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Note: This page contains sample records for the topic "tropical cyclone activity" 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

Predicting Atlantic Basin Seasonal Tropical Cyclone Activity by 1 August  

Science Conference Proceedings (OSTI)

More than 90% of all seasonal Atlantic tropical cyclone activity typically occurs after 1 August. A strong predictive potential exists that allows seasonal forecasts of Atlantic basin tropical cyclone activity to be issued by 1 August, prior to ...

William M. Gray; Christopher W. Landsea; Paul W. Mielke Jr.; Kenneth J. Berry

1993-03-01T23:59:59.000Z

2

Impacts of Atmospheric Temperature Trends on Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

Impacts of tropical temperature changes in the upper troposphere (UT) and the tropical tropopause layer (TTL) on tropical cyclone (TC) activity are explored. UT and lower TTL cooling both lead to an overall increase in potential intensity (PI), ...

Gabriel A. Vecchi; Stephan Fueglistaler; Isaac M. Held; Thomas R. Knutson; Ming Zhao

2013-06-01T23:59:59.000Z

3

Multidecadal Variability in North Atlantic Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

Recent increases in Atlantic basin tropical cyclone activity since 1995 and the associated destructive U.S. landfall events in 2004 and 2005 have generated considerable interest into why there has been such a sharp upturn. Natural variability, ...

Philip J. Klotzbach; William M. Gray

2008-08-01T23:59:59.000Z

4

Experimental Dynamical Seasonal Forecasts of Tropical Cyclone Activity at IRI  

Science Conference Proceedings (OSTI)

The International Research Institute for Climate and Society (IRI) has been issuing experimental seasonal tropical cyclone activity forecasts for several ocean basins since early 2003. In this paper the method used to obtain these forecasts is ...

Suzana J. Camargo; Anthony G. Barnston

2009-04-01T23:59:59.000Z

5

Predicting Atlantic Basin Seasonal Tropical Cyclone Activity by 1 June  

Science Conference Proceedings (OSTI)

This is the third in a series of papers describing the potential for the seasonal forecasting of Atlantic basin tropical cyclone activity. Earlier papers by the authors describe seasonal prediction from 1 December of the previous year and from 1 ...

William M. Gray; Christopher W. Landsea; Paul W. Mielke Jr.; Kenneth J. Berry

1994-03-01T23:59:59.000Z

6

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

7

Modeling Seasonal Tropical Cyclone Activity in the Fiji Region as a Binary Classification Problem  

Science Conference Proceedings (OSTI)

This study presents a binary classification model for the prediction of tropical cyclone (TC) activity in the Fiji, Samoa, and Tonga regions (the FST region) using the accumulated cyclone energy (ACE) as a proxy of TC activity. A probit regression ...

Savin S. Chand; Kevin J. E. Walsh

2012-07-01T23:59:59.000Z

8

On Estimates of Historical North Atlantic Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

In this study, an estimate of the expected number of Atlantic tropical cyclones (TCs) that were missed by the observing system in the presatellite era (between 1878 and 1965) is developed. The significance of trends in both number and duration ...

Gabriel A. Vecchi; Thomas R. Knutson

2008-07-01T23:59:59.000Z

9

Revised Prediction of Seasonal Atlantic Basin Tropical Cyclone Activity from 1 August  

Science Conference Proceedings (OSTI)

Predictions of the remainder of the season’s Atlantic basin tropical cyclone activity from 1 August have been issued by Gray and his colleagues at the Tropical Meteorology Project at Colorado State University since 1984. The original 1 August ...

Philip J. Klotzbach

2007-10-01T23:59:59.000Z

10

Inactive Period of Western North Pacific Tropical Cyclone Activity in 1998–2011  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) activity over the western North Pacific (WNP) exhibits a significant interdecadal variation during 1960–2011, with two distinct active and inactive periods each. This study examines changes in TC activity and atmospheric ...

Kin Sik Liu; Johnny C. L. Chan

2013-04-01T23:59:59.000Z

11

A Simple Seasonal Forecast Update of Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

A simple method based on the cumulative number of tropical cyclones (TCs) up to a given month in the early season is proposed to update the seasonal prediction of the annual number of TCs in a given ocean basin. For the western North Pacific, if ...

Johnny C. L. Chan

2008-10-01T23:59:59.000Z

12

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

13

Revisiting the Influence of the Quasi-Biennial Oscillation on Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

The statistical relationship between the quasi-biennial oscillation (QBO) and tropical cyclone (TC) activity is explored, with a focus on the North Atlantic. Although there is a statistically significant relationship between the QBO and TCs in ...

Suzana J. Camargo; Adam H. Sobel

2010-11-01T23:59:59.000Z

14

Contributions of Barotropic Energy Conversion to Northwest Pacific Tropical Cyclone Activity during ENSO  

Science Conference Proceedings (OSTI)

The contribution of barotropic energy conversion to tropical cyclone (TC) activity over the western North Pacific (WNP) during warm and cold phases of El Niño–Southern Oscillation (ENSO) is investigated by separating TC vortices from reanalysis ...

Yao Ha; Zhong Zhong; Yimin Zhu; Yijia Hu

2013-04-01T23:59:59.000Z

15

Tropical Cyclone Activity Downscaled from NOAA-CIRES Reanalysis, 1908-1958  

E-Print Network (OSTI)

A recently developed technique for deducing tropical cyclone activity from global reanalyses and climate models is applied to a reanalysis of the global atmosphere during the period 1908-1958. This reanalysis assimilates ...

Emanuel, Kerry Andrew

16

A Bayesian Regression Approach for Predicting Seasonal Tropical Cyclone Activity over the Central North Pacific  

Science Conference Proceedings (OSTI)

In this study, a Poisson generalized linear regression model cast in the Bayesian framework is applied to forecast the tropical cyclone (TC) activity in the central North Pacific (CNP) in the peak hurricane season (July–September) using large-...

Pao-Shin Chu; Xin Zhao

2007-08-01T23:59:59.000Z

17

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

18

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

19

Comparison of explicitly simulated and downscaled tropical cyclone activity in a high-resolution global climate model  

E-Print Network (OSTI)

The response of tropical cyclone activity to climate change is a matter of great inherent interest and practical importance. Most current global climate models are not, however, capable of adequately resolving tropical ...

Emanuel, Kerry Andrew

20

Global and regional aspects of tropical cyclone activity in the CMIP5 models  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) activity is analyzed in 14 Coupled Model Intercomparison Project phase 5 (CMIP5) models. The global TC activity in the historical runs is compared with observations. The simulation of TC activity in the CMIP5 models is not as ...

Suzana J. Camargo

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Tropical cyclones and climate change review article  

E-Print Network (OSTI)

Whether the characteristics of tropical cyclones have changed or will change in a warming climate — and if so, how — has been the subject of considerable investigation, often with conflicting results. Large amplitude fluctuations in the frequency and intensity of tropical cyclones greatly complicate both the detection of long-term trends and their attribution to rising levels of atmospheric greenhouse gases. Trend detection is further impeded by substantial limitations in the availability and quality of global historical records of tropical cyclones. Therefore, it remains uncertain whether past changes in tropical cyclone activity have exceeded the variability expected from natural causes. However, future projections based on theory and high-resolution dynamical models consistently indicate that greenhouse warming will cause the globally averaged intensity of tropical cyclones to shift towards stronger storms, with intensity increases of 2–11 % by 2100. Existing modelling studies also consistently project decreases in the globally averaged frequency of tropical cyclones, by 6–34%. Balanced against this, higher resolution modelling studies typically project substantial increases in the frequency of the most intense cyclones, and increases of the order of 20% in the precipitation rate within 100 km of the storm centre. For all cyclone parameters, projected changes for individual basins show large variations between different modelling studies. The challenge for climate change detection and attribution research with regard to tropical cyclones is to determine whether an observed change in tropical cyclone activity

Thomas R. Knutson; John L. Mcbride; Johnny Chan; Kerry Emanuel; Greg Holl; Chris L; Isaac Held; James P. Kossin; A. K. Srivastava; Masato Sugi

2010-01-01T23:59:59.000Z

22

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

23

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

24

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

25

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

26

Systematic Variation of Summertime Tropical Cyclone Activity in the Western North Pacific in Relation to the Madden–Julian Oscillation  

Science Conference Proceedings (OSTI)

The variability of observed tropical cyclone (TC) activity (i.e., genesis, track, and landfall) in the western North Pacific (WNP) is examined in relation to the various categories of the Madden–Julian oscillation (MJO) during summer (June–...

Joo-Hong Kim; Chang-Hoi Ho; Hyeong-Seog Kim; Chung-Hsiung Sui; Seon Ki Park

2008-03-01T23:59:59.000Z

27

Interannual Variability of Northwest Australian Tropical Cyclones  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) activity over the southeast Indian Ocean has been studied far less than other TC basins, such as the North Atlantic and northwest Pacific. The authors examine the interannual TC variability of the northwest Australian (NWAUS)...

Kevin H. Goebbert; Lance M. Leslie

2010-09-01T23:59:59.000Z

28

Tropical Cyclone Lightning and Rapid Intensity Change  

Science Conference Proceedings (OSTI)

A large sample of Atlantic and eastern North Pacific tropical cyclone cases (2005–10) is used to investigate the relationships between lightning activity and intensity changes for storms over water. The lightning data are obtained from the ground-...

Mark DeMaria; Robert T. DeMaria; John A. Knaff; Debra Molenar

2012-06-01T23:59:59.000Z

29

Midlevel Ventilation's Constraint on Tropical Cyclone Intensity  

E-Print Network (OSTI)

Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a tropical cyclone’s intensity. An ...

Tang, Brian Hong-An

30

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

31

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

32

Modulation of Western North Pacific Tropical Cyclone Activity by the ISO. Part I: Genesis and Intensity  

Science Conference Proceedings (OSTI)

This study investigates the intraseasonal variability of tropical cyclones (TCs) by systematically examining the two major components of the intraseasonal oscillation (ISO), the 30–60-day Madden–Julian oscillation (MJO) and the 10–20-day quasi-...

Richard C. Y. Li; Wen Zhou

2013-05-01T23:59:59.000Z

33

Seasonal Prediction of Tropical Cyclone Activity Near Taiwan Using the Bayesian Multivariate Regression Method  

Science Conference Proceedings (OSTI)

A Poisson generalized linear regression model cast within a Bayesian framework is applied to forecast the seasonal tropical cyclone (TC) counts in the vicinity of Taiwan. The TC season considered is June–November and the data period used for ...

Mong-Ming Lu; Pao-Shin Chu; Yun-Ching Lin

2010-12-01T23:59:59.000Z

34

Reliability Analysis of Climate Change of Tropical Cyclone Activity over the Western North Pacific  

Science Conference Proceedings (OSTI)

Data homogeneity has become a significant issue in the study of tropical cyclones (TCs) and climate change. In this study, three historical datasets for the western North Pacific TCs from the Joint Typhoon Warning Center (JTWC), Japan ...

Fumin Ren; Jin Liang; Guoxiong Wu; Wenjie Dong; Xiuqun Yang

2011-11-01T23:59:59.000Z

35

Investigating Global Tropical Cyclone Activity with a Hierarchy of AGCMs: The Role of Model Resolution  

Science Conference Proceedings (OSTI)

The ability to run general circulation models (GCMs) at ever-higher horizontal resolutions has meant that tropical cyclone simulations are increasingly credible. A hierarchy of atmosphere-only GCMs, based on the Hadley Centre Global Environmental ...

Jane Strachan; Pier Luigi Vidale; Kevin Hodges; Malcolm Roberts; Marie-Estelle Demory

2013-01-01T23:59:59.000Z

36

Bayesian Change-Point Analysis of Tropical Cyclone Activity: The Central North Pacific Case  

Science Conference Proceedings (OSTI)

Bayesian analysis is applied to detect change points in the time series of annual tropical cyclone counts over the central North Pacific. Specifically, a hierarchical Bayesian approach involving three layers—data, parameter, and hypothesis—is ...

Pao-Shin Chu; Xin Zhao

2004-12-01T23:59:59.000Z

37

Historical Global Tropical Cyclone Landfalls  

Science Conference Proceedings (OSTI)

In recent decades, economic damage from tropical cyclones (TCs) around the world has increased dramatically. Scientific literature published to date finds that the increase in losses can be explained entirely by societal changes (such as ...

Jessica Weinkle; Ryan Maue; Roger Pielke Jr

2012-07-01T23:59:59.000Z

38

Tropical Cyclones and Climate Change  

E-Print Network (OSTI)

Whether the characteristics of tropical cyclones have changed or will change in a warming climate — and if so, how — has been the subject of considerable investigation, often with conflicting results. Large amplitude ...

Knutson, Thomas R.

39

Possible Linkage between the Monsoon Trough Variability and the Tropical Cyclone Activity over the Western North Pacific  

Science Conference Proceedings (OSTI)

The present study investigates the influence of the monsoon trough (MT) on the interannual variability of tropical cyclone (TC) activity over the western North Pacific during July–November for the period 1979–2007. It is shown that the TC activity ...

Liang Wu; Zhiping Wen; Ronghui Huang; Renguang Wu

2012-01-01T23:59:59.000Z

40

High-Resolution Modeling to Assess Tropical Cyclone Activity in Future Climate Regimes  

SciTech Connect

Applied research is proposed with the following objectives: (i) to determine the most likely level of tropical cyclone intensity and frequency in future climate regimes, (ii) to provide a quantitative measure of uncertainty in these predictions, and (iii) to improve understanding of the linkage between tropical cyclones and the planetary-scale circulation. Current mesoscale weather forecasting models, such as the Weather Research and Forecasting (WRF) model, are capable of simulating the full intensity of tropical cyclones (TC) with realistic structures. However, in order to accurately represent both the primary and secondary circulations in these systems, model simulations must be configured with sufficient resolution to explicitly represent convection (omitting the convective parameterization scheme). Most previous numerical studies of TC activity at seasonal and longer time scales have not utilized such explicit convection (EC) model runs. Here, we propose to employ the moving nest capability of WRF to optimally represent TC activity on a seasonal scale using a downscaling approach. The statistical results of a suite of these high-resolution TC simulations will yield a realistic representation of TC intensity on a seasonal basis, while at the same time allowing analysis of the feedback that TCs exert on the larger-scale climate system. Experiments will be driven with analyzed lateral boundary conditions for several recent Atlantic seasons, spanning a range of activity levels and TC track patterns. Results of the ensemble of WRF simulations will then be compared to analyzed TC data in order to determine the extent to which this modeling setup can reproduce recent levels of TC activity. Next, the boundary conditions (sea-surface temperature, tropopause height, and thermal/moisture profiles) from the recent seasons will be altered in a manner consistent with various future GCM/RCM scenarios, but that preserves the large-scale shear and incipient disturbance activity. This will allow (i) a direct comparison of future TC activity that could be expected for an active or inactive season in an altered climate regime, and (ii) a measure of the level of uncertainty and variability in TC activity resulting from different carbon emission scenarios.

Lackmann, Gary

2013-06-10T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

A Ventilation Index for Tropical Cyclones  

E-Print Network (OSTI)

An important environmental control of both tropical cyclone intensity and genesis is vertical wind shear. One hypothesized pathway by which vertical shear affects tropical cyclones is midlevel ventilation—or the flux of ...

Tang, Brian

42

Diagnosing Forecast Errors in Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

This paper reports on the development of a diagnostic approach that can be used to examine the sources of numerical model forecast error that contribute to degraded tropical cyclone (TC) motion forecasts. Tropical cyclone motion forecasts depend ...

Thomas J. Galarneau Jr.; Christopher A. Davis

2013-02-01T23:59:59.000Z

43

Modulation of Western North Pacific Tropical Cyclone Activity by the ISO. Part II: Tracks and Landfalls  

Science Conference Proceedings (OSTI)

This study investigates how tropical cyclone (TC) tracks and landfalls are modulated by the two major components of the intraseasonal oscillation (ISO), the 30–60-day Madden–Julian oscillation (MJO) and the 10–20-day quasi-biweekly oscillation (...

Richard C. Y. Li; Wen Zhou

2013-05-01T23:59:59.000Z

44

Future Changes in Tropical Cyclone Activity Projected by the New High-Resolution MRI-AGCM  

Science Conference Proceedings (OSTI)

New versions of the high-resolution 20- and 60-km-mesh Meteorological Research Institute (MRI) atmospheric general circulation models (MRI-AGCM version 3.2) have been developed and used to investigate potential future changes in tropical cyclone (...

Hiroyuki Murakami; Yuqing Wang; Hiromasa Yoshimura; Ryo Mizuta; Masato Sugi; Eiki Shindo; Yukimasa Adachi; Seiji Yukimoto; Masahiro Hosaka; Shoji Kusunoki; Tomoaki Ose; Akio Kitoh

2012-05-01T23:59:59.000Z

45

Ocean Barrier Layers’ Effect on Tropical Cyclone Intensification  

SciTech Connect

Improving a tropical cyclone's forecast and mitigating its destructive potential requires knowledge of various environmental factors that influence the cyclone's path and intensity. Herein, using a combination of observations and model simulations, we systematically demonstrate that tropical cyclone intensification is significantly affected by salinity-induced barrier layers, which are 'quasi-permanent' features in the upper tropical oceans. When tropical cyclones pass over regions with barrier layers, the increased stratification and stability within the layer reduce storm-induced vertical mixing and sea surface temperature cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, an intensification of tropical cyclones. On average, the tropical cyclone intensification rate is nearly 50% higher over regions with barrier layers, compared to regions without. Our finding, which underscores the importance of observing not only the upper-ocean thermal structure but also the salinity structure in deep tropical barrier layer regions, may be a key to more skillful predictions of tropical cyclone intensities through improved ocean state estimates and simulations of barrier layer processes. As the hydrological cycle responds to global warming, any associated changes in the barrier layer distribution must be considered in projecting future tropical cyclone activity.

Balaguru, Karthik; Chang, P.; Saravanan, R.; Leung, Lai-Yung R.; Xu, Zhao; Li, M.; Hsieh, J.

2012-09-04T23:59:59.000Z

46

Statistical modelling of tropical cyclone tracks: modelling cyclone lysis  

E-Print Network (OSTI)

We describe results from the fifth stage of a project to build a statistical model of tropical cyclone tracks. The previous stages considered genesis and the shape of tracks. We now consider in more detail how to represent the lysis (death) of tropical cyclones. Improving the lysis model turns out to bring a significant improvement to the track model overall.

Hall, T; Hall, Tim; Jewson, Stephen

2005-01-01T23:59:59.000Z

47

Tropical Cyclone Movement and Surrounding Flow Relationships  

Science Conference Proceedings (OSTI)

This paper presents results of a comprehensive study of the relationship between the movement of tropical cyclones and the large-scale circulation which surrounds them. Cyclones have been stratified by direction and speed of movement, latitude, ...

Johnny C. L. Chan; William M. Gray

1982-10-01T23:59:59.000Z

48

Raindrop Size Distribution Measurements in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Characteristics of the raindrop size distribution in seven tropical cyclones have been studied through impact-type disdrometer measurements at three different sites during the 2004–06 Atlantic hurricane seasons. One of the cyclones has been ...

Ali Tokay; Paul G. Bashor; Emad Habib; Takis Kasparis

2008-05-01T23:59:59.000Z

49

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

50

A Look at Global Tropical Cyclone Activity during 1995: Contrasting High Atlantic Activity with Low Activity in Other Basins  

Science Conference Proceedings (OSTI)

During 1995, there was a near-record number of named tropical cyclones in the North Atlantic basin. This unusual event fueled speculation that it marked a tangible signal of global climate change, or that it marked a return to a period of higher ...

Mark A. Lander; Charles P. Guard

1998-05-01T23:59:59.000Z

51

The Automated Tropical Cyclone Forecasting System (ATCF)  

Science Conference Proceedings (OSTI)

The U.S. Navy Automated Tropical Cyclone Forecasting System (ATCF) is an IBM-AT compatible software package developed for the Joint Typhoon Warning Center (JTWC), Guam. ATCF is designed to assist forecasters with the process of making tropical ...

Ronald J. Miller; Ann J. Schrader; Charles R. Sampson; Ted L. Tsui

1990-12-01T23:59:59.000Z

52

A Ventilation Index for Tropical Cyclones  

Science Conference Proceedings (OSTI)

An important environmental control of both tropical cyclone intensity and genesis is vertical wind shear. One hypothesized pathway by which vertical shear affects tropical cyclones is midlevel ventilation—or the flux of low-entropy air into the center of ...

Brian Tang; Kerry Emanuel

2012-12-01T23:59:59.000Z

53

Lightning Distribution and Eyewall Outbreaks in Tropical Cyclones during Landfall  

Science Conference Proceedings (OSTI)

Cloud-to-ground lightning data and storm intensity data (winds and central pressure) for 33 northwest Pacific tropical cyclones were used to analyze lightning distributions during the period of landfall in China. Lightning activities varied ...

Wenjuan Zhang; Yijun Zhang; Dong Zheng; Xiuji Zhou

2012-11-01T23:59:59.000Z

54

The Track Integrated Kinetic Energy of Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

In this paper the concept of track integrated kinetic energy (TIKE) is introduced as a measure of seasonal Atlantic tropical cyclone activity and applied to seasonal variability in the Atlantic. It is similar in concept to the more commonly used ...

V. Misra; S. DiNapoli; M. Powell

2013-07-01T23:59:59.000Z

55

Tropical Cyclones as a Critical Phenomenon  

E-Print Network (OSTI)

It has been proposed that the number of tropical cyclones as a function of the energy they release is a decreasing power-law function, up to a characteristic energy cutoff determined by the spatial size of the ocean basin in which the storm occurs. This means that no characteristic scale exists for the energy of tropical cyclones, except for the finite-size effects induced by the boundaries of the basins. This has important implications for the physics of tropical cyclones. We discuss up to what point tropical cyclones are related to critical phenomena (in the same way as earthquakes, rainfall, etc.), providing a consistent picture of the energy balance in the system. Moreover, this perspective allows one to visualize more clearly the effects of global warming on tropical-cyclone occurrence.

Corral, A

2011-01-01T23:59:59.000Z

56

Scaling of Tropical-Cyclone Dissipation  

E-Print Network (OSTI)

The influence of climate variability and global warming on the occurrence of tropical cyclones (TC) is a controversial issue. Existing historical databases on the subject are not fully reliable, but a more fundamental hindrance is the lack of basic understanding regarding the intrinsic nature of tropical cyclone genesis and evolution. It is known that tropical cyclones involve more than a passive response to changing external forcing, but it is not clear which dynamic behaviour best describes them. Here we present a new approach based on the application of the power dissipation index (PDI), which constitutes an estimation of released energy, to individual tropical cyclones. A robust law emerges for the statistics of PDI, valid in four different ocean basins and over long time periods. In addition to suggesting a novel description of the physics of tropical cyclones in terms of critical phenomena, the law allows to quantify their response to changing climatic conditions, with an increase in the largest PDI val...

Osso, Albert; Llebot, J E

2009-01-01T23:59:59.000Z

57

Changes in Tropical Cyclone Activity due to Global Warming: Results from a High-Resolution Coupled General Circulation Model  

Science Conference Proceedings (OSTI)

This study investigates the possible changes that greenhouse global warming might generate in the characteristics of tropical cyclones (TCs). The analysis has been performed using scenario climate simulations carried out with a fully coupled high-...

S. Gualdi; E. Scoccimarro; A. Navarra

2008-10-01T23:59:59.000Z

58

Simulations of the Extratropical Transition of Tropical Cyclones: Phasing between the Upper-Level Trough and Tropical Cyclones  

Science Conference Proceedings (OSTI)

Whether the tropical cyclone remnants will become a significant extratropical cyclone during the reintensification stage of extratropical transition is a complex problem because of the uncertainty in the tropical cyclone, the midlatitude ...

Elizabeth A. Ritchie; Russell L. Elsberry

2007-03-01T23:59:59.000Z

59

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

60

Factors that can influence the onset time of rapid intensification of tropical cyclones  

E-Print Network (OSTI)

The maximum intensity of tropical cyclones in axisymmetricsea interaction theory for tropical cyclones. part i: Steady1995), Sensitivity of tropical cyclones to surface exchange

Bu, Yizhe

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

The Interannual Variability of Tropical Cyclones  

Science Conference Proceedings (OSTI)

This paper examines the interannual variability of tropical cyclones in each of the earth’s cyclone basins using data from 1985 to 2003. The data are first analyzed using a Monte Carlo technique to investigate the long-standing myth that the ...

William M. Frank; George S. Young

2007-10-01T23:59:59.000Z

62

Inner Core Strength of Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

The evolution of the wind field beyond the radius of maximum winds is studied for 18 Atlantic tropical cyclones (TCs) with 989 research and reconnaissance flight legs. Inner core strength, defined as the storm relative mean tangential wind from ...

Mark Croxford; Gary M. Barnes

2002-01-01T23:59:59.000Z

63

An Observational Analysis of Tropical Cyclone Recurvature  

Science Conference Proceedings (OSTI)

Data for 21 years (1957–77) of North Pacific rawinsondes were examined to investigate the interaction between the synoptic-scale circulation and tropical cyclones prior to, and during, the recurvature process. This study is believed to be the ...

Stephen Hodanish; William M. Gray

1993-10-01T23:59:59.000Z

64

Experiments with a Spectral Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

The three-layer balanced axisymmetric tropical cyclone model presented by Ooyama is generalized to dimensions and the resultant primitive equations are solved using the spectral (Galerkin) method with Fourier basis functions on a doubly-periodic ...

Mark DeMaria; Wayne H. Schubert

1984-03-01T23:59:59.000Z

65

The Maximum Potential Intensity of Tropical Cyclones  

Science Conference Proceedings (OSTI)

A thermodynamic approach to estimating maximum potential intensity (MPI) of tropical cyclones is described and compared with observations and previous studies. The approach requires an atmospheric temperature sounding, SST, and surface pressure; ...

Greg J. Holland

1997-11-01T23:59:59.000Z

66

A Statistical Analysis of Tropical Cyclone Intensity  

Science Conference Proceedings (OSTI)

Cumulative distribution functions (CDFs) of tropical cyclone wind speeds are calculated using best track data from the North Atlantic and western North Pacific basins. Wind speeds are normalized by theoretical potential wind speeds derived from ...

Kerry Emanuel

2000-04-01T23:59:59.000Z

67

Momentum Transports Associated with Tropical Cyclone Recurvature  

Science Conference Proceedings (OSTI)

This study attempts to investigate the linear momentum budget responsible for tropical cyclone (TC) recurvature. Using the operational analyses from the U.K. Meteorological Office global model, the environmental flow associated with recurving TCs ...

Y. S. Li; Johnny C. L. Chan

1999-06-01T23:59:59.000Z

68

Geostationary Doppler Radar and Tropical Cyclone Surveillance  

Science Conference Proceedings (OSTI)

The potential usefulness of spaceborne Doppler radar as a tropical cyclone observing tool is assessed by conducting a high-resolution simulation of an intense hurricane and generating synthetic observations of reflectivity and radial velocity. The ...

William E. Lewis; Eastwood Im; Simone Tanelli; Ziad Haddad; Gregory J. Tripoli; Eric A. Smith

2011-10-01T23:59:59.000Z

69

Satellite Microwave Surface Observations in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Sea surface estimates of local winds, waves, and rain-rate conditions are crucial to complement infrared/visible satellite images in estimating the strength of tropical cyclones (TCs). Satellite measurements at microwave frequencies are thus key ...

Yves Quilfen; Bertrand Chapron; Jean Tournadre

2010-02-01T23:59:59.000Z

70

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

71

Thermodynamic Aspects of Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

The thermodynamic aspects of tropical cyclone (TC) formation near the center of the wave pouch, a region of approximately closed Lagrangian circulation within the wave critical layer, are examined through diagnoses of a high-resolution numerical ...

Zhuo Wang

2012-08-01T23:59:59.000Z

72

Environmental Control of Tropical Cyclone Intensity  

Science Conference Proceedings (OSTI)

The influence of various environmental factors on tropical cyclone intensity is explored using a simple coupled ocean–atmosphere model. It is first demonstrated that this model is capable of accurately replicating the intensity evolution of ...

Kerry Emanuel; Christopher DesAutels; Christopher Holloway; Robert Korty

2004-04-01T23:59:59.000Z

73

Environmental Factors Affecting Tropical Cyclone Power Dissipation  

Science Conference Proceedings (OSTI)

Revised estimates of kinetic energy production by tropical cyclones in the Atlantic and western North Pacific are presented. These show considerable variability on interannual-to-multidecadal time scales. In the Atlantic, variability on time ...

Kerry Emanuel

2007-11-01T23:59:59.000Z

74

Midlevel ventilation's constraint on tropical cyclone intensity  

E-Print Network (OSTI)

Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a TC's intensity. An idealized ...

Tang, Brian Hong-An

2010-01-01T23:59:59.000Z

75

Parameter spaces of environmental fields responsible for cyclone development from tropics to extratropics  

Science Conference Proceedings (OSTI)

Objective cyclone tracking applied to a 30-year reanalysis dataset shows that cyclone development in the summer and autumn seasons is active in the tropics and extratropics and inactive in the subtropics. To understand this geographically bimodal ...

Wataru Yanase; Hiroshi Niino; Kevin Hodges; Naoko Kitabatake

76

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

77

An Algorithm for Tracking Eyes of Tropical Cyclones  

Science Conference Proceedings (OSTI)

A tropical cyclone (TC) eye tracking (TCET) algorithm is presented in this study to objectively identify and track the eye and center of a tropical cyclone using radar reflectivity data. Twelve typhoon cases were studied for evaluating the TCET ...

Pao-Liang Chang; Ben Jong-Dao Jou; Jian Zhang

2009-02-01T23:59:59.000Z

78

Comments on “Reexamination of Tropical Cyclone Wind–Pressure Relationship”  

Science Conference Proceedings (OSTI)

In their study on the wind–pressure relationship (WPR) that exists in tropical cyclones, Knaff and Zehr presented results of the use of the Dvorak Atlantic WPR for estimating central pressure and maximum wind speed of tropical cyclones. These ...

Shyamnath Veerasamy

2008-08-01T23:59:59.000Z

79

A Technique for Combining Global Tropical Cyclone Best Track Data  

Science Conference Proceedings (OSTI)

Best track data generally consist of the positions and intensities during the life cycle of a tropical cyclone. Despite the widespread interest in the distribution, frequency, and intensity of tropical cyclones worldwide, no publicly available ...

Michael C. Kruk; Kenneth R. Knapp; David H. Levinson

2010-04-01T23:59:59.000Z

80

On the size distribution of Atlantic tropical cyclones  

E-Print Network (OSTI)

The size of a tropical cyclone is known to vary considerably across storms, though little is understood about the environmental and internal factors that modulate it. Making use of newly available extended tropical cyclone ...

Emanuel, Kerry Andrew

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Aerosol Effects on Microstructure and Intensity of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Improving the forecasts of the intensity of tropical cyclones (TCs) remains a major challenge. One possibility for improvement is consideration of the effects that aerosols have on tropical clouds and cyclones. The authors have been pursuing this under ...

Daniel Rosenfeld; William L. Woodley; Alexander Khain; William R. Cotton; Gustavo Carrió; Isaac Ginis; Joseph H. Golden

2012-07-01T23:59:59.000Z

82

Sensitivity of Tropical Cyclone Rainbands to Ice-Phase Microphysics  

Science Conference Proceedings (OSTI)

A high-resolution tropical cyclone model with explicit cloud microphysics has been used to investigate the dynamics and energetics of tropical cyclone rainbands. As a first step, the model rainbands have been qualitatively compared with observed ...

Charmaine N. Franklin; Greg J. Holland; Peter T. May

2005-08-01T23:59:59.000Z

83

Choosing a Boundary Layer Parameterization for Tropical Cyclone Modeling  

Science Conference Proceedings (OSTI)

The boundary layer in a tropical cyclone is in some respects unlike that elsewhere in the atmosphere. It is therefore necessary to evaluate boundary layer parameterizations for their suitability for use in tropical cyclone simulation. Previous ...

Jeffrey D. Kepert

2012-05-01T23:59:59.000Z

84

Radar Signatures of Tropical Cyclone Tornadoes in Central North Carolina  

Science Conference Proceedings (OSTI)

During the tropical cyclone season of 2004, there were four tropical cyclones that spawned tornadoes in central North Carolina: Frances, Gaston, Ivan, and Jeanne. This study examines the environmental characteristics and radar signatures from ...

Douglas Schneider; Scott Sharp

2007-04-01T23:59:59.000Z

85

Observational Analysis of Tropical Cyclone Formation Associated with Monsoon Gyres  

Science Conference Proceedings (OSTI)

Large-scale monsoon gyres and the involved tropical cyclone formation over the western North Pacific have been documented in previous studies. The aim of this study is to understand how monsoon gyres affect tropical cyclone formation. An ...

Liguang Wu; Huijun Zong; Jia Liang

2013-04-01T23:59:59.000Z

86

An Alternative Tropical Cyclone Intensity Forecast Verification Technique  

Science Conference Proceedings (OSTI)

The National Hurricane Center (NHC) does not verify official or model forecasts if those forecasts call for a tropical cyclone to dissipate or if the real tropical cyclone dissipates. A new technique in which these forecasts are included in a ...

Sim D. Aberson

2008-12-01T23:59:59.000Z

87

Improvements to the Operational Tropical Cyclone Wind Speed Probability Model  

Science Conference Proceedings (OSTI)

The National Hurricane Center Hurricane Probability Program, which estimated the probability of a tropical cyclone passing within a specific distance of a selected set of coastal stations, was replaced by the more general Tropical Cyclone Surface ...

Mark DeMaria; John A. Knaff; Michael J. Brennan; Daniel Brown; Richard D. Knabb; Robert T. DeMaria; Andrea Schumacher; Christopher A. Lauer; David P. Roberts; Charles R. Sampson; Pablo Santos; David Sharp; Katherine A. Winters

2013-06-01T23:59:59.000Z

88

Tropical Cyclone Intensity and Sea Surface Temperature  

Science Conference Proceedings (OSTI)

It is hypothesized that the effect of the SST on the intensity of tropical cyclones can be separated into two distinct contributions: one from the large-scale SST field that is in equilibrium with the atmosphere, and another one from a local ...

Lars R. Schade

2000-09-01T23:59:59.000Z

89

Tropical Cyclone Contribution to Rainfall over Australia  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) rainfall over the Australian continent is studied using observations from 41 TC seasons 1969/70 to 2009/10. A total of 318 storms, whose centers either crossed the coastline or were located within 500?km of the coast, are ...

Richard A. Dare; Noel E. Davidson; John L. McBride

2012-11-01T23:59:59.000Z

90

Tropical Cyclone Tornadoes, 1950–2007  

Science Conference Proceedings (OSTI)

An expanded “climatology” of U.S. tropical cyclone (TC) tornadoes covering the period 1950–2007 is presented. A major climatology published in 1991 included data on 626 TC tornadoes. Since then, almost 1200 more TC tornado records have been ...

Lori A. Schultz; Daniel J. Cecil

2009-10-01T23:59:59.000Z

91

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

92

Finding Tropical Cyclones on a Cloud Computing Cluster: Using Parallel Virtualization for Large-Scale Climate Simulation Analysis  

E-Print Network (OSTI)

Chang. Changes in Tropical Cyclone Number, Duration, andSimulation of Future Tropical Cyclone Statistics in a High-Finding Tropical Cyclones on a Cloud Computing Cluster:

Hasenkamp, Daren

2011-01-01T23:59:59.000Z

93

Midlevel Ventilation’s Constraint on Tropical Cyclone Intensity  

Science Conference Proceedings (OSTI)

Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a tropical cyclone’s intensity. An idealized framework based ...

Brian Tang; Kerry Emanuel

2010-06-01T23:59:59.000Z

94

Influence of Tropical Tropopause Layer Cooling on Atlantic Hurricane Activity  

Science Conference Proceedings (OSTI)

Virtually all metrics of Atlantic tropical cyclone activity show substantial increases over the past two decades. It is argued here that cooling near the tropical tropopause and the associated decrease in tropical cyclone outflow temperature ...

Kerry Emanuel; Susan Solomon; Doris Folini; Sean Davis; Chiara Cagnazzo

2013-04-01T23:59:59.000Z

95

Influence of Tropical Tropopause Layer Cooling on Atlantic Hurricane Activity  

E-Print Network (OSTI)

Virtually all metrics of Atlantic tropical cyclone activity show substantial increases over the past two decades. It is argued here that cooling near the tropical tropopause and the associated decrease in tropical cyclone ...

Solomon, Susan

96

Observational Undersampling in Tropical Cyclones and Implications for Estimated Intensity  

Science Conference Proceedings (OSTI)

The maximum surface wind speed is an important parameter for tropical cyclone operational analysis and forecasting, since it defines the intensity of a cyclone. Operational forecast centers typically refer the wind speed to a maximum 1- or 10-min ...

Eric W. Uhlhorn; David S. Nolan

2012-03-01T23:59:59.000Z

97

Monsoonal Interactions Leading to Sudden Tropical Cyclone Track Changes  

Science Conference Proceedings (OSTI)

Sudden poleward track changes of tropical cyclones embedded in monsoon gyres in the western North Pacific are documented. During these track changes, which are generally not well forecast, the cyclones are often accompanied by a separate comma-...

Lester E. Carr III; Russell L. Elsberry

1995-02-01T23:59:59.000Z

98

Western North Pacific Tropical Cyclone Intensity and ENSO  

Science Conference Proceedings (OSTI)

The influence of the El Niño–Southern Oscillation (ENSO) on tropical cyclone intensity in the western North Pacific basin is examined. Accumulated cyclone energy (ACE), constructed from the best-track dataset for the region for the period 1950–...

Suzana J. Camargo; Adam H. Sobel

2005-08-01T23:59:59.000Z

99

A Comparison of Adaptive Observing Guidance for Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Airborne adaptive observations have been collected for more than two decades in the neighborhood of tropical cyclones, to attempt to improve short-range forecasts of cyclone track. However, only simple subjective strategies for adaptive ...

S. J. Majumdar; S. D. Aberson; C. H. Bishop; R. Buizza; M. S. Peng; C. A. Reynolds

2006-09-01T23:59:59.000Z

100

Modulation of North Pacific Tropical Cyclone Activity by Three Phases of ENSO  

Science Conference Proceedings (OSTI)

Tropical Pacific Ocean warming has been separated into two modes based on the spatial distribution of the maximum sea surface temperature (SST) anomaly: an east Pacific warming (EPW) and a central Pacific warming (CPW). When combined with east ...

Hye-Mi Kim; Peter J. Webster; Judith A. Curry

2011-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Extratropical Transition of Southwest Pacific Tropical Cyclones. Part I: Climatology and Mean Structure Changes  

Science Conference Proceedings (OSTI)

A database of tropical cyclone best track and intensity information for the southwest Pacific Ocean basin is used to construct a 28-year climatology for tropical cyclones that move into middle latitudes. Of the nine or so tropical cyclones that ...

Mark R. Sinclair

2002-03-01T23:59:59.000Z

102

The effects of ocean eddies on tropical cyclones.  

E-Print Network (OSTI)

??The purpose of this study is to understand the interactions of tropical cyclones with ocean eddies. In particular we examine the influence of a cold-core… (more)

Miltenberger, Alexander Reid

2012-01-01T23:59:59.000Z

103

JPL Tropical Cyclone Information System Analysis Tool | Data...  

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

JPL Tropical Cyclone Information System Analysis Tool Dataset Summary Description This tool will let you analyze data associated with a storm. You can plot histograms, maps, and...

104

RSS Feeds for Specific Tropical Cyclones of the North Atlantic...  

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

RSS Feeds for Specific Tropical Cyclones of the North Atlantic, Caribbean Sea, and Gulf of Mexico (English) Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS...

105

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

106

A Pressure-Based Analysis of the Historical Western North Pacific Tropical Cyclone Intensity Record  

Science Conference Proceedings (OSTI)

The western North Pacific Ocean is the most active tropical cyclone (TC) basin. However, recent studies are not conclusive on whether the TC activity is increasing or decreasing, at least when calculations are based on maximum sustained winds. For ...

Kenneth R. Knapp; John A. Knaff; Charles R. Sampson; Gustavo M. Riggio; Adam D. Schnapp

2013-08-01T23:59:59.000Z

107

A pressure-based analysis of the historical western North Pacific tropical cyclone intensity record  

Science Conference Proceedings (OSTI)

The western North Pacific Ocean is the most active tropical cyclone (TC) basin. However, recent studies are not conclusive on whether the TC activity is increasing or decreasing, at least when calculations are based on maximum sustained winds. For ...

Kenneth R. Knapp; John A. Knaff; Charles R. Sampson; Gustavo M. Riggio; Adam D. Schnapp

108

The South Pacific and southeast Indian Ocean tropical cyclone season 2000-01  

E-Print Network (OSTI)

Twelve tropical cyclones formed in the South Pacific and southeast Indian Ocean during the 2000-01 tropical cyclone season. Of these, four formed in the South Pacific east of 160°E. Cyclone numbers in the Australian region were slightly below average, while numbers in the South Pacific were significantly less than average. The season was characterised by moderate La Niña conditions, weakening towards the end of the season. Cyclone occurrences were linked to active phases of the 30 to 60-day intraseasonal oscillation.

P. W. Bate

2002-01-01T23:59:59.000Z

109

Tropical cyclone preparedness and response : opportunities for operations research  

E-Print Network (OSTI)

This thesis explores how operations research methods can be applied in the emergency response community by looking at two recent tropical storm disasters; tropical cyclone Yemyin in Pakistan, June 2007 and super typhoon ...

Murphy, Maurice D

2008-01-01T23:59:59.000Z

110

A Bayesian Forecast Model of Australian Region Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

A new and potentially skillful seasonal forecast model of tropical cyclone formation [tropical cyclogenesis (TCG)] is developed for the Australian region. The model is based on Poisson regression using the Bayesian approach. Predictor combinations ...

Angelika Werner; Neil J. Holbrook

2011-12-01T23:59:59.000Z

111

Automatic tropical cyclone eye fix using genetic algorithm  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) are weather systems with vast destructive power. To forecast TC tracks, forecasters need to locate their circulation centers, or eyes. This eye fix process is often done manually in practice. Since subjective elements are involved ... Keywords: Genetic algorithm, Meteorological computing, Tropical cyclone eye fix, Weather forecasting, Weather system modeling

Ka Yan Wong; Chi Lap Yip; Ping Wah Li

2008-01-01T23:59:59.000Z

112

A Rapid Loss Index for Tropical Cyclone Disasters in China  

Science Conference Proceedings (OSTI)

Disaster emergency response needs rapid estimation on disaster loss. In China it is of great importance to develop a loss index for rapidly assessing tropical cyclone (TC) disaster loss. In this paper, a new composite loss index for TC landing on China ... Keywords: Tropical Cyclone, Disaster, Loss Index, Rapid Loss Assessment

Ying Li; Weihua Fang

2012-06-01T23:59:59.000Z

113

Assessing the Skill of Operational Atlantic Seasonal Tropical Cyclone Forecasts  

Science Conference Proceedings (OSTI)

Since 1984, W. Gray of Colorado State University and a team of researchers have been issuing seasonal tropical cyclone forecasts for the North Atlantic Ocean. Prior to this, little work had been done in the area of long-term tropical cyclone ...

Brian F. Owens; Christopher W. Landsea

2003-02-01T23:59:59.000Z

114

Tropical Cyclone Climatology in a 10-km Global Atmospheric GCM: Toward Weather-Resolving Climate Modeling  

Science Conference Proceedings (OSTI)

Northern Hemisphere tropical cyclone (TC) activity is investigated in multiyear global climate simulations with the ECMWF Integrated Forecast System (IFS) at 10-km resolution forced by the observed records of sea surface temperature and sea ice. ...

Julia V. Manganello; Kevin I. Hodges; James L. Kinter III; Benjamin A. Cash; Lawrence Marx; Thomas Jung; Deepthi Achuthavarier; Jennifer M. Adams; Eric L. Altshuler; Bohua Huang; Emilia K. Jin; Cristiana Stan; Peter Towers; Nils Wedi

2012-06-01T23:59:59.000Z

115

Use of a Genesis Potential Index to Diagnose ENSO Effects on Tropical Cyclone Genesis  

Science Conference Proceedings (OSTI)

ENSO (El Niño–Southern Oscillation) has a large influence on tropical cyclone activity. The authors examine how different environmental factors contribute to this influence, using a genesis potential index developed by Emanuel and Nolan. Four ...

Suzana J. Camargo; Kerry A. Emanuel; Adam H. Sobel

2007-10-01T23:59:59.000Z

116

Tropical cyclones within the sedimentary record : analyzing overwash deposition from event to millennial timescales  

E-Print Network (OSTI)

Tropical cyclone activity over the last 5000 years is investigated using overwash sediments from coastal lagoons on the islands of Vieques, Puerto Rico and Koshikijima, Japan. A simple sediment transport model can reproduce ...

Woodruff, Jonathan Dalrymple

2009-01-01T23:59:59.000Z

117

Prediction and Diagnosis of Tropical Cyclone Formation in an NWP System. Part II: A Diagnosis of Tropical Cyclone Chris Formation  

Science Conference Proceedings (OSTI)

This is the second 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). The primary TC-LAPS vortex enhancement mechanism (convergence/...

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

2006-12-01T23:59:59.000Z

118

Different Pacific Ocean Warming Decaying Types and Northwest Pacific Tropical Cyclone Activity  

Science Conference Proceedings (OSTI)

This study focuses on statistical analysis of anomalous TC activities and the physical mechanisms behind these anomalies. Different patterns of decaying of the warm sea surface temperature anomaly (SSTA) over the equatorial central-eastern Pacific ...

Yao Ha; Zhong Zhong; Xiuqun Yang; Yuan Sun

119

Cloud to ground lightning in tropical cyclone: a study of 34 West Atlantic tropical cyclones from 1986-1996  

E-Print Network (OSTI)

Cloud to ground (CG) lightning characteristics and patterns were investigated for 34 tropical cyclones for the time period 1986 to 1996. Spatial analysis of CG lightning relative to both compass directions and the direction of motion were compiled. Additionally, a radial analysis of this data was performed within both a 300 km radius and a 50 km radius range. Finally, all analyses were stratified into all tropical cyclones and hurricane categories for further consideration. The National Lightning Detection Network recorded 307,593 CG lightning flashes within 300 km of the storms in this study. Negative flashes had an average first stroke peak current of -49 kA and a mean multiplicity of 2.7. Positive flashes occurred at a rate of 5.3 percent, with a mean peak current of 43 kA and 1.2 multiplicity average. Detected CG lightning characteristics changed significantly with a network upgrade in 1994. CG lightning flashes for all tropical cyclones favored the area south and west of the cyclone center. However, taking into account storm relative motion, the majority of flashes shifts to the front and right sections of the storm. Radial plots indicated lightning frequency increased throughout the domain, with a maximum between 270 km and 300 km. Hurricanes, however, indicated flashes occurred most often in the north and east quadrants. When adjusting for storm motion, the activity shifts to the right with some evidence of individual rainbands in the rear section. Radial plots indicated the increased organization of hurricanes, with a weak maxima in the convective eyewall, a minimum in the stratiform area, and a strong maximum in the outer rainbands. Further analysis indicated a higher frequency of CG lightning flashes in hurricanes suggests a state of hurricane strengthening or weakening. However, there was no direct correlation in the observed lightning frequency with a given change in the central pressure of the hurricane.

Coyne, John Michael

2001-01-01T23:59:59.000Z

120

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

Note: This page contains sample records for the topic "tropical cyclone activity" 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

The Impact of Observational Technology on Climate Database Quality: Tropical Cyclones in the Tasman Sea  

Science Conference Proceedings (OSTI)

The recorded climatology of tropical cyclones that affect the Tasman Sea spans the period from 1911 to the present. This climatology is a subset of the much larger Australian Tropical Cyclone database, which is the official record of all tropical ...

Bruce W. Buckley; Lance M. Leslie; Milton S. Speer

2003-08-01T23:59:59.000Z

122

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

123

Global Distribution of Hot Towers in Tropical Cyclones Based on 11-Yr TRMM Data  

Science Conference Proceedings (OSTI)

Global distribution of hot towers in tropical cyclones (TCs) is statistically quantified using an 11-yr Tropical Rainfall Measuring Mission (TRMM) Tropical Cyclone Precipitation Feature (TCPF) database. From 6003 individual TRMM overpasses of 869 ...

Cheng Tao; Haiyan Jiang

2013-02-01T23:59:59.000Z

124

Classifying North Atlantic Tropical Cyclone Tracks by Mass Moments  

Science Conference Proceedings (OSTI)

A new method for classifying tropical cyclones or similar features is introduced. The cyclone track is considered as an open spatial curve, with the wind speed or power information along the curve considered to be a mass attribute. The first and ...

Jennifer Nakamura; Upmanu Lall; Yochanan Kushnir; Suzana J. Camargo

2009-10-01T23:59:59.000Z

125

Estimating Local Memory of Tropical Cyclones through MPI Anomaly Evolution  

Science Conference Proceedings (OSTI)

This study examines the local memory of atmospheric and oceanic changes associated with a tropical cyclone (TC). The memory is quantified through anomalous maximum potential intensity (MPI) evolution for 20 days prior to the arrival of a TC ...

Robert E. Hart; Ryan N. Maue; Michael C. Watson

2007-12-01T23:59:59.000Z

126

Axisymmetric, Primitive Equation, Spectral Tropical Cyclone Model. Part I: Formulation  

Science Conference Proceedings (OSTI)

Beginning with the nine nonlinear governing equations for the simplest three-layer, axisymmetric, primitive equation, tropical cyclone model, we first introduce a vertical transform which decouples the linear part of the dynamics into three sets (...

Wayne H. Schubert; Mark DeMaria

1985-06-01T23:59:59.000Z

127

Estimating Tropical Cyclone Intensity from Infrared Image Data  

Science Conference Proceedings (OSTI)

This paper describes results from a near-real-time objective technique for estimating the intensity of tropical cyclones from satellite infrared imagery in the North Atlantic Ocean basin. The technique quantifies the level of organization or ...

Miguel F. Piñeros; Elizabeth A. Ritchie; J. Scott Tyo

2011-10-01T23:59:59.000Z

128

Do Gravity Waves Transport Angular Momentum away from Tropical Cyclones?  

Science Conference Proceedings (OSTI)

Previous studies have suggested that gravity waves can transport a significantly large amount of angular momentum away from tropical cyclones, as much as 10% of the core angular momentum per hour. These previous studies used the shallow-water ...

Yumin Moon; David S. Nolan

2010-01-01T23:59:59.000Z

129

Kelvin-Type Coastal Surges Generated by Tropical Cyclones  

Science Conference Proceedings (OSTI)

Measurements of sea level along the coat of Western Australia during the period 1969 to 1982. when 12 southward moving tropical cyclones occurred, showed distinct peaks with amplitudes of about 1 to 2 m propagating southwards with speeds ranging ...

C. B. Fandry; L. M. Leslie; R. K. Steedman

1984-03-01T23:59:59.000Z

130

A Simplified System of Equations for Simulation of Tropical Cyclones  

Science Conference Proceedings (OSTI)

A simplified system of equations which can simulate the development and mature stages of tropical cyclones is presented. The model is similar to that presented by Ooyama, except that the assumption of incompressible fluid layers is relaxed. ...

Mark DeMaria; John D. Pickle

1988-05-01T23:59:59.000Z

131

Tropical Cyclone Observation and Forecasting with and without Aircraft Reconnaissance  

Science Conference Proceedings (OSTI)

The contributions of aircraft reconnaissance to the accuracy of tropical cyclone center positioning, motion, and intensity determinations are examined, along with their impact on the accuracy of track and intensity forecasting. The analyses ...

Joel D. Martin; William M. Gray

1993-12-01T23:59:59.000Z

132

Movement and Vertical Coupling of Adiabatic Baroclinic Tropical Cyclones  

Science Conference Proceedings (OSTI)

The vertical coupling and movement of an adiabatic baroclinic tropical cyclone (TC) are investigated through two numerical experiments in which the TC is affected by either a vertical environmental shear or a differential beta drift. In both ...

Liguang Wu; Bin Wang

2001-07-01T23:59:59.000Z

133

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

134

Objective Tropical Cyclone Center Tracking Using Single-Doppler Radar  

Science Conference Proceedings (OSTI)

This study presents an extension of the ground-based velocity track display (GBVTD)-simplex tropical cyclone (TC) circulation center–finding algorithm to further improve the accuracy and consistency of TC center estimates from single-Doppler radar ...

Michael M. Bell; Wen-Chau Lee

2012-05-01T23:59:59.000Z

135

Tropical Cyclone Motion. A Comparison of Theory and Observation  

Science Conference Proceedings (OSTI)

The analytic predictions of tropical cyclone motion by Holland are shown to be in very good agreement with observations in the Australian southwest Pacific region. These results indicate that a combined linear asymmetric advection and divergence ...

Greg J. Holland

1984-01-01T23:59:59.000Z

136

Tropical Cyclone Tracking Using a Neighbor Enclosed Area Tracking Algorithm  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) tracking is essential for calculating TC statistics from gridded datasets. A new method for TC tracking is presented here using neighbor enclosed area tracking (NEAT), which is based on the temporal overlap of enclosed areas ...

Yuya Satake; Masaru Inatsu; Masato Mori; Akira Hasegawa

2013-10-01T23:59:59.000Z

137

Probabilistic Prediction of Tropical Cyclones. Part II: Intensity  

Science Conference Proceedings (OSTI)

A new objective aid for operational probabilistic intensity (defined as maximum wind speed) prediction of tropical cyclones is presented. Based on statistical analyses of the performance of all operationally available numerical models (using ...

Harry C. Weber

2005-07-01T23:59:59.000Z

138

Probabilistic Prediction of Tropical Cyclones. Part I: Position  

Science Conference Proceedings (OSTI)

A new objective aid for operational prediction of the positions of tropical cyclones is presented. Its method is based on a simple analysis of the performance of all operationally available numerical models during a training period. In a ...

Harry C. Weber

2005-07-01T23:59:59.000Z

139

CISK or WISHE as the Mechanism for Tropical Cyclone Intensification  

Science Conference Proceedings (OSTI)

Examination of conditional instability of the second kind (CISK) and wind-induced surface heat exchange (WISHE), two proposed mechanisms for tropical cyclone and polar low intensification, suggests that the sensitivity of the intensification rate ...

George C. Craig; Suzanne L. Gray

1996-12-01T23:59:59.000Z

140

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

Note: This page contains sample records for the topic "tropical cyclone activity" 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

A Simplified Dynamical System for Tropical Cyclone Intensity Prediction  

Science Conference Proceedings (OSTI)

A simplified dynamical system for tropical cyclone intensity prediction based on a logistic growth equation (LGE) is developed. The time tendency of the maximum sustained surface winds is proportional to the sum of two terms: a growth term and a ...

Mark DeMaria

2009-01-01T23:59:59.000Z

142

Tropical Cyclone Inner-Core Kinetic Energy Evolution  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) destructive potential is highly dependent on the distribution of the surface wind field. To gain a better understanding of wind structure evolution, TC 0–200-km wind fields from aircraft reconnaissance flight-level data are ...

Katherine S. Maclay; Mark DeMaria; Thomas H. Vonder Haar

2008-12-01T23:59:59.000Z

143

Generation of Moving Spiral Bands in Tropical Cyclones  

Science Conference Proceedings (OSTI)

A theory based on the shallow water equation is developed to explain the generation of moving spiral-banded structures in tropical cyclones. The theory proposes that fluctuation of the vorticity distribution in the compact core region can act as ...

K. C. Chow; Kwing L. Chan; Alexis K. H. Lau

2002-10-01T23:59:59.000Z

144

Vertical Velocity Structures in an Axisymmetric, Nonhydrostatic Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

A statistical analysis of several experiments with different microphysical parameterizations in an axisymmetric, nonhydrostatic tropical cyclone model illustrates the impact of icc-phase microphysics on model vertical velocity structure. The ...

Stephen J. Lord; Jacqueline M. Lord

1988-05-01T23:59:59.000Z

145

Influence of cloud-radiative forcing on tropical cyclone structure  

Science Conference Proceedings (OSTI)

We demonstrate how and why cloud-radiative forcing (CRF), the interaction of hydrometeors with longwave and shortwave radiation, can influence tropical cyclone structure through “semi-idealized” integrations of the Hurricane Weather Research and ...

Yizhe Peggy Bu; Robert G. Fovell; Kristen L. Corbosiero

146

A Potential Vorticity Tendency Diagnostic Approach for Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

In order to understand the roles of various physical processes in baroclinic tropical cyclone (TC) motion and the vertical coupling between the upper- and lower-level circulations, a new dynamical framework is advanced. A TC is treated as a ...

Liguang Wu; Bin Wang

2000-06-01T23:59:59.000Z

147

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

148

Tropical cyclone eye fix using genetic algorithm with temporal information  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) are weather systems with vast destructive power. To give early TC warnings, accurate location of their circulation centers, or “eyes”, is required. The pattern matching solution to this TC eye fix problem works by ...

Ka Yan Wong; Chi Lap Yip

2005-09-01T23:59:59.000Z

149

Rapid Development of the Tropical Cyclone Warm Core  

Science Conference Proceedings (OSTI)

This paper presents a simple theoretical argument to isolate the conditions under which a tropical cyclone can rapidly develop a warm-core thermal structure and subsequently approach a steady state. The theoretical argument is based on the ...

Jonathan L. Vigh; Wayne H. Schubert

2009-11-01T23:59:59.000Z

150

A Comparison of Two Tropical Cyclone Bogussing Schemes  

Science Conference Proceedings (OSTI)

The impact of two bogussing schemes on tropical cyclone (TC) forecasts is compared. One scheme for bogussing TCs into the initial conditions of the nonhydrostatic version of the fifth-generation Pennsylvania State University–National Center for ...

Dongliang Wang; Xudong Liang; Ying Zhao; Bin Wang

2008-02-01T23:59:59.000Z

151

Effects of Vertical Wind Shear on Tropical Cyclone Precipitation  

Science Conference Proceedings (OSTI)

The response of the precipitation field for tropical cyclones in relation to the surrounding environmental vertical wind shear has been investigated using 20 000 snapshots of passive-microwave satellite rain rates. Composites of mean rain rates, ...

Matthew T. Wingo; Daniel J. Cecil

2010-03-01T23:59:59.000Z

152

Seasonal versus permanent thermocline warming by tropical cyclones  

E-Print Network (OSTI)

Recent studies suggest that the enhanced upper ocean mixing caused by tropical cyclones significantly contributes to the ocean heat transport. However, existing studies that try to quantify this contribution make the ...

Ferrari, Raffaele

153

The effects of ocean eddies on tropical cyclones  

E-Print Network (OSTI)

The purpose of this study is to understand the interactions of tropical cyclones with ocean eddies. In particular we examine the influence of a cold-core eddy on the cold wake formed during the passage of Typhoon Fanapi ...

Miltenberger, Alexander Reid

2012-01-01T23:59:59.000Z

154

An elastic contour matching model for tropical cyclone pattern recognition  

Science Conference Proceedings (OSTI)

In this paper, an elastic graph dynamic link model (EGDLM) based on elastic contour matching is proposed to automate the Dvorak technique for tropical cyclone (TC) pattern interpretation from satellite images. This method integrates traditional dynamic ...

R. S.T. Lee; J. N.K. Lin

2001-06-01T23:59:59.000Z

155

Impact of Duration Thresholds on Atlantic Tropical Cyclone Counts  

Science Conference Proceedings (OSTI)

Records of Atlantic basin tropical cyclones (TCs) since the late nineteenth century indicate a very large upward trend in storm frequency. This increase in documented TCs has been previously interpreted as resulting from anthropogenic climate ...

Christopher W. Landsea; Gabriel A. Vecchi; Lennart Bengtsson; Thomas R. Knutson

2010-05-01T23:59:59.000Z

156

Experiments with a Simple Tropical Cyclone Intensity Consensus  

Science Conference Proceedings (OSTI)

Consensus forecasts (forecasts created by combining output from individual forecasts) have become an integral part of operational tropical cyclone track forecasting. Consensus aids, which generally have lower average errors than individual models,...

Charles R. Sampson; James L. Franklin; John A. Knaff; Mark DeMaria

2008-04-01T23:59:59.000Z

157

Sensitivity of Tropical Cyclone Forecasts as Revealed by Singular Vectors  

Science Conference Proceedings (OSTI)

Singular vector (SV) sensitivity, calculated using the adjoint model of the U.S. Navy Operation Global Atmosphere Prediction System (NOGAPS), is used to study the dynamics associated with tropical cyclone evolution. For each model-predicted ...

Melinda S. Peng; Carolyn A. Reynolds

2006-10-01T23:59:59.000Z

158

On the Height of the Warm Core in Tropical Cyclones  

Science Conference Proceedings (OSTI)

The warm-core structure of tropical cyclones is examined in idealized simulations using the Weather Research and Forecasting (WRF) Model. The maximum perturbation temperature in a control simulation occurs in the midtroposphere (5–6 km), in ...

Daniel P. Stern; David S. Nolan

2012-05-01T23:59:59.000Z

159

Climatological Variations in North Atlantic Tropical Cyclone Tracks  

Science Conference Proceedings (OSTI)

This study investigates the relationship between tropical cyclone (TC) tracks and climatological variations in large-scale environmental parameters associated with the TC steering flow. By using the Atlantic Ocean hurricane database for 1950–2010, ...

Angela J. Colbert; Brian J. Soden

2012-01-01T23:59:59.000Z

160

The Response of Quasigeostrophic Oceanic Vortices to Tropical Cyclone Forcing  

Science Conference Proceedings (OSTI)

The response of quasigeostrophic (QG) oceanic vortices to tropical cyclone (TC) forcing is investigated using an isopycnic ocean model. Idealized oceanic currents and wind fields derived from observational data acquired during Hurricane Katrina ...

Benjamin Jaimes; Lynn K. Shay; George R. Halliwell

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

A Comprehensive Test of the Navy Nested Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

The tropical cyclone forecasting skill level of the Joint Typhoon Warning Center (JTWC) has reached a plateau and has shown little or no lasting improvement during the last 10 years. Because JTWC relies on an array of statistical and ...

Edward J. Harrison Jr.; Michael Fiorino

1982-07-01T23:59:59.000Z

162

Quantifying Environmental Control on Tropical Cyclone Intensity Change  

Science Conference Proceedings (OSTI)

Composite analysis is used to examine environmental and climatology and persistence characteristics of tropical cyclones (TCs) undergoing different intensity changes in the western North Pacific (WPAC) and North Atlantic (ATL) ocean basins. Using ...

Eric A. Hendricks; Melinda S. Peng; Bing Fu; Tim Li

2010-08-01T23:59:59.000Z

163

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

164

Wind Profiles in Tropical Cyclone Stratiform Rainbands over Land  

Science Conference Proceedings (OSTI)

Observations of 14 stratiform periods in outer tropical cyclone rainbands are used to evaluate wind structure using a velocity–azimuth display (VAD) technique applied to KAMX (Miami) Weather Surveillance Radar-1988 Doppler (WSR-88D) data. These 14 ...

Shaunna L. Donaher; Bruce A. Albrecht; Ming Fang; William Brown

2013-11-01T23:59:59.000Z

165

Improving Tropical Cyclone Intensity Guidance in the Eastern North Pacific  

Science Conference Proceedings (OSTI)

The primary objective of this research is the development of a statistical model that will provide tropical cyclone (TC) intensity guidance for the eastern North Pacific (ENP) superior to that provided by climatology and persistence models. ...

Kevin R. Petty; Jay S. Hobgood

2000-04-01T23:59:59.000Z

166

An Error Analysis of Atlantic Tropical Cyclone Track Guidance Models  

Science Conference Proceedings (OSTI)

Mean track forecast errors over the 6-yr period 1983–88 are compared for four tropical cyclone-track forecast models in use at the National Hurricane Center (NHC). The model types represented are statistical, statistical-dynamical, barctropic-...

Mark Demaria; Miles B. Lawrence; James T. Kroll

1990-03-01T23:59:59.000Z

167

Interpretation of Adaptive Observing Guidance for Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Adaptive observing guidance products for Atlantic tropical cyclones are compared using composite techniques that allow one to quantitatively examine differences in the spatial structures of the guidance maps and relate these differences to the ...

C. A. Reynolds; M. S. Peng; S. J. Majumdar; S. D. Aberson; C. H. Bishop; R. Buizza

2007-12-01T23:59:59.000Z

168

Reexamination of Tropical Cyclone Wind–Pressure Relationships  

Science Conference Proceedings (OSTI)

Tropical cyclone wind–pressure relationships are reexamined using 15 yr of minimum sea level pressure estimates, numerical analysis fields, and best-track intensities. Minimum sea level pressure is estimated from aircraft reconnaissance or ...

John A. Knaff; Raymond M. Zehr

2007-02-01T23:59:59.000Z

169

A New Assessment of the Predictability of Tropical Cyclone Tracks  

Science Conference Proceedings (OSTI)

The inherent predictability of tropical cyclone tracks has received much attention since the 1980s. It is still an issue because of the recent improvement of track forecasts by numerical models. The aim of this study is to assess this ...

Matthieu Plu

2011-11-01T23:59:59.000Z

170

A New Parametric Tropical Cyclone Tangential Wind Profile Model  

Science Conference Proceedings (OSTI)

A new parametric tropical cyclone (TC) wind profile model is presented for depicting representative surface pressure profiles corresponding to multiple-maxima wind profiles that exhibit single-, dual-, and triple-maximum concentric-eyewall wind ...

Vincent T. Wood; Luther W. White; Hugh E. Willoughby; David P. Jorgensen

2013-06-01T23:59:59.000Z

171

On the Squall Lines Preceding Landfalling Tropical Cyclones in China  

Science Conference Proceedings (OSTI)

Based on a 3-yr (2007–09) mosaic of radar reflectivity and conventional surface and synoptic radiosonde observations, the general features of squall lines preceding landfalling tropical cyclones (TCs) (pre-TC) in China are examined and compared ...

Zhiyong Meng; Yunji Zhang

2012-02-01T23:59:59.000Z

172

Tropical Cyclone Damages in China 1983–2006  

Science Conference Proceedings (OSTI)

Based on damage records released by the Department of Civil Affairs of China, direct economic losses and casualties associated with tropical cyclones that made landfall over China during 1983–2006 are examined. In an average year, landfalling ...

Qiang Zhang; Qiufeng Liu; Liguang Wu

2009-04-01T23:59:59.000Z

173

An Overview of the China Meteorological Administration Tropical Cyclone Database  

Science Conference Proceedings (OSTI)

The China Meteorological Administration’s tropical cyclone (TC) database includes not only the best track dataset, but also TC-induced wind and precipitation data. This article summarizes the characteristics and key technical details of the CMA TC ...

Ming Ying; Wei Zhang; Hui Yu; Xiaoqin Lu; Jingxian Feng; Yongxiang Fan; Yongti Zhu; Dequan Chen

174

Some Aspects of Vortex Structure Related to Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

Some effect of tropical cyclone structure on the vortex motion are examined in a nondivergent, barotropic numerical model with no basic current. As suggested earlier by DeMaria, the initial maximum wind speed has little effect on the track. ...

Michael Fiorino; Russell L. Elsberry

1989-04-01T23:59:59.000Z

175

A Highly Configurable Vortex Initialization Method for Tropical Cyclones  

Science Conference Proceedings (OSTI)

A highly configurable vortex initialization methodology has been constructed in order to permit manipulation of the initial vortex structure in numerical models of tropical cyclones. By using distinct specifications of the flow in the boundary ...

Eric D. Rappin; David S. Nolan; Sharanya J. Majumdar

2013-10-01T23:59:59.000Z

176

An Adaptive Multigrid Barotropic Tropical Cyclone Track Model  

Science Conference Proceedings (OSTI)

This paper describes the application of adaptive multigrid techniques to the problem of tropical cyclone track prediction. Based on the nondivergent barotropic vorticity equation, the model uses an adaptive multigrid method to refine the mesh ...

Scott R. Fulton

2001-01-01T23:59:59.000Z

177

Prediction of Consensus Tropical Cyclone Track Forecast Error  

Science Conference Proceedings (OSTI)

The extent to which the tropical cyclone (TC) track forecast error of a consensus model (CONU) routinely used by the forecasters at the National Hurricane Center can be predicted is determined. A number of predictors of consensus forecast error, ...

James S. Goerss

2007-05-01T23:59:59.000Z

178

Influence of Environmental Humidity on Tropical Cyclone Size  

Science Conference Proceedings (OSTI)

Observations demonstrate that the radius of maximum winds in tropical cyclones (TCs) can vary by an order of magnitude; similar size differences are evident in other spatial measures of the wind field as well as in cloud and precipitation fields. ...

Kevin A. Hill; Gary M. Lackmann

2009-10-01T23:59:59.000Z

179

Tropical Cyclone Motion: Environmental Interaction Plus a Beta Effect  

Science Conference Proceedings (OSTI)

The dynamics of tropical cyclone motion are investigated by solving for instantaneous motion tendencies using the divergent barotropic vorticity equation on a beta plane. Two methods of solution are presented a direct analytic solution for a ...

Greg J. Holland

1983-02-01T23:59:59.000Z

180

Evaluation of multiple dynamic initialization schemes for tropical cyclone prediction  

Science Conference Proceedings (OSTI)

Three different dynamic initialization schemes for tropical cyclone (TC) prediction in numerical prediction systems are described and evaluated. The first scheme involves the removal of the analyzed vortex, followed by insertion of a dynamically-...

Eric A. Hendricks; Melinda S. Peng; Tim Li

Note: This page contains sample records for the topic "tropical cyclone activity" 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 Highly Configurable Vortex Initialization Method for Tropical Cyclones  

Science Conference Proceedings (OSTI)

A highly configurable vortex initialization methodology has been constructed in order to permit manipulation of the initial vortex structure in numerical models of tropical cyclones. By using distinct specifications of the flow in the boundary ...

Eric D. Rappin; David S. Nolan; Sharanya J. Majumdar

182

Uncertainty of Tropical Cyclone Best-Track Information  

Science Conference Proceedings (OSTI)

With the growing use of tropical cyclone (TC) best-track information for weather and climate applications, it is important to understand the uncertainties that are contained in the TC position and intensity information. Here, an attempt is made to ...

Ryan D. Torn; Chris Snyder

2012-06-01T23:59:59.000Z

183

Tropical cyclone tracking using a neighbor enclosed area tracking algorithm  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) tracking is essential for calculating TC statistics from gridded datasets. A new method for TC tracking is presented here using neighbor enclosed area tracking (NEAT), which is based on the temporal overlap of enclosed areas ...

Yuya Satake; Masaru Inatsu; Masato Mori; Akira Hasegawa

184

The Contribution of Ex–Tropical Cyclone Gert (1999) toward the Weakening of a Midlatitude Cyclogenesis Event  

Science Conference Proceedings (OSTI)

Tropical Cyclone Gert (1999) experienced an extratropical transition while it merged with an extratropical cyclone upstream. The upstream extratropical cyclone had started to intensify before it merged with the transitioning tropical cyclone, and ...

Anna Agustí-Panareda

2008-06-01T23:59:59.000Z

185

Models of Tropical Cyclone Wind Distribution and Beta-Effect Propagation for Application to Tropical Cyclone Track Forecasting  

Science Conference Proceedings (OSTI)

A model of the tangential wind speed in the outer regions of tropical cyclones is proposed based on approximate conservation of angular momentum. The purpose is to derive an operationally useful model of the beta-effect propagation (BEP), which ...

Lester E. Carr III; Russell L. Elsberry

1997-12-01T23:59:59.000Z

186

Tropical Indian Ocean Influence on Northwest Pacific Tropical Cyclones in Summer following Strong El Niño  

Science Conference Proceedings (OSTI)

In the summer following a strong El Niño, tropical cyclone (TC) number decreases over the Northwest (NW) Pacific despite little change in local sea surface temperature. The authors’ analysis suggests El Niño–induced tropical Indian Ocean (TIO) ...

Yan Du; Lei Yang; Shang-Ping Xie

2011-01-01T23:59:59.000Z

187

Classifying North Atlantic Tropical Cyclone Tracks by Mass Moments*  

E-Print Network (OSTI)

A new method for classifying tropical cyclones or similar features is introduced. The cyclone track is considered as an open spatial curve, with the wind speed or power information along the curve considered to be a mass attribute. The first and second moments of the resulting object are computed and then used to classify the historical tracks using standard clustering algorithms. Mass moments allow the whole track shape, length, and location to be incorporated into the clustering methodology. Tropical cyclones in the North Atlantic basin are clustered with K-means by mass moments, producing an optimum of six clusters with differing genesis locations, track shapes, intensities, life spans, landfalls, seasonal patterns, and trends. Even variables that are not directly clustered show distinct separation between clusters. A trend analysis confirms recent conclusions of increasing tropical cyclones in the basin over the past two decades. However, the trends vary across clusters. 1.

Yochanan Kushnir; Suzana; J. Camargo

2008-01-01T23:59:59.000Z

188

An Analysis of NCEP Tropical Cyclone Vitals and Potential Effects on Forecasting Models  

Science Conference Proceedings (OSTI)

This study analyzes the Tropical Cyclone Vitals Database (TCVitals), which contains cyclone location, intensity, and structure information, generated in real time by forecasters. These data are used to initialize cyclones in several NCEP ...

Sam Trahan; Lynn Sparling

2012-06-01T23:59:59.000Z

189

The Extratropical Transition of Tropical Cyclones: Forecast Challenges, Current Understanding, and Future Directions  

Science Conference Proceedings (OSTI)

A significant number of tropical cyclones move into the midlatitudes and transform into extratropical cyclones. This process is generally referred to as extratropical transition (ET). During ET a cyclone frequently produces intense rainfall and ...

Sarah C. Jones; Patrick A. Harr; Jim Abraham; Lance F. Bosart; Peter J. Bowyer; Jenni L. Evans; Deborah E. Hanley; Barry N. Hanstrum; Robert E. Hart; François Lalaurette; Mark R. Sinclair; Roger K. Smith; Chris Thorncroft

2003-12-01T23:59:59.000Z

190

The Influence of Airborne Doppler Radar Data Quality on Numerical Simulations of a Tropical Cyclone  

Science Conference Proceedings (OSTI)

The impact of airborne Doppler radar data assimilation on improving numerical simulations of tropical cyclones (TCs) has been well recognized. However, the influence of radar data quality on the numerical simulation of tropical cyclones has not ...

Lei Zhang; Zhaoxia Pu; Wen-Chau Lee; Qingyun Zhao

2012-02-01T23:59:59.000Z

191

Characteristics of Landfalling Tropical Cyclones in the United States and Mexico: Climatology and Interannual Variability  

Science Conference Proceedings (OSTI)

The climatology and interannual variability of landfalling tropical cyclones and their impacts on precipitation in the continental United States and Mexico are examined. The analysis is based on National Hurricane Center 6-hourly tropical cyclone ...

Joshua Larson; Yaping Zhou; R. Wayne Higgins

2005-04-01T23:59:59.000Z

192

Objective Guidance for Use in Setting Tropical Cyclone Conditions of Readiness  

Science Conference Proceedings (OSTI)

The Department of Defense uses a Tropical Cyclone Conditions of Readiness (TC-CORs) system to prepare bases and evacuate assets and personnel in advance of adverse weather associated with tropical cyclones (TCs). TC-CORs are recommended by weather ...

Charles R. Sampson; Andrea B. Schumacher; John A. Knaff; Mark DeMaria; Edward M. Fukada; Chris A. Sisko; David P. Roberts; Katherine A. Winters; Harold M. Wilson

2012-08-01T23:59:59.000Z

193

Formation and Quasi-Periodic Behavior of Outer Spiral Rainbands in a Numerically Simulated Tropical Cyclone  

Science Conference Proceedings (OSTI)

The formation and quasi-periodic behavior of outer spiral rainbands in a tropical cyclone simulated in the cloud-resolving tropical cyclone model version 4 (TCM4) are analyzed. The outer spiral rainbands in the simulation are preferably initiated ...

Qingqing Li; Yuqing Wang

2012-03-01T23:59:59.000Z

194

Assimilation of Tropical Cyclone Track and Structure Based on the Ensemble Kalman Filter (EnKF)  

Science Conference Proceedings (OSTI)

A new tropical cyclone vortex initialization method based on the ensemble Kalman filter (EnKF) is proposed in this study. Three observed parameters that are related to the tropical cyclone (TC) track and structure—center position, velocity of ...

Chun-Chieh Wu; Guo-Yuan Lien; Jan-Huey Chen; Fuqing Zhang

2010-12-01T23:59:59.000Z

195

Application of Airborne Passive Microwave Observations for Monitoring Inland Flooding Caused by Tropical Cyclones  

Science Conference Proceedings (OSTI)

Inland flooding from tropical cyclones is a significant factor in storm-related deaths in the United States and other countries, with the majority of tropical cyclone fatalities recorded in the United States resulting from freshwater flooding. ...

Courtney D. Buckley; Robbie E. Hood; Frank J. LaFontaine

2009-10-01T23:59:59.000Z

196

Evaluation of Wave Forecasts Consistent with Tropical Cyclone Warning Center Wind Forecasts  

Science Conference Proceedings (OSTI)

An algorithm to generate wave fields consistent with forecasts from the official U.S. tropical cyclone forecast centers has been made available in near–real time to forecasters since summer 2007. The algorithm removes the tropical cyclone from ...

Charles R. Sampson; Paul A. Wittmann; Efren A. Serra; Hendrik L. Tolman; Jessica Schauer; Timothy Marchok

2013-02-01T23:59:59.000Z

197

Modeling Return Periods of Tropical Cyclone Intensities in the Vicinity of Hawaii  

Science Conference Proceedings (OSTI)

Tropical cyclones in the vicinity of Hawaii have resulted in great property damage. An estimate of the return periods of tropical cyclone intensities is of particular interest to governments, public interest groups, and private sectors.

Pao-Shin Chu; Jianxin Wang

1998-09-01T23:59:59.000Z

198

Tropical Cyclone Intensity Change before U.S. Gulf Coast Landfall  

Science Conference Proceedings (OSTI)

Tropical cyclone intensity change remains a forecasting challenge with important implications for such vulnerable areas as the U.S. coast along the Gulf of Mexico. Analysis of 1979–2008 Gulf tropical cyclones during their final two days before ...

Edward N. Rappaport; James L. Franklin; Andrea B. Schumacher; Mark DeMaria; Lynn K. Shay; Ethan J. Gibney

2010-10-01T23:59:59.000Z

199

The Impact of Ice Phase Cloud Parameterizations on Tropical Cyclone Prediction  

Science Conference Proceedings (OSTI)

The impact of ice phase cloud microphysical processes on prediction of tropical cyclone environment is examined for two microphysical parameterizations using the Coupled Ocean / Atmosphere Mesoscale Prediction System –Tropical Cyclone model. An ...

Yi Jin; Shouping Wang; Jason Nachamkin; James D. Doyle; Gregory Thompson; Louis Grasso; Teddy Holt; Jon Moskaitis; Hao Jin; Richard M. Hodur; Qingyun Zhao; Ming Liu; Mark DeMaria

200

Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model  

E-Print Network (OSTI)

The sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation ...

Tang, Brian

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Analysis of north atlantic tropical cyclone intensify change using data mining  

Science Conference Proceedings (OSTI)

Tropical cyclones (TC), especially when their intensity reaches hurricane scale, can become a costly natural hazard. Accurate prediction of tropical cyclone intensity is very difficult because of inadequate observations on TC structures, poor ...

Jiang Tang / Ruixin Yang

2010-01-01T23:59:59.000Z

202

Mining geophysical parameters through decision-tree analysis to determine correlation with tropical cyclone development  

Science Conference Proceedings (OSTI)

Correlations between geophysical parameters and tropical cyclones are essential in understanding and predicting the formation of tropical cyclones. Previous studies show that sea surface temperature and vertical wind shear significantly influence the ... Keywords: Data mining, Hurricane, Natural disaster, Prediction

Wenwen Li; Chaowei Yang; Donglian Sun

2009-02-01T23:59:59.000Z

203

A Composite Study of the Interactions between Tropical Cyclones and Upper-Tropospheric Troughs  

Science Conference Proceedings (OSTI)

The objective of this study is to understand how interactions with upper-tropospheric troughs affect the intensity of tropical cyclones. The study includes all named Atlantic tropical cyclones between 1985 and 1996. To minimize other factors ...

Deborah Hanley; John Molinari; Daniel Keyser

2001-10-01T23:59:59.000Z

204

A Southwest Pacific Tropical Cyclone Climatology and Linkages to the El Niño–Southern Oscillation  

Science Conference Proceedings (OSTI)

The new South Pacific Enhanced Archive for Tropical Cyclones (SPEArTC) dataset provides an opportunity to develop a more complete climatology of tropical cyclones (TCs) in the southwest Pacific. Here, spatial patterns and characteristics of TCs ...

Howard J. Diamond; Andrew M. Lorrey; James A. Renwick

2013-01-01T23:59:59.000Z

205

Projected Increases in North Atlantic Tropical Cyclone Intensity from CMIP5 Models  

Science Conference Proceedings (OSTI)

Tropical cyclones—particularly intense ones—are a hazard to life and property, so an assessment of the changes in North Atlantic tropical cyclone intensity has important socioeconomic implications. In this study, the authors focus on the ...

Gabriele Villarini; Gabriel A. Vecchi

2013-05-01T23:59:59.000Z

206

Tropical-Cyclone Forecasting: A Worldwide Summary of Techniques and Verification Statistics  

Science Conference Proceedings (OSTI)

Questionnaire replies from forecasters in 16 tropical-cyclone warming centers are summarized to provide an overview of the current state of the science in tropical-cyclone analysis and forecasting. Information is tabulated on the data sources and ...

John L. McBride; Greg J. Holland

1987-10-01T23:59:59.000Z

207

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

208

Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model  

Science Conference Proceedings (OSTI)

The sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation induces cooling of the ...

Brian Tang; Kerry Emanuel

2012-08-01T23:59:59.000Z

209

Tropical Cyclone Track Characteristics as a Function of Large-Scale Circulation Anomalies  

Science Conference Proceedings (OSTI)

Factors that contribute to intraseasonal variability in western North Pacific tropical cyclone track types are investigated. It is hypothesized that the 700-mb large-scale circulation can affect tropical cyclone track characteristics by enhancing ...

Patrick A. Harr; Russell L. Elsberry

1991-06-01T23:59:59.000Z

210

How Do Outer Spiral Rainbands Affect Tropical Cyclone Structure and Intensity?  

Science Conference Proceedings (OSTI)

A long-standing issue on how outer spiral rainbands affect the structure and intensity of tropical cyclones is studied through a series of numerical experiments using the cloud-resolving tropical cyclone model TCM4. Because diabatic heating due ...

Yuqing Wang

2009-05-01T23:59:59.000Z

211

How Does the Boundary Layer Contribute to Eyewall Replacement Cycles in Axisymmetric Tropical Cyclones?  

Science Conference Proceedings (OSTI)

Three diagnostic models of the axisymmetric tropical cyclone boundary layer, with different levels of approximation, are applied to the problem of tropical cyclones with concentric eyewalls. The outer eyewall is shown to have an inherently ...

Jeffrey D. Kepert

2013-09-01T23:59:59.000Z

212

How does the boundary layer contribute to eyewall replacement cycles in axisymmetric tropical cyclones?  

Science Conference Proceedings (OSTI)

Three diagnostic models of the axisymmetric tropical cyclone boundary layer, with different levels of approximation, are applied to the problem of tropical cyclones with concentric eyewalls. The outer eyewall is shown to have an inherently ...

Jeffrey D. Kepert

213

On the Potential Use of Satellite Sounder Data in Forecasting Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

Although many prediction schemes are available, tropical cyclone track forecast errors are still unacceptably large. A primary difficulty is that tropical cyclones and their environments are poorly observed by conventional data networks. ...

Stanley Q. Kidder; Kae Shyu

1984-10-01T23:59:59.000Z

214

Regional Observations during the Landfall of Tropical Cyclone Juliette (2001) in Baja California, Mexico  

Science Conference Proceedings (OSTI)

This paper presents an observational analysis of tropical cyclone landfall over the eastern Pacific Ocean. The tropical cyclone that developed during the 2001 season off the Mexican coast was named Juliette and made landfall in the Baja ...

Luis M. Farfán

2004-07-01T23:59:59.000Z

215

A Satellite Observational and Numerical Study of Precipitation Characteristics in Western North Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Special Sensor Microwave/Imager (SSM/I) observations were used to examine the spatial and temporal changes of the precipitation characteristics of tropical cyclones. SSM/I observations were also combined with the results of a tropical cyclone ...

Edward B. Rodgers; Simon W. Chang; Harold F. Pierce

1994-02-01T23:59:59.000Z

216

Response of Tropical Cyclones to Idealized Climate Change Experiments in a Global High-Resolution Coupled General Circulation Model  

Science Conference Proceedings (OSTI)

The authors present an assessment of how tropical cyclone activity might change owing to the influence of increased atmospheric carbon dioxide concentrations, using the U.K. High-Resolution Global Environment Model (HiGEM) with N144 resolution (~...

Ray Bell; Jane Strachan; Pier Luigi Vidale; Kevin Hodges; Malcolm Roberts

2013-10-01T23:59:59.000Z

217

Dynamical Tropical Cyclone Track Forecast Errors. Part I: Tropical Region Error Sources  

Science Conference Proceedings (OSTI)

All highly erroneous (>300 n mi or 555 km at 72 h) Navy Operational Global Atmospheric Prediction System (NOGAPS) and U.S. Navy version of the Geophysical Fluid Dynamics Laboratory model (GFDN) tropical cyclone track forecasts in the western ...

Lester E. Carr III; Russell L. Elsberry

2000-12-01T23:59:59.000Z

218

Tropical Cyclones and Global Climate Change: A Post-IPCC Assessment  

E-Print Network (OSTI)

The very limited instrumental record makes extensive analyses of the natural variability of global tropical cyclone activities difficult in most of the tropical cyclone basins. However, in the two regions where reasonably reliable records exist (the North Atlantic and the western North Pacific), substantial multidecadal variability (particularly for intense Atlantic hurricanes) is found, but there is no clear evidence of long-term trends. Efforts have been initiated to use geological and geomorphological records and analysis of oxygen isotope ratios in rainfall recorded in cave stalactites to establish a paleoclimate of tropical cyclones, but these have not yet produced definitive results. Recent thermodynamical estimation of the maximum potential intensities (MPI) of tropical cyclones shows good agreement with observations. Although there are some uncertainties in these MPI approaches, such as their sensitivity to variations in parameters and failure to include some potentially important interactions such as ocean spray feedbacks, the response of upperoceanic thermal structure, and eye and eyewall dynamics, they do appear to be an objective tool with which to predict present and future maxima of tropical cyclone intensity. Recent studies indicate the MPI of cyclones will remain the same or undergo a modest increase of up to 10%--20%. These predicted changes are small compared with the observed natural variations and fall within the uncertainty range in current studies. Furthermore, the known omissions (ocean spray, momentum restriction, and possibly also surface to 300-hPa lapse rate changes) could all operate to mitigate the predicted intensification. A strong caveat must be placed on analysis of results from current GCM simulations of the "tropical-cyc...

Henderson-Sellers Zhang Berz; A. Henderson-sellers; H. Zhang; G. Berz; K. Emanuel; W. Gray; G. Holl; J. Lighthill; S-l. Shieh; P. Webster; K. Mcguffie

1998-01-01T23:59:59.000Z

219

State of the Science: Radar View of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Radar played an important role in studies of tropical cyclones since it was developed in the 1940s. In the last 15 years, technological improvements such as the U.S. National Oceanic and Atmospheric Administration (NOAA) WP-3D tail airborne ...

Frank D. Marks Jr.

2003-08-01T23:59:59.000Z

220

The Detection of Flow Asymmetries in the Tropical Cyclone Environment  

Science Conference Proceedings (OSTI)

Data from a numerical simulation of a moving barotropic vortex on a sphere with 10-km resolution are used to assess the ability of a state-of-the-art objective analysis scheme to detect certain large-scale tropical cyclone asymmetries, the so-...

Michael J. Reeder; Roger K. Smith; Stephen J. Lord

1991-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

An Objective Satellite-Based Tropical Cyclone Size Climatology  

Science Conference Proceedings (OSTI)

Storm-centered infrared (IR) imagery of tropical cyclones (TCs) is related to the 850-hPa mean tangential wind at a radius of 500 km (V500) calculated from six-hourly global numerical analyses for North Atlantic and eastern North Pacific TCs 1995-...

John A. Knaff; Scott P. Longmore; Debra A. Molenar

222

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

223

Recurving Tropical Cyclones: Singular Vector Sensitivity and Downstream Impacts  

Science Conference Proceedings (OSTI)

Singular vectors (SVs) are used to study the sensitivity of 2-day forecasts of recurving tropical cyclones (TCs) in the western North Pacific to changes in the initial state. The SVs are calculated using the tangent and adjoint models of the Navy ...

Carolyn A. Reynolds; Melinda S. Peng; Jan-Huey Chen

2009-04-01T23:59:59.000Z

224

Maximum Potential Intensities of Tropical Cyclones near Isla Socorro, Mexico  

Science Conference Proceedings (OSTI)

The maximum potential intensity (MPI) of a tropical cyclone represents a theoretical upper limit to the strength of the storm imposed by the laws of physics and the energy available to the system in the atmosphere and the ocean. The MPI in this ...

Jay S. Hobgood

2003-12-01T23:59:59.000Z

225

Tropical Cyclone Destructive Potential by Integrated Kinetic Energy  

Science Conference Proceedings (OSTI)

Tropical cyclone damage potential, as currently defined by the Saffir–Simpson scale and the maximum sustained surface wind speed in the storm, fails to consider the area impact of winds likely to force surge and waves or cause particular levels ...

Mark D. Powell; Timothy A. Reinhold

2007-04-01T23:59:59.000Z

226

Automatic Template Matching Method for Tropical Cyclone Eye Fix  

Science Conference Proceedings (OSTI)

A time-honored way of finding, or fixing, the center of a tropical cyclone (TC) is to overlay templates of spirals onto a printout of radar or satellite image. Modern methods, however, mostly focus on wind field analysis, or other motion vector techniques. ...

Wong Ka Yan; Yip Chi Lap; Li Ping Wah; Tsang Wai Wan

2004-08-01T23:59:59.000Z

227

Statistical Tropical Cyclone Wind Radii Prediction Using Climatology and Persistence  

Science Conference Proceedings (OSTI)

An operational model used to predict tropical cyclone wind structure in terms of significant wind radii (i.e., 34-, 50-, and 64-kt wind radii, where 1 kt = 0.52 m s?1) at the National Oceanic and Atmospheric Administration/National Hurricane ...

John A. Knaff; Charles R. Sampson; Mark DeMaria; Timothy P. Marchok; James M. Gross; Colin J. McAdie

2007-08-01T23:59:59.000Z

228

A QuikSCAT climatology of tropical cyclone size  

E-Print Network (OSTI)

QuikSCAT data of near-surface wind vectors for the years 1999–2008 are used to create a climatology of tropical cyclone (TC) size, defined as the radius of vanishing winds. The azimuthally-averaged radius of 12 ms?1 [ms ...

Chavas, Daniel Robert

229

On the Decay of Tropical Cyclone Winds Crossing Narrow Landmasses  

Science Conference Proceedings (OSTI)

A method is developed to adjust the Kaplan and DeMaria tropical cyclone inland wind decay model for storms that move over narrow landmasses. The basic assumption that the wind speed decay rate after landfall is proportional to the wind speed is ...

Mark DeMaria; John A. Knaff; John Kaplan

2006-03-01T23:59:59.000Z

230

A Simulation Study of the Landfall of Tropical Cyclones  

Science Conference Proceedings (OSTI)

By use of a triply nested, movable mesh model, several ideal simulations OF tropical Cyclone landfall were performed for a strong zonal flow of 10 m s-1. The integration domain was a 37 × 45° channel with the innermost mesh having a 22 × 22 ...

Robert E. Tuleya; Morris A. Bender; Yoshio Kurihara

1984-01-01T23:59:59.000Z

231

Tropical Cyclone– and Monsoon-Induced Rainfall Variability in Taiwan  

Science Conference Proceedings (OSTI)

This study investigates the interannual variability of tropical cyclone (TC)- and monsoon-induced rainfall (P) in Taiwan during July–September for the period 1950–2002. To examine the relative effects of TCs and monsoons, local rainfall in Taiwan ...

Jau-Ming Chen; Tim Li; Ching-Feng Shih

2010-08-01T23:59:59.000Z

232

Self-Adapting Analog Ensemble Predictions of Tropical Cyclone Tracks  

Science Conference Proceedings (OSTI)

An analog model is used to predict the tropical cyclone tracks in the Atlantic and east Pacific basins. The model is self-adapting in its search of ensembles of optimal historic analogs by creating a norm that minimizes the forecast error ...

Oliver Sievers; Klaus Fraedrich; Christoph C. Raible

2000-10-01T23:59:59.000Z

233

Upper Oceanic Energy Response to Tropical Cyclone Passage  

Science Conference Proceedings (OSTI)

The upper oceanic temporal response to tropical cyclone (TC) passage is investigated using a 6-yr daily record of data-driven analyses of two measures of upper ocean energy content based on the U.S. Navy’s Coupled Ocean Data Assimilation System ...

John A. Knaff; Mark DeMaria; Charles R. Sampson; James E. Peak; James Cummings; Wayne H. Schubert

2013-04-01T23:59:59.000Z

234

A New Method for Estimating Tropical Cyclone Wind Speed Probabilities  

Science Conference Proceedings (OSTI)

The National Hurricane Center (NHC) Hurricane Probability Program (HPP) was implemented in 1983 to estimate the probability that the center of a tropical cyclone would pass within 60 n mi of a set of specified points out to 72 h. Other than ...

Mark DeMaria; John A. Knaff; Richard Knabb; Chris Lauer; Charles R. Sampson; Robert T. DeMaria

2009-12-01T23:59:59.000Z

235

Effect of Beta Shear on Simulated Tropical Cyclones  

Science Conference Proceedings (OSTI)

Through cloud-resolving simulations, this study examines the effect of ? on the evolution of tropical cyclones (TCs). It is found that the TC simulated on a ? plane with variable Coriolis parameter f is weaker in intensity but larger in size and ...

Juan Fang; Fuqing Zhang

2012-10-01T23:59:59.000Z

236

Links between Tropical Cyclone Activity and Madden–Julian Oscillation Phase in the North Atlantic and Northeast Pacific Basins  

Science Conference Proceedings (OSTI)

The leading intraseasonal mode of atmospheric and oceanic variability, the Madden–Julian oscillation (MJO), influences tropical and extratropical sea level pressure, temperature, divergent and rotational wind components, moisture, and deep ...

Bradford S. Barrett; Lance M. Leslie

2009-02-01T23:59:59.000Z

237

The Analysis of Tropical Cyclone Tracks in the Western North Pacific through Data Mining. Part I: Tropical Cyclone Recurvature  

Science Conference Proceedings (OSTI)

This paper is the first of a two-part series of papers that employs the data-mining approach to analyze tropical cyclone (TC) movement in the western North Pacific Ocean. Part I unravels conditions under which TCs tend to recurve, and Part II ...

Wei Zhang; Yee Leung; Johnny C. L. Chan

2013-06-01T23:59:59.000Z

238

The Analysis of Tropical Cyclone Tracks in the Western North Pacific through Data Mining. Part II: Tropical Cyclone Landfall  

Science Conference Proceedings (OSTI)

This is the second paper of a two-part series of papers on the analysis of tropical cyclone (TC) tracks in the western North Pacific Ocean. In this paper, TC landfalls in the South China Sea and western North Pacific basins are investigated ...

Wei Zhang; Yee Leung; Johnny C. L. Chan

2013-06-01T23:59:59.000Z

239

Vortex Rossby Waves in a Numerically Simulated Tropical Cyclone. Part II: The Role in Tropical Cyclone Structure and Intensity Changes  

Science Conference Proceedings (OSTI)

In Part I, the author analyzed the asymmetric structure in the inner core of a numerically simulated tropical cyclone and found that the asymmetry near the eyewall in the mid–lower troposphere is dominated by wavenumber-1 and -2 vortex Rossby ...

Yuqing Wang

2002-04-01T23:59:59.000Z

240

Effects of the Upper Flow Asymmetry on the Future Direction of Motion of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Analyses of 200-mb streamlines indicate the existence of a confluence between a tropical cyclone’s main anticyclonic outflow channel aloft and the large-wale environmental upper flow. The confluence produces in the poleward semicircle a ...

F. A. Lajoie

1986-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

A Technique for Detecting a Tropical Cyclone Center Using a Doppler Radar  

Science Conference Proceedings (OSTI)

A ground-based Doppler radar technique is developed for detecting a tropical cyclone center position. Accurate determination of the cyclone center position, based on Doppler velocity measurements, will become essential for the issuance of ...

Vincent T. Wood

1994-10-01T23:59:59.000Z

242

Quantifying Surface Energy Fluxes in the Vicinity of Inland-Tracking Tropical Cyclones  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) typically weaken or transition to extratropical cyclones after making landfall. However, there are cases of TCs maintaining warm-core structures and intensifying inland unexpectedly, referred to as TC maintenance or ...

Theresa K. Andersen; David E. Radcliffe; J. Marshall Shepherd

243

Propagation of a Tropical Cyclone in a Meridionally Varying Zonal Flow: An Energetics Analysis  

Science Conference Proceedings (OSTI)

Tropical cyclone propagation (the beta drift) is driven by a secondary circulation associated with axially asymmetric gyres (beta gyres) in the vicinity of the cyclone center. In the presence of the beta effect, the environmental flow may ...

Bin Wang; Xiaofan Li

1995-05-01T23:59:59.000Z

244

Observation-Based Estimates of Surface Cooling Inhibition by Heavy Rainfall under Tropical Cyclones  

Science Conference Proceedings (OSTI)

Tropical cyclones drive intense ocean vertical mixing that explains most of the surface cooling observed in their wake (the “cold wake”). In this paper, the authors investigate the influence of cyclonic rainfall on the cold wake at a global scale ...

Nicolas C. Jourdain; Matthieu Lengaigne; Jérome Vialard; Gurvan Madec; Christophe E. Menkes; Emmanuel M. Vincent; Swen Jullien; Bernard Barnier

2013-01-01T23:59:59.000Z

245

A Bayesian Regression Approach to Seasonal Prediction of Tropical Cyclones Affecting the Fiji Region  

Science Conference Proceedings (OSTI)

This study presents seasonal prediction schemes for tropical cyclones (TCs) affecting the Fiji, Samoa, and Tonga (FST) region. Two separate Bayesian regression models are developed: (i) for cyclones forming within the FST region (FORM) and (ii) ...

Savin S. Chand; Kevin J. E. Walsh; Johnny C. L. Chan

2010-07-01T23:59:59.000Z

246

A field theoretical prediction of the tropical cyclone properties  

E-Print Network (OSTI)

The large scale atmospheric vortices (tropical cyclones, tornadoes) are complex physical systems combining thermodynamics and fluid-mechanical processes. The late phase of the evolution towards stationarity consists of the vorticity concentration, a well known tendency to self-organization, an universal property of the two-dimensional fluids. It may then be expected that the stationary state of the tropical cyclone has the same nature as the vortices of many other systems in nature: ideal (Euler) fluids, superconductors, Bose - Einsetin condensate, cosmic strings, etc. Indeed it was found that there is a description of the atmospheric vortex in terms of a field theory. It is compatible with the more conventional treatment based on conservation laws, but the field theoretical model reveals properties that are almost inaccessible to the conventional formulation: it identifies the stationary states as being close to self-duality. This is of highest importance: the self-duality is known to be the origin of all co...

Spineanu, Florin

2013-01-01T23:59:59.000Z

247

The Impact of Tropical Cyclones on Gulf of Mexico Crude Oil and ...  

U.S. Energy Information Administration (EIA)

wind speeds. Tropical depressions are cyclones having a maximum sustained wind ... Federally-administered offshore oil and natural gas production occurs on the OCS,

248

1080 MONTHLY WEATHER REVIEW VOLUME 126 NOTES AND CORRESPONDENCE Interannual Variation in the Tropical Cyclone Formation over the Western North Pacific  

E-Print Network (OSTI)

The interannual variation in tropical cyclone genesis frequency over the western North Pacific was examined for the active tropical cyclone (including summer and fall) during 1979–94. An emphasis was put on the possible effect of the interannual variation of atmospheric circulation and monsoon trough on tropical cyclone occurrence. The major findings of this study are the following. 1) A distinct increase (decrease) of tropical cyclone genesis frequency occurs north of the climatological location of the monsoon trough in the Philippine Sea during summers (June–August) with anomalous cold (warm) sea surface temperature (SST) over the NINO3 region. The interannual variation of tropical cyclone genesis in this region results from the appearance of an anomalous cyclonic (anticyclonic) cell situated in a summer teleconnection wave train emanating from the western tropical Pacific and progressing along the rim of the North Pacific. In addition to the north–south interannual variation, there is also a longitudinal interannual variation in the summer tropical cyclone genesis frequency over this region. The contrast of tropical cyclone genesis between the regions west and east of 150?E is reduced (enhanced) when the monsoon trough extends (retreats) eastward (westward) across this longitude during warm (cold) summers. 2) For fall (September–November), there is no clear relationship between the north–south interannual variation in the tropical cyclone genesis over the western North Pacific and SST (NINO3). However, there is a perceptible tendency of the longitudinal interannual variation in tropical cyclone genesis frequency to follow the eastward extension/westward retreat of the monsoon trough in a way such as it does during the summer season. 1.

Tsing-chang Chen; Shu-ping Weng; Susan Kiehne

1996-01-01T23:59:59.000Z

249

A Technique for Estimating Recurrence Intervals of Tropical Cyclone-Related High Winds in the Tropics: Results for Guam  

Science Conference Proceedings (OSTI)

The authors develop a technique that applies models of the radial profile of the wind in tropical cyclones to historical best-track databases of tropical cyclones, in order to estimate the wind (at 1-h intervals) experienced at any selected ...

John A. Rupp; Mark A. Lander

1996-05-01T23:59:59.000Z

250

The Impact of Outflow Environment on Tropical Cyclone Intensification and Structure  

Science Conference Proceedings (OSTI)

In this study, the impacts of regions of weak inertial stability on tropical cyclone intensification and peak strength are examined. It is demonstrated that weak inertial stability in the outflow layer minimizes an energy sink of the tropical ...

Eric D. Rappin; Michael C. Morgan; Gregory J. Tripoli

2011-02-01T23:59:59.000Z

251

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

252

Tropical Cyclone–Induced Upper-Ocean Mixing and Climate: Application to Equable Climates  

Science Conference Proceedings (OSTI)

Tropical cyclones instigate an isolated blast of vigorous mixing in the upper tropical oceans, stirring warm surface water with cooler water in the thermocline. Previous work suggests that the frequency, intensity, and lifetime of these storms ...

Robert L. Korty; Kerry A. Emanuel; Jeffery R. Scott

2008-02-01T23:59:59.000Z

253

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

254

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

255

Vertical Structure of Tropical Cyclone Rainbands as Seen by the TRMM Precipitation Radar  

Science Conference Proceedings (OSTI)

Ten years of data from the Tropical Rainfall Measurement Mission satellite’s Precipitation Radar (TRMM PR) show the vertical structure of tropical cyclone rainbands. Radar-echo statistics show that rainbands have a two-layered structure, with ...

Deanna A. Hence; Robert A. Houze Jr.

2012-09-01T23:59:59.000Z

256

Self-Stratification of Tropical Cyclone Outflow. Part II: Implications for Storm Intensification  

E-Print Network (OSTI)

Tropical cyclones intensify and are maintained by surface enthalpy fluxes that result from the thermodynamics disequilibrium that exists between the tropical oceans and atmosphere. While this general result has been known ...

Emanuel, Kerry Andrew

257

A TRMM-Based Tropical Cyclone Cloud and Precipitation Feature Database  

Science Conference Proceedings (OSTI)

The Tropical Rainfall Measuring Mission (TRMM) satellite has provided invaluable data for tropical cyclone (TC) research since December 1997. The challenge, however, is how to analyze and efficiently utilize all of the information from several ...

Haiyan Jiang; Chuntao Liu; Edward J. Zipser

2011-06-01T23:59:59.000Z

258

Vertical Structure of Tropical Cyclones with Concentric Eyewalls as Seen by the TRMM Precipitation Radar  

Science Conference Proceedings (OSTI)

Ten years of data from the Tropical Rainfall Measurement Mission satellite’s Precipitation Radar are analyzed to determine the typical vertical structure of the concentric eyewalls of tropical cyclones undergoing eyewall replacement. The vertical ...

Deanna A. Hence; Robert A. Houze Jr.

2012-03-01T23:59:59.000Z

259

Verification of Tropical Cyclone–Related Satellite Precipitation Estimates in Mainland China  

Science Conference Proceedings (OSTI)

To evaluate the abilities of satellite retrievals in reflecting precipitation features related to tropical cyclones (TCs) affecting mainland China, four years of 6- and 24-h precipitation retrievals from three datasets, namely the Tropical ...

Zifeng Yu; Hui Yu; Peiyan Chen; Chuanhai Qian; Caijun Yue

2009-11-01T23:59:59.000Z

260

Developing versus Nondeveloping Disturbances for Tropical Cyclone Formation. Part I: North Atlantic  

Science Conference Proceedings (OSTI)

This study investigates the characteristic differences of tropical disturbances that eventually develop into tropical cyclones (TCs) versus those that did not, using global daily analysis fields of the Navy Operational Global Atmospheric ...

Melinda S. Peng; Bing Fu; Tim Li; Duane E. Stevens

2012-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Beta Test of the Systematic Approach Expert System Prototype as a Tropical Cyclone Track Forecasting Aid  

Science Conference Proceedings (OSTI)

The authors have developed error mechanism conceptual models with characteristic track departures and anomalous wind or sea level pressure patterns for dynamical tropical cyclone track predictions primarily occurring in tropical regions or those ...

Lester E. Carr III; Russell L. Elsberry; James E. Peak

2001-06-01T23:59:59.000Z

262

Vertical Wind Shear Influences on Tropical Cyclone Formation and Intensification during TCM-92 and TCM-93  

Science Conference Proceedings (OSTI)

Vertical wind shears between 200 and 850 mb are calculated from operational analyses and special interactive analyses for Tropical Storm Steve during the Tropical Cyclone Motion (TCM-93) field experiment and for Typhoon Omar at the end of the TCM-...

Russell L. Elsberry; Richard A. Jeffries

1996-07-01T23:59:59.000Z

263

Sensitivity of Tropical Cyclones to Surface Exchange Coefficients and a Revised Steady-State Model incorporating Eye Dynamics  

Science Conference Proceedings (OSTI)

Numerical and theoretical models of tropical cyclones indicate that the maximum wind speed in mature storms is sensitive to the ratio of the enthalpy and momentum surface exchange coefficients and that the spinup time of tropical cyclones varies ...

Kerry A. Emanuel

1995-11-01T23:59:59.000Z

264

Prediction and Diagnosis of Tropical Cyclone Formation in an NWP System. Part III: Diagnosis of Developing and Nondeveloping Storms  

Science Conference Proceedings (OSTI)

This is the third 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; N. E. Davidson; M. T. Montgomery

2007-09-01T23:59:59.000Z

265

The South Pacific and southeast Indian Ocean tropical cyclone season 2003-04  

E-Print Network (OSTI)

Twelve tropical cyclones (TCs) formed in the combined southeast Indian Ocean and South Pacific Ocean basins, all of which formed between December and March. This was well below the long-term average of 18.9 and becomes the fifth consecutive year of below average occurrences of TCs over this region. However, of the 20 TCs to occur in the southern hemisphere as a whole, eight of those became intense tropical cyclones (ITC), resulting in an above average number of ITCs and ITC days in the southern hemisphere. The El Niño Southern – Oscillation (ENSO) should not have been a modulating influence, in this ENSO-neutral season. The majority of TCs coincided with active phases of the Madden-Julian Oscillation (MJO).

R. Mcinerney; J. Farlow; E. Henry; B. Lynch; I. Shepherd; T. Smith

2006-01-01T23:59:59.000Z

266

A Technique to Determine the Radius of Maximum Wind of a Tropical Cyclone  

Science Conference Proceedings (OSTI)

A simple technique is developed that enables the radius of maximum wind of a tropical cyclone to be estimated from satellite cloud data. It is based on the characteristic cloud and wind structure of the eyewall of a tropical cyclone, after the ...

France Lajoie; Kevin Walsh

2008-10-01T23:59:59.000Z

267

Statistical modelling of tropical cyclone genesis: a non-parametric model for the annual distribution  

E-Print Network (OSTI)

As part of a project to develop more accurate estimates of the risks due to tropical cyclones, we describe a non-parametric method for the statistical simulation of the location of tropical cyclone genesis. The method avoids the use of arbitrary grid boxes, and the spatial smoothing of the historical data is constructed optimally according to a clearly defined merit function.

Hall, T; Hall, Tim; Jewson, Stephen

2005-01-01T23:59:59.000Z

268

Statistical modelling of tropical cyclone genesis: a non-parametric model for the annual distribution  

E-Print Network (OSTI)

As part of a project to develop more accurate estimates of the risks due to tropical cyclones, we describe a non-parametric method for the statistical simulation of the location of tropical cyclone genesis. The method avoids the use of arbitrary grid boxes, and the spatial smoothing of the historical data is constructed optimally according to a clearly defined merit function. 1

Tim Hall; Stephen Jewson

2008-01-01T23:59:59.000Z

269

Kernel Density Estimation Applied to Tropical Cyclones Genesis in Northwestern Pacific  

Science Conference Proceedings (OSTI)

It is recognized that although the conditions necessary for generating cyclones are actually present in the tropical latitudes for much of the year, the storms themselves are comparatively rare. In addition, the skill of forecasting the occurrence of ... Keywords: genesis, kernel density estimation, tropical cyclone

Zhao Haikun; Wu Liguang; Zhou Weican

2009-07-01T23:59:59.000Z

270

Performance of the Nested Tropical Cyclone Model as a Function of Five Storm-Related Parameters  

Science Conference Proceedings (OSTI)

A detailed analysis of the performance of the U.S. Navy Nested Tropical Cyclone Model (NTCM) for western North Pacific tropical cyclones is made based on five storm-related factors: latitude, longitude, intensity, 12-h intensity change and size (...

Johnny C-L. Chan; Brian J. Williams; Russell L. Elsberry

1987-07-01T23:59:59.000Z

271

An Automated Method to Estimate Tropical Cyclone Intensity Using SSM/I Imagery  

Science Conference Proceedings (OSTI)

An automated method to estimate tropical cyclone intensity using Special Sensor Microwave Imager (SSM/I) data is developed and tested. SSM/I images (512 km × 512 km) centered on a given tropical cyclone (TC), with a known best-track intensity, ...

Richard L. Bankert; Paul M. Tag

2002-05-01T23:59:59.000Z

272

Some Implications of Core Regime Wind Structures in Western North Pacific Tropical Cyclones  

Science Conference Proceedings (OSTI)

In this study, a tropical cyclone (TC) is considered to be compact if 1) the radius of maximum wind or the maximum tangential wind is smaller than what would be expected for an average tropical cyclone of the same intensity or the same radius of ...

Delia Yen-Chu Chen; Kevin K. W. Cheung; Cheng-Shang Lee

2011-02-01T23:59:59.000Z

273

A Diagnostic Study of the Intensity of Three Tropical Cyclones in the Australian Region. Part I: A Synopsis of Observed Features of Tropical Cyclone Kathy (1984)  

Science Conference Proceedings (OSTI)

Objective streamline analyses and digitized high-resolution IR satellite cloud data have been used to examine in detail the changes in the environmental circulation and in the cloud structure that took place in and around Tropical Cyclone Kathy (...

France Lajoie; Kevin Walsh

2010-01-01T23:59:59.000Z

274

RSS Feeds for Specific Tropical Cyclones of the North Atlantic, Caribbean  

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

RSS Feeds for Specific Tropical Cyclones of the North Atlantic, Caribbean RSS Feeds for Specific Tropical Cyclones of the North Atlantic, Caribbean Sea, and Gulf of Mexico (English) Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data RSS Feeds for Specific Tropical Cyclones of the North Atlantic, Caribbean Sea, and Gulf of Mexico (English) Dataset Summary Description The National Weather Service (NWS) National Hurricane Center uses regularly updated RSS feeds to disseminate North Atlantic, Caribbean Sea, and Gulf of Mexcio tropical cyclone and marine forecasts. Tags {hurricanes,"tropical cyclones",warning,watch," forecast",discussion,outlooks,"",marine,temperature," Atlantic","Caribbean Sea","Gulf of Mexico. "}

275

Power Outages Update: Post-Tropical Cyclone Sandy | Department of Energy  

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

Outages Update: Post-Tropical Cyclone Sandy Outages Update: Post-Tropical Cyclone Sandy Power Outages Update: Post-Tropical Cyclone Sandy October 29, 2012 - 9:37pm Addthis Sandy made landfall as a post-tropical cyclone on the southern coast of New Jersey near Atlantic City at 8 p.m. with top sustained winds of 80 mph. | Photo courtesy of NOAA Sandy made landfall as a post-tropical cyclone on the southern coast of New Jersey near Atlantic City at 8 p.m. with top sustained winds of 80 mph. | Photo courtesy of NOAA Dan Leistikow Dan Leistikow Former Director, Office of Public Affairs As of 8:00 pm EDT on October 29, there were more than 3.6 million customers without power in the affected states. The Energy Department is continuing to monitor the progress of the storm throughout the night and will publish

276

Eastern North Pacific Tropical Cyclones of 1983  

Science Conference Proceedings (OSTI)

A summary of the 1983 season is presented. Included are seasonal statistics, storm tracks and comparisons with activity in recent years.

E. B. Gunther; R. L. Cross

1984-07-01T23:59:59.000Z

277

Eastern North Pacific Tropical Cyclones of 1984  

Science Conference Proceedings (OSTI)

A summary of the 1984 season is presented. Included are season statistics, storm tracks and comparisons with activity in recent years.

E. B. Gunther; R. L. Cross

1985-08-01T23:59:59.000Z

278

Eastern North Pacific Tropical Cyclones of 1981  

Science Conference Proceedings (OSTI)

A summary of the 1981 season is presented. Included are seasonal statistics, storm tracks and comparisons with activity in recent years.

Emil B. Gunther

1982-07-01T23:59:59.000Z

279

Eastern North Pacific Tropical Cyclones of 1980  

Science Conference Proceedings (OSTI)

A summary of the 1980 season is presented. Included are seasonal statistics, storm tracks and comparisons with activity in recent years.

Emil B. Gunther

1981-08-01T23:59:59.000Z

280

Eastern North Pacific Tropical Cyclones of 1979  

Science Conference Proceedings (OSTI)

A summary of the 1979 season is presented. Included are seasonal statistics, storm tracks and comparisons with activity in recent years.

Emil B. Gunther

1980-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Tropical cyclone Tracy – numerical guidance then and now  

E-Print Network (OSTI)

The passing of over three decades since tropical cyclone Tracy devastated Darwin on Christmas Day 1974 provided a reason to reflect upon the progress of numerical weather prediction over that period. Each decade was characterised by major model changes. In Australia, the 1970s saw the operational implementation of a 7-level baroclinic filtered model at a grid spacing of 254 km, with rudimentary representation of physical processes. The 1980s witnessed the operational introduction of a 12-level primitive equations model with a grid spacing of 150 km and enhanced representation of both the data assimilation approach and the model physics. Finally, in the 1990s the modeling capacity had reached the point where a 40-level model with a grid spacing of 5 km, such as the one employed here, could be run in near real-time, nested over the area of interest. Some research versions also had became available at even higher resolutions. Further improvements in the representation of physical processes and advanced data assimilation procedures, such as 4D-Var, were also available. Here, three models similar to those cited above were run out to 48 hours for the tropical cyclone Tracy case. In all models a bogussed vortex was required to provide

John F. Le Marshall; Lance M. Leslie

2009-01-01T23:59:59.000Z

282

Response of tropical cyclones to idealized climate change experiments in a global high resolution coupled general circulation model  

Science Conference Proceedings (OSTI)

We present an assessment of how tropical cyclone activity might change due to the influence of increased atmospheric carbon dioxide concentrations, using the UK’s High Resolution Global Environment Model (HiGEM) with N144 resolution (~90 km in the ...

Ray Bell; Jane Strachan; Pier Luigi Vidale; Kevin Hodges; Malcolm Roberts

283

Future Change of North Atlantic Tropical Cyclone Tracks: Projection by a 20-km-Mesh Global Atmospheric Model  

Science Conference Proceedings (OSTI)

Possible future change in tropical cyclone (TC) activity over the North Atlantic (NA) was investigated by comparison of 25-yr simulations of the present-day climate and future change under the A1B emission scenario using a 20-km-mesh ...

Hiroyuki Murakami; Bin Wang

2010-05-01T23:59:59.000Z

284

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

285

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

286

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

287

A Diagnostic Study of the Extratropical Precipitation Resulting from Tropical Cyclone Bola  

Science Conference Proceedings (OSTI)

This is the second of two papers on tropical storms entering middle latitudes in the southwest Pacific. This study focuses on the heavy rainfall associated with Tropical Cyclone Bola during 6–8 March 1988 following its passage from the tropics to ...

Mark R. Sinclair

1993-10-01T23:59:59.000Z

288

The South Pacific and southeast Indian Ocean tropical cyclone season 1998-99  

E-Print Network (OSTI)

Twenty tropical cyclones formed in the South Pacific and southeast Indian Ocean region during the 1998- 99 season. An uncharacteristic early start to the season saw the development of cyclone Zelia in early October followed by Alison in early November. But the season was most noted for the development

Sue Oates

2000-01-01T23:59:59.000Z

289

Analog Ensemble Forecasts of Tropical Cyclone Tracks in the Australian Region  

Science Conference Proceedings (OSTI)

Tropical cyclone tracks in the Australian basin are predicted by an analog ensemble forecast model. It is self-adapting in its search of optimal ensemble members from historic cyclone tracks by creating a metric that minimizes the error of the ...

Klaus Fraedrich; Christoph C. Raible; Frank Sielmann

2003-02-01T23:59:59.000Z

290

The Development and Assessment of a Model-, Grid-, and Basin-Independent Tropical Cyclone Detection Scheme  

Science Conference Proceedings (OSTI)

A novel approach to tropical cyclone (TC) detection in coarse-resolution numerical model data is introduced and assessed. This approach differs from traditional detectors in two main ways. First, it was developed and tuned using 20 yr of ECMWF ...

K. J. Tory; S. S. Chand; R. A. Dare; J. L. McBride

2013-08-01T23:59:59.000Z

291

An Objective Method for Forecasting Tropical Cyclone Intensity Using Nimbus-5 Electrically Scanning Microwave Radiometer Measurements  

Science Conference Proceedings (OSTI)

An empirical analysis program, based on finding an optimal representation of the data, has been applied to 120 observations of twenty nine 1973 and 1974 North Pacific tropical cyclones. Each observation consists of a field of Nimbus-5 ...

Herbert E. Hunter; Edward B. Rodgers; William E. Shenk

1981-02-01T23:59:59.000Z

292

A Comparison of the Performance of Two Operational Dynamic Tropical Cyclone Models  

Science Conference Proceedings (OSTI)

This paper compares the performance of two multi-level high-resolution baroclinic tropical cyclone models which are currently in operational use. In the Atlantic, the National Hurricane Center utilizes the Movable Fine-mesh Model (MFM) for ...

Michael Fiorino; Edward J. Harrison Jr.; Donald G. Marks

1982-07-01T23:59:59.000Z

293

Relating the Skill of Tropical Cyclone Intensity Forecasts to the Synoptic Environment  

Science Conference Proceedings (OSTI)

Prior knowledge of the performance of a tropical cyclone intensity forecast holds the potential to increase the value of forecasts for end users. The values of certain dynamical parameters, such as storm speed, latitude, current intensity, ...

Kieran T. Bhatia; David S. Nolan

2013-08-01T23:59:59.000Z

294

The Influence of Atlantic Tropical Cyclones on Drought over the Eastern United States (1980–2007)  

Science Conference Proceedings (OSTI)

To assess the influence of Atlantic tropical cyclones (TCs) on the eastern U.S. drought regime, the Variable Infiltration Capacity (VIC) land surface hydrologic model was run over the eastern United States forced by the North American Land Data ...

Jonghun Kam; Justin Sheffield; Xing Yuan; Eric F. Wood

2013-05-01T23:59:59.000Z

295

Precipitation Distribution Associated with Landfalling Tropical Cyclones over the Eastern United States  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) making landfall over the United States are examined by separating those associated with precipitation predominantly left of their tracks from those with the same to the right of their tracks. Composites of atmospheric ...

Eyad Atallah; Lance F. Bosart; Anantha R. Aiyyer

2007-06-01T23:59:59.000Z

296

An Analysis of Atlantic Tropical Cyclone Forecast Errors, 1970–1979  

Science Conference Proceedings (OSTI)

Official Atlantic tropical cyclone track forecasts issued by the National Hurricane Center over the decade of the 1970's are examined in this study. The purpose is to isolate any significant biases, trends or other statistical properties of the ...

Charles S. Neumann; Joseph M. Pelissier

1981-06-01T23:59:59.000Z

297

Interactions between Simulated Tropical Cyclones and an Environment with a Variable Coriolis Parameter  

Science Conference Proceedings (OSTI)

Numerical simulations of tropical cyclones are performed to examine the effects of a variable Coriolis parameter on the structure and intensity of hurricanes. The simulations are performed using the nonhydrostatic fifth-generation Pennsylvania ...

Elizabeth A. Ritchie; William M. Frank

2007-05-01T23:59:59.000Z

298

Environmental Factors Contributing to Tropical Cyclone Genesis over the Western North Pacific  

Science Conference Proceedings (OSTI)

The flow environment associated with tropical cyclone genesis (TCG) over the western North Pacific was assessed via categorization into five flow patterns: monsoon shear line (SL), monsoon confluence region (CR), monsoon gyre (GY), easterly wave (...

Ryuji Yoshida; Hirohiko Ishikawa

2013-02-01T23:59:59.000Z

299

The Interannual Variability in the Genesis Location of Tropical Cyclones in the Northwest Pacific  

Science Conference Proceedings (OSTI)

Variations in the seasonal mean (July–October) genesis positions of tropical cyclones (TCs) in the western North Pacific associated with variations in the large-scale atmospheric circulation are investigated. Analysis shows considerable ...

Hsin Hsing Chia; C. F. Ropelewski

2002-10-01T23:59:59.000Z

300

Assimilation of Synthetic Tropical Cyclone Observations into the Navy Operational Global Atmospheric Prediction System  

Science Conference Proceedings (OSTI)

In June 1990, the assimilation of synthetic tropical cyclone observations into the Navy Operational Global Atmospheric Prediction System (NOGAPS) was initiated at Fleet Numerical Oceanography Center (FNOC). These observations are derived directly ...

James S. Goerss; Richard A. Jeffries

1994-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Tropical Cyclone Intensity Increase near Australia as a Result of Climate Change  

Science Conference Proceedings (OSTI)

Idealized tropical cyclones are inserted into a regional climate model and the resulting intensity evolution of the storms is examined under current and enhanced greenhouse climates. The regional climate model is implemented over a model domain ...

Kevin J. E. Walsh; Brian F. Ryan

2000-08-01T23:59:59.000Z

302

An Examination of the Pressure–Wind Relationship for Intense Tropical Cyclones  

Science Conference Proceedings (OSTI)

In this study, the dynamical constraints underlining the pressure–wind relationship (PWR) for intense tropical cyclones (TCs) are examined with the particular focus on the physical connections between the maximum surface wind (VMAX) and the ...

Chanh Q. Kieu; Hua Chen; Da-Lin Zhang

2010-06-01T23:59:59.000Z

303

Quantifying Interagency Differences in Tropical Cyclone Best-Track Wind Speed Estimates  

Science Conference Proceedings (OSTI)

Numerous agencies around the world perform postseason analysis of tropical cyclone position and intensity, a process described as “best tracking.” However, this process is temporally and spatially inhomogeneous because data availability, ...

Kenneth R. Knapp; Michael C. Kruk

2010-04-01T23:59:59.000Z

304

An Automated, Objective, Multiple-Satellite-Platform Tropical Cyclone Surface Wind Analysis  

Science Conference Proceedings (OSTI)

A method to estimate objectively the surface wind fields associated with tropical cyclones using only data from multiple satellite platforms and satellite-based wind retrieval techniques is described. The analyses are computed on a polar grid ...

John A. Knaff; Mark DeMaria; Debra A. Molenar; Charles R. Sampson; Matthew G. Seybold

2011-10-01T23:59:59.000Z

305

Trend Analysis with a New Global Record of Tropical Cyclone Intensity  

Science Conference Proceedings (OSTI)

The historical global “best-track” records of tropical cyclones extend back to the mid-19th century in some regions, but formal analysis of these records is encumbered by temporal heterogeneities in the data. This is particularly problematic when ...

James P. Kossin; Timothy L. Olander; Kenneth R. Knapp

306

Tropical Cyclone-like Vortices in a Limited Area Model: Comparison with Observed Climatology  

Science Conference Proceedings (OSTI)

A climate simulation of a limited area model implemented over the Australian region is analyzed for the presence of low pressure systems that have some of the physical characteristics of tropical cyclones. The model is run at a horizontal ...

Kevin Walsh; Ian G. Watterson

1997-09-01T23:59:59.000Z

307

Influence of Synoptic Track Aircraft Reconnaissance on JTWC Tropical Cyclone Track Forecast Errors  

Science Conference Proceedings (OSTI)

This report examines the impact of synoptic reconnaissance by United States Air Force aircraft on the accuracy of tropical cyclone motion forecasts. Synoptic reconnaissance missions were requested for the purpose of collecting data on atmospheric ...

Daniel N. Shoemaker; William M. Gray; John D. Sheaffer

1990-09-01T23:59:59.000Z

308

A Satellite Observational Study of Precipitation Characteristics in Western North Pacific Tropical Cyclones  

Science Conference Proceedings (OSTI)

Special Sensor Microwave/Imager (SSM/I) observations were used to examine spatial and temporal changes in the precipitation characteristics for western North Pacific tropical cyclones that reached storm stage or greater during 1987-92. The second ...

Edward B. Rodgers; Harold F. Pierce

1995-12-01T23:59:59.000Z

309

Assessment of the Role of Aircraft Reconnaissance on Tropical Cyclone Analysis and Forecasting  

Science Conference Proceedings (OSTI)

The impact of aircraft reconnaissance on tropical cyclone (TC) observation and forecasting is assessed. The motivation for this assessment is the termination of Department of Defense (DOD) aircraft reconnaissance in the northwest Pacific in 1987 ...

William M. Gray; Charles Neumann; Ted L. Tsui

1991-12-01T23:59:59.000Z

310

Observational Analyses of North Atlantic Tropical Cyclones from NOAA Polar-Orbiting Satellite Microwave Data  

Science Conference Proceedings (OSTI)

Passive microwave observations from the current NOAA series of polar-orbiting satellites of a large sample of North Atlantic tropical cyclones are qualitatively and quantitatively analyzed. Microwave observations can penetrate the cloud cover ...

Christopher S. Velden

1989-01-01T23:59:59.000Z

311

Observational Evidence for Predictions of Tropical Cyclone Propagation Relative to Environmental Steering  

Science Conference Proceedings (OSTI)

Theories of vortex motion due to the variations of the Coriolis parameter and environmental vorticity are compared to observations of tropical cyclone motion relative to computed “steering flows” using previously published composite data. The ...

L. E. Carr III; Russell L. Elsberry

1990-02-01T23:59:59.000Z

312

Environmental Flow Impacts on Tropical Cyclone Structure Diagnosed from Airborne Doppler Radar Composites  

Science Conference Proceedings (OSTI)

Following a recent demonstration of multicase compositing of axisymmetric tropical cyclone (TC) structure derived from airborne Doppler radar measurements, the authors extend the analysis to the asymmetric structure using an unprecedented database ...

Paul D. Reasor; Robert Rogers; Sylvie Lorsolo

2013-09-01T23:59:59.000Z

313

Evaluation of a Wind-Wave System for Ensemble Tropical Cyclone Wave Forecasting. Part I: Winds  

Science Conference Proceedings (OSTI)

A computationally efficient method of producing tropical cyclone (TC) wind analyses is developed and tested, using a hindcast methodology, for 12 Gulf of Mexico storms. The analyses are created by blending synthetic data, generated from a simple ...

Steven M. Lazarus; Samuel T. Wilson; Michael E. Splitt; Gary A. Zarillo

2013-04-01T23:59:59.000Z

314

The tropical cyclone-induced flux of carbon between the ocean and the atmosphere  

E-Print Network (OSTI)

Tropical cyclones are known to cause phytoplankton blooms in regions of the ocean that would otherwise support very little life; it is also known that these storms entrain carbon-rich deep water, which can cause ...

Zimmerman, Neil L

2012-01-01T23:59:59.000Z

315

Evaluation of a Wind-Wave System for Ensemble Tropical Cyclone Wave Forecasting. Part II: Waves  

Science Conference Proceedings (OSTI)

A wind-wave forecast system, designed with the intention of generating unbiased ensemble wave forecasts for extreme wind events, is assessed. Wave hindcasts for 12 tropical cyclones (TCs) are forced using a wind analysis produced from a ...

Steven M. Lazarus; Samuel T. Wilson; Michael E. Splitt; Gary A. Zarillo

2013-04-01T23:59:59.000Z

316

Objectively Determining the Rotational Center of Tropical Cyclones in Passive Microwave Satellite Imagery  

Science Conference Proceedings (OSTI)

Precise center-fixing of tropical cyclones (TCs) is critical for operational forecasting, intensity estimation, and visualization. Current procedures are usually performed with manual input from a human analyst, using multispectral satellite ...

Anthony J. Wimmers; Christopher S. Velden

2010-09-01T23:59:59.000Z

317

Extreme rainfall intensities and long-term rainfall risk from tropical cyclones  

E-Print Network (OSTI)

We develop a methodology for the frequency of extreme rainfall intensities caused by tropical cyclones (TCs) in coastal areas. The mean rainfall field associated with a TC with maximum tangential wind speed Vmax, radius ...

Langousis, Andreas, 1981-

2009-01-01T23:59:59.000Z

318

Multigrid Solution of an Elliptic Boundary Value Problem from Tropical Cyclone Theory  

Science Conference Proceedings (OSTI)

We consider the multigrid solution of the transverse circulation equation for a tropical cyclone. First we develop a standard multigrid scheme (SMG) which cycles between different levels of discretization (grids) to efficiently reduce the error ...

Paul E. Ciesielski; Scott R. Fulton; Wayne H. Schubert

1986-05-01T23:59:59.000Z

319

Spatially Inhomogeneous Trends of Tropical Cyclone Intensity over the Western North Pacific for 1977–2010  

Science Conference Proceedings (OSTI)

The spatial distribution of trends in tropical cyclone (TC) intensity over the western North Pacific Ocean (WNP) during the period 1977–2010 was examined using five TC datasets. The spatial distribution of the TC intensity was expressed by ...

Doo-Sun R. Park; Chang-Hoi Ho; Joo-Hong Kim; Hyeong-Seog Kim

2013-07-01T23:59:59.000Z

320

Polarimetric Radar Observations of the Persistently Asymmetric Structure of Tropical Cyclone Ingrid  

Science Conference Proceedings (OSTI)

Tropical Cyclone Ingrid had a distinctly asymmetric reflectivity structure with an offshore maximum as it passed parallel to and over an extended coastline near a polarimetric weather radar located near Darwin, northern Australia. For the first ...

Peter T. May; J. D. Kepert; T. D. Keenan

2008-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Reduction of Tropical Cyclone Position Errors Using an Optimal Combination of Independent Forecasts  

Science Conference Proceedings (OSTI)

It is shown that an optimal linear combination of independent forecasts of tropical cyclone tracks significantly reduces the mean forecast-position errors. In this study the independent forecasts are provided by a statistical scheme (CLIPER) and ...

Lance M. Leslie; Klaus Fraedrich

1990-03-01T23:59:59.000Z

322

A Theory for Mixed Vortex Rossby–Gravity Waves in Tropical Cyclones  

Science Conference Proceedings (OSTI)

Vortex–Rossby waves (VRWs) and inertial gravity waves (IGWs) have been proposed to explain the propagation of spiral rainbands and the development of dynamical instability in tropical cyclones (TCs). In this study, a theory for mixed vortex–...

Wei Zhong; Da-Lin Zhang; Han-Cheng Lu

2009-11-01T23:59:59.000Z

323

Numerical Simulations and Observations of Surface Wave Fields under an Extreme Tropical Cyclone  

Science Conference Proceedings (OSTI)

The performance of the wave model WAVEWATCH III under a very strong, category 5, tropical cyclone wind forcing is investigated with different drag coefficient parameterizations and ocean current inputs. The model results are compared with field ...

Yalin Fan; Isaac Ginis; Tetsu Hara; C. Wayne Wright; Edward J. Walsh

2009-09-01T23:59:59.000Z

324

The Mechanical Energy Input to the Ocean Induced by Tropical Cyclones  

Science Conference Proceedings (OSTI)

Wind stress and tidal dissipation are the most important sources of mechanical energy for maintaining the oceanic general circulation. The contribution of mechanical energy due to tropical cyclones can be a vitally important factor in regulating ...

Ling Ling Liu; Wei Wang; Rui Xin Huang

2008-06-01T23:59:59.000Z

325

Initial Results From The Navy Two-Way Interactive Nested Tropical Cyclone Model  

Science Conference Proceedings (OSTI)

A primitive equation, two-way interactive nested tropical cyclone model has been developed by the Naval Environmental Prediction Research Facility for operational use during the 1980 typhoon season. The fine mesh grid of the model operates ...

Edward J. Harrison Jr.

1981-01-01T23:59:59.000Z

326

Storm-Relative Observations in Tropical Cyclone Data Assimilation with an Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

A storm-relative data assimilation method for tropical cyclones is introduced for the ensemble Kalman filter, using the Hurricane Weather Research and Forecasting (HWRF) Ensemble Data Assimilation System (HEDAS) developed at the Hurricane Research ...

Altu? Aksoy

2013-02-01T23:59:59.000Z

327

The Maximum Intensity of Tropical Cyclones in Axisymmetric Numerical Model Simulations  

Science Conference Proceedings (OSTI)

An axisymmetric numerical model is used to evaluate the maximum possible intensity of tropical cyclones. As compared with traditionally formulated nonhydrostatic models, this new model has improved mass and energy conservation in saturated ...

George H. Bryan; Richard Rotunno

2009-06-01T23:59:59.000Z

328

Impacts of Air–Sea Flux Parameterizations on the Intensity and Structure of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Fluxes of momentum and moist enthalpy across the air–sea interface are believed to be one of the most important factors in determining tropical cyclone intensity. Because these surface fluxes cannot be directly resolved by numerical weather ...

Benjamin W. Green; Fuqing Zhang

2013-07-01T23:59:59.000Z

329

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

330

A Vortex-Based Perspective of Eastern Pacific Tropical Cyclone Formation  

Science Conference Proceedings (OSTI)

Tropical cyclone formation over the eastern Pacific during 2005 and 2006 was examined using primarily global operational analyses from the National Centers for Environmental Prediction. This paper represents a “vortex view” of genesis, adding to ...

Christopher Davis; Chris Snyder; Anthony C. Didlake Jr.

2008-07-01T23:59:59.000Z

331

Influence of model biases on projected future changes in tropical cyclone frequency of occurrence  

Science Conference Proceedings (OSTI)

The influence of model biases on projected future changes in the frequency of occurrence of tropical cyclones (FOCs) was investigated using a new empirical statistical method. Assessments were made of present-day (1979–2003) simulations and future ...

Hiroyuki Murakami; Pang-Chi Hsu; Osamu Arakawa; Tim Li

332

Observations of Record Cold Cloud-Top Temperatures in Tropical Cyclone Hilda (1990)  

Science Conference Proceedings (OSTI)

A detailed analysis is made of the development of a region of cold cloud-top temperatures in Tropical Cyclone Hilda (1990) in the Coral Sea off eastern Australia. Observed temperatures of approximately 173 K (?100°C) from two independent ...

Elizabeth E. Ebert; Greg J. Holland

1992-10-01T23:59:59.000Z

333

A History of Western North Pacific Tropical Cyclone Track Forecast Skill  

Science Conference Proceedings (OSTI)

The tropical cyclone (TC) track forecasting skill of operational numerical weather prediction (NWP) models and their consensus is examined for the western North Pacific from 1992 to 2002. The TC track forecasting skill of the operational NWP ...

James S. Goerss; Charles R. Sampson; James M. Gross

2004-06-01T23:59:59.000Z

334

Gulf Stream and ENSO Increase the Temperature Sensitivity of Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Controversy exists over the role of the recent rise in sea surface temperatures (SST) and the frequency of tropical cyclones or hurricanes. Here, 135 yr of observational records are used to demonstrate how sea surface temperature, sea level ...

J. C. Moore; A. Grinsted; S. Jevrejeva

2008-04-01T23:59:59.000Z

335

Tropical Cyclone Prediction Using a Barotropic Model Initialized by a Generalized Inverse Method  

Science Conference Proceedings (OSTI)

A nested, nondivergent barotropic numerical weather prediction model for forecasting tropical cyclone motion out to 48 h is initialized at time t = 0 by assimilating data from the preceding 24 h. The assimilation scheme finds the generalized ...

A. F. Bennett; L. M. Leslie; C. R. Hagelberg; P. E. Powers

1993-06-01T23:59:59.000Z

336

Tropical cyclones and drought amelioration in the Gulf and Southeastern Coastal United States  

Science Conference Proceedings (OSTI)

Precipitation from land-falling tropical cyclones (TCs) has a significant hydroclimatic influence in the southeastern United States, particularly during drought years. The frequency with which TCs ended drought conditions was examined for ...

Justin T. Maxwell; Jason T. Ortegren; Paul A. Knapp; Peter T. Soulé

337

An Analytic Vortex Initialization Technique for Idealized Tropical Cyclone Studies in AGCMs  

Science Conference Proceedings (OSTI)

The paper discusses the design of idealized tropical cyclone experiments in atmospheric general circulation models (AGCMs). The evolution of an initially weak, warm-core vortex is investigated over a 10-day period with varying initial conditions ...

Kevin A. Reed; Christiane Jablonowski

2011-02-01T23:59:59.000Z

338

Evolution of the Surface Wind Field in an Intensifying Tropical Cyclone  

Science Conference Proceedings (OSTI)

The surface wind field in a developing tropical cyclone (Agnes, 1972) was analyzed over a 1660 km radius for four days using conventional surface data, as the storm evolved from a disorganized depression to a hurricane. The transition to ...

John Molinari; Steven Skubis

1985-12-01T23:59:59.000Z

339

A novel multi-scale intensity metric for evaluation of tropical cyclone intensity forecasts  

Science Conference Proceedings (OSTI)

In this study, a new Multi-Scale Intensity (MSI) metric for evaluating Tropical Cyclone (TC) intensity forecasts is presented. The metric consists of the resolvable and observable, low wavenumber intensity represented by the sum of amplitudes of ...

Tomislava Vukicevic; Eric Uhlhorn; Paul Reasor; Bradley Klotz

340

Understanding and Forecasting Tropical Cyclone Intensity Change with the Typhoon Intensity Prediction Scheme (TIPS)  

Science Conference Proceedings (OSTI)

A multiple regression scheme with tropical cyclone intensity change as the dependent variable has been developed. The new scheme is titled the Typhoon Intensity Prediction Scheme (TIPS) and is similar to one used operationally at the National ...

Patrick J. Fitzpatrick

1997-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Influence of ENSO on Tropical Cyclone Intensity in the Fiji Region  

Science Conference Proceedings (OSTI)

This study examines the variation in tropical cyclone (TC) intensity for different phases of the El Niño–Southern Oscillation (ENSO) phenomenon in the Fiji, Samoa, and Tonga (FST) region. The variation in TC intensity is inferred from the ...

Savin S. Chand; Kevin J. E. Walsh

2011-08-01T23:59:59.000Z

342

Evaluation of an Analytical Model for the Maximum Intensity of Tropical Cyclones  

Science Conference Proceedings (OSTI)

Several studies have shown that the intensity of numerically simulated tropical cyclones can exceed (by 50%) a theoretical upper limit. To investigate the cause, this study evaluates the underlying components of Emanuel’s commonly cited analytic ...

George H. Bryan; Richard Rotunno

2009-10-01T23:59:59.000Z

343

A Vortex Relocation Scheme for Tropical Cyclone Initialization in Advanced Research WRF  

Science Conference Proceedings (OSTI)

This paper introduces a relocation scheme for tropical cyclone (TC) initialization in the Advanced Research Weather Research and Forecasting (ARW-WRF) model and demonstrates its application to 70 forecasts of Typhoons Sinlaku (2008), Jangmi (2008)...

Ling-Feng Hsiao; Chi-Sann Liou; Tien-Chiang Yeh; Yong-Run Guo; Der-Song Chen; Kang-Ning Huang; Chuen-Teyr Terng; Jen-Her Chen

2010-08-01T23:59:59.000Z

344

Global Ensemble Predictions of 2009’s Tropical Cyclones Initialized with an Ensemble Kalman Filter  

Science Conference Proceedings (OSTI)

Verification was performed on ensemble forecasts of 2009 Northern Hemisphere summer tropical cyclones (TCs) from two experimental global numerical weather prediction ensemble prediction systems (EPSs). The first model was a high-resolution ...

Thomas M. Hamill; Jeffrey S. Whitaker; Michael Fiorino; Stanley G. Benjamin

2011-02-01T23:59:59.000Z

345

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

346

The BMRC High-Resolution Tropical Cyclone Prediction System: TC-LAPS  

Science Conference Proceedings (OSTI)

A new Tropical Cyclone Limited Area Prediction System has been developed at the Australian Bureau of Meteorology Research Centre. The features of the new prediction system can be summarized as follows: first, a 12-h, coarse-resolution data ...

Noel E. Davidson; Harry C. Weber

2000-05-01T23:59:59.000Z

347

Variations in Tropical Cyclone Genesis Factors in Simulations of the Holocene Epoch  

Science Conference Proceedings (OSTI)

The thermodynamic factors related to tropical cyclone genesis are examined in several simulations of the middle part of the Holocene epoch when the precession of Earth’s orbit altered the seasonal distribution of solar radiation and in one ...

Robert L. Korty; Suzana J. Camargo; Joseph Galewsky

2012-12-01T23:59:59.000Z

348

Improving Ocean Model Initialization for Coupled Tropical Cyclone Forecast Models Using GODAE Nowcasts  

Science Conference Proceedings (OSTI)

To simulate tropical cyclone (TC) intensification, coupled ocean–atmosphere prediction models must realistically reproduce the magnitude and pattern of storm-forced sea surface temperature (SST) cooling. The potential for the ocean to support ...

G. R. Halliwell Jr.; L. K. Shay; S. D. Jacob; O. M. Smedstad; E. W. Uhlhorn

2008-07-01T23:59:59.000Z

349

Dynamical and Physical Processes Leading to Tropical Cyclone Intensification under Upper-Level Trough Forcing  

Science Conference Proceedings (OSTI)

The rapid intensification of Tropical Cyclone (TC) Dora (2007, southwest Indian Ocean) under upper-level trough forcing is investigated. TC–trough interaction is simulated using a limited-area operational numerical weather prediction model. The ...

Marie-Dominique Leroux; Matthieu Plu; David Barbary; Frank Roux; Philippe Arbogast

2013-08-01T23:59:59.000Z

350

Restratification of the Upper Ocean after the Passage of a Tropical Cyclone: A Numerical Study  

Science Conference Proceedings (OSTI)

The role of baroclinic instability in the restratification of the upper ocean after the passage of a tropical cyclone (TC) is determined by means of numerical simulations. Using a regional ocean model, the Regional Ocean Modeling System (ROMS), a ...

Wei Mei; Claudia Pasquero

2012-09-01T23:59:59.000Z

351

International Experiments to Study Tropical Cyclones in the Western North Pacific  

Science Conference Proceedings (OSTI)

Four separate (but coincident in time) field experiments to study tropical cyclones in the western North Pacific area will be carried out during August/September 1990 by the United States, the Economic and Social Commission for Asia and the ...

Russell L. Elsberry

1990-09-01T23:59:59.000Z

352

Tropical Cyclone Motion and Surrounding Flow Relationships: Searching for Beta Gyres in Omega Dropwindsonde Datasets  

Science Conference Proceedings (OSTI)

In 1982, the National Oceanic and Atmospheric Administration's Hurricane Research Division began a series of experiments to collect Omega dropwindsonde (ODW) observations within about 1000 km of the center of tropical cyclones. By 1992, 16 ODW ...

James L. Franklin; Steven E. Feuer; John Kaplan; Sim D. Aberson

1996-01-01T23:59:59.000Z

353

Toward improved tropical cyclone intensity forecasts : probabilistic prediction, predictability, and the role of verification  

E-Print Network (OSTI)

Over the past two decades, deterministic predictions of tropical cyclone (TC) intensity consistently scored poorly in mean absolute error (MAE) verification, despite the concurrent advancement of TC modeling and observing ...

Moskaitis, Jonathan Robert

2009-01-01T23:59:59.000Z

354

Objective Debiasing for Improved Forecasting of Tropical Cyclone Intensity with a Global Circulation Model  

Science Conference Proceedings (OSTI)

The damage potential of a tropical cyclone is proportional to a power (generally greater than one) of intensity, which demands high accuracy in forecasting intensity for managing this natural disaster. However, the current skill in forecasting ...

P. Goswami; S. Mallick; K. C. Gouda

2011-08-01T23:59:59.000Z

355

The Effect of Internally Generated Inner-Core Asymmetries on Tropical Cyclone Potential Intensity  

Science Conference Proceedings (OSTI)

In a quiescent environment on an f plane, the internal dynamic processes of a tropical cyclone (TC) can generate axially asymmetric circulations (asymmetries) in its inner-core region. The present study investigates how these inner-core ...

Bo Yang; Yuqing Wang; Bin Wang

2007-04-01T23:59:59.000Z

356

Association Rule Data Mining Applications for Atlantic Tropical Cyclone Intensity Changes  

Science Conference Proceedings (OSTI)

This study applies a data mining technique called association rule mining to the analysis of intensity changes of North Atlantic tropical cyclones (TCs). The “best track” data from the National Hurricane Center and the Statistical Hurricane ...

Ruixin Yang; Jiang Tang; Donglian Sun

2011-06-01T23:59:59.000Z

357

Ensemble Forecasting of Tropical Cyclone Motion Using a Barotropic Model. Part II: Perturbations of the Vortex  

Science Conference Proceedings (OSTI)

In Part I of this study, the technique of ensemble forecasting is applied to the problem of tropical cyclone motion prediction by perturbing the environmental flow. In this part, the focus is shifted to perturbation of the vortex structure. The ...

Kevin K. W. Cheung; Johnny C. L. Chan

1999-11-01T23:59:59.000Z

358

Joint Typhoon Warning Center and the Challenges of Multibasin Tropical Cyclone Forecasting  

Science Conference Proceedings (OSTI)

The Joint Typhoon Warning Center (JTWC), a specialized component of the Naval Oceanography Command Center, Guam, is the busiest tropical cyclone warning center in the world. Its area of responsibility encompasses four broad oceanic areas of ...

Charles P. Guard; Lester E. Carr; Frank H. Wells; Richard A. Jeffries; Nicholas D. Gural; Dianne K. Edson

1992-06-01T23:59:59.000Z

359

Tropical Cyclone Formation Guidance Using Pregenesis Dvorak Climatology. Part I: Operational Forecasting and Predictive Potential  

Science Conference Proceedings (OSTI)

While there are a variety of modes for tropical cyclone (TC) development, there have been relatively few efforts to systematically catalog both nondeveloping and developing cases. This paper introduces an operationally derived climatology of ...

Joshua H. Cossuth; Richard D. Knabb; Daniel P. Brown; Robert E. Hart

2013-02-01T23:59:59.000Z

360

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

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Current Capability of Operational Numerical Models in Predicting Tropical Cyclone Intensity in the Western North Pacific  

Science Conference Proceedings (OSTI)

Forecasts of tropical cyclone (TC) intensity from six operational models (three global models and three regional models) during 2010 and 2011 are assessed to study the current capability of model guidance in the western North Pacific. The ...

Hui Yu; Peiyan Chen; Qingqing Li; Bi Tang

2013-04-01T23:59:59.000Z

362

Self-Stratification of Tropical Cyclone Outflow. Part I: Implications for Storm Structure  

E-Print Network (OSTI)

Extant theoretical work on the steady-state structure and intensity of idealized axisymmetric tropical cyclones relies on the assumption that isentropic surfaces in the storm outflow match those of the unperturbed environment ...

Emanuel, Kerry Andrew

363

Long-term rainfall risk from tropical cyclones in coastal areas  

E-Print Network (OSTI)

We develop a methodology for the frequency of extreme rainfall intensities caused by tropical cyclones (TCs) in coastal areas. The model does not account for landfall effects. This makes the developed framework best suited ...

Veneziano, Daniele

364

Environmental Dynamical Control of Tropical Cyclone Intensity—An Observational Study  

Science Conference Proceedings (OSTI)

The effects of two environmental dynamical factors, namely, the transitional speed and vertical wind shear, on tropical cyclone (TC) intensification, intensity, and lifetime peak intensity were analyzed based on observations in the western North ...

Zhihua Zeng; Yuqing Wang; Chun-Chieh Wu

2007-01-01T23:59:59.000Z

365

Sudden Tropical Cyclone Track Changes over the Western North Pacific: A Composite Study  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) over the western North Pacific (WNP) are usually embedded in the multitime-scale summer monsoon circulation and occasionally experience sudden track changes, which are currently a challenge in TC forecasting. A composite ...

Liguang Wu; Zhongping Ni; Jingjing Duan; Huijun Zong

2013-08-01T23:59:59.000Z

366

A Transition Mechanism for the Spontaneous Axisymmetric Intensification of Tropical Cyclones  

Science Conference Proceedings (OSTI)

A mechanism for the transition of tropical cyclones (TCs) to the spontaneous rapid intensification (RI) phase is proposed based on numerical results of a three-dimensional full-physics model. The intensification phase of the simulated TC is ...

Yoshiaki Miyamoto; Tetsuya Takemi

2013-01-01T23:59:59.000Z

367

Impact of the latitudinal distribution of tropical cyclones on ocean heat transport  

E-Print Network (OSTI)

The heavy winds associated with tropical cyclones generate strong upper ocean mixing. Recent studies suggest that this enhanced mixing significantly contributes to the ocean poleward heat transport, mainly due to a ...

Jansen, Malte Friedrich

368

Does It Make Sense To Modify Tropical Cyclones? A Decision-Analytic Assessment  

E-Print Network (OSTI)

Recent dramatic increases in damages caused by tropical cyclones (TCs) and improved understanding of TC physics have led DHS to fund research on intentional hurricane modification. We present a decision analytic assessment ...

Klima, Kelly

369

Validation of a Tropical Cyclone Steering Response Function with a Barotropic Adjoint Model  

Science Conference Proceedings (OSTI)

The steering of a tropical cyclone (TC) vortex is commonly understood as the advection of the TC vortex by an “environmental wind.” In past studies, the environmental steering wind vector has been defined by the horizontal and vertical averaging ...

Brett T. Hoover; Michael C. Morgan

2010-06-01T23:59:59.000Z

370

Verification of Ensemble-Based Uncertainty Circles around Tropical Cyclone Track Forecasts  

Science Conference Proceedings (OSTI)

Several tropical cyclone forecasting centers issue uncertainty information with regard to their official track forecasts, generally using the climatological distribution of position error. However, such methods are not able to convey information ...

Thierry Dupont; Matthieu Plu; Philippe Caroff; Ghislain Faure

2011-10-01T23:59:59.000Z

371

Tropical Cyclone Wind Retrievals from the Advanced Microwave Sounding Unit: Application to Surface Wind Analysis  

Science Conference Proceedings (OSTI)

Horizontal winds at 850 hPa from tropical cyclones retrieved using the nonlinear balance equation, where the mass field was determined from Advanced Microwave Sounding Unit (AMSU) temperature soundings, are compared with the surface wind fields ...

Kotaro Bessho; Mark DeMaria; John A. Knaff

2006-03-01T23:59:59.000Z

372

Interpretation of Tropical Cyclone Forecast Sensitivity from the Singular Vector Perspective  

Science Conference Proceedings (OSTI)

In this study, the leading singular vectors (SVs), which are the fastest-growing perturbations (in a linear sense) to a given forecast, are used to examine and classify the dynamic relationship between tropical cyclones (TCs) and synoptic-scale ...

Jan-Huey Chen; Melinda S. Peng; Carolyn A. Reynolds; Chun-Chieh Wu

2009-11-01T23:59:59.000Z

373

Size and Strength of Tropical Cyclones as Inferred from QuikSCAT Data  

Science Conference Proceedings (OSTI)

A comprehensive statistical climatology of the size and strength of the tropical cyclones (TCs) occurring over the western North Pacific (WNP; including the South China Sea) and the North Atlantic (NA; including the Gulf of Mexico and the ...

Kelvin T. F. Chan; Johnny C. L. Chan

2012-03-01T23:59:59.000Z

374

Performance of the United Kingdom Meteorological Office Global Model in Predicting the Movement of Tropical Cyclones  

Science Conference Proceedings (OSTI)

A detailed evaluation of the performance of the United Kingdom Meteorological Office Global Model (UKMO) in predicting the movement of 15 tropical cyclones (TCs) that occurred over the western North Pacific during 1987 is presented. The ...

Johnny C. L. Chan; Wai-Kau Kay

1993-09-01T23:59:59.000Z

375

Consistent Tropical Cyclone Wind and Wave Forecasts for the U.S. Navy  

Science Conference Proceedings (OSTI)

A new algorithm to generate wave heights consistent with tropical cyclone official forecasts from the Joint Typhoon Warning Center (JTWC) has been developed. The process involves generating synthetic observations from the forecast track and the ...

Charles R. Sampson; Paul A. Wittmann; Hendrik L. Tolman

2010-08-01T23:59:59.000Z

376

A Simple Empirical Model for Predicting the Decay of Tropical Cyclone Winds after Landfall  

Science Conference Proceedings (OSTI)

An empirical model for predicting the maximum wind of landfalling tropical cyclones is developed. The model is based upon the observation that the wind speed decay rate after landfall is proportional to the wind speed. Observations also indicate ...

John Kaplan; Mark DeMaria

1995-11-01T23:59:59.000Z

377

On the Orientation of Grid Systems for the Statistical Prediction of Tropical Cyclone Motion  

Science Conference Proceedings (OSTI)

Statistical models for the prediction of tropical cyclone motion traditionally have been formulated in a coordinate system oriented with respect to zonal and meridional directions. An investigation is made here into the forecast error reducing ...

Lloyd J. Shapiro; Charles J. Neumann

1984-01-01T23:59:59.000Z

378

Attribution of Projected Future Changes in Tropical Cyclone Passage Frequency over the Western North Pacific  

Science Conference Proceedings (OSTI)

This paper performs an attribution analysis of future changes in the frequency of tropical cyclone (TC) passages over the western North Pacific basin projected by seven general circulation models. The models project increases in the passage ...

Satoru Yokoi; Yukari N. Takayabu; Hiroyuki Murakami

2013-06-01T23:59:59.000Z

379

The Impact of Anthropogenic Climate Change on North Atlantic Tropical Cyclone Tracks  

Science Conference Proceedings (OSTI)

The authors examine the change in tropical cyclone (TC) tracks that results from projected changes in the large-scale steering flow and genesis location from increasing greenhouse gases. Tracks are first simulated using a Beta and Advection Model (...

Angela J. Colbert; Brian J. Soden; Gabriel A. Vecchi; Ben P. Kirtman

2013-06-01T23:59:59.000Z

380

An Evaluation of the Impact of Horizontal Resolution on Tropical Cyclone Predictions using COAMPS-TC  

Science Conference Proceedings (OSTI)

A series of experiments have been conducted using the Coupled Ocean/Atmosphere Mesoscale Prediction System – Tropical Cyclone (COAMPS-TC) to assess the impact of horizontal resolution on hurricane intensity prediction for ten Atlantic storms from ...

Hao Jin; Melinda S. Peng; Yi Jin; James D. Doyle

Note: This page contains sample records for the topic "tropical cyclone activity" 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

An Evaluation of Tropical Cyclone Genesis Forecasts from Global Numerical Models  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) forecasts rely heavily on output from global numerical models. While considerable research has investigated the skill of various models with respect to track and intensity, few studies have considered how well global models ...

Daniel J. Halperin; Henry E. Fuelberg; Robert E. Hart; Joshua H. Cossuth; Philip Sura; Richard J. Pasch

2013-12-01T23:59:59.000Z

382

Tropical Cyclone Data Impact Studies: Influence of Model Bias and Synthetic Observations  

Science Conference Proceedings (OSTI)

The impacts of assimilating dropwindsonde data and enhanced atmospheric motion vectors (AMVs) on tropical cyclone track forecasts are examined using the Navy global data assimilation and forecasting systems. Enhanced AMVs have the largest impact ...

Carolyn A. Reynolds; Rolf Langland; Patricia M. Pauley; Christopher Velden

2013-12-01T23:59:59.000Z

383

North American tropical cyclone landfall and SST: a statistical model study  

Science Conference Proceedings (OSTI)

A statistical-stochastic model of the complete lifecycle of North Atlantic (NA) tropical cyclones (TCs) is used to examine the relationship between climate and landfall rates along the North-American Atlantic and Gulf coasts. The model draws on ...

Timothy Hall; Emmi Yonekura

384

Satellite Analysis of Tropical Cyclones Using the Advanced Microwave Sounding Unit (AMSU)  

Science Conference Proceedings (OSTI)

The first Advanced Microwave Sounding Unit (AMSU) was launched aboard the NOAA—15 satellite on 13 May 1998. The AMSU is well suited for the observation of tropical cyclones because its measurements are not significantly affected by the ice clouds ...

Stanley Q. Kidder; Mitchell D. Goldberg; Raymond M. Zehr; Mark DeMaria; James F. W. Purdom; Christopher S. Velden; Norman C. Grody; Sheldon J. Kusselson

2000-06-01T23:59:59.000Z

385

Intercomparison of Targeted Observation Guidance for Tropical Cyclones in the Northwestern Pacific  

Science Conference Proceedings (OSTI)

This study compares six different guidance products for targeted observations over the northwest Pacific Ocean for 84 cases of 2-day forecasts in 2006 and highlights the unique dynamical features affecting the tropical cyclone (TC) tracks in this ...

Chun-Chieh Wu; Jan-Huey Chen; Sharanya J. Majumdar; Melinda S. Peng; Carolyn A. Reynolds; Sim D. Aberson; Roberto Buizza; Munehiko Yamaguchi; Shin-Gan Chen; Tetsuo Nakazawa; Kun-Hsuan Chou

2009-08-01T23:59:59.000Z

386

Annual Volume and Area Variations in Tropical Cyclone Rainfall over the Eastern United States  

Science Conference Proceedings (OSTI)

This paper examines tropical cyclone (TC) rainfall in the eastern United States from the perspective of documenting accumulated annual water volumes and areas of the precipitation. Volume is a value that merges both rainfall depth and rainfall ...

Ricardo C. Nogueira; Barry D. Keim

2010-08-01T23:59:59.000Z

387

Observed versus GCM-Generated Local Tropical Cyclone Frequency: Comparisons Using a Spatial Lattice  

Science Conference Proceedings (OSTI)

Of broad scientific and public interest is the reliability of global climate models (GCMs) to simulate future regional and local tropical cyclone (TC) occurrences. Atmospheric GCMs are now able to generate vortices resembling actual TCs, but ...

Sarah Strazzo; James B. Elsner; Timothy LaRow; Daniel J. Halperin; Ming Zhao

2013-11-01T23:59:59.000Z

388

Objective Estimation of Tropical Cyclone Wind Structure from Infrared Satellite Data  

Science Conference Proceedings (OSTI)

Geostationary infrared (IR) satellite data are used to provide estimates of the symmetric and total low-level wind fields in tropical cyclones, constructed from estimations of an azimuthally averaged radius of maximum wind (RMAX), a symmetric ...

Kimberly J. Mueller; Mark DeMaria; John Knaff; James P. Kossin; Thomas H. Vonder Haar

2006-12-01T23:59:59.000Z

389

Evaluation of the National Hurricane Center’s Tropical Cyclone Wind Speed Probability Forecast Product  

Science Conference Proceedings (OSTI)

A tropical cyclone (TC) wind speed probability forecast product developed at the Cooperative Institute for Research in the Atmosphere (CIRA) and adopted by the National Hurricane Center (NHC) is evaluated for U.S. land-threatening and landfalling ...

Michael E. Splitt; Jaclyn A. Shafer; Steven M. Lazarus; William P. Roeder

2010-04-01T23:59:59.000Z

390

Influences of ENSO on Western North Pacific Tropical Cyclone Kinetic Energy and Its Meridional Transport  

Science Conference Proceedings (OSTI)

This study investigates the influences of ENSO on tropical cyclone (TC) kinetic energy and its meridional transport in the western North Pacific (WNP) using the TC wind field obtained after a method for removing TC vortices from reanalysis data is ...

Yao Ha; Zhong Zhong; Yijia Hu; Xiuqun Yang

2013-01-01T23:59:59.000Z

391

Scientific Prerequisites to Comprehension of the Tropical Cyclone Forecast: Intensity, Track, and Size  

Science Conference Proceedings (OSTI)

The communication by forecasters of tropical cyclone (TC) descriptions and forecasts to user communities necessarily involves the transmission of information based in science to different classes of users composed primarily of nonscientists. ...

Lori Drake

2012-04-01T23:59:59.000Z

392

An Updated Climatology of Tropical Cyclone Impacts on the Southwestern United States  

Science Conference Proceedings (OSTI)

A dataset of 167 eastern North Pacific tropical cyclones (TCs) is investigated for potential impacts in the southwestern United States over the period 1989–2009 and evaluated in the context of a 30-yr climatology. The statistically significant ...

Kimberly M. Wood; Elizabeth A. Ritchie

2013-12-01T23:59:59.000Z

393

Forecasting Tropical Cyclone Formation in the Fiji Region: A Probit Regression Approach Using Bayesian Fitting  

Science Conference Proceedings (OSTI)

An objective methodology for forecasting the probability of tropical cyclone (TC) formation in the Fiji, Samoa, and Tonga regions (collectively the FST region) using antecedent large-scale environmental conditions is investigated. Three separate ...

Savin S. Chand; Kevin J. E. Walsh

2011-04-01T23:59:59.000Z

394

An Improved Statistical Scheme for the Prediction of Tropical Cyclones Making Landfall in South China  

Science Conference Proceedings (OSTI)

This study describes an improved statistical scheme for predicting the annual number of tropical cyclones (TCs) making landfall along the coast of south China using data from 1965 to 2005. Based on the factors affecting TC behavior inside the ...

Andy Zung-Ching Goh; Johnny C. L. Chan

2010-04-01T23:59:59.000Z

395

TROPICAL CYCLONE WINDS AT LANDFALL: The ASOS–C-MAN Wind Exposure Documentation Project  

Science Conference Proceedings (OSTI)

Photographs describing the wind exposure at automatic weather stations susceptible to tropical cyclones are now available on Web pages at the National Climatic Data Center and the National Data Buoy Center. Given the exposure for one of eight ...

Mark Powell; David Bowman; David Gilhousen; Shirley Murillo; Nick Carrasco; Russell St. Fleur

2004-06-01T23:59:59.000Z

396

An Evaluation of Dvorak Technique–Based Tropical Cyclone Intensity Estimates  

Science Conference Proceedings (OSTI)

The satellite-based Dvorak technique (DVKT) is the most widely available and readily used tool for operationally estimating the maximum wind speeds associated with tropical cyclones. The DVKT itself produces internally consistent results, is ...

John A. Knaff; Daniel P. Brown; Joe Courtney; Gregory M. Gallina; John L. Beven II

2010-10-01T23:59:59.000Z

397

Using Mesoscale Simulations to Train Statistical Models of Tropical Cyclone Intensity over Land  

Science Conference Proceedings (OSTI)

The decay of tropical cyclones after landfall is a key factor in estimating the extent of the hazard overland. Yet our current understanding of this decay is challenged by the low frequency of past events. Consequently, one cannot rely solely ...

Augustin Colette; Nadja Leith; Vincent Daniel; Enrica Bellone; David S. Nolan

2010-06-01T23:59:59.000Z

398

An updated climatology of tropical cyclone impacts on the southwestern United States  

Science Conference Proceedings (OSTI)

A dataset of 167 eastern North Pacific tropical cyclones (TCs) are investigated for potential impacts in the southwestern United States over the period 1989-2009 and evaluated in the context of a 30-yr climatology. The statistically significant ...

Kimberly M. Wood; Elizabeth A. Ritchie

399

Observational Evidence for Alternate Modes of Track-Altering Binary Tropical Cyclone Scenarios  

Science Conference Proceedings (OSTI)

An observational study of western North Pacific tropical cyclones (TC) revealed many cases of two TCs whose tracks were altered by processes that were quite different from the mutual advection (Fujiwhara-type) processes. Thus, four conceptual ...

Lester E. Carr III; Mark A. Boothe; Russell L. Elsberry

1997-09-01T23:59:59.000Z

400

Mesoscale Features Associated with Tropical Cyclone Formations in the Western North Pacific  

Science Conference Proceedings (OSTI)

The mesoscale features of 124 tropical cyclone formations in the western North Pacific Ocean during 1999–2004 are investigated through large-scale analyses, satellite infrared brightness temperature (TB), and Quick Scatterometer (QuikSCAT) ...

Cheng-Shang Lee; Kevin K. W. Cheung; Jenny S. N. Hui; Russell L. Elsberry

2008-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Accuracy of Atlantic and Eastern North Pacific Tropical Cyclone Intensity Forecast Guidance  

Science Conference Proceedings (OSTI)

Five statistical and dynamical tropical cyclone intensity guidance techniques available at the National Hurricane Center (NHC) during the 2003 and 2004 Atlantic and eastern North Pacific seasons were evaluated within three intensity phases: (I) ...

Russell L. Elsberry; Tara D. B. Lambert; Mark A. Boothe

2007-08-01T23:59:59.000Z

402

Large-Scale Environmental Parameters Associated with Tropical Cyclone Formations in the Western North Pacific  

Science Conference Proceedings (OSTI)

The local environmental conditions associated with 405 tropical cyclone (TC) formations in the western North Pacific during 1990–2001 are examined in this study. Six large-scale parameters are obtained and computed from the NCEP reanalyses with ...

Kevin K. W. Cheung

2004-02-01T23:59:59.000Z

403

Simulations of the Transformation Stage of the Extratropical Transition of Tropical Cyclones  

Science Conference Proceedings (OSTI)

The physical mechanisms associated with the transformation stage of the extratropical transition of a tropical cyclone are simulated with a mesoscale model using initial environmental conditions that approximate the mean circulations defined by ...

Elizabeth A. Ritchie; Russell L. Elsberry

2001-06-01T23:59:59.000Z

404

Developing versus Nondeveloping Disturbances for Tropical Cyclone Formation. Part II: Western North Pacific  

Science Conference Proceedings (OSTI)

Global daily reanalysis fields from the Navy Operational Global Atmospheric Prediction System (NOGAPS) are used to analyze Northern Hemisphere summertime (June–September) developing and nondeveloping disturbances for tropical cyclone (TC) ...

Bing Fu; Melinda S. Peng; Tim Li; Duane E. Stevens

2012-04-01T23:59:59.000Z

405

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

406

Tropical Cyclone Rainfall Characteristics as Determined from a Satellite Passive Microwave Radiometer  

Science Conference Proceedings (OSTI)

Data from the Nimbus-5 F-Electrically Scanning Microwave Radiometer (ESMR-5) have been used to calculate latent heat release (LHR) and other rainfall parameters for over 70 satelite observations of 21 tropical cyclones during 1973, 1974 and 1975 ...

E. B. Rodgers; R. F. Adler

1981-03-01T23:59:59.000Z

407

A Numerical Study of the Effect of Dissipative Heating on Tropical Cyclone Intensity  

Science Conference Proceedings (OSTI)

The impact of dissipative heating on tropical cyclone (TC) intensity forecasts is investigated using the U.S. Navy’s operational mesoscale model (the Coupled Ocean/Atmosphere Mesoscale Prediction System). A physically consistent method of ...

Yi Jin; William T. Thompson; Shouping Wang; Chi-Sann Liou

2007-10-01T23:59:59.000Z

408

An Examination of Tropical Cyclone Position, Intensity, and Intensity Life Cycle within Atmospheric Reanalysis Datasets  

Science Conference Proceedings (OSTI)

The following study examines the position and intensity differences of tropical cyclones (TCs) among the Best-Track and five atmospheric reanalysis datasets to evaluate the degree to which reanalyses are appropriate for studying TCs. While ...

Benjamin A. Schenkel; Robert E. Hart

2012-05-01T23:59:59.000Z

409

The Roles of an Expanding Wind Field and Inertial Stability in Tropical Cyclone Secondary Eyewall Formation  

Science Conference Proceedings (OSTI)

The Weather and Research and Forecasting Model (WRF) is used to simulate secondary eyewall formation (SEF) in a tropical cyclone (TC) on the ? plane. The simulated SEF process is accompanied by an outward expansion of kinetic energy and the TC ...

Christopher M. Rozoff; David S. Nolan; James P. Kossin; Fuqing Zhang; Juan Fang

2012-09-01T23:59:59.000Z

410

An evaluation of tropical cyclone genesis forecasts from global numerical models  

Science Conference Proceedings (OSTI)

Tropical cyclone (TC) forecasts rely heavily on output from global numerical models. While some research has investigated the skill of various models with respect to track and intensity, few studies have considered how well global models forecast ...

Daniel J. Halperin; Henry E. Fuelberg; Robert E. Hart; Joshua H. Cossuth; Philip Sura; Richard J. Pasch

411

Tropical Cyclone Data Impact Studies: Influence of Model Bias and Synthetic Observations  

Science Conference Proceedings (OSTI)

The impacts of assimilating dropwindsonde data and enhanced atmospheric motion vectors (AMVs) on tropical cyclone track forecasts are examined using the Navy global data assimilation and forecasting systems. Enhanced AMVs have the largest impact ...

Carolyn A. Reynolds; Rolf Langland; Patricia M. Pauley; Christopher Velden

412

Heavy Rainfall Induced by Tropical Cyclones across Northern Taiwan and Associated Intraseasonal Oscillation Modulation  

Science Conference Proceedings (OSTI)

Tropical cyclones (TCs) moving northwestward/westward across northern Taiwan are defined to have a type-2 track. This study aims to analyze heavy rainfall associated with type-2 TCs in Taiwan, focusing on the modulation processes of the ...

Jau-Ming Chen; Pei-Hua Tan; Ching-Feng Shih

413

Effects of Vertical Wind Shear and Storm Motion on Tropical Cyclone Rainfall Asymmetries Deduced from TRMM  

Science Conference Proceedings (OSTI)

Vertical wind shear and storm motion are two of the most important factors contributing to rainfall asymmetries in tropical cyclones (TCs). Global TC rainfall structure, in terms of azimuthal distribution and asymmetries relative to storm motion, ...

Shuyi S. Chen; John A. Knaff; Frank D. Marks Jr.

2006-11-01T23:59:59.000Z

414

Dynamical and Precipitation Structures of Poleward-Moving Tropical Cyclones in Eastern Canada, 1979–2005  

Science Conference Proceedings (OSTI)

Tropical cyclones in the western North Atlantic basin are a persistent threat to human interests along the east coast of North America. Occurring mainly during the late summer and early autumn, these storms often cause strong winds and extreme ...

Shawn M. Milrad; Eyad H. Atallah; John R. Gyakum

2009-03-01T23:59:59.000Z

415

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

416

Case Studies of Tropical Cyclones and Phytoplankton Blooms over Atlantic and Pacific Regions  

Science Conference Proceedings (OSTI)

This study investigates phytoplankton blooms following the passage of Tropical Cyclones in the Atlantic and Pacific Ocean Basins. The variables of sea surface temperature (SST), chlorophyll (Chl-a), precipitation, and storm surface winds were ...

Ashley M. Merritt-Takeuchi; Sen Chiao

417

The Extratropical Transition of Tropical Cyclone Lili (1996) and Its Crucial Contribution to a Moderate Extratropical Development  

Science Conference Proceedings (OSTI)

The transition that a tropical cyclone experiences as it moves into the extratropical environment (known as extratropical transition) can result in the decay or intensification of a baroclinic cyclone. The extratropical transition (ET) of ...

Anna Agustí-Panareda; Suzanne L. Gray; George C. Craig; Chris Thorncroft

2005-06-01T23:59:59.000Z

418

Interactions of Tropopause Depressions with an Ex–Tropical Cyclone and Sensitivity of Forecasts to Analysis Errors  

Science Conference Proceedings (OSTI)

This paper focuses on the coupling between an ex–tropical cyclone and two preexisting mesoscale tropopause depressions (TDs). The TDs approached the cyclone from widely separated sources after becoming cut off from different upper-level troughs ...

K. A. Browning; A. J. Thorpe; A. Montani; D. Parsons; M. Griffiths; P. Panagi; E. M. Dicks

2000-08-01T23:59:59.000Z

419

Synoptic Composites of the Extratropical Transition Life Cycle of North Atlantic Tropical Cyclones: Factors Determining Posttransition Evolution  

Science Conference Proceedings (OSTI)

A 34-member ensemble-mean trajectory through the cyclone phase space (CPS) is calculated using Navy Operational Global Atmospheric Prediction System (NOGAPS) analyses for North Atlantic tropical cyclones (TCs) undergoing extratropical transition (...

Robert E. Hart; Jenni L. Evans; Clark Evans

2006-02-01T23:59:59.000Z

420

An Empirical Model for Predicting the Decay of Tropical Cyclone Wind Speed after Landfall over the Indian Region  

Science Conference Proceedings (OSTI)

An empirical model for predicting the maximum surface wind speed associated with a tropical cyclone after crossing the east coast of India is described. The model parameters are determined from the database of 19 recent cyclones. The model is ...

S. K. Roy Bhowmik; S. D. Kotal; S. R. Kalsi

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Scaling laws for the tropical cyclone derived from the stationary atmospheric vortex equation  

E-Print Network (OSTI)

We present results of a numerical study of the differential equation governing the stationary states of the two-dimensional planetary atmosphere and magnetized plasma (within the Charney Hasegawa Mima model). The results show an interesting similarity with the morphology of a tropical cyclone. Quantitative comparisons are also favorable and several scaling laws can be formulated connecting the charactersistic physical parameters of the tropical cyclone.

Spineanu, F; Spineanu, Florin; Vlad, Madalina

2006-01-01T23:59:59.000Z

422

Objective Indicators of the Life Cycle Evolution of Extratropical Transition for Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

Forty-six percent of Atlantic tropical storms undergo a process of extratropical transition (ET) in which the storm evolves from a tropical cyclone to a baroclinic system. In this paper, the structural evolution of a base set of 61 Atlantic ...

Jenni L. Evans; Robert E. Hart

2003-05-01T23:59:59.000Z

423

Multimodel Approach Based on Evidence Theory for Forecasting Tropical Cyclone Tracks  

Science Conference Proceedings (OSTI)

In this paper a new multimodel approach for forecasting tropical cyclone tracks is presented. The approach is based on the Dempster–Shafer theory of evidence. At each forecast period, the multimodel forecast is given as an area where the tropical ...

Svetlana V. Poroseva; Nathan Lay; M. Yousuff Hussaini

2010-02-01T23:59:59.000Z

424

Axisymmetrically Tropical Cyclone-like Vortices with Secondary Circulations  

E-Print Network (OSTI)

The secondary circulation of the tropical cyclone (TC) is related to its formation and intensification, thus becomes very important in the studies. The analytical solutions have both the primary and secondary circulation in a three-dimensionally nonhydrostatic and adiabatic model. We prove that there are three intrinsic radiuses for the axisymmetrically ideal incompressible flow. The first one is the radius of maximum primary circular velocity $r_m$. The second one is radius of the primary kernel $r_k>r_m$, across which the vorticity of the primary circulation changes sign and the vertical velocity changes direction. The last one is the radius of the maximum primary vorticity $r_d$, at which the vertical flow of the secondary circulation approaches its maximum, and across which the radius velocity changes sign. The first TC-like vortex solution has universal inflow or outflow. The relations between the intrinsic length scales are $r_k=\\sqrt{2}r_m$ and $r_d=2r_m$. The second one is a multi-planar solution, per...

Sun, Liang

2013-01-01T23:59:59.000Z

425

Extratropical Transition of Tropical Cyclones over the Western North Pacific. Part II: The Impact of Midlatitude Circulation Characteristics  

Science Conference Proceedings (OSTI)

Two characteristic midlatitude circulation patterns (labeled northwest and northeast) are found to be associated with extratropical transition (ET) of tropical cyclones over the western North Pacific Ocean. Although in both cases the tropical ...

Patrick A. Harr; Russell L. Elsberry; Timothy F. Hogan

2000-08-01T23:59:59.000Z

426

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

427

Impacts of Ocean–Atmosphere Coupling on Tropical Cyclone Intensity Change and Ocean Prediction in the Australian Region  

Science Conference Proceedings (OSTI)

This study investigates the impact of atmosphere–ocean coupling on predicted tropical cyclone (TC) intensity change and the ocean response in the Australian region. The coupled model comprises the Australian Bureau of Meteorology’s Tropical ...

P. A. Sandery; G. B. Brassington; A. Craig; T. Pugh

2010-06-01T23:59:59.000Z

428

An Observational Study of Tropical Cyclone Spin-Up in Supertyphoon Jangmi (2008) from 24–27 September  

Science Conference Proceedings (OSTI)

An observational study of tropical cyclone intensification is performed using dropsondes, in situ flight-level data, satellite imagery, and ELDORA radar during the spin-up of Tropical Storm Jangmi (2008) in the Western North Pacific. This event ...

Neil T. Sanger; Michael T. Montgomery; Roger K. Smith; Michael M. Bell

429

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

430

Vortex Rossby Waves in a Numerically Simulated Tropical Cyclone. Part I: Overall Structure, Potential Vorticity, and Kinetic Energy Budgets  

Science Conference Proceedings (OSTI)

The asymmetric structure in the inner core of a numerically simulated tropical cyclone is analyzed in this study. The simulated tropical cyclone is found to be highly asymmetric in the inner core. In the mid–lower troposphere, the asymmetry in ...

Yuqing Wang

2002-04-01T23:59:59.000Z

431

Quantifying tropical cyclone cloud cover using Envisat retrievals – an example of a recent severe tropical cyclone, ‘Thane’  

Science Conference Proceedings (OSTI)

The eastern coast of peninsular India routinely receives the onslaught of devastating cyclonic storms. We suggest a novel method involving Envisat retrievals followed by application of the European Space Agency's ESA's Earth Observation Link Stand-Alone ...

Ishan Saini, Pranav Chandramouli, Arkayan Samaddar, Satyajit Ghosh

2013-07-01T23:59:59.000Z

432

Multiseason Lead Forecast of the North Atlantic Power Dissipation Index (PDI) and Accumulated Cyclone Energy (ACE)  

Science Conference Proceedings (OSTI)

By considering the intensity, duration, and frequency of tropical cyclones, the power dissipation index (PDI) and accumulated cyclone energy (ACE) are concise metrics routinely used to assess tropical storm activity. This study focuses on the ...

Gabriele Villarini; Gabriel A. Vecchi

2013-06-01T23:59:59.000Z

433

Oscillation of High-Level Cirrus and Heavy Precipitation around Australian Region Tropical Cyclones  

Science Conference Proceedings (OSTI)

A study of 27 days of three-hourly GMS infrared data for 11 tropical cyclones in the Australian region has revealed that the area of the cirrus canopy executes a marked diurnal oscillation with maximum at +3 h of 0800 LMST Mean Solar Time (LMST) ...

F. A. Lajoie; I. J. Butterworth

1984-03-01T23:59:59.000Z

434

GPS Dropwindsonde and WSR-88D Observations of Tropical Cyclone Vertical Wind Profiles and Their Characteristics  

Science Conference Proceedings (OSTI)

The characteristics of tropical cyclone vertical wind profiles and their associated wind speed peaks below 1.5 km were examined through the use of a large number of GPS dropwindsondes (GPS sondes) and radar-derived velocity–azimuth display (VAD) ...

Ian M. Giammanco; John L. Schroeder; Mark D. Powell

2013-02-01T23:59:59.000Z

435

Processes Influencing Rain-Field Growth and Decay after Tropical Cyclone Landfall in the United States  

Science Conference Proceedings (OSTI)

This study measured rain-field sizes for tropical cyclones (TCs) after U.S. landfall and related changes in size to the diurnal cycle and extratropical transition (ET). For 45 TC landfalls, the spatial properties of the rain fields were calculated ...

Corene J. Matyas

2013-05-01T23:59:59.000Z

436

Numerical Simulation of the Influence of Sea Surface Temperature on Translating Tropical Cyclones  

Science Conference Proceedings (OSTI)

A three-dimensional numerical model with a domain of 3000 km×3000 km and horizontal resolution of 60 km is used to study the influence of sea surface temperature (SST) on the behavior of tropical cyclones translating with mean flows in the ...

Simon W. Chang; Rangarao V. Madala

1980-12-01T23:59:59.000Z

437

Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1  

E-Print Network (OSTI)

Wind Farms in Regions Exposed to Tropical Cyclones Niels-Erik Clausen1 , niels Energy A/S, A.C. Meyers Vænge 9, DK-2450 Copenhagen SV, Denmark, Phone +45 44 80 65 71 3 Tripod Wind 6001 Summary The present paper analyses the design basis of wind farms to be established in regions

438

Verification of TMI-Adjusted Rainfall Analyses of Tropical Cyclones at ECMWF Using TRMM Precipitation Radar  

Science Conference Proceedings (OSTI)

A validation of passive microwave–adjusted rainfall analyses of tropical cyclones using spaceborne radar data is presented. This effort is part of the one-dimensional plus four-dimensional variational (1D+4D-Var) rain assimilation project that is ...

A. Benedetti; P. Lopez; E. Moreau; P. Bauer; V. Venugopal

2005-11-01T23:59:59.000Z

439

Tropical Cyclone Environments over the Northeastern and Northwestern Pacific Based on ERA-15 Analyses  

Science Conference Proceedings (OSTI)

This study uses a 1° × 1° lat–long dataset, extracted from ECMWF reanalyses for the 15-yr period 1979–93 (ERA-15), to composite environmental characteristics and flow features in the vicinity of named tropical cyclones (TCs) in the eastern and ...

Dayton G. Vincent; Andreas H. Fink

2001-08-01T23:59:59.000Z

440

Tropical cyclones and permanent El Nino in the early Pliocene epoch  

E-Print Network (OSTI)

Tropical cyclones (also known as hurricanes and typhoons) are now believed to be an important component of the Earth’s climate system1, 2, 3. In particular, by vigorously mixing the upper ocean, they can affect the ocean’s ...

Fedorov, Alexey V.

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Loss of Life in the United States Associated with Recent Atlantic Tropical Cyclones  

Science Conference Proceedings (OSTI)

A database was established for the period 1970–99 to assess the threat to life in the contiguous United States and adjacent coastal waters from Atlantic tropical cyclones. Freshwater floods caused more than one–half of the 600 U.S. deaths ...

Edward N. Rappaport

2000-09-01T23:59:59.000Z

442

Observed Tropical Cyclone Eye Thermal Anomaly Profiles Extending Above 300 hPa  

Science Conference Proceedings (OSTI)

As recently pointed out by Stern and Nolan (2012), much of our knowledge of the warm core structure of the tropical cyclone eye has come from composites of in situ data taken from multiple aircraft studies of three storms in the late 1950’s and ...

Stephen L. Durden

443

Factors Controlling Multiple Tropical Cyclone Events in the Western North Pacific  

Science Conference Proceedings (OSTI)

The statistical feature of occurrence of multiple tropical cyclone (MTC) events in the western North Pacific (WNP) is examined during summer (June–September) for the period of 1979–2006. The number of MTC events ranged from one to eight per year, ...

Jianyun Gao; Tim Li

2011-03-01T23:59:59.000Z

444

Surface Track Discontinuity of Tropical Cyclones Crossing Taiwan: A Statistical Study  

Science Conference Proceedings (OSTI)

Surface tracks of some cross-Taiwan tropical cyclones were discontinuous as a result of the blockage of the north-northeast–south-southwest-oriented Central Mountain Range (CMR). This paper tries to identify the variables that may be used to ...

L. Peng; S.-T. Wang; S.-L. Shieh; M.-D. Cheng; T.-C. Yeh

2012-01-01T23:59:59.000Z

445

Trends in Tropical Cyclone Impact: A Study in Andhra Pradesh, India  

Science Conference Proceedings (OSTI)

Contrary to the common perception that tropical cyclones are on the increase, due perhaps to global warming, studies all over the world show that, although there are decadal variations, there is no definite long-term trend in the frequency or ...

S. Raghavan; S. Rajesh

2003-05-01T23:59:59.000Z

446

A Climatology of Inland Winds from Tropical Cyclones for the Eastern United States  

Science Conference Proceedings (OSTI)

Tropical cyclones pose a significant threat to life and property along coastal regions of the United States. As these systems move inland and dissipate, they can also pose a threat to life and property, through heavy rains, high winds, and other ...

Michael C. Kruk; Ethan J. Gibney; David H. Levinson; Michael Squires

2010-07-01T23:59:59.000Z

447

Formation of the Philippine Twin Tropical Cyclones during the 2008 Summer Monsoon Onset  

Science Conference Proceedings (OSTI)

Stretched from Indochina, across the South China Sea, to the Philippine Sea, a monsoon cyclonic shear flow was formed by easterlies of the cold surge-like flow in the north and monsoon westerlies in the south before the onset of the tropical ...

Tsing-Chang Chen; Jenq-Dar Tsay; Ming-Cheng Yen; Esperanza O. Cayanan

2010-10-01T23:59:59.000Z

448

The Resonant Excitation of Baroclinic Waves by the Divergent Circulation of Recurving Tropical Cyclones  

Science Conference Proceedings (OSTI)

This paper explores the hypothesis that a tropical cyclone (TC) may produce baroclinic waves through the divergent circulation that arises from its low-level inflow and upper-level outflow. The model setting is a quasigeostrophic (QG) two-layer ...

Daniel Hodyss; Eric Hendricks

2010-11-01T23:59:59.000Z

449

Size of Tropical Cyclones as Inferred from ERS-1 and ERS-2 Data  

Science Conference Proceedings (OSTI)

The sizes of the tropical cyclones (TCs) occurring over the western North Pacific (WNP) and the North Atlantic between 1991 and 1996 are estimated to establish a database for the study of the climatology of TC size and the physical processes ...

K. S. Liu; Johnny C. L. Chan

1999-12-01T23:59:59.000Z

450

Modeling the Effects of Land–Sea Roughness Contrast on Tropical Cyclone Winds  

Science Conference Proceedings (OSTI)

The fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5) is used to simulate tropical cyclone (TC) wind distribution near landfall. On an f plane at 15°N, the effects of the ...

Martin L. M. Wong; Johnny C. L. Chan

2007-09-01T23:59:59.000Z

451

Energy Production, Frictional Dissipation, and Maximum Intensity of a Numerically Simulated Tropical Cyclone  

Science Conference Proceedings (OSTI)

A tropical cyclone (TC) viewed as a heat engine converts heat energy extracted from the ocean into the kinetic energy of the TC, which is eventually dissipated due to surface friction. Since the energy production rate is a linear function while ...

Yuqing Wang; Jing Xu

2010-01-01T23:59:59.000Z

452

On the Vertical Decay Rate of the Maximum Tangential Winds in Tropical Cyclones  

Science Conference Proceedings (OSTI)

In this study, it is shown that the maximum tangential winds within tropical cyclones decrease with height at a percentage rate that is nearly independent of both the maximum wind speed and the radius of maximum winds (RMW). This can be seen by ...

Daniel P. Stern; David S. Nolan

2011-09-01T23:59:59.000Z

453

Impacts of SSM/I Retrieved Rainfall Rates on Numerical Prediction of a Tropical Cyclone  

Science Conference Proceedings (OSTI)

Special Sensor Microwave/Imager (SSM/I) retrieved rainfall rates were assimilated into a limited-area numerical prediction model in an attempt to improve the initial analysis and forecast of a tropical cyclone. Typhoon Flo of 1990, which was ...

Melinda S. Peng; Simon W. Chang

1996-06-01T23:59:59.000Z

454

A Numerical Study of the Effect of a Mountain Range on a Landfalling Tropical Cyclone  

Science Conference Proceedings (OSTI)

A triply-nested, movable mesh model was used to study the effects of a mountain range on a landfalling tropical cyclone embedded in an easterly flow of 10 m s?1. The integration domain consisted of a 37° wide and 45° long channel, with an ...

Morris A. Bender; Robert E. Tuleya; Yoshio Kurihara

1985-04-01T23:59:59.000Z

455

A Numerical Study of the Effect of Island Terrain on Tropical Cyclones  

Science Conference Proceedings (OSTI)

A triply nested, movable mesh model was used to study the behavior of tropical cyclones encountering island mountain ranges. The integration domain consisted of a 37° wide and 45° long channel, with an innermost mesh resolution of 1/6°. The ...

Morris A. Bender; Robert E. Tuleya; Yoshio Kurihara

1987-01-01T23:59:59.000Z

456

What Percentage of Western North Pacific Tropical Cyclones Form within the Monsoon Trough?  

Science Conference Proceedings (OSTI)

It is frequently stated that 70%–80% of western North Pacific tropical cyclones form “within the monsoon trough,” but without an objective definition of the term. Several definitions are tested here. When the monsoon trough (MT) is defined as the ...

John Molinari; David Vollaro

2013-02-01T23:59:59.000Z

457

A Simple Statistical-Synoptic Track Prediction Technique for Western North Pacific Tropical Cyclones  

Science Conference Proceedings (OSTI)

A simple statistical-synoptic technique for tropical cyclone (TC) track forecasting to 72 h in the western North Pacific is derived. This technique applies to the standard (S) pattern/dominant ridge region (S/DR) and poleward/poleward-oriented (P/...

Jeng-Ming Chen; Russell L. Elsberry; Mark A. Boothe; Lester E. Carr III

1999-01-01T23:59:59.000Z

458

Motion and Evolution of Binary Tropical Cyclones in a Coupled Atmosphere–Ocean Numerical Model  

Science Conference Proceedings (OSTI)

The interaction of binary tropical cyclones (TC) is investigated using a coupled TC-ocean movable nested-grid model. The model consists of an eight-layer atmospheric model in the sigma coordinate system and a three-layer primitive equation ocean ...

Alexander I. Falkovich; Alexander P. Khain; Isaac Ginis

1995-05-01T23:59:59.000Z

459

A Numerical Study on Tropical Cyclone Intensification. Part I: Beta Effect and Mean Flow Effect  

Science Conference Proceedings (OSTI)

The effect of planetary vorticity gradient (beta) and the presence of a uniform mean flow on the intensification of tropical cyclones are studied using a limited-area primitive equation model. The most intense storm evolves on a constant-f plane ...

Melinda S. Peng; Bao-Fong Jeng; R. T. Williams

1999-05-01T23:59:59.000Z

460

The Impact of Tropical Cyclones on the Geomorphic Evolution of Bolivar Peninsula, TX  

E-Print Network (OSTI)

Annually, tropical cyclones do tremendous damage and are agents of long-term coastal change. To test this idea of different tropical cyclones delivering consistent coastal change, a landform with such evolution is needed. One such landform is a spit. What contributions do tropical cyclones give toward the evolution of a spit, and do tropical cyclones give the same kinds of impacts? To determine if tropical cyclones have similar impacts, shoreline and volumetric change from four storms impacting Bolivar Peninsula are considered. Being a southwest-trended spit at a length of 33.5 kilometers, storm impacts are measured in the form of one dimensional shoreline and two dimensional volumetric change. These impacts are abstracted into shoreline change and volumetric change patterns. These patterns are identified and compared for differences between each storm and similarity among all storms. Results indicate that shoreline accretionary zones vary alongshore. Results from Hurricane Ike indicate an accretionary zone ten kilometers from the distal end. Shoreline change patterns for Hurricane Rita show an unstable accretionary zone at four kilometers from the distal end. Results for Tropical Storm Fay indicate an unstable accretionary zone that begins at the distal end and continues to the middle of the spit. In terms of similarity for shoreline change, all patterns from storms demonstrated erosion near Rollover Fish Pass. One dimensional volumetric change patterns were entirely erosive for Hurricanes Rita and Ike, and Tropical Storm Fay had by small zones of accretion near the distal portion of the spit. Tropical Storm Josephine demonstrated an accretion zone between the middle and distal portion of the spit. Results from two dimensional volumetric change patterns suggest a threshold for inland penetration. Tropical Storm Fay showed a ten to twenty meter wide pattern of erosion around five kilometers from the distal end and near the proximal end of the spit, and Hurricane Rita demonstrated a twenty meter wide pattern of erosion near the distal end. Hurricane Ike had erosive penetration of up to 200 meters around fifteen kilometers from the distal end. Results suggest that certain storms reinforce the standard spit growth model, and others work against it.

Hales, Billy

2012-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

THE WORLD RECORD STORM SURGE AND THE MOST INTENSE SOUTHERN HEMISPHERE TROPICAL CYCLONE – NEW EVIDENCE AND MODELING  

Science Conference Proceedings (OSTI)

The world record for a storm surge is 13 m occurring during landfall of Tropical Cyclone Mahina in northeast Australia, March 1899. The central pressure of this cyclone has been reported as 914 hPa as measured by ships barometer during passage of the eye. ...

JONATHAN NOTT; CAMILLA GREEN; IAN TOWNSEND; JEFFREY CALLAGHAN

462

The Retrieval of Asymmetric Tropical Cyclone Structures Using Doppler Radar Simulations and Observations with the Extended GBVTD Technique  

Science Conference Proceedings (OSTI)

The ground-based velocity track display (GBVTD) technique is extended to two Doppler radars to retrieve the structure of a tropical cyclone’s (TC’s) circulation. With this extension, it is found that the asymmetric part of the TC radial wind ...

Yu-Chieng Liou; Tai-Chi Chen Wang; Wen-Chau Lee; Ya-Ju Chang

2006-04-01T23:59:59.000Z

463

Tropical Cyclone Initialization with a Spherical High-Order Filter and an Idealized Three-Dimensional Bogus Vortex  

Science Conference Proceedings (OSTI)

A tropical cyclone initialization method with an idealized three-dimensional bogus vortex of an analytic empirical formula is presented for the track and intensity prediction. The procedure in the new method consists of four steps: the separation ...

In-Hyuk Kwon; Hyeong-Bin Cheong

2010-04-01T23:59:59.000Z

464

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

465

Some Large-Scale Characteristics Associated with Tropical Cyclone Development in the North Indian Ocean during FGGE  

Science Conference Proceedings (OSTI)

This paper discusses the meteorological conditions associated with tropical cyclone formation in the north Indian Ocean during the 1979 FGGE year. Seven developing systems are composited together using FUGE Ill-b analyses to show the common ...

Cheng-Shang Lee; Roger Edson; William M. Gray

1989-02-01T23:59:59.000Z

466

The Transformation of Tropical Storm Agnes into an Extratropical Cyclone. Part II: Moisture, Vorticity and Kinetic Energy Budgets  

Science Conference Proceedings (OSTI)

Moisture, vorticity and kinetic energy budgets are constructed to diagnose the transformation of tropical storm Agnes (June 1972) into an extratropical cyclone in this second of two papers on Agnes. The vertical motions and divergent wind ...

Geoffrey J. DiMego; Lance F. Bosart

1982-05-01T23:59:59.000Z

467

The Effect of Wind–Wave–Current Interaction on Air–Sea Momentum Fluxes and Ocean Response in Tropical Cyclones  

Science Conference Proceedings (OSTI)

In this paper, the wind–wave–current interaction mechanisms in tropical cyclones and their effect on the surface wave and ocean responses are investigated through a set of numerical experiments. The key element of the authors’ modeling approach ...

Yalin Fan; Isaac Ginis; Tetsu Hara

2009-04-01T23:59:59.000Z

468

Contributions of ENSO and East Indian Ocean SSTA to the Interannual Variability of Northwest Pacific Tropical Cyclone Frequency  

Science Conference Proceedings (OSTI)

This study attempts to understand contributions of ENSO and the boreal summer sea surface temperature anomaly (SSTA) in the East Indian Ocean (EIO) to the interannual variability of tropical cyclone (TC) frequency over the western North Pacific (...

Ruifen Zhan; Yuqing Wang; Xiaotu Lei

2011-01-01T23:59:59.000Z

469

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

470

Observing Strategy and Observation Targeting for Tropical Cyclones Using Ensemble-Based Sensitivity Analysis and Data Assimilation  

Science Conference Proceedings (OSTI)

An ensemble Kalman filter data assimilation system for the Weather Research and Forecasting Model is used with ensemble-based sensitivity analysis to explore observing strategies and observation targeting for tropical cyclones. The case selected ...

Baoguo Xie; Fuqing Zhang; Qinghong Zhang; Jonathan Poterjoy; Yonghui Weng

2013-05-01T23:59:59.000Z

471

Effects of Tropical Cyclones on Ocean Heat Transport in a High-Resolution Coupled General Circulation Model  

Science Conference Proceedings (OSTI)

In this paper the interplay between tropical cyclones (TCs) and the Northern Hemispheric ocean heat transport (OHT) is investigated. In particular, results from a numerical simulation of the twentieth-century and twenty-first-century climates, ...

Enrico Scoccimarro; Silvio Gualdi; Alessio Bellucci; Antonella Sanna; Pier Giuseppe Fogli; Elisa Manzini; Marcello Vichi; Paolo Oddo; Antonio Navarra

2011-08-01T23:59:59.000Z

472

Satellite-Based Tropical Cyclone Intensity Estimation Using the NOAA-KLM Series Advanced Microwave Sounding Unit (AMSU)  

Science Conference Proceedings (OSTI)

Satellite-borne passive microwave radiometers, such as the Advanced Microwave Sounding Unit (AMSU) on the NOAA polar-orbiting series, are well suited to monitor tropical cyclones (TCs) by virtue of their ability to assess changes in tropospheric ...

Kurt F. Brueske; Christopher S. Velden

2003-04-01T23:59:59.000Z

473

Satellite Classifications of Atlantic Tropical and Subtropical Cyclones: A Review of Eight Years of Classifications at Miami  

Science Conference Proceedings (OSTI)

Estimates of the locations and maximum sustained wind speeds of all tropical and subtropical cyclones in the North Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico have been made at Miami since 1971 using satellite techniques developed by ...

D. C. Gaby; J. B. Lushine; B. M. Mayfield; S. C. Pearce; F. E. Torres

1980-05-01T23:59:59.000Z

474

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

475

A Study on the Synoptic-Dynamical Characteristics of Compact Tropical Cyclones in the Western North Pacific  

Science Conference Proceedings (OSTI)

This study focuses on the synoptic and dynamical characteristic of compact and incompact tropical cyclones (TCs) in the western North Pacific. To identify the distinct mechanisms related to the development and maintenance of these two categories ...

Delia Yen-Chu Chen; Kevin K. W. Cheung; Cheng-Shang Lee

2012-12-01T23:59:59.000Z

476

An Air–Sea Interaction Theory for Tropical Cyclones. Part II: Evolutionary Study Using a Nonhydrostatic Axisymmetric Numerical Model  

Science Conference Proceedings (OSTI)

In Part I of this study an analytical model for a steady-state tropical cyclone is constructed on the assumption that boundary-layer air parcels are conditionally neutral to displacements along the angular momentum surfaces of the hurricane ...

Richard Rotunno; Kerry A. Emanuel

1987-02-01T23:59:59.000Z

477

A Numerical Exploration of the Sensitivity of Tropical Cyclone Rainfall Intensity to Sea Surf@ace Temperature  

Science Conference Proceedings (OSTI)

It is commonly accepted that there is a monotonically increasing relationship between sea surface temperature (SST) and tropical cyclone intensity (as measured by maximum near-surface winds or minimum central pressure). This perceived ...

Jenni L. Evans; Brian F. Ryan; John L. McGregor

1994-04-01T23:59:59.000Z

478

An Example of the Value of Strong Climatological Signals in Tropical Cyclone Track Forecasting: Hurricane Ivan (2004)  

Science Conference Proceedings (OSTI)

Since 1970, tropical cyclone (TC) track forecasts have improved steadily in the Atlantic basin. This improvement has been linked primarily to advances in numerical weather prediction (NWP) models. Concurrently, with few exceptions, the ...

Bradford S. Barrett; Lance M. Leslie; Brian H. Fiedler

2006-05-01T23:59:59.000Z

479

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

480

Interaction of an Asymmetric Double Vortex and Trochoidal Motion of a Tropical Cyclone with the Concentric Eyewall Structure  

Science Conference Proceedings (OSTI)

Radar echo images demonstrate that mature tropical cyclones frequently have a concentric eyewall structure, which consists of the inner eyewall, echo-free moat, and outer eyewall regions. Near the inner and outer eyewalls, well-defined wind ...

Masahito Oda; Mikio Nakanishi; Gen’ichi Naito

2006-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tropical cyclone activity" 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

Tropical cyclone identification and tracking system using integrated neural oscillatory elastic graph matching and hybrid RBF network track mining techniques  

Science Conference Proceedings (OSTI)

We present an automatic and integrated neural network-based tropical cyclone (TC) identification and track mining system. The proposed system consists of two main modules: 1) TC pattern identification system using neural oscillatory elastic graph matching ...

R. S.T. Lee; J. N.K. Liu

2000-05-01T23:59:59.000Z

482

How Does the Eye Warm? Part I: A Potential Temperature Budget Analysis of an Idealized Tropical Cyclone  

Science Conference Proceedings (OSTI)

In this first part of a two-part study, the mechanisms that accomplish the warming in the eye of tropical cyclones are investigated through a potential temperature budget analysis of an idealized simulation. The spatial structure of warming varies ...

Daniel P. Stern; Fuqing Zhang

2013-01-01T23:59:59.000Z

483

GPCE-AX: An Anisotropic Extension to the Goerss Predicted Consensus Error in Tropical Cyclone Track Forecasts  

Science Conference Proceedings (OSTI)

A method to predict an anisotropic expected forecast error distribution for consensus forecasts of tropical cyclone (TC) tracks is presented. The method builds upon the Goerss predicted consensus error (GPCE), which predicts the isotropic radius ...

James A. Hansen; James S. Goerss; Charles Sampson

2011-06-01T23:59:59.000Z

484

Wavelet Support Vector Machines for Forecasting Precipitation in Tropical Cyclones: Comparisons with GSVM, Regression, and MM5  

Science Conference Proceedings (OSTI)

This study presents two support vector machine (SVM) based models for forecasting hourly precipitation during tropical cyclone (typhoon) events. The two SVM-based models are the traditional Gaussian kernel SVMs (GSVMs) and the advanced wavelet ...

Chih-Chiang Wei

2012-04-01T23:59:59.000Z

485

Analysis of Idealized Tropical Cyclone Simulations Using the Weather Research and Forecasting Model: Sensitivity to Turbulence Parameterization and Grid Spacing  

Science Conference Proceedings (OSTI)

The Weather Research and Forecasting Advanced Research Model (WRF-ARW) was used to perform idealized tropical cyclone (TC) simulations, with domains of 36-, 12-, and 4-km horizontal grid spacing. Tests were conducted to determine the sensitivity ...

Kevin A. Hill; Gary M. Lackmann

2009-02-01T23:59:59.000Z

486

The Resonant Interaction of a Tropical Cyclone and a Tropopause Front in a Barotropic Model. Part I: Zonally Oriented Front  

Science Conference Proceedings (OSTI)

The interaction of a tropical cyclone and a zonally aligned tropopause front is investigated in an idealized framework. A nondivergent barotropic model is used in which the front is represented by a vorticity step, giving a jetlike velocity ...

Leonhard Scheck; Sarah C. Jones; Martin Juckes

2011-03-01T23:59:59.000Z

487

A Three-Dimensional Barotropic Model of the Response of the Australian North West Shelf to Tropical Cyclones  

Science Conference Proceedings (OSTI)

A three-dimensional barotropic model using a -coordinate or depth transformation, and forced with tropical cyclone wind and atmospheric pressure fields has been applied to the continental shelf and slope regions of the Australian North West ...

C. J. Hearn; P. E. Holloway

1990-01-01T23:59:59.000Z

488

The Impact of Gradient Wind Imbalance on Potential Intensity of Tropical Cyclones in an Unbalanced Slab Boundary Layer Model  

Science Conference Proceedings (OSTI)

The assumption of gradient wind balance is customarily made so as to derive the theoretical upper-bound intensity of a mature tropical cyclone. Emanuel's theory of hurricane potential intensity (E-PI) makes use of this assumption, whereas more ...

Thomas Frisius; Daria Schönemann; Jonathan Vigh

2013-07-01T23:59:59.000Z

489

Sensitivity in the Overland Reintensification of Tropical Cyclone Erin (2007) to Near-Surface Soil Moisture Characteristics  

Science Conference Proceedings (OSTI)

This study investigates the impact of abnormally moist soil conditions across the southern Great Plains upon the overland reintensification of North Atlantic Tropical Cyclone Erin (2007). This is tested by analyzing the contributions of three soil ...

Clark Evans; Russ S. Schumacher; Thomas J. Galarneau Jr.

2011-12-01T23:59:59.000Z

490

Development and Tropical Transition of an Alpine Lee Cyclone. Part I: Case Analysis and Evaluation of Numerical Guidance  

Science Conference Proceedings (OSTI)

The development and tropical transition (TT) of a subsynoptic-scale cyclone in the Gulf of Genoa during the Mesoscale Alpine Project (MAP) demonstration of probabilistic hydrological and atmospheric simulation of flood events in the alpine region ...

Ron McTaggart-Cowan; Thomas J. Galarneau Jr.; Lance F. Bosart; Jason A. Milbrandt

2010-06-01T23:59:59.000Z

491

Determination of a Consistent Time for the Extratropical Transition of Tropical Cyclones. Part II: Potential Vorticity Metrics  

Science Conference Proceedings (OSTI)

As a tropical cyclone moves poleward and interacts with the midlatitude circulation, the question of whether it will undergo extratropical transition (ET) and, if it does, whether it will reintensify or dissipate, is a complex problem. ...

David E. Kofron; Elizabeth A. Ritchie; J. Scott Tyo

2010-12-01T23:59:59.000Z

492

Extratropical Transition of Western North Pacific Tropical Cyclones: An Overview and Conceptual Model of the Transformation Stage  

Science Conference Proceedings (OSTI)

Extratropical transition (ET) in the western North Pacific is defined here in terms of two stages: transformation, in which the tropical cyclone evolves into a baroclinic storm; and reintensification, where the transformed storm then deepens as ...

Peter M. Klein; Patrick A. Harr; Russell L. Elsberry

2000-08-01T23:59:59.000Z

493

Tropical Cyclone Formations over the Western North Pacific in the Navy Operational Global Atmospheric Prediction System Forecasts  

Science Conference Proceedings (OSTI)

A set of criteria is developed to identify tropical cyclone (TC) formations in the Navy Operational Global Atmospheric Prediction System (NOGAPS) analyses and forecast fields. Then the NOGAPS forecasts of TC formations from 1997 to 1999 are ...

Kevin K. W. Cheung; Russell L. Elsberry

2002-08-01T23:59:59.000Z

494

The Advanced Dvorak Technique: Continued Development of an Objective Scheme to Estimate Tropical Cyclone Intensity Using Geostationary Infrared Satellite Imagery  

Science Conference Proceedings (OSTI)

Tropical cyclones are becoming an increasing menace to society as populations grow in coastal regions. Forecasting the intensity of these often-temperamental weather systems can be a real challenge, especially if the true intensity at the ...

Timothy L. Olander; Christopher S. Velden

2007-04-01T23:59:59.000Z

495

An Evaluation of Microphysics Fields from Mesoscale Model Simulations of Tropical Cyclones. Part I: Comparisons with Observations  

Science Conference Proceedings (OSTI)

This study presents a framework for comparing hydrometeor and vertical velocity fields from mesoscale model simulations of tropical cyclones with observations of these fields from a variety of platforms. The framework is based on the Yuter and ...

Robert F. Rogers; Michael L. Black; Shuyi S. Chen; Robert A. Black

2007-06-01T23:59:59.000Z

496

Response of Tropical Cyclone Potential Intensity to a Global Warming Scenario in the IPCC AR4 CGCMs  

Science Conference Proceedings (OSTI)

This paper reports on an analysis of the tropical cyclone (TC) potential intensity (PI) and its control parameters in transient global warming simulations. Specifically, the TC PI is calculated for phase 3 of the Coupled Model Intercomparison ...

Jinhua Yu; Yuqing Wang; Kevin Hamilton

2010-03-01T23:59:59.000Z

497

Analytical and Numerical Studies of the Beta-Effect in Tropical Cyclone Motion. Part I: Zero Mean Flow  

Science Conference Proceedings (OSTI)

The ?-effect on tropical cyclone motion is studied using an analytical as well as a numerical model in a nondivergent barotropic framework. The analytical model and the linear version of the numerical model give essentially the same result: the ...

Johnny C. L. Chan; R. T. Williams

1987-05-01T23:59:59.000Z

498

Predictors of Tropical Cyclone Numbers and Extreme Hurricane Intensities over the North Atlantic Using Generalized Additive and Linear Models  

Science Conference Proceedings (OSTI)

Fluctuations of the annual number of tropical cyclones over the North Atlantic and of the energy dissipated by the most intense hurricane of a season are related to a variety of predictors [global temperature, SST and detrended SST, North ...

Olivier Mestre; Stéphane Hallegatte

2009-02-01T23:59:59.000Z

499

Observations and Forecasts from the Landfall of Tropical Cyclones John, Lane, and Paul (2006) over Northwestern Mexico  

Science Conference Proceedings (OSTI)

This study focuses on track and intensity changes of three tropical cyclones that, during the season of 2006, developed in the eastern North Pacific basin and made landfall over northwestern Mexico. Observational datasets, including satellite and ...

Luis M. Farfán; Rosario Romero-Centeno; G. B. Raga

2012-12-01T23:59:59.000Z

500

Changes in number and intensity of world-wide tropical cyclones  

E-Print Network (OSTI)

Bayesian statistical models were developed for the number of tropical cyclones and the rate at which these cyclones became hurricanes in the North Atlantic, North and South Indian, and East and West Pacific Oceans. We find that there is small probability that the number of cyclones has increased in the past thirty years. The rate at which these storms become hurricanes appears to be constant. The rate at which hurricanes evolve into category 4 and higher major storms does appear to have increased. We also investigate storm intensity by measuring the distribution of individual storm lifetime in days, storm track length, and Emanuel's power dissiptation index. We find little evidence that, overall, the mean of the distribution of individual storm intensity is changing through time, but the variability of the distribution has increased. The cold tongue index and the North Atlantic oscillation index were found to be strongly associated with storm quality in the Western, and to a smaller extent, the Eastern Pacifi...

Briggs, W M

2007-01-01T23:59:59.000Z