tropical troposphere. In both the lower and upper troposphere, tropical mean specific humidity increases with temperature. The rate of fractional increase of specific humidity with temperature at 500 mb is as large as that in the surface boundary layer. However, the rate of fractional increase of specific humidity with temperature is significantly smaller than that given by a model with a fixed relative humidity, particularly in the region immediately above the tropical convective boundary layer. The variations of tropical mean relative humidity show consistently a negative correlation with the temperature variations. The authors have further compared the spatial structure of the specific humidity variations with that of the temperature variations. Though the vertical structure of tropical mean specific humidity has more variability than that of the tropical mean temperature, the leading EOF for the normalized specific humidity variations is almost exactly the same as the leading EOF for the normalized temperature variations. The characteristic horizontal structure of the specific humidity variations at levels in the free troposphere, however, is very different from that of the temperature variations. The leading EOF for the normalized specific humidty variations at levels in the free troposphere is characterized by regions with alternating positive and negative signs, while the leading EOF for the corresponding temperature variations has a single sign throughout the Tropics. When the variations are averaged zonally, the leading EOF for the normalized specific humidity variations still differs significantly from that of the normalized temperature variations, but the leading EOF has the same sign from the deep Tropics to the subtropics. 31 refs., 15 figs., 1 tab.

Sun, D.Z. [Princeton Univ., NJ (United States); Oort, A.H. [NOAA, Princeton, NJ (United States)

1995-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

VisIt at NERSC - 3D Scientific Visualization  

NLE Websites -- All DOE Office Websites (Extended Search)

allowing users to add data loaders or additional analysis tools to VisIt. The NERSC Analytics Group has developed extensions to VisIt to support NERSC user applications,...

382

Secretary Chu to Visit Pantex Plant Tomorrow | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Pantex Plant Tomorrow Secretary Chu to Visit Pantex Plant Tomorrow August 10, 2010 - 12:00am Addthis WASHINGTON, DC - U.S. Secretary of Energy Steven Chu will visit the Pantex...

383

Widget:AnalyticsVisitByLatLon | Open Energy Information  

Open Energy Info (EERE)

AnalyticsVisitByLatLon Jump to: navigation, search Google Analytics widget that shows visits by latlon for OpenEI. Example Output Change timeframe to... Last day Last 7 days...

384

NNSA interns visit Sandia National Laboratories | National Nuclear...  

National Nuclear Security Administration (NNSA)

interns visit Sandia National Laboratories | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

385

JGI Visiting Scientist Program The DOE Joint Genome Institute Visiting Scientist Program (VSP)  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting Scientist Program Visiting Scientist Program The DOE Joint Genome Institute Visiting Scientist Program (VSP) provides an opportunity for researchers who are seeking to build upon their line of scientific inquiry by leveraging JGI experimental, computational, and personnel resources for genomic research and sequence-based science. Projects include de novo generation of genome data, assistance in interpreting and/or building on an existing data set, or the refining of new technology (e.g., single-cell genomics; metagenomics, etc.). Length of stay depends on complexity of the project being considered and availability of data and other resources. Investigators, post docs, and graduate students participating in approved JGI User Projects are also invited to apply for on-site access to JGI

386

CAPE in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Convective available potential energy (CAPE) and the vertical distribution of buoyancy were calculated for more than 2000 dropsonde soundings collected by the NOAA Gulfstream-IV aircraft. Calculations were done with and without the effects of ...

John Molinari; David M. Romps; David Vollaro; Leon Nguyen

2012-08-01T23:59:59.000Z

387

Convective Modifications of a Geostrophic Eddy Field  

Science Conference Proceedings (OSTI)

Ocean convection often occurs in regions of mesoscale eddy activity, where convective mixing and geostrophic eddy dynamics interact. The authors examine the interactions between a group of geostrophic eddies and convective mixing induced by ...

Sonya Legg; James C. McWilliams

2001-04-01T23:59:59.000Z

388

Nuclear Energy Advisory Committee Facility Subcommittee visit to Oak Ridge  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Committee Facility Subcommittee visit to Committee Facility Subcommittee visit to Oak Ridge National Laboratory Nuclear Energy Advisory Committee Facility Subcommittee visit to Oak Ridge National Laboratory The NEAC Facilities Subcommittee made a site visit to Oak Ridge National Laboratory (ORNL) on August 26, 2010. Subcommittee members included John Ahearne (Vice Chairman of NEAC and Facilities Subcommittee Chairman), Dana Christensen (ORNL), Thomas B. Cochran (Natural Resources Defense Council), Michael Corradini, (University of Wisconsin-Madison), and Andrew Klein (Oregon State University). Tansel Selekler (Department of Energy Office of Nuclear Energy) accompanied the Subcommittee. NEAC_Facitlity_Subcom Visit_OakRidge.pdf More Documents & Publications Meeting Materials: December 9, 2010

389

Applications Now Open: Learn About the Visiting Faculty Program |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Applications Now Open: Learn About the Visiting Faculty Program Applications Now Open: Learn About the Visiting Faculty Program Applications Now Open: Learn About the Visiting Faculty Program December 4, 2012 - 2:00pm Addthis Applications are now open for the Office of Science's Visiting Faculty Program. Applications are now open for the Office of Science's Visiting Faculty Program. Applications are being accepted now through January 10, 2013, for the Visiting Faculty Program, which hosts university and college faculty members at Energy Department Laboratories to collaborate on research projects during a ten-week summer term. From May through August, participants selected for the Visiting Faculty Program will be hosted at one of 14 National Laboratories across the country. Participants are offered different research opportunities, and

390

Improving Convective Parameterization Using ARM Data  

NLE Websites -- All DOE Office Websites (Extended Search)

Convective Parameterization Using ARM Data G. J. Zhang Center for Atmospheric Sciences Scripps Institution of Oceanography La Jolla, California Introduction Convective...

391

TWP-ICE Global Atmospheric Model Intercomparison: Convection Responsiveness and Resolution Impact  

SciTech Connect

Results are presented from an intercomparison of global atmospheric model (GAM) simulations of tropical convection during the Tropical Warm Pool-International Cloud Experiment (TWP-ICE). The distinct cloud properties, precipitation, radiation, and vertical diabatic heating profiles associated with three different monsoon regimes (wet, dry, and break) from available observations are used to evaluate 9 GAM forecasts initialized daily from realistic global analyses. All models well captured the evolution of large-scale circulation and the thermodynamic fields, but cloud properties differed substantially among models. For example, liquid water path and ice water path differed by up to two orders of magnitude. Compared with the relatively well simulated top-heavy heating structures during the wet and break period, most models had difficulty in depicting the bottom-heavy heating profiles associated with cumulus congestus. The best performing models during this period were the ones whose convection scheme was most responsive to the free tropospheric humidity. Compared with the large impact of cloud and convective parameterizations on model cloud and precipitation characteristics, resolution has relatively minor impact on simulated cloud properties. However, one feature that was influence by the resolution study in several models was the diurnal cycle of precipitation. Peaking at a different time from convective precipitation, large-scale precipitation generally increases in high resolution forecasts and modulates the total precipitation diurnal cycle. Overall, the study emphasizes the importance of more environmental responsive convective parameterizations to capture various types of convection and the substantial diversity among large-scale cloud and precipitation schemes in current GAMs. This experiment has also demonstrated itself to be a very useful testbed for those developing cloud and convection schemes in these models.

Lin, Yanluan; Donner, Leo J.; Petch, Jon C.; Bechtold, P.; Boyle, James; Klein, Stephen A.; Komori, T.; Wapler, K.; Willett, M.; Xie, X.; Zhao, M.; Xie, Shaocheng; McFarlane, Sally A.; Schumacher, Courtney

2012-05-08T23:59:59.000Z

392

Liquid convective diodes  

DOE Green Energy (OSTI)

Liquid convective diodes are analyzed by experiments and theory. The experiments include flow visualization and temperature measurements. The dynamic behavior of a diode is analyzed and explained. Performance of three diodes of different designs that were installed in a test cell this past winter showed an average 50% thermal efficiency over a three-month period. If only the performance of the most efficient diode among the three is considered, it is expected that this figure may be increased to 60% or possibly 65% with some design improvements. A simple analytical model, which was developed earlier, is discussed. A comparison of reservoir temperatures from one of the test cell diodes with predicted temperatures from the model showed excellent agreement. The good agreement indicates that the model contains the elements that are necessary to accurately predict site-specific diode performance.

Jones, G.F.

1984-01-01T23:59:59.000Z

393

A Tropical Cyclone Genesis Parameter for the Tropical Atlantic  

Science Conference Proceedings (OSTI)

A parameter to evaluate the potential for tropical cyclone formation (genesis) in the North Atlantic between Africa and the Caribbean islands is developed. Climatologically, this region is the source of about 40% of the Atlantic basin tropical ...

Mark DeMaria; John A. Knaff; Bernadette H. Connell

2001-04-01T23:59:59.000Z

394

A Numerical Simulation of Convectively Induced Turbulence above Deep Convection  

Science Conference Proceedings (OSTI)

At 1034 UTC 2 September 2007, a commercial aircraft flying from Jeju, South Korea, to Osaka, Japan, at an altitude of approximately 11.2 km encountered severe turbulence above deep convection. To investigate the characteristics and generation ...

Jung-Hoon Kim; Hye-Yeong Chun

2012-06-01T23:59:59.000Z

395

Convection in pulsating stars. II. RR Lyrae convection and stability  

Science Conference Proceedings (OSTI)

Convective model envelopes of two RR Lyrae stars are constructed, one centrally located in the instability strip, and one just beyond the red edge of the stip. Steady state solutions and small amplitude oscillations are studied using a nonlinear pulsation code. We find that convection has only a small effect on the stability of the hotter model, primarily due to turbulent pressure work (net driving) in the hydrogen ionization zone. The cooler model, however, shows strong reduction in both hydrogen and helium ionization driving, which quenches the pulsation. This effect is not directly attributable to convective PdV work, but probably reflects changes in structure and phase relations in the envelope due to convection.

Stellingwerf, R.F.

1982-11-01T23:59:59.000Z

396

Idealized Mesoscale Convective System Structure and Propagation Using Convective Parameterization  

Science Conference Proceedings (OSTI)

The development and propagation of mesoscale convective systems (MCSs) was examined within the Weather Research and Forecasting (WRF) model using the Kain–Fritsch (KF) cumulus parameterization scheme and a modified version of this scheme. ...

James Correia Jr.; Raymond W. Arritt; Christopher J. Anderson

2008-07-01T23:59:59.000Z

397

Heat distribution by natural convection  

DOE Green Energy (OSTI)

Natural convection between spaces in a building can play a major role in energy transfer. Two situations are investigated: convection through a single doorway into a remote room, and a convective loop in a two-story house with a south sunspace where a north stairway serves as the return path. A doorway-sizing equation is given for the single-door case. Detailed data are given from the monitoring of airflow in one two-story house and summary data are given for five others. Observations on the nature of the airflow and design guidelines are presented.

Balcomb, J.D.; Yamaguchi, K.

1983-01-01T23:59:59.000Z

398

Paducah Site Hosts Governor's Scholars Visit | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Hosts Governor's Scholars Visit Site Hosts Governor's Scholars Visit Paducah Site Hosts Governor's Scholars Visit August 1, 2012 - 12:00pm Addthis Kentucky Governor’s Scholars pose before boarding a bus during their Paducah site visit this summer. Kentucky Governor's Scholars pose before boarding a bus during their Paducah site visit this summer. PADUCAH, Ky. - Nineteen of Kentucky's brightest teenagers visited the Paducah site this summer to learn more about environmental cleanup and waste management. "We're here exploring what we do with the waste we produce," said Melanie Kidwell, a faculty member of the Kentucky Governor's Scholars Program. Representatives of DOE cleanup contractor LATA Kentucky led the group in a presentation and discussion about the site. Scholars then took a bus tour

399

Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Paducah Site Office (PAD) from July 25-27, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's activities, and to determine how HSS can carry out its independent oversight and mission support responsibilities. Orientation Visit to the Paducah Gaseous Diffusion Plant, July 2011 More Documents & Publications Independent Activity Report, Portsmouth Gaseous Diffusion Plant - August

400

Energy Secretary to Visit Georgia Nuclear Reactor Site and Tennessee...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Nuclear Reactor Site and Tennessee Laboratory to Highlight Administration Support for Nuclear Energy Energy Secretary to Visit Georgia Nuclear Reactor Site and Tennessee...

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

SunShot Initiative: Visiting the SunShot Office  

NLE Websites -- All DOE Office Websites (Extended Search)

About About Printable Version Share this resource Send a link to SunShot Initiative: Visiting the SunShot Office to someone by E-mail Share SunShot Initiative: Visiting the SunShot Office on Facebook Tweet about SunShot Initiative: Visiting the SunShot Office on Twitter Bookmark SunShot Initiative: Visiting the SunShot Office on Google Bookmark SunShot Initiative: Visiting the SunShot Office on Delicious Rank SunShot Initiative: Visiting the SunShot Office on Digg Find More places to share SunShot Initiative: Visiting the SunShot Office on AddThis.com... Accomplishments Visiting the SunShot Office Fellowships Postdoctoral Research Contacts Visiting the SunShot Office Photo of the exterior front of 950 L'Enfant Plaza. The entryway is lined with a row of trees and lamp posts. In the foreground is an open space that is bricked and cemented.

402

CTBTO Officials Visit DOE Labs and NNSA HQ | National Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

CTBTO Officials Visit DOE Labs and NNSA HQ | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

403

Swedish Delegation Visits DOE's National Renewable Energy Lab...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Minister visited NREL's Alternative Fuels User Facility (AFUF), which houses the bioethanol pilot plant and other ethanol processing facilities. The AFUF allows users to test...

404

Bruce Held visits Y-12 National Security Complex | National Nuclear...  

NLE Websites -- All DOE Office Websites (Extended Search)

Held visits Y-12 National Security Complex | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy...

405

Richmond's Kennedy High Visits NERSC- NERSC Center News, Feb...  

NLE Websites -- All DOE Office Websites (Extended Search)

High School's TechFutures Academy paid a visit to the National Energy Research Scientific Computing Center (NERSC) at the Berkeley Lab's Oakland Science Facility on February...

406

Sandia Weapon Intern Program visits KCP | National Nuclear Security...  

NLE Websites -- All DOE Office Websites (Extended Search)

Participants in Sandia's Weapon Intern Program recently visited and toured NNSA's Kansas City Plant. The program, established in 1998, was created to meet Sandia's changing mission...

407

Winner of AAAS Science Education Prize Visits Argonne  

NLE Websites -- All DOE Office Websites (Extended Search)

Overview Visiting the APS Mission & Goals Find People Organization Charts Committees Job Openings User Information Prospective Users New Users Current Users APS User Portal...

408

Australia and New Zealand dignitaries visit Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Australian and New Zealand dignitaries visit Advanced Photon Source A high-level Australian delegation led by the State of Victoria's Treasurer and Innovation Minister John Brumby...

409

Secretary Chu Visits Russian Seaport, Checks Out Second Line...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Russian Seaport, Checks Out Second Line of Defense Nuclear Detection System Secretary Chu Visits Russian Seaport, Checks Out Second Line of Defense Nuclear Detection System June 7,...

410

Defense Nuclear Facilitiets Safety Board Visit and Site Lead...  

NLE Websites -- All DOE Office Websites (Extended Search)

Office of Safety and Emergency Management Evaluations Activity Report for the Defense Nuclear Facilities Safety Board Visit and Site Lead Planning Activities at the Los Alamos...

411

Site Visit Report, Paducah - March 2010 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Report, Paducah - March 2010 Site Visit Report, Paducah - March 2010 March 2010 Review of Work PlanningExecution and the Employee Concerns Program at Paducah This report documents...

412

Application of the 85 GHz ice scattering signature to a global study of mesoscale convective systems  

E-Print Network (OSTI)

It has long been observed that tropical convection tends to cluster, organizing into multicellular mesoscale convective systems (MCS), In convective towers, updrafts on the order of 10 m s-I favor the formation of large, precipitation-sized ice, which strongly scatters upwelling 85 GHz radiation. The 85 GHz brightness temperature is related to the amount of ice in an MCS and, indirectly, to the strength of the updrafts producing the ice. This study used an objective technique to identify MCSs from the Special Sensor Microwave/Imager's 85 GHz channel to describe the size, intensity, and geographic distribution of MCSs between 35'N and 35'S for January, April, July, and October 1993. An MCS was defined as an area at least 2000 km 2 of 85 GHz polarization corrected brightness temperatures 1 0 5 @) MCSS. Over the oceans, median brightness temperature depression was 20-30 K below 225 K, while over land, it was 35-45 K below 225 K. Tropical Africa had the coldest median minimum brightness temperature. The sub-tropical oceans had the warmest median minimum brightness temperatures. MCSs were 35% more frequent over the oceans at sunrise than at sunset, and 60% more frequent over tropical continents at sunset than at sunrise. Both continental and oceanic MCSs tended to be larger at sunrise than at sunset. Continental MCSs tended to be colder at sunset than at sunrise, but oceanic MCSs tended to be marginally colder at sunrise than at sunset. In general, continental MCSs appeared to be smaller and more intense than oceanic MCSS, and the largest and the most intense MCSs occurred more frequently in the sub-tropics.

Devlin, Karen Irene

1995-01-01T23:59:59.000Z

413

Mesoscale Convective Complexes in Africa  

Science Conference Proceedings (OSTI)

Digitized full-disk infrared satellite imagery from the European geostationary satellite (Meteosat) for 1986 and 1987 was used to construct a climatology of mesoscale convective complexes (MCCs) in Africa One hundred ninety-five systems formed ...

Arlene G. Laing; J. Michael Fritsch

1993-08-01T23:59:59.000Z

414

Isentropic Analysis of Convective Motions  

Science Conference Proceedings (OSTI)

This paper analyzes the convective mass transport by sorting air parcels in terms of their equivalent potential temperature to determine an isentropic streamfunction. By averaging the vertical mass flux at a constant value of the equivalent ...

Olivier M. Pauluis; Agnieszka A. Mrowiec

2013-11-01T23:59:59.000Z

415

Integral Effects of Deep Convection  

Science Conference Proceedings (OSTI)

The large-scale, integral effect of convective elements (plumes) constituting an open-ocean chimney is investigated both theoretically and with a plume-resolving numerical model. The authors consider an initially homogeneous “patch” of ocean of ...

Uwe Send; John Marshall

1995-05-01T23:59:59.000Z

416

The Decay of Convective Turbulence  

Science Conference Proceedings (OSTI)

Using simulations with a large-eddy model we have studied the decay of convective turbulence in the atmospheric boundary layer when the upward surface sensible heat flux is suddenly stopped. The decay of turbulent kinetic energy and temperature ...

F. T. M. Nieuwstadt; R. A. Brost

1986-03-01T23:59:59.000Z

417

Convective heat flow probe  

DOE Patents (OSTI)

A convective heat flow probe device is provided which measures heat flow and fluid flow magnitude in the formation surrounding a borehole. The probe comprises an elongate housing adapted to be lowered down into the borehole; a plurality of heaters extending along the probe for heating the formation surrounding the borehole; a plurality of temperature sensors arranged around the periphery of the probe for measuring the temperature of the surrounding formation after heating thereof by the heater elements. The temperature sensors and heater elements are mounted in a plurality of separate heater pads which are supported by the housing and which are adapted to be radially expanded into firm engagement with the walls of the borehole. The heat supplied by the heater elements and the temperatures measured by the temperature sensors are monitored and used in providing the desired measurements. The outer peripheral surfaces of the heater pads are configured as segments of a cylinder and form a full cylinder when taken together. A plurality of temperature sensors are located on each pad so as to extend along the length and across the width thereof, with a heating element being located in each pad beneath the temperature sensors. An expansion mechanism driven by a clamping motor provides expansion and retraction of the heater pads and expandable packet-type seals are provided along the probe above and below the heater pads.

Dunn, J.C.; Hardee, H.C.; Striker, R.P.

1984-01-09T23:59:59.000Z

418

Heating, Moisture, and Water Budgets of Tropical and Midlatitude Squall Lines: Comparisons and Sensitivity to Longwave Radiation  

Science Conference Proceedings (OSTI)

A two-dimensional, time-dependent, and nonhydrostatic numerical cloud model is used to estimate the heating (Q1, moisture (Q2), and water budgets in the convective and stratiform regions for a tropical and a midlatitude squall line (EMEX and PRE-...

W. -K. Tao; J. Simpson; C. H. Sui; B. Ferrier; S. Lang; J. Scala; M. D. Chou; K. Pickering

1993-03-01T23:59:59.000Z

419

A Probabilistic Bulk Model of Coupled Mixed Layer and Convection. Part II: Shallow Convection Case  

Science Conference Proceedings (OSTI)

The probabilistic bulk convection model (PBCM) developed in a companion paper is here extended to shallow nonprecipitating convection. The PBCM unifies the clear-sky and shallow convection boundary layer regimes by obtaining mixed-layer growth, ...

Pierre Gentine; Alan K. Betts; Benjamin R. Lintner; Kirsten L. Findell; Chiel C. van Heerwaarden; Fabio D’Andrea

2013-06-01T23:59:59.000Z

420

The Impacts of Convective Parameterization and Moisture Triggering on AGCM-Simulated Convectively Coupled Equatorial Waves  

Science Conference Proceedings (OSTI)

This study examines the impacts of convective parameterization and moisture convective trigger on convectively coupled equatorial waves simulated by the Seoul National University (SNU) atmospheric general circulation model (AGCM). Three different ...

Jia-Lin Lin; Myong-In Lee; Daehyun Kim; In-Sik Kang; Dargan M. W. Frierson

2008-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

The physics of tropical cyclone formation is not well understood, and more is known about the mature hurricane than the formative mechanisms that produce it. It is believed part of the reason for this can be traced to insufficient upper-level ...

Michael T. Montgomery; Brian F. Farrell

1993-01-01T23:59:59.000Z

422

Tropical Cyclone Cloudbands  

Science Conference Proceedings (OSTI)

The outer cloudband structure of a tropical cyclone is kinematically treated as the manifestation of a forced set of waves stationary with respect to the cyclone. When the cyclone wind field is modeled as a Rankine vortex and the cloudbands are ...

Tom Beer; L. Giannini

1980-07-01T23:59:59.000Z

423

Tropical Cyclone Eye Thermodynamics  

Science Conference Proceedings (OSTI)

In intense tropical cyclones, sea level pressures at the center are 50–100 hPa lower than outside the vortex, but only 10–30 hPa of the total pressure fall occurs inside the eye between the eyewall and the center. Warming by dry subsidence ...

H. E. Willoughby

1998-12-01T23:59:59.000Z

424

Tropical Cyclone Eye Dynamics  

Science Conference Proceedings (OSTI)

A new perspective of the dynamics of a tropical cyclone eye is given in which eye subsidence and the adiabatic warming accompanying it are accounted for directly from the equations of motion. Subsidence is driven by an adverse, axial gradient of ...

R. K. Smith

1980-06-01T23:59:59.000Z

425

Energy Secretary Steven Chu to Visit Memphis | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Secretary Steven Chu to Visit Memphis Energy Secretary Steven Chu to Visit Memphis Energy Secretary Steven Chu to Visit Memphis January 26, 2011 - 12:00am Addthis WASHINGTON, DC - Tomorrow, January 27th U.S. Secretary of Energy Steven Chu will travel to Memphis, Tenn. to visit Sharp Solar Manufacturing Plant and FedEx Memphis Superhub. The visit comes two days after President Obama outlined in his State of the Union speech his vision for a new clean energy economy. At Sharp Solar, Secretary Chu will review the company's innovative solar manufacturing techniques that provide clean energy power and job creation for Memphis residents. While at FedEx, Secretary Chu will tour the Superhub and participate in an electric vehicle demonstration. Sharp Solar Event WHAT: Secretary Steven Chu Tours Sharp Solar Manufacturing Plant

426

Secretary Chu to Visit Pantex Plant Tomorrow | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Chu to Visit Pantex Plant Tomorrow Secretary Chu to Visit Pantex Plant Tomorrow Secretary Chu to Visit Pantex Plant Tomorrow August 10, 2010 - 12:00am Addthis WASHINGTON, DC - U.S. Secretary of Energy Steven Chu will visit the Pantex Plant tomorrow, Wednesday, August 11. The Pantex Plant is part of the Department of Energy's National Nuclear Security Administration. In addition to touring the plant, Secretary Chu will participate in briefings with technical experts and participate in an all hands meeting with plant employees. Secretary Chu will be accompanied by NNSA Administrator Tom D'Agostino. Secretary Chu and Administrator D'Agostino will participate in a media availability following the Secretary's visit at 4:15 p.m. For more information on media logistics, contact Brenda Finley at (806)

427

Sandia Weapon Intern Program visits KCP | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Weapon Intern Program visits KCP | National Nuclear Security Weapon Intern Program visits KCP | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Sandia Weapon Intern Program visits KCP Sandia Weapon Intern Program visits KCP Posted By Office of Public Affairs Participants in Sandia's Weapon Intern Program recently visited and

428

U.S. Energy Secretary Visits Qatar | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Qatar Qatar U.S. Energy Secretary Visits Qatar November 15, 2005 - 2:42pm Addthis Includes tour of Ras Laffan Industrial City and Port, opening of GE corporate office building, a visit to Education City, and time spent thanking U.S. troops DOHA, QATAR - U.S. Secretary of Energy Samuel W. Bodman today concluded a two-day visit to Qatar by participating in the announcement of Ras Laffan Liquefied Natural Gas Company III (RasGas III), visiting Qatar's Education City, and eating lunch with U.S. troops stationed at Camp Al Sayliyah. On November 14, Secretary Bodman and his delegation toured the Ras Laffan Industrial City and Port in Qatar. Ras Laffan Port is the world's largest liquefied natural gas (LNG) exporting port. The visit to Industrial City preceded today's official opening of Ras

429

Secretary Bodman Visits Alberta, Canada | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Bodman Visits Alberta, Canada Secretary Bodman Visits Alberta, Canada Secretary Bodman Visits Alberta, Canada July 14, 2006 - 3:09pm Addthis Tour of Oil Sands and Bilateral Meetings Highlight Importance of Strong Relationship between U.S. and Canada CALGARY, ALBERTA - U.S. Secretary of Energy Samuel W. Bodman concluded his two-day visit to Canada today by participating in bilateral and private industry energy discussions in Alberta, Canada. Yesterday, Secretary Bodman toured the oil sands in Fort McMurray, Alberta, Canada with Canadian Natural Resources Minister Gary Lunn, Alberta Premier Ralph Klein, and Alberta Energy Minister Greg Melchin. During his visit to Alberta, Secretary Bodman encouraged the development of oil sands and other unconventional oil resources, supported increasing

430

Lempke visits Savannah River Site | National Nuclear Security  

National Nuclear Security Administration (NNSA)

visits Savannah River Site | National Nuclear Security visits Savannah River Site | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Lempke visits Savannah River Site Lempke visits Savannah River Site Posted By Office of Public Affairs NNSA Associate Principal Deputy Administrator Michael Lempke recently visited the Savannah River Site, getting an up-close look at facilities

431

Site Visit Report, Livermore Site Office - February 2011 | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 Site Visit Report, Livermore Site Office - February 2011 February 2011 Livermore Site Office Safety Basis Self-Assessment This site visit report documents the collective results of the Office of Health, Safety and Security's (HSS) assessment of National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. The assessment was sponsored by LSO as a self-assessment and conducted jointly by HSS and LSO staff. It was completed in late 2010 and included site visits from November 29 - December

432

August 1, 2005: Bodman visits Oak Ridge | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2005: Bodman visits Oak Ridge 2005: Bodman visits Oak Ridge August 1, 2005: Bodman visits Oak Ridge August 1, 2005: Bodman visits Oak Ridge August 1, 2005 Secretary Bodman visits (pdf) DOE's Oak Ridge National Laboratory to tour the facility and host an all-hands meeting with lab employees. The Secretary tells the employees that he is pleased and enthusiastic, on the whole, with the Energy Policy Act, particularly in that it has measures to encourage more nuclear energy generation. When asked what methods of generation he would stress if he were an energy executive, he replies "nuclear," and then, "solar." Although noting some reservations about the viability of hydrogen and fuel cell technologies as energy alternatives, the Secretary stresses the need for energy research. "We will," he says,

433

Tropical Warm Pool International Cloud Experiment (TWP-ICE): Cloud and Rain Characteristics in the Australian Monsoon  

SciTech Connect

The impact of oceanic convection on its environment and the relationship between the characteristics of the convection and the resulting cirrus characteristics is still not understood. An intense airborne measurement campaign combined with an extensive network of ground-based observations is being planned for the region near Darwin, Northern Australia, during January-February, 2006, to address these questions. The Tropical Warm Pool – International Cloud Experiment (TWP-ICE) will be the first field program in the tropics that attempts to describe the evolution of tropical convection, including the large scale heat, moisture, and momentum budgets, while at the same time obtaining detailed observations of cloud properties and the impact of the clouds on the environment. The emphasis will be on cirrus for the cloud properties component of the experiment. Cirrus clouds are ubiquitous in the tropics and have a large impact on their environment but the properties of these clouds are poorly understood. A crucial product from this experiment will be a dataset suitable to provide the forcing and testing required by cloud-resolving models and parameterizations in global climate models. This dataset will provide the necessary link between cloud properties and the models that are attempting to simulate them. The experiment is a collaboration between the U.S. Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program, the Bureau of Meteorology (BoM), the National Aeronautics and Space Administration (NASA), the European Commission DG RTD-1.2, and several United States, Australian, Canadian, and European Universities. This experiment will be undertaken over a 4-week period in early 2006. January and February corresponds to the wet phase of the Australia monsoon. This season has been selected because, despite Darwin’s coastal location, the convection that occurs over and near Darwin at this time is largely of maritime origin with a large fetch over water. Based on previous experiments, the convection appears typical of maritime convection with widespread convection that has complex organization, but is not as deep or as intense as continental or coastal convection. Therefore, it is expected that the convection and cloud characteristics will be representative of conditions typical for wide areas of the tropics.

PT May; C Jakob; JH Mather

2004-05-30T23:59:59.000Z

434

Convection-Allowing and Convection-Parameterizing Ensemble Forecasts of a Mesoscale Convective Vortex and Associated Severe Weather Environment  

Science Conference Proceedings (OSTI)

An analysis of a regional severe weather outbreak that was related to a mesoscale convective vortex (MCV) is performed. The MCV-spawning mesoscale convection system (MCS) formed in northwest Kansas along the southern periphery of a large cutoff ...

Adam J. Clark; William A. Gallus Jr.; Ming Xue; Fanyou Kong

2010-08-01T23:59:59.000Z

435

ARM - Midlatitude Continental Convective Clouds  

Science Conference Proceedings (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Mary Jane Bartholomew; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

2012-01-19T23:59:59.000Z

436

ARM - Midlatitude Continental Convective Clouds  

DOE Data Explorer (OSTI)

Convective processes play a critical role in the Earth's energy balance through the redistribution of heat and moisture in the atmosphere and their link to the hydrological cycle. Accurate representation of convective processes in numerical models is vital towards improving current and future simulations of Earths climate system. Despite improvements in computing power, current operational weather and global climate models are unable to resolve the natural temporal and spatial scales important to convective processes and therefore must turn to parameterization schemes to represent these processes. In turn, parameterization schemes in cloud-resolving models need to be evaluated for their generality and application to a variety of atmospheric conditions. Data from field campaigns with appropriate forcing descriptors have been traditionally used by modelers for evaluating and improving parameterization schemes.

Mike Jensen; Mary Jane Bartholomew; Anthony Del Genio; Scott Giangrande; Pavlos Kollias

437

Tropical Western Pacific  

NLE Websites -- All DOE Office Websites (Extended Search)

ARM-00-005 ARM-00-005 RPT(TWP)-010.006 LA-UR-004434 Tropical Western Pacific Site Science Mission Plan July - December 2000 Prepared for the U.S. Department of Energy under Contract W-7405-ENG-36 Tropical Western Pacific Project Office Atmospheric and Climate Sciences Group (EES-8) Earth and Environmental Sciences Division Los Alamos National Laboratory Los Alamos, NM 87545 This report and previous versions are available electronically at the following web sites: http://www.arm.gov/docs/sites/twp/science_plan/archive.html http://www.twppo.lanl.gov/docs/office.html 2 DISCLAIMER This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor an agency thereof, nor any of their employees, makes any warranty, expresses or

438

Organizational Modes of Midlatitude Mesoscale Convective Systems  

Science Conference Proceedings (OSTI)

This paper discusses common modes of mesoscale convective organization. Using 2-km national composite reflectivity data, the authors investigated linear mesoscale convective systems (MCSs) that occurred in the central United States during May ...

Matthew D. Parker; Richard H. Johnson

2000-10-01T23:59:59.000Z

439

Predicting the Movement of Mesoscale Convective Complexes  

Science Conference Proceedings (OSTI)

A procedure for operationally predicting the movement of the mesobeta-scale convective elements responsible for the heavy rain in mesocale convective complexes is presented. The procedure is based on the well-known concepts that the motion of ...

S. F. Corfidi; J. H. Meritt; J. M. Fritsch

1996-03-01T23:59:59.000Z

440

Helicity and Thermal Convection with Shear  

Science Conference Proceedings (OSTI)

The relations between nonlinear energy transport and helicity of the flow are studied through simulations of thermal convection with mean shear. Parallel-plate convection with a rotating mean shear, a linear undirectional shear, a parabolic ...

Wan-Shu Wu; Douglas K. Lilly; Robert M. Kerr

1992-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Preconditioning Deep Convection with Cumulus Congestus  

Science Conference Proceedings (OSTI)

Recent studies have pushed forward the idea that congestus clouds, through their moistening of the atmosphere, could promote deep convection. On the other hand, older studies have tended to relate convective initiation to the large-scale forcing. ...

Cathy Hohenegger; Bjorn Stevens

2013-02-01T23:59:59.000Z

442

A Transilient Matrix for Moist Convection  

Science Conference Proceedings (OSTI)

A method is introduced for diagnosing a transilient matrix for moist convection. This transilient matrix quantifies the nonlocal transport of air by convective eddies: for every height z, it gives the distribution of starting heights z? for the ...

David M. Romps; Zhiming Kuang

2011-09-01T23:59:59.000Z

443

Energy Secretary to Visit Georgia Nuclear Reactor Site and Tennessee  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary to Visit Georgia Nuclear Reactor Site and Secretary to Visit Georgia Nuclear Reactor Site and Tennessee Laboratory to Highlight Administration Support for Nuclear Energy Energy Secretary to Visit Georgia Nuclear Reactor Site and Tennessee Laboratory to Highlight Administration Support for Nuclear Energy February 13, 2012 - 6:16pm Addthis WASHINGTON, D.C. - U.S. Secretary of Energy Secretary Steven Chu will visit the Vogtle nuclear power plant in Waynesboro, Georgia, and Oak Ridge National Laboratory on Wednesday, February 15 to highlight steps the Obama Administration is taking to restart America's nuclear energy industry. In Waynesboro, Secretary Chu will join Southern Company CEO Thomas A. Fanning, Georgia Power CEO W. Paul Bowers, and local leaders for a tour of Vogtle units 3 and 4 -- the site of the first two new nuclear power units

444

Secretary Bodman Begins Australia Visit | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Begins Australia Visit Begins Australia Visit Secretary Bodman Begins Australia Visit January 11, 2006 - 10:24am Addthis Two day trip highlighted by Asia-Pacific Partnership inaugural meeting SYDNEY, AUSTRALIA - Secretary of Energy Samuel W. Bodman on Wednesday began a two day visit to Australia where he will lead the United States delegation to the inaugural meeting of the Asia-Pacific Partnership for Clean Development and Climate (APP). The APP brings together governments and private sector entities from Australia, China, India, Japan, South Korea and the United States to encourage the deployment of clean energy technologies and international cooperation in eight areas: cleaner fossil energy; renewable and distributed generation; power generation and transmission; aluminum; steel; cement; buildings and appliances; and

445

Vice President Biden to Visit National Renewable Energy Laboratory in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vice President Biden to Visit National Renewable Energy Laboratory Vice President Biden to Visit National Renewable Energy Laboratory in Colorado Vice President Biden to Visit National Renewable Energy Laboratory in Colorado May 18, 2011 - 12:00am Addthis Washington, D.C. - On Friday, May 20th, Vice President Joe Biden will travel to Golden, Colorado, to visit the National Renewable Energy Laboratory (NREL). At 11:15 AM MT, the Vice President will deliver remarks on the Administration's commitment to encouraging innovation and investing in research and development to keep America competitive in the 21st century. The Vice President will highlight initiatives that are spurring job creation and manufacturing, growing the economy, and helping America win the future. This event is open press. Media details are below. MEDIA DETAILS:

446

Microsoft Word - Assessment-C-SiteVisitProtocol  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ATTACHMENT C ATTACHMENT C DEPARTMENTAL EVALUATION AND SITE VISIT PROTOCOL 1. The Departmental Records Officer will provide in writing to the PRO a sixty day notice of intent to evaluate, along with recommended sites to be visited and areas to be examined. 2. The PRO will notify sites to be visited and coordinate mutually agreeable dates with the Departmental Records Officer. 3. The PRO will provide an overview of the organization's Records Management Program and make summaries of assessments available for review prior to the evaluation. 4. The PRO will highlight changes made to the program and future plans for improvement. 5. Field site visits may include the PRO and shall not exceed three days unless specified in writing. 6. Field sites will provide an overview of:

447

Energy Secretary Chu to visit Cincinnati and Massillon, Ohio | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Secretary Chu to visit Cincinnati and Massillon, Ohio Energy Secretary Chu to visit Cincinnati and Massillon, Ohio Energy Secretary Chu to visit Cincinnati and Massillon, Ohio October 14, 2010 - 12:00am Addthis WASHINGTON - U.S. Energy Secretary Steven Chu will travel to Ohio on Thursday and Friday to visit Cincinnati and Massillon. On Thursday, Secretary Chu will be joined by Congressman Steve Driehaus at the Cincinnati State Technical and Community College to learn about the school's workforce training efforts in renewable energy, energy audit, and sustainable building, and participate in a demonstration of a home energy audit. On Friday, Secretary Chu will travel to Massillon where he will tour Shearer's Food, the first LEED (Leadership in Energy and Environmental Design) Platinum Food Manufacturing Plant, with Congressman John Boccieri.

448

Secretary Chu, EM's Huizenga and Other DOE Officials Visit Catholic  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chu, EM's Huizenga and Other DOE Officials Visit Chu, EM's Huizenga and Other DOE Officials Visit Catholic University's Laboratory Secretary Chu, EM's Huizenga and Other DOE Officials Visit Catholic University's Laboratory January 17, 2013 - 12:00pm Addthis Dave Huizenga, head of EM, fifth from right, and Secretary of Energy Steven Chu, second from right, participate in a tour of Catholic University's Vitreous State Laboratory this week. Dave Huizenga, head of EM, fifth from right, and Secretary of Energy Steven Chu, second from right, participate in a tour of Catholic University's Vitreous State Laboratory this week. WASHINGTON, D.C. - Dave Huizenga, head of the Department of Energy (DOE) Office of Environmental Management (EM), was part of a DOE delegation led by Secretary of Energy Steven Chu that visited Catholic University's

449

Energy Secretary Moniz Visits Clean Coal Facility in Mississippi |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Moniz Visits Clean Coal Facility in Mississippi Secretary Moniz Visits Clean Coal Facility in Mississippi Energy Secretary Moniz Visits Clean Coal Facility in Mississippi November 8, 2013 - 3:36pm Addthis On Friday, Nov. 8, 2013, Secretary Moniz and international energy officials toured Kemper, the nation's largest carbon capture and storage facility, in Liberty, Mississippi. On Friday, Nov. 8, 2013, Secretary Moniz and international energy officials toured Kemper, the nation's largest carbon capture and storage facility, in Liberty, Mississippi. Allison Lantero Allison Lantero Public Affairs Specialist, Office of Public Affairs See a photo gallery of the Secretary's visit to Kemper. Liberty, Mississippi, a small town in the eastern county of Kemper, is quietly making energy history. Liberty is the home of the largest carbon capture and storage (CCS) plant

450

Microsoft Word - ScoutVisitPolicy2013.docx  

NLE Websites -- All DOE Office Websites (Extended Search)

Scout Troop Visitation and Tour Policy Scout Troop Visitation and Tour Policy Fourth Grade and Above Scout groups may visit the bison and the Interpretative Trail without advance notice. General Information We encourage visits on school holidays and Saturdays. If you have questions about the activities associated with the badges, please contact Sue Sheehan at 630-840-5058 or sheehan@fnal.gov. To register for a badge session, contact Maureen Hix at 630-840-5588 or mhix@fnal.gov. Boy Scouts Conducted by a Fermilab docent, Boy Scouts may complete the Nuclear Science badge in a two-hour session. To satisfy one of the requirements of the Citizenship in the Nation badge, Boy Scouts may tour the Fermilab facility. There is a charge of $60.00/up to 20 scouts for each session. Webelos

451

Site Visit Report, Lawrence Livermore National Laboratory - February 2011 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - Site Visit Report, Lawrence Livermore National Laboratory - February 2011 Site Visit Report, Lawrence Livermore National Laboratory - February 2011 February 2011 Lawrence Livermore National Laboratory Safety Basis Assessment This site visit report documents the collective results of the review of Lawrence Livermore National Laboratory (LLNL) safety basis processes and discusses its scope, objective, results and conclusions. Appendix A provides lists of the documents, interviews, and observations and Appendix B includes the plan for the review. This combined assessment was sponsored by the National Nuclear Safety Administration (NNSA) Livermore Site Office (LSO) and conducted jointly by staff from the Office of Health, Safety and Security (HSS) and LSO. The review was conducted in late 2010 and included

452

Site Visit Report, Los Alamos National Laboratory - June 2010 | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Los Alamos National Laboratory - June 2010 Site Visit Report, Los Alamos National Laboratory - June 2010 Site Visit Report, Los Alamos National Laboratory - June 2010 June 2010 Facility Centered Assessment of the Los Alamos National Laboratory Radioactive Liquid Waste Treatment Facility This site visit report documents the results of the Office of Health, Safety and Security's (HSS) review of the Facility Centered Assessment (FCA) of the Los Alamos National Laboratory (LANL) Radioactive Liquid Waste Treatment Facility (RLW). This review, conducted June 9-25, 2010, was sponsored by the U.S. Department of Energy (DOE) Los Alamos Site Office (LASO) and LANL, and conducted jointly by HSS, LASO, and LANL staff. The Office of Environment, Safety and Health Evaluations was the overall lead organization for evaluation of the FCA process with the participation of

453

EM Leaders Visit Employees at Moab Site | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Leaders Visit Employees at Moab Site Leaders Visit Employees at Moab Site EM Leaders Visit Employees at Moab Site March 14, 2013 - 12:00pm Addthis Moab Site employees Moab Site employees EM Principal Deputy Assistant Secretary Tracy Mustin and EM Consolidated Business Center Director Jack Craig visited the Moab Project sites in Utah on March 12. After touring the Moab site to see the uranium mill tailings removal operations and groundwater remediation well field, Mustin and Craig met with employees. "It was really great to meet with the employees and to see the important work they are carrying out safely and efficiently every day. The commitment of the federal and contractor team to getting the job done right is clear," Mustin said. In this photo, Mustin is tenth from right and Craig is ninth from right in the front row. The mill tailings are

454

Secretary Chu Visits ENN Headquarters and Tianjin University | Department  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Chu Visits ENN Headquarters and Tianjin University Secretary Chu Visits ENN Headquarters and Tianjin University Secretary Chu Visits ENN Headquarters and Tianjin University July 17, 2009 - 12:00am Addthis TIANJIN, CHINA - On the final day of his trip to China with Commerce Secretary Gary Locke, U.S. Energy Secretary Steven Chu visited ENN Headquarters in Langfang, Hebei Province, where a focus on clean energy generation has led to the creation of thousands of new jobs. Fact sheet on ENN below. On Friday Secretary Chu also delivered remarks at Tianjin University, where his grandfather was Dean and President, and discussed the importance of technological cooperation and codevelopment in addressing the global climate change challenge and furthering economic recovery in both the U.S. and China. Background on Secretary Chu's family connections to Tianjin

455

Secretary Chu to Visit Morgan State University | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chu to Visit Morgan State University Chu to Visit Morgan State University Secretary Chu to Visit Morgan State University March 9, 2011 - 12:00am Addthis Washington, DC - On Thursday, March 10 U.S. Energy Secretary Steven Chu will visit Morgan State University in Baltimore. Secretary Chu will tour the University's Center for Advanced Energy Systems and Environmental Control Technologies (CAESECT) and highlight Morgan State's commitment to helping the nation win the future through science, technology, engineering and mathematics (STEM) education. Morgan State University is part of a consortium that is leading the Department's Energy Innovation Hub focused on making buildings more energy efficient. Located at the Philadelphia Navy Yard Clean Energy campus, the Hub will bring together leading researchers from academia, two U.S.

456

Bruce Held visits Y-12 National Security Complex | National Nuclear  

National Nuclear Security Administration (NNSA)

Held visits Y-12 National Security Complex | National Nuclear Held visits Y-12 National Security Complex | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Bruce Held visits Y-12 National Security Complex Bruce Held visits Y-12 National Security Complex Posted By Office of Public Affairs Acting NNSA Administrator and Acting Undersecretary for Nuclear Security

457

Secretary Bodman Visits National Energy Technology Lab | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

National Energy Technology Lab National Energy Technology Lab Secretary Bodman Visits National Energy Technology Lab January 6, 2006 - 9:11am Addthis On Friday, January 6, Secretary Bodman visited the National Energy Technology Lab (NETL) in Pittsburgh, PA, to tour the research facility and hold an all-hands meeting with NETL employees. The Secretary was joined by Assistant Secretary for Fossil Energy Jeff Jarrett and Congressman Tim Murphy (R-PA). During the visit, Secretary Bodman toured exhibits on NETL's research and development projects and received demonstrations from scientists and researchers on the latest energy and environmental technologies developed by the lab. Prior to his visit to NETL, Secretary Bodman joined Reps. Melissa Hart and Tim Murphy for the Pittsburgh Energy Summit 2006. During the summit,

458

NREL: Wind Research - Global Wind Ambassador Visits the National...  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Wind Ambassador Visits the National Wind Technology Center December 2, 2013 Photo of Brian Smith, Dave Simms, and Stever Sawyer atop a turbine at the NWTC. The men are...

459

SLAC National Accelerator Laboratory - Actor Alan Alda Visits...  

NLE Websites -- All DOE Office Websites (Extended Search)

Actor Alan Alda Visits SLAC to Discuss Communicating Science to the Public By Lori Ann White October 30, 2012 Actor and writer Alan Alda is in a long-term, committed relationship...

460

Sandia National Laboratories: Visiting the Livermore Valley Open Campus  

NLE Websites -- All DOE Office Websites (Extended Search)

Visiting the LVOC Visiting the LVOC LVOC Home Partnership Opportunities Featured Programs Working at the LVOC Are you a member of the research, business, or academic community who would like to learn more about current and future opportunities at the Livermore Valley Open Campus? We're actively seeking companies, research organizations, universities, and other laboratories with interests in energy, computing, homeland security, and other laboratory mission areas. Request a visit Contact us to explore collaborative opportunities and to discuss a potential visit to the LVOC. We look forward to hearing from you! Map and directions Directions to the LVOC Screen reader users: click here for plain HTML Go to Google Maps Home 37.679620,-121.697112 Loading... Map Sat Ter Did you mean a different:

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Eastern Hemisphere Tropical Cyclones of 1996  

Science Conference Proceedings (OSTI)

This paper is an annual summary of the Eastern Hemisphere tropical cyclones of 1996. The tropical cyclone statistics presented derive from records at the Joint Typhoon Warning Center, Guam. Although the text focuses on the tropical cyclones that ...

Mark A. Lander; Eric J. Trehubenko; Charles P. Guard

1999-06-01T23:59:59.000Z

462

The Tropical Warm Pool International Cloud Experiment  

Science Conference Proceedings (OSTI)

A comprehensive dataset describing tropical cloud systems and their environmental setting and impacts has been collected during the Tropical Warm Pool International Cloud Experiment (TWP-ICE) and Aerosol and Chemical Transport in Tropical ...

Peter T. May; James H. Mather; Geraint Vaughan; Keith N. Bower; Christian Jakob; Greg M. McFarquhar; Gerald G. Mace

2008-05-01T23:59:59.000Z

463

Eastern Hemisphere Tropical Cyclones of 1995  

Science Conference Proceedings (OSTI)

This paper is designed to be an annual summary of the Eastern Hemisphere tropical cyclones of 1995. The tropical cyclone statistics presented are those of the Joint Typhoon Warning Center, Guam. The text focuses primarily upon the tropical ...

Mark A. Lander; Michael D. Angove

1998-02-01T23:59:59.000Z

464

Proceedings of the scientific visit on crystalline rock repository development.  

Science Conference Proceedings (OSTI)

A scientific visit on Crystalline Rock Repository Development was held in the Czech Republic on September 24-27, 2012. The visit was hosted by the Czech Radioactive Waste Repository Authority (RAWRA), co-hosted by Sandia National Laboratories (SNL), and supported by the International Atomic Energy Agency (IAEA). The purpose of the visit was to promote technical information exchange between participants from countries engaged in the investigation and exploration of crystalline rock for the eventual construction of nuclear waste repositories. The visit was designed especially for participants of countries that have recently commenced (or recommenced) national repository programmes in crystalline host rock formations. Discussion topics included repository programme development, site screening and selection, site characterization, disposal concepts in crystalline host rock, regulatory frameworks, and safety assessment methodology. Interest was surveyed in establishing a %E2%80%9Cclub,%E2%80%9D the mission of which would be to identify and address the various technical challenges that confront the disposal of radioactive waste in crystalline rock environments. The idea of a second scientific visit to be held one year later in another host country received popular support. The visit concluded with a trip to the countryside south of Prague where participants were treated to a tour of the laboratory and underground facilities of the Josef Regional Underground Research Centre.

Mariner, Paul E.; Hardin, Ernest L.; Miksova, Jitka [RAWRA, Czech Republic

2013-02-01T23:59:59.000Z

465

Atlantic Tropical Systems of 1993  

Science Conference Proceedings (OSTI)

A total of 70 tropical waves (also known as African or easterly waves) were counted in the Atlantic basin during the 1993 hurricane season. These waves led to the formation of 9 of the 10 total number of tropical cyclones in the Atlantic ...

Lixion A. Avila; Richard J. Pasch

1995-03-01T23:59:59.000Z

466

A Tropical Squall Line Observed during the COPT 81 Experiment in West Africa. Part 1: Kinematic Structure Inferred from Dual-Doppler Radar Data  

Science Conference Proceedings (OSTI)

This paper deals with the analysis of a tropical squall line, observed on 22 June 1981 during the COPT 81 (Convection Profonde Tropicale) experiment. The present Part I is restricted to the study of the kinematic structure of the system, which ...

Michel Chong; Paul Amayenc; Georges Scialom; Jacques Testud

1987-03-01T23:59:59.000Z

467

Tropical Cyclone Winds from Scatterometer Winds  

E-Print Network (OSTI)

this paper, wc demonstrate that accurate estimates of tropical cyclone intensity over data sparse ocean regions

Carol S. Hsu; W. Timothy Liu

1995-01-01T23:59:59.000Z

468

Orientation Visit to the Argonne National Laboratory, August 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

ANL-2011-08-24 ANL-2011-08-24 Site: Argonne National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Argonne National Laboratory Dates of Activity : 08/24/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Argonne Site Office (ASO) and the contractor-operated nuclear facilities at Argonne National Laboratory (ANL) at Argonne, Illinois on August 24, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness

469

Orientation Visit to the New Brunswick Laboratory, November 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

NBL-2011-11-21 NBL-2011-11-21 Site: New Brunswick Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the New Brunswick Laboratory Dates of Activity : 11/21/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE New Brunswick Laboratory (NBL) and the Office of Science Chicago Office (SC-CH) on the Argonne National Laboratory site, Argonne, IL, on November 21, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's

470

Southeastern visits local high school | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Southeastern visits local high school Southeastern visits local high school Southeastern visits local high school May 10, 2013 - 11:54am Addthis Southeastern employee, Dale Jett, uses a power system mockup to explain how power is distributed to homes. Southeastern employee, Dale Jett, uses a power system mockup to explain how power is distributed to homes. Southeastern employee, Sonya Hulme, describes the Power Marketing Administations and the ares that each one supports. Southeastern employee, Sonya Hulme, describes the Power Marketing Administations and the ares that each one supports. Southeastern's Assistant Administrator for Finance and Marketing, Virgil Hobbs, describes the 22 different hydroelectric projects in Southeastern's region. Southeastern's Assistant Administrator for Finance and Marketing, Virgil

471

HSS Visiting Speaker Program - September 18, 2008 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visiting Speaker Program - September 18, 2008 Visiting Speaker Program - September 18, 2008 HSS Visiting Speaker Program - September 18, 2008 Mr. Jeff Erickson will discuss the business and industrial models of sustainability and the impact of sustainability on organizations. SustainAbility is a strategic consulting firm and independent think tank established in 1987 with specialty services in sustainable development and corporate responsibility. With offices in Washington, London, and Zurich, SustainAbility utilizes the talents of its multidisciplinary personnel to work in teams to consult with clients in industry and non-governmental organizations. SustainAbility works with its clients to provide professional advice regarding the emerging market trends and the implications to their operations, with an emphasis on tangible progress.

472

Energy Secretary Steven Chu Visits Oak Ridge | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visits Oak Ridge Visits Oak Ridge Energy Secretary Steven Chu Visits Oak Ridge March 23, 2010 - 12:00am Addthis OAK RIDGE, TN - At an event earlier this afternoon at Oak Ridge National Laboratory, U.S. Energy Secretary Steven Chu announced that DOE has issued a five-year extension to its current management and operating contractor, UT-Battelle, LLC, for the continued operation of the Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee. While at Oak Ridge, Secretary Chu also met with staff from the laboratory and saw firsthand the progress that has been made possible as a result of the Recovery Act investments at the site. "ORNL's world-class facilities and scientific talent are vital to developing solutions to the Nation's many energy challenges," said

473

Visiting With Santa Fe Small Business Owners | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visiting With Santa Fe Small Business Owners Visiting With Santa Fe Small Business Owners Visiting With Santa Fe Small Business Owners May 10, 2012 - 9:02am Addthis Dot Harris Dot Harris The Honorable Dot Harris, Director, Office of Economic Impact and Diversity You've got to do your homework in order to contract with the federal government. Whether you are a large or small business owner, learning the ins and outs of government contracting takes dedication, perseverance, and taking advantage of opportunities to meet face-to-face with procurement experts and other businesses. That's where our Small Business Roundtables, Business Opportunity Sessions, conference booths, and Regional Small Business Summits come in. We want to meet directly with small business owners, managers, and staffers, to hear what you need to learn from us to make the contracting

474

Chicago-area SIAM student chapters visit Argonne | Argonne National  

NLE Websites -- All DOE Office Websites (Extended Search)

Chicago-area SIAM student chapters visit Argonne Chicago-area SIAM student chapters visit Argonne May 10, 2013 Tweet EmailPrint Forty undergraduate students, graduate students, and postdocs from Chicago-area SIAM chapters visited Argonne's Mathematics and Computer Science (MCS) Division on April 12 for a look into some of the exciting applied mathematics research being performed at the laboratory. The morning included ten "research vignettes" presented by MCS staff. Scalable power grid dynamics simulation (Shrirang Abhyankar) Data science for scientific computing: Learning and intelligent optimization (Prasanna Balaprakash) Parallel multigrid solvers (Jed Brown) Large-scale Gaussian process calculation without matrix factorizations (Jie Chen) Scaling computational fluid dynamics beyond a million cores (Paul

475

Orientation Visit to the Portsmouth Gaseous Diffusion Plant  

NLE Websites -- All DOE Office Websites (Extended Search)

PORTS-2011-08-03 PORTS-2011-08-03 Site: Portsmouth Gaseous Diffusion Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Portsmouth Gaseous Diffusion Plant Dates of Activity : 08/01/2011 - 08/03/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Portsmouth Site Office (PORTS) and the Portsmouth/Paducah Project Office (PPPO) in Lexington, Kentucky, from August 1-3, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's

476

Orientation Visit to the Waste Isolation Pilot Plant, September 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WIPP-2011-09-07 WIPP-2011-09-07 Site: Waste Isolation Pilot Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Waste Isolation Pilot Plant Dates of Activity : 09/07/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Carlsbad Field Office (CBFO) and the nuclear facility at the Waste Isolation Pilot Plant (WIPP) at Carlsbad, NM, on September 7, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's

477

Secretary Chu Visits Vogtle Nuclear Power Plant | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Vogtle Nuclear Power Plant Vogtle Nuclear Power Plant Secretary Chu Visits Vogtle Nuclear Power Plant February 15, 2012 - 3:54pm Addthis Secretary Chu traveled to Waynesboro, Georgia, to visit the Vogtle nuclear power plant, the site of what will be the first new nuclear reactors to be built in the United States in three decades. | Image credit: Southern Company. Secretary Chu traveled to Waynesboro, Georgia, to visit the Vogtle nuclear power plant, the site of what will be the first new nuclear reactors to be built in the United States in three decades. | Image credit: Southern Company. Niketa Kumar Niketa Kumar Public Affairs Specialist, Office of Public Affairs Just over 60 years ago, scientists in Arco, Idaho, successfully used nuclear energy to power four light bulbs, laying the foundation for U.S.

478

Energy Innovation Hub Directors Visit the Hill | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Energy Innovation Hub Directors Visit the Hill Energy Innovation Hub Directors Visit the Hill Energy Innovation Hub Directors Visit the Hill April 24, 2013 - 5:39pm Addthis Rep. Chaka Fattah (D-PA) and Acting Secretary of Energy Daniel Poneman speak during an event on Capitol Hill featuring the directors of the five energy innovation hubs. | Energy Department video. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What is an Energy Innovation Hub? Modeled after the strong scientific management characteristics of the Manhattan Project and AT&T Bell Laboratories, the Energy Innovation Hubs are integrated research centers that combine basic and applied research with engineering to accelerate scientific discovery that addresses critical energy issues. Yesterday, the directors of the Energy Department's Energy Innovation Hubs

479

Secretary Chu Visits Japanese Embassy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

12:00am 12:00am Addthis Washington, DC - Earlier this evening, Energy Secretary Steven Chu visited the Japanese Embassy in Washington, D.C., to sign a book of condolence for the victims of the recent tsunami and earthquakes that have impacted the country. The Secretary also met with Ambassador Ichiro Fujisaki to express his support for the people of Japan and to reaffirm the United States' continued commitment to assist the Japanese government in its ongoing response and recovery efforts. See below for the photographs from Secretary Chu's visit. For the latest on the Department of Energy's efforts in Japan visit energy.gov/japan2011. Secretary Chu signs a book of condolence Secretary Chu signs a book of condolence Secretary Chu sitting down with Ambassador Ichiro Fujisaki

480

Investor and entrepreneur visits Los Alamos for open coffee  

NLE Websites -- All DOE Office Websites (Extended Search)

Investor and entrepreneur visits for open coffee Investor and entrepreneur visits for open coffee Investor and entrepreneur visits Los Alamos for open coffee Brad Feld, a renowned early-stage investor and entrepreneur, will attend a meeting of the Open Coffee Club networking event. March 29, 2010 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

Note: This page contains sample records for the topic "tropical convection visiting" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Orientation Visit to the Paducah Gaseous Diffusion Plant  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PAD-2011-07-27 PAD-2011-07-27 Site: Paducah Gaseous Diffusion Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Paducah Gaseous Diffusion Plant Dates of Activity : 07/25/2011 - 07/27/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Paducah Site Office (PAD) from July 25-27, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's activities, and to determine how HSS can carry out its independent oversight and mission

482

Orientation Visit to the Paducah Gaseous Diffusion Plant  

NLE Websites -- All DOE Office Websites (Extended Search)

PAD-2011-07-27 PAD-2011-07-27 Site: Paducah Gaseous Diffusion Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Paducah Gaseous Diffusion Plant Dates of Activity : 07/25/2011 - 07/27/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Paducah Site Office (PAD) from July 25-27, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's activities, and to determine how HSS can carry out its independent oversight and mission

483

Site Visit Report, Lawrence Livermore National Laboratory - March 2010 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - March Site Visit Report, Lawrence Livermore National Laboratory - March 2010 Site Visit Report, Lawrence Livermore National Laboratory - March 2010 March 2010 Review of the Lawrence Livermore National Laboratory Identified Defective Department of Transportation Hazardous Material Packages This review of the Lawrence Livermore National Laboratory (LLNL) identification, immediate actions, communications, documentation, evaluation, reporting and follow-up to the discovery of defective Department of Transportation (DOT) UN1A2 55- and 30-gallon open head single bolt closure steel drums intended for storage and transportation of hazardous waste and materials, conducted on January 26-29, 2010, was sponsored by the DOE Livermore Site Office (LSO) to support interface with

484

Orientation Visit to the Argonne National Laboratory, August 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

ANL-2011-08-24 ANL-2011-08-24 Site: Argonne National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Argonne National Laboratory Dates of Activity : 08/24/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Argonne Site Office (ASO) and the contractor-operated nuclear facilities at Argonne National Laboratory (ANL) at Argonne, Illinois on August 24, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness

485

Secretary Moniz Visits Oak Ridge National Laboratory | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visits Oak Ridge National Laboratory Visits Oak Ridge National Laboratory Secretary Moniz Visits Oak Ridge National Laboratory June 5, 2013 - 3:18pm Addthis Energy Secretary Moniz at CASL 1 of 25 Energy Secretary Moniz at CASL Secretary Moniz tours the Consortium for Advanced Simulation of Light Water Reactors (CASL) facility at Oak Ridge National Laboratory (ORNL). CASL is one of the Energy Department's Energy Innovation Hubs. Date taken: 2013-06-03 12:04 Energy Secretary Moniz at CASL 2 of 25 Energy Secretary Moniz at CASL (From left, foreground) Deputy Secretary of Energy Daniel Poneman, Secretary of Energy Ernest Moniz and Rep. Chuck Fleischmann tour the CASL facility at ORNL. ORNL researcher Andrew Godfrey explains a reactor simulation in a CASL visualization lab. Date taken: 2013-06-03 12:04

486

Energy Innovation Hub Directors Visit the Hill | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Directors Visit the Hill Directors Visit the Hill Energy Innovation Hub Directors Visit the Hill April 24, 2013 - 5:39pm Addthis Rep. Chaka Fattah (D-PA) and Acting Secretary of Energy Daniel Poneman speak during an event on Capitol Hill featuring the directors of the five energy innovation hubs. | Energy Department video. Ben Dotson Ben Dotson Project Coordinator for Digital Reform, Office of Public Affairs What is an Energy Innovation Hub? Modeled after the strong scientific management characteristics of the Manhattan Project and AT&T Bell Laboratories, the Energy Innovation Hubs are integrated research centers that combine basic and applied research with engineering to accelerate scientific discovery that addresses critical energy issues. Yesterday, the directors of the Energy Department's Energy Innovation Hubs

487

Pacific Northwest Natioinal Laboratory Orientation Visit, January 2012  

NLE Websites -- All DOE Office Websites (Extended Search)

PNNL-2012-01-11 PNNL-2012-01-11 Site: Pacific Northwest National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Pacific Northwest National Laboratory Dates of Activity : 01/11/2012 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit for the HSS site lead at the Pacific Northwest National Laboratory (PNNL) and the Pacific Northwest Site Office (PNSO), Richland, WA, on January 11, 2012. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the

488

Site Visit Report, Lawrence Livermore National Laboratory - May 2010 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Site Visit Report, Lawrence Livermore National Laboratory - May Site Visit Report, Lawrence Livermore National Laboratory - May 2010 Site Visit Report, Lawrence Livermore National Laboratory - May 2010 May 2010 Review of Lawrence Livermore National Laboratory Fire Protection Design Review Process This review of the Lawrence Livermore National Laboratory (LLNL) Fire Protection Design Review Process, conducted on March 24 through April 2, 2010, was sponsored by the U.S. Department of Energy (DOE) Livermore Site Office (LSO) and conducted jointly with LSO staff. Overall, the design review process was observed to be effective and the LLNL programs for performing these reviews were being implemented. Many aspects of the process are effective, and the personnel who implement it are knowledgeable and experienced. This review identified only one

489

Orientation Visit to the Portsmouth Gaseous Diffusion Plant  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PORTS-2011-08-03 PORTS-2011-08-03 Site: Portsmouth Gaseous Diffusion Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Portsmouth Gaseous Diffusion Plant Dates of Activity : 08/01/2011 - 08/03/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Portsmouth Site Office (PORTS) and the Portsmouth/Paducah Project Office (PPPO) in Lexington, Kentucky, from August 1-3, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's

490

Secretary Chu Visits the 2012 North American International Auto Show |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chu Visits the 2012 North American International Auto Chu Visits the 2012 North American International Auto Show Secretary Chu Visits the 2012 North American International Auto Show January 12, 2012 - 9:54am Addthis 1 of 10 Energy Secretary Steven Chu with Chrysler Chief Executive Sergio Marchionne. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 2 of 10 Energy Secretary Steven Chu examines the Dodge Dart's four cylinder, 2.4-liter, 184 horsepower engine block. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 3 of 10 Energy Secretary Steven Chu gets behind the wheel of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 4 of 10 Energy Secretary Steven Chu examines the interior of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor)

491

Orientation Visit to the Waste Isolation Pilot Plant, September 2011  

NLE Websites -- All DOE Office Websites (Extended Search)

WIPP-2011-09-07 WIPP-2011-09-07 Site: Waste Isolation Pilot Plant Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Waste Isolation Pilot Plant Dates of Activity : 09/07/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE Carlsbad Field Office (CBFO) and the nuclear facility at the Waste Isolation Pilot Plant (WIPP) at Carlsbad, NM, on September 7, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the site's

492

Deputy Secretary Poneman to Visit Mongolia and Discuss Energy Issues |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Visit Mongolia and Discuss Energy Visit Mongolia and Discuss Energy Issues Deputy Secretary Poneman to Visit Mongolia and Discuss Energy Issues September 20, 2010 - 12:00am Addthis Washington, D.C. - Following his trip to Vienna, Austria to attend the International Atomic Energy Agency's 54th General Conference, U.S. Deputy Secretary of Energy Daniel Poneman will travel to Mongolia from Wednesday, September 22 to Friday, September 24, 2010. While in Mongolia, Deputy Secretary Poneman will meet with government officials and members of the private sector to discuss energy issues. He will also deliver remarks about the need to build a sustainable energy future at the Mongolian University of Science and Technology. Media contact(s): (202) 586-4940 Addthis Related Articles U.S. Energy Secretary Chu to Lead Delegation to IAEA 54th Annual General

493

Secretary Chu Visits the 2012 North American International Auto Show |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Chu Visits the 2012 North American International Auto Secretary Chu Visits the 2012 North American International Auto Show Secretary Chu Visits the 2012 North American International Auto Show January 12, 2012 - 9:54am Addthis 1 of 10 Energy Secretary Steven Chu with Chrysler Chief Executive Sergio Marchionne. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 2 of 10 Energy Secretary Steven Chu examines the Dodge Dart's four cylinder, 2.4-liter, 184 horsepower engine block. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 3 of 10 Energy Secretary Steven Chu gets behind the wheel of the new 2013 Dodge Dart. Image: Hantz Leger (Energy Department Contractor) Date taken: 2012-01-10 00:00 4 of 10 Energy Secretary Steven Chu examines the interior of the new 2013 Dodge

494

State and Tribal Government Working Group Visits the Fernald Preserve |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fernald Fernald Preserve State and Tribal Government Working Group Visits the Fernald Preserve July 12, 2013 - 11:28am Addthis On June 4 and 5, the U.S. Department of Energy (DOE) Office of Legacy Management (LM) hosted the State and Tribal Government Working Group (STGWG) at the Fernald Preserve in Ohio. This group-which receives support from the National Conference of State Legislatures-helps ensure that DOE facilities and sites are operated and cleaned up in compliance with all applicable federal and state laws and regulations and tribal rights. This was the STGWG's third visit to an LM site. In prior years the group visited Weldon Spring, Missouri, and Rocky Flats, Colorado. Members of the State and Tribal Government Working Group hike to the top of the On-Site Disposal Facility for full view of the Fernald Preserve.

495

Site Visit to the Sandia National Laboratories, April 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5-02 5-02 Site: Sandia National Laboratories Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Site Visit to the Sandia National Laboratories Dates of Activity : 04/29/2012 - 05/02/2012 Report Preparer: William Macon Activity Description/Purpose: The purpose of the Office of Health, Safety and Security (HSS) site visit activity at the Sandia National Laboratories (SNL) and the Sandia Site Office (SSO), Albuquerque, NM, was to conduct an orientation visit on April 29, 2012, for the HSS site lead, and to shadow a portion of a National Nuclear Security Administration (NNSA) review during May 1-2, 2012, at SNL of the weapon design agencies (DAs') processes for proper implementation of DOE-NA-STD-3016-2006, Hazard Analysis

496

Orientation Visit to the New Brunswick Laboratory, November 2011  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NBL-2011-11-21 NBL-2011-11-21 Site: New Brunswick Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the New Brunswick Laboratory Dates of Activity : 11/21/2011 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit to the DOE New Brunswick Laboratory (NBL) and the Office of Science Chicago Office (SC-CH) on the Argonne National Laboratory site, Argonne, IL, on November 21, 2011. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's

497

SLIDESHOW: Secretary Moniz Visits Oak Ridge National Laboratory |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Moniz Visits Oak Ridge National Laboratory Secretary Moniz Visits Oak Ridge National Laboratory SLIDESHOW: Secretary Moniz Visits Oak Ridge National Laboratory Addthis Energy Secretary Moniz at CASL 1 of 25 Energy Secretary Moniz at CASL Secretary Moniz tours the Consortium for Advanced Simulation of Light Water Reactors (CASL) facility at Oak Ridge National Laboratory (ORNL). CASL is one of the Energy Department's Energy Innovation Hubs. Date taken: 2013-06-03 12:04 Energy Secretary Moniz at CASL 2 of 25 Energy Secretary Moniz at CASL (From left, foreground) Deputy Secretary of Energy Daniel Poneman, Secretary of Energy Ernest Moniz and Rep. Chuck Fleischmann tour the CASL facility at ORNL. ORNL researcher Andrew Godfrey explains a reactor simulation in a CASL visualization lab. Date taken: 2013-06-03 12:04

498

Pacific Northwest Natioinal Laboratory Orientation Visit, January 2012  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PNNL-2012-01-11 PNNL-2012-01-11 Site: Pacific Northwest National Laboratory Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Orientation Visit to the Pacific Northwest National Laboratory Dates of Activity : 01/11/2012 Report Preparer: Joseph P. Drago Activity Description/Purpose: The U.S. Department of Energy (DOE) Office of Enforcement and Oversight, within the Office of Health, Safety and Security (HSS), conducted an orientation visit for the HSS site lead at the Pacific Northwest National Laboratory (PNNL) and the Pacific Northwest Site Office (PNSO), Richland, WA, on January 11, 2012. The purpose of the visit was to discuss the nuclear safety oversight strategy, describe the site lead program, increase HSS personnel's operational awareness of the

499

HSS Visiting Speaker Program - September 15, 2008 | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

September 15, 2008 September 15, 2008 HSS Visiting Speaker Program - September 15, 2008 Mr. Erik Peterson gave a presentation of the "Seven Revolutions" and their applicability to DOE and DOE's roles in helping to solve national issues. Founded in 1962, the Center for Strategic and International Studies (CSIS) provides strategic insights and policy solutions to decision makers in government, international institutions, the private sector, and civil society. A bipartisan, nonprofit organization headquartered in Washington, DC, CSIS conducts research and analysis and develops policy initiatives that look into the future and anticipate change. For more information, please visit the CSIS website. Documents Available for Download Companion Book Event Slideshow More Documents & Publications

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ARM - Evaluation Product - Convective Vertical Velocity  

NLE Websites -- All DOE Office Websites (Extended Search)

ProductsConvective Vertical Velocity ProductsConvective Vertical Velocity Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Convective Vertical Velocity 2011.04.25 - 2011.05.23 Site(s) SGP General Description Convective processes play an important role in Earth's energy balance by distributing heat and moisture throughout the atmosphere. In particular, vertical air motions associated with these processes are inherently linked to the life cycle of these convective systems and are therefore directly tied to their energy budget. However, direct measurements of vertical air motions (e.g., in situ aircraft observations) are sparse, making it difficult to compare them with numerical model output, which relies on convective parameterization schemes that have yet to be extensively