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Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

TRENDS: Global and Hemispheric Temperature Anomalies  

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

Global and Hemispheric Temperature Anomalies - Land and Marine Instrumental Records graphics Graphics data Data Investigators P. D. Jones1, D. E. Parker2, T. J. Osborn1, and K. R....

2

Time Series Graphs of Global and Hemispheric Temperature Anomalies...  

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

Time Series Graphs of Global and Hemispheric Temperature Anomalies graphics Graph - Global and Hemispheric Annual Temperature Anomalies, 1850-2012 graphics Graph - Northern...

3

Some Considerations Relevant to Computing Average Hemispheric Temperature Anomalies  

Science Conference Proceedings (OSTI)

Three data bases of gridded surface temperature anomalies were used to assess the sensitivity of the average estimated Northern Hemisphere (NH) temperature anomaly to: 1) extreme gridpoint values and 2) zonal band contributions. Over the last 100 ...

S. L. Grotch

1987-07-01T23:59:59.000Z

4

Relationships between Low-Frequency Variability in the Southern Hemisphere and Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Long-term trends and interannual variations of circulation anomalies in the Southern Hemisphere are examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research reanalysis from 1949 to 1998. The ...

Kingtse C. Mo

2000-10-01T23:59:59.000Z

5

TRENDS: Jones et al. Temperature Anomalies  

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

Data Tables of Global and Hemispheric Temperature Anomalies data Table - Global Monthly and Annual Temperature Anomalies, 1850-2012. data Table - Northern Hemisphere Monthly and...

6

Meridional and Downward Propagation of Atmospheric Circulation Anomalies. Part II: Southern Hemisphere Cold Season Variability  

Science Conference Proceedings (OSTI)

As in the Northern Hemisphere, there exists a simultaneous poleward propagation of temperature anomalies in the stratosphere and equatorward propagation in the troposphere in the Southern Hemisphere’s cold season. It takes about 110 days for ...

R-C. Ren; Ming Cai

2008-07-01T23:59:59.000Z

7

Hemispheric Anomalies of 700 mb Height Related to Mean Temperature for Fall, Winter and Spring in the United States  

Science Conference Proceedings (OSTI)

Zonally averaged composite anomalies of 700 mb height for years preceding and during four warm winters in the contiguous United States show generally positive anomalies over subtropical and middle latitudes and generally negative anomalies over ...

Carl O. Erickson

1984-03-01T23:59:59.000Z

8

Persistent Anomalies of the Extratropical Northern Hemisphere Wintertime Circulation: Geographical Distribution and Regional Persistence Characteristics  

Science Conference Proceedings (OSTI)

We have studied the geographical and regional persistence characteristics of wintertime Northern Hemisphere 500 mb height anomalies, focusing particular attention on the behavior of strong anomalies that persist beyond the durations associated ...

Randall M. Dole; Neil D. Gordon

1983-08-01T23:59:59.000Z

9

Hemispheric Surface Air Temperature Variations: A Reanalysis and an Update to 1993  

Science Conference Proceedings (OSTI)

Land-based compilations of gridded monthly surface air temperature anomalies, averaged into hemispheric values for the last 140 years, have been available for climatological analyses for the last 10 years or so. The analysis techniques used in ...

P. D. Jones

1994-11-01T23:59:59.000Z

10

Forecasting Northern Hemisphere 700-mb Geopotential Height Anomalies Using Empirical Normal Modes  

Science Conference Proceedings (OSTI)

Multivariate linear prediction based on single-lag inverse modeling is developed further and critically examined. The method is applied to the National Meteorological Center analyses of Northern Hemisphere 700-mb geopotential height anomalies, ...

Cécile Penland; Michael Ghil

1993-08-01T23:59:59.000Z

11

Statistical relationships between the surface air temperature anomalies and the solar and geomagnetic activity indices  

E-Print Network (OSTI)

Statistical analysis of the data series from 1856 to 2000 for the annual global and hemispheric surface air temperature anomalies is completed. Statistically significant correlations are found between global and hemispheric temperature anomalies and solar and geomagnetic indices. The temperature anomalies in the Northern and Southern hemispheres show similar statistical relations with the solar and geomagnetic indices. The cross-correlation analysis shows no statistically significant global temperature lag behind the sunspots as well as behind aa-indices. The correlation between the temperature anomalies and the geomagnetic indices is about two times higher than the correlation between the temperature anomalies and the solar indices. These results support the suggestion that the geomagnetic forcing predominates over the solar activity forcing on the global and hemispheric surface air temperatures.

Valev, Dimitar

2010-01-01T23:59:59.000Z

12

Large Amplitude Flow Anomalies in Northern Hemisphere Midlatitudes  

Science Conference Proceedings (OSTI)

The composite of large amplitude flow anomalies identified from extremely large amplitudes of the planetary-scale waves is examined in terms of the temporal and spatial evolution of both the large-scale flow and the storm tracks. The ...

Anthony R. Hansen; Alfonso Sutera

1995-06-01T23:59:59.000Z

13

Model Experiments on the Impact of Pacific Sea Surface Temperature Anomalies on Blocking Frequency  

Science Conference Proceedings (OSTI)

Sensitivity experiments with a perpetual January version of a low-resolution general circulation model are conducted to investigate the influence of Pacific sea surface temperature (SST) anomalies on blocking in the Northern Hemisphere. Six 1200-...

Steven L. Mullen

1989-09-01T23:59:59.000Z

14

The Impact of Sea Surface Temperature Anomalies on the Rainfall over Northeast Brazil  

Science Conference Proceedings (OSTI)

The response of the tropical atmosphere to the sea surface temperature (SST) anomalies in the Northern Hemisphere spring of 1984 is investigated. The methodology for investigation consists of comparing simulations with and without the global ...

Carlos R. Mechoso; Steven W. Lyons; Joseph A. Spahr

1990-08-01T23:59:59.000Z

15

Seasonality in the Local and Remote Atmospheric Response to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Two apparently contradictory situations are provided by observations of the atmospheric response to sea surface temperature anomalies. These are: (i) The extratropical regions of the winter hemisphere appear to possess strong teleconnections with ...

Peter J. Webster

1982-01-01T23:59:59.000Z

16

Defining and Estimating Global Mean Temperature Anomalies  

Science Conference Proceedings (OSTI)

Methods used to quantify temperature changes of the earth must he assessed relative to an appropriate definition of global mean temperature. In this paper, global mean temperature is defined and the adequacy of using weighted average anomalies to ...

Richard F. Gunst; Sabyasachi Basu; Robert Brunell

1993-07-01T23:59:59.000Z

17

Analysis of the GISS GCM Response to a Subtropical Sea Surface Temperature Anomaly Using a Linear Model  

Science Conference Proceedings (OSTI)

The GISS general circulation model (GCM) is used to investigate the influence of a positive sea surface temperature (SST) anomaly in the subtropical North Pacific on the Northern Hemisphere wintertime circulation. As the set of model data is ...

Claude Frankignoul; Antoine Molin

1988-12-01T23:59:59.000Z

18

Northern Hemisphere Surface Air Temperature Variations: 1851–1984  

Science Conference Proceedings (OSTI)

A new compilation of monthly mean surface air temperature for the Northern Hemisphere for 1851–1984 is presented based on land-based meteorological station data and fixed-position weather ship data. This compilation differs from others in two ...

P. D. Jones; S. C. B. Raper; R. S. Bradley; H. F. Diaz; P. M. Kellyo; T. M. L. Wigley

1986-02-01T23:59:59.000Z

19

Southern Hemisphere Surface Air Temperature Variations: 1851–1984  

Science Conference Proceedings (OSTI)

A new compilation of monthly mean surface air temperature data for the Southern Hemisphere for 1851–1984 is presented based on land-based meteorological station data. Where possible, the station data used in the analysis have been assessed for ...

P. D. Jones; S. C. B. Raper; T. M. L. Wigley

1986-09-01T23:59:59.000Z

20

Decadal-Scale Temperature Trends in the Southern Hemisphere Ocean  

Science Conference Proceedings (OSTI)

Long-term trends in the heat content of the Southern Hemisphere ocean are evaluated by comparing temperature profiles collected during the 1990s with profiles collected starting in the 1930s. Data are drawn both from ship-based hydrographic ...

Sarah T. Gille

2008-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

An updated global grid point surface air temperature anomaly data set: 1851--1990  

Science Conference Proceedings (OSTI)

This document presents land-based monthly surface air temperature anomalies (departures from a 1951--1970 reference period mean) on a 5{degree} latitude by 10{degree} longitude global grid. Monthly surface air temperature anomalies (departures from a 1957--1975 reference period mean) for the Antarctic (grid points from 65{degree}S to 85{degree}S) are presented in a similar way as a separate data set. The data were derived primarily from the World Weather Records and the archives of the United Kingdom Meteorological Office. This long-term record of temperature anomalies may be used in studies addressing possible greenhouse-gas-induced climate changes. To date, the data have been employed in generating regional, hemispheric, and global time series for determining whether recent (i.e., post-1900) warming trends have taken place. This document also presents the monthly mean temperature records for the individual stations that were used to generate the set of gridded anomalies. The periods of record vary by station. Northern Hemisphere station data have been corrected for inhomogeneities, while Southern Hemisphere data are presented in uncorrected form. 14 refs., 11 figs., 10 tabs.

Sepanski, R.J.; Boden, T.A.; Daniels, R.C.

1991-10-01T23:59:59.000Z

22

Detection of Surface Temperature Anomalies in the Coso Geothermal...  

Open Energy Info (EERE)

of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference...

23

Global, Hemispheric, and Zonal Temperature Deviations (CDIAC) - Angell  

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

Global, Hemispheric, and Zonal Temperature Deviations Derived From a 63-Station Radiosonde Network Graph graphic Graphics Data graphic Data Investigator J. K. Angell National Oceanic and Atmospheric Administration, Air Resources Laboratory (R/E/AR), SSMC3, Station 3459, 1315 East West Highway, Silver Spring, Maryland 20910, U.S.A. About Jim Angell: From the Bulletin of the American Meteorological Society (2005) - Jim Angell's Contributions to Meteorology DOI 10.3334/CDIAC/cli.005 Period of Record 1958-2010 (relative to a 1958-1977 average) Special Note Nine tropical radiosonde stations in this 63-station network were identified as anomalous in Angell (2003). Upon removal of these nine stations, the resulting 54-station network, also presented on the CDIAC website, results in significant differences in many of the times series and

24

Detection of Surface Temperature Anomalies in the Coso Geothermal Field  

Open Energy Info (EERE)

Detection of Surface Temperature Anomalies in the Coso Geothermal Field Detection of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Detection of Surface Temperature Anomalies in the Coso Geothermal Field Using Thermal Infrared Remote Sensing Details Activities (1) Areas (1) Regions (0) Abstract: We use thermal infrared (TIR) data from the spaceborne ASTER instrument to detect surface temperature anomalies in the Coso geothermal field in eastern California. The identification of such anomalies in a known geothermal area serves as an incentive to apply similar markers and techniques to areas of unknown geothermal potential. We carried out field measurements concurrently with the collection of ASTER images. The field

25

Anomalies of Central England Temperature Classified by Air Source  

Science Conference Proceedings (OSTI)

Daily anomalies of mean central England temperature (CET), relative to daily 1961–90 climatology, are analyzed in terms of the source of the air estimated from fields of mean sea level pressure. The average CET anomaly for a given source and ...

David E. Parker

2009-03-01T23:59:59.000Z

26

Diagnosis of Extended Cold-Season Temperature Anomalies in Alaska  

Science Conference Proceedings (OSTI)

During the early winter of 2002 and late winter of 2007, the Alaskan sector of the North Pacific Ocean region experienced record-breaking temperature anomalies. The duration of these episodes was unusually long, with each lasting more than 1 ...

Martha Shulski; John Walsh; Eric Stevens; Richard Thoman

2010-02-01T23:59:59.000Z

27

Global Annual Temperature Anomalies from Land and Ocean Observations...  

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

Temperature Anomalies from Land and Ocean Observations, 1880-2012 image data Data Graphics Graphics Reference Hansen, J.E., R. Ruedy, M. Sato, and K. Lo. 2013. NASA GISS...

28

Mechanisms Determining the Atmospheric Response to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A simple model is used to study the mechanisms which control the local and remote (teleconnection) response of the atmosphere to the thermal forcing resulting from sea surface temperature (SST) anomalies located at various latitudes. The model ...

Peter J. Webster

1981-03-01T23:59:59.000Z

29

Patterns of Interannual Variability in the Northern Hemisphere Wintertime 850 mb Temperature Field  

Science Conference Proceedings (OSTI)

Interannual fluctuations of observed winter seasonal mean 850 mb temperatures over the Northern Hemisphere during 1958–73 are documented and compared with midtropospheric height variations. Interannual temperature variance maxima are found over ...

David S. Gutzler; Richard D. Rosen; David A. Salstein; JoséP. Peixoto

1988-10-01T23:59:59.000Z

30

On the Origin of the Surface Air Temperature Difference between the Hemispheres in Earth's Present-Day Climate  

Science Conference Proceedings (OSTI)

In today's climate, the annually averaged surface air temperature in the Northern Hemisphere (NH) is 1°–2°C higher than in the Southern Hemisphere (SH). Historically, this interhemispheric temperature difference has been attributed to a number of ...

Georg Feulner; Stefan Rahmstorf; Anders Levermann; Silvia Volkwardt

2013-09-01T23:59:59.000Z

31

Variations in Surface Air Temperatures: Part 1. Northern Hemisphere, 1881–1980  

Science Conference Proceedings (OSTI)

We have produced, using objective techniques, a long-term series of average Northern Hemisphere temperatures based on monthly mean station data gridded on a 5° latitude by 10° longitude grid. Difficulties in the estimation of this parameter are ...

P. D. Jones; T. M. L. Wigley; P. M. Kelly

1982-02-01T23:59:59.000Z

32

NASA GISS Surface Temperature (GISTEMP) Analysis: Graphics  

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

Temperature Analysis Graphs NASA GISS Surface Temperature (GISTEMP) Analysis: Graphics Time Series Graphs of Global, Hemispheric, and Zonal Temperature Anomalies Graphics...

33

Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global  

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

Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global Tropospheric and Lower Stratospheric Temperature Anomalies Based on Global Radiosonde Network Data DOI: 10.3334/CDIAC/cli.004 data Data image Graphics Investigators Alexander M. Sterin Russian Research Institute for Hydrometeorological Information-World Data Center (RIHMI-WDC), 6, Korolyov str., Obninsk, Kaluga region, Russia, 249035 Period of Record January, 1958 - September, 2005 (relative to the average for 1961-1975). Methods The observed radiosonde data from the Comprehensive Aerological Reference Data Set (CARDS) (Eskridge et al. 1995) were taken as the primary input for obtaining the series. These data were for the global radiosonde observational network through 2001. Since 2002, the AEROSTAB data (uper-air observations obtained through communication channels), collected at

34

Global and Hemispheric Temperature Trends: Uncertainties Related to Inadequate Spatial Sampling  

Science Conference Proceedings (OSTI)

Long-term (50 to 100 years) and short-term (10 to 30 years) global and hemispheric trends of temperature have an inherent unknown error due to incomplete and nonrandom spatial sampling. A number of experiments have been conducted to help quantify ...

Thomas R. Karl; Richard W. Knight; John R. Christy

1994-07-01T23:59:59.000Z

35

The Effect of Urban Warming on the Northern Hemisphere Temperature Average  

Science Conference Proceedings (OSTI)

The significance of the urban warming effect on large-scale and hemispheric mean temperature series is assessed using estimates of the urbanization bias for stations in the United States produced by Karl et al. It is concluded that the Northern ...

P. D. Jones; P. M. Kelly; C. M. Goodess; T. Karl

1989-03-01T23:59:59.000Z

36

Numerical Simulation of the Atmospheric Response to Equatorial Pacific Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A number of recent observational and theoretical studies indicate that under certain conditions tropical sea surface temperature anomalies may be capable of producing climatic anomalies at extratropical latitudes. According to the hypothesis put ...

J. Shukla; J. M. Wallace

1983-07-01T23:59:59.000Z

37

joint Spatiotemporal Modes of Surface Temperature and Sea Level Pressure Variability in the Northern Hemisphere during the Last Century  

Science Conference Proceedings (OSTI)

Coherent spatiotemporal modes of climatic variability are isolated based on a multivariate frequency domain singular value decomposition (SVD) of nearly a century of monthly Northern Hemisphere sea level pressure (SLP) and surface temperature ...

Michael E. Mann; Jeffrey Park

1996-09-01T23:59:59.000Z

38

Variability of the Southern Hemisphere Winter Split Flow—A Case of Two-Way Reinforcement between Mean Flow and Eddy Anomalies  

Science Conference Proceedings (OSTI)

A new split-jet index is defined in this study, and composites based on this index show that the split-flow regime is characterized by a cold–warm–cold tripolar temperature anomaly in the South Pacific that extends equatorward from the Southern ...

Xiaosong Yang; Edmund K. M. Chang

2006-02-01T23:59:59.000Z

39

The Statistical Connection between Tropospheric and Stratospheric Circulation of the Northern Hemisphere in Winter  

Science Conference Proceedings (OSTI)

The associated anomaly patterns of the stratospheric geopotential height field and the tropospheric geopetential and temperature height fields of the Northern Hemisphere are determined applying the canonical correlation analysis. With this linear ...

Judith Perlwitz; Hans-F. Graf

1995-10-01T23:59:59.000Z

40

Hemispheric and Large-Scale Surface Air Temperature Variations: An Extensive Revision and an Update to 2001  

Science Conference Proceedings (OSTI)

This study is an extensive revision of the Climatic Research Unit (CRU) land station temperature database that is used to produce a gridbox dataset of 5° latitude × 5° longitude temperature anomalies. The new database comprises 5159 station ...

P. D. Jones; A. Moberg

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Solar Flare Intermittency and the Earth's Temperature Anomalies Nicola Scafetta1,2  

E-Print Network (OSTI)

Solar Flare Intermittency and the Earth's Temperature Anomalies Nicola Scafetta1,2 and Bruce J; published 17 June 2003) We argue that Earth's short-term temperature anomalies and the solar flare data sets that corresponds to the one that would be induced by the solar flare intermittency. The mean

Scafetta, Nicola

42

Scaling Analysis of the Sea Surface Temperature Anomaly in the South China Sea  

Science Conference Proceedings (OSTI)

Based on the data of optimum interpolation sea surface temperature (OISST), the temporal correlations of the sea surface temperature anomaly (SSTA) in the South China Sea (SCS) are studied by using the rescaled range analysis (R/S) and detrended ...

Zijun Gan; Youfang Yan; Yiquan Qi

2007-04-01T23:59:59.000Z

43

Changes of Snow Cover, Temperature, and Radiative Heat Balance over the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Contemporary large-scale changes in satellite-derived snow cover were examined over the Northern Hemisphere extratropical land (NEL) areas. These areas encompass 55% of the land in the Northern Hemisphere. Snow cover (S) transient regions, the “...

Pavel Ya Groisman; Thomas R. Karl; Richard W. Knight; Georgiy L. Stenchikov

1994-11-01T23:59:59.000Z

44

Estimation of Subsurface Temperature Anomaly in the North Atlantic Using a Self-Organizing Map Neural Network  

Science Conference Proceedings (OSTI)

A self-organizing map (SOM) neural network was developed from Argo gridded datasets in order to estimate a subsurface temperature anomaly (STA) from remote sensing data. The SOM maps were trained using anomalies of sea surface temperature (SST), ...

Xiangbai Wu; Xiao-Hai Yan; Young-Heon Jo; W. Timothy Liu

2012-11-01T23:59:59.000Z

45

Improving SST Anomaly Simulations in a Layer Ocean Model with an Embedded Entrainment Temperature Submodel  

Science Conference Proceedings (OSTI)

In this study, an improved sea surface temperature (SST) anomaly (SSTA) solution for the tropical Pacific is presented by explicitly embedding into a layer ocean general circulation model (OGCM) a separate SSTA submodel with an empirical ...

Rong-Hua Zhang; Antonio J. Busalacchi; Raghuram G. Murtugudde

2006-09-01T23:59:59.000Z

46

Genesis of Indian Ocean Mixed Layer Temperature Anomalies: A Heat Budget Analysis  

Science Conference Proceedings (OSTI)

The genesis of mixed layer temperature anomalies across the Indian Ocean are analyzed in terms of the underlying heat budget components. Observational data, for which a seasonal budget can be computed, and a climate model output, which provides ...

Agus Santoso; Alexander Sen Gupta; Matthew H. England

2010-10-01T23:59:59.000Z

47

Atmospheric Precipitation in Response to Equatorial and Tropical Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

Three sets of numerical experiments based on a GFDL GCM were developed to investigate the response of the large-scale tropical circulation and precipitation to the tropical and equatorial sea surface temperature (SST) anomalies. Specified SST ...

Guoxiong Wu; Huanzhu Liu

1992-12-01T23:59:59.000Z

48

Warming Break Trends and Fractional Integration in the Northern, Southern, and Global Temperature Anomaly Series  

Science Conference Proceedings (OSTI)

This paper deals with the estimation of time trends in temperature anomaly series. However, instead of imposing that the estimated residuals from the time trends are covariance stationary processes with spectral density that is positive and ...

Luis A. Gil-Alana

2008-04-01T23:59:59.000Z

49

Impact of Common Sea Surface Temperature Anomalies on Global Drought and Pluvial Frequency  

Science Conference Proceedings (OSTI)

Climate model simulations run as part of the Climate Variability and Predictability (CLIVAR) Drought Working Group initiative were analyzed to determine the impact of three patterns of sea surface temperature (SST) anomalies on drought and ...

Kirsten L. Findell; Thomas L. Delworth

2010-02-01T23:59:59.000Z

50

Air-Sea Interaction as a Propagator of Equatorial Ocean Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The westward propagation of equatorial sea surface temperature anomalies exceeds the surface drift velocity and is probably associated with propagating changes in the depth of the surface mixed layer and upper thermocline. These can be caused by ...

Eric B. Kraus; Howard P. Hanson

1983-01-01T23:59:59.000Z

51

Physics and Dynamics of Density-Compensated Temperature and Salinity Anomalies. Part I: Theory  

Science Conference Proceedings (OSTI)

Subducted temperature anomalies have been invoked as a possible way for midlatitudes to alter the climate variability of equatorial regions through the so-called thermocline bridge, both in the Pacific and Atlantic Oceans. To have a significant ...

Rémi Tailleux; Alban Lazar; C. J. C. Reason

2005-05-01T23:59:59.000Z

52

Sensitivity of the Systematic Error of Extended Range Forecasts to Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The sensitivity of the systematic error of extended-range forecasts to sea surface temperature (SST) anomalies is investigated. General circulation model (GCM) experiments were performed to quantify error patterns for warm, normal, and cold SST ...

Kingtse C. Mo; X. L. Wang

1995-06-01T23:59:59.000Z

53

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2  

E-Print Network (OSTI)

Solar turbulence in earth's global and regional temperature anomalies Nicola Scafetta,1,2 Paolo a study of the influence of solar activity on the earth's temperature. In particular, we focus on the repercussion of the fluctuations of the solar irradiance on the temperature of the Northern and Southern

Scafetta, Nicola

54

The Impact of North Atlantic–Arctic Multidecadal Variability on Northern Hemisphere Surface Air Temperature  

Science Conference Proceedings (OSTI)

The twentieth-century Northern Hemisphere surface climate exhibits a long-term warming trend largely caused by anthropogenic forcing, with natural decadal climate variability superimposed on it. This study addresses the possible origin and ...

Vladimir A. Semenov; Mojib Latif; Dietmar Dommenget; Noel S. Keenlyside; Alexander Strehz; Thomas Martin; Wonsun Park

2010-11-01T23:59:59.000Z

55

Teleconnections in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

Teleconnections are calculated from monthly mean anomalies of sea level pressure and 500 mb geopotential height for the Southern Hemisphere (10–90°S) for five-month winter and summer seasons. The monthly means were calculated from Australian ...

Kingtse C. Mo; Glenn H. White

1985-01-01T23:59:59.000Z

56

Estimation of the Surface Heat Flux Response to Sea Surface Temperature Anomalies over the Global Oceans  

Science Conference Proceedings (OSTI)

The surface heat flux response to underlying sea surface temperature (SST) anomalies (the surface heat flux feedback) is estimated using 42 yr (1956–97) of ship-derived monthly turbulent heat fluxes and 17 yr (1984–2000) of satellite-derived ...

Sungsu Park; Clara Deser; Michael A. Alexander

2005-11-01T23:59:59.000Z

57

Testing a Dynamical Model for Mid-Latitude Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A slab model of the oceanic mixed layer is used to predict the statistical characteristics of the sea surface temperature anomalies that are forced by day-to-day changes in air-sea fluxes in the presence of a mean current. Because of the short ...

Claude Frankignoul; Richard W. Reynolds

1983-07-01T23:59:59.000Z

58

Radiative and Dynamical Forcing of the Surface and Atmospheric Temperature Anomalies Associated with the Northern Annular Mode  

Science Conference Proceedings (OSTI)

On the basis of the total energy balance within an atmosphere–surface column, an attribution analysis is conducted for the Northern Hemisphere (NH) atmospheric and surface temperature response to the northern annular mode (NAM) in boreal winter. ...

Yi Deng; Tae-Won Park; Ming Cai

2013-07-01T23:59:59.000Z

59

Airborne-temperature-survey maps of heat-flow anomalies for exploration geology  

DOE Green Energy (OSTI)

Airborne temperature surveys were used to depict the small surface temperature differences related to heat flow anomalies. Zones with conductive heat flow differences of 45 +- 16 ..mu..cal/cm/sup 2/(s) had predawn surface temperature differences of 1.4 +- 0.3/sup 0/C. Airborne temperature surveys were coordinated with field temperature surveys at Long Valley, California, the site of a known geothermal resource area. The airborne temperature surveys recorded redundant, predawn temperatures at two wavelengths and at two elevations. Overall temperature corrections were determined by calibrating dry soil surface temperatures with thermistor probes. The probes measured air and soil temperatures within 2 cm of the surface, every twenty minutes, during the survey overflights.

Del Grande, N.K.

1982-07-09T23:59:59.000Z

60

Correlations and periodicities in Himalayan tree ring widths and temperature anomalies through wavelets  

E-Print Network (OSTI)

We have studied periodicities and correlation properties of tree ring width chronology of deodar tree from Joshimath (1584 - 1999 years) and Uttarkashi (1500 - 2002 years) in the western Himalayas and the pre-monsoon (March-April-May) temperature anomalies (1876 - 2003) relative to 1961 -1990 mean, through wavelet analysis. Periodic behavior is observed in the tree ring chronology with periodicity in the form 11, 22, and 42 years. The analysis of the self-similar nature reveals long-range correlation with a Hurst exponent, $H >0.5$. These are anti-correlated with the temperature anomalies. An interesting inversion behavior is observed around the year 1750. The power spectral analysis of the time series corroborate the results of wavelet method.

Prasanta K. Panigrahi; P. Manimaran; Ananth Lakhmi; Ram R. Yadav

2006-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Rockesonde Evidence for a Stratospheric Temperature Decrease in the Western Hemisphere during 1973–85  

Science Conference Proceedings (OSTI)

Rocketsonde temperatures for the 26–35 km layer have been compared with nearby radiosonde temperatures at 10 mb (30 km), confirming that during the early 1970s the rocketsonde temperatures cooled appreciably relative to radiosonde temperature ...

J. K. Angell

1987-11-01T23:59:59.000Z

62

The Southern Oscillation. Part V: The Anomalies in the Lower Stratosphere of the Northern Hemisphere in Winter and a Comparison with the Quasi-Biennial Oscillation  

Science Conference Proceedings (OSTI)

The mean anomalies of 50 mb height in the northern winter for seven Warm Events in the Southern Oscillation show a weak polar vortex and an enhanced Aleutian high. In the mean for six Cold Events the polar vortex is unusually strong and the ...

H. van Loon; K. Labitzke

1987-02-01T23:59:59.000Z

63

Observed Nonlinearities of Monthly Teleconnections between Tropical Pacific Sea Surface Temperature Anomalies and Central and Eastern North American Precipitation  

Science Conference Proceedings (OSTI)

Most investigations of relationships between tropical Pacific sea surface temperature anomaly (SSTA) events and regional climate patterns have assumed the teleconnections to be linear, whereby the climate patterns associated with cold SSTA events ...

David L. Montroy; Michael B. Richman; Peter J. Lamb

1998-07-01T23:59:59.000Z

64

Analysis of General Circulation Model Sea-Surface Temperature Anomaly Simulations Using a Linear Model. Part I: Forced Solutions  

Science Conference Proceedings (OSTI)

Experiments are presented which indicate that many features of the response of a general circulation model to sea-surface temperature anomalies in the equatorial Pacific east of the dateline can be reproduced with a linear nondivergent barotropic ...

Grant Branstator

1985-11-01T23:59:59.000Z

65

Response of the Atmosphere to Sea Surface Temperature Anomalies over the Equatorial Pacific and the Teleconnections of the Southern Oscillation  

Science Conference Proceedings (OSTI)

In order to improve our understanding of the role of equatorial Pacific sea surface temperature (SST) anomalies in the Southern Oscillation and the variability of the Walker Circulation, we have conducted sensitivity studies with warm SSTA's over ...

R. N. Keshavamurty

1982-06-01T23:59:59.000Z

66

Airborne-temperature-survey maps of heat-flow anomalies for exploration geology  

DOE Green Energy (OSTI)

Precise airborne temperature surveys depicted small predawn surface temperature differences related to heat flow anomalies at the Long Valley, California, KGRA. Zones with conductive heat flow differences of 45 +- 16 ..mu..cal/cm/sup 2/(s) has predawn surface temperature differences of 1.4 +- 0.3/sup 0/C. The warmer zones had hot water circulating in a shallow (less than 60-m-deep) aquifer. Hot water is a useful geochemical indicator of geothermal and mineral resource potential. The precise airborne temperature survey method recorded redundant infrared scanner signals at two wavelengths (10 to 12 ..mu..m and 4.5 to 5.5 ..mu..m) and two elevations (0.3 km and 1.2 km). Ground thermistor probes recorded air and soil temperatures during the survey overflights. Radiometric temperatures were corrected for air-path and reflected-sky-radiation effects. Corrected temperatures were displayed in image form with color-coded maps which depicted 0.24/sup 0/C temperature differences. After accounting for surficial features on the corrected predawn thermal imagery, there remained several anomalous zones. These zones had high temperature gradients at depths from 6 to 30 m, compared to the temperature gradients in nearby areas.

Del Grande, N.K.

1982-11-10T23:59:59.000Z

67

Northern Hemisphere 700 mb Heights and Pacific Ocean Temperatures for Winter Months  

Science Conference Proceedings (OSTI)

Mean monthly 700 mb height data are analyzed in relation to Pacific Ocean sea-surface temperatures (SST). Instead of treating the winter season as a unit, the data are analyzed separately for December, January and February; some results for ...

Sigmund Fritz

1982-01-01T23:59:59.000Z

68

Cloudy Winter Satellite Temperature Retrievals over the Extratropical Northern Hemisphere Oceans  

Science Conference Proceedings (OSTI)

An experimental colocation and statistical regression scheme is used to verify the hypothesis that large consistent mean errors in the cloudy oceanic satellite temperature retrievals north of 30°N from TIROS-N are due to a continental bias in the ...

Norman A. Phillips

1981-03-01T23:59:59.000Z

69

The Impact of a Changing Southern Hemisphere Annular Mode on Antarctic Peninsula Summer Temperatures  

Science Conference Proceedings (OSTI)

Since the mid-1960s, rapid regional summer warming has occurred on the east coast of the northern Antarctic Peninsula, with near-surface temperatures increasing by more than 2°C. This warming has contributed significantly to the collapse of the ...

Gareth J. Marshall; Andrew Orr; Nicole P. M. van Lipzig; John C. King

2006-10-01T23:59:59.000Z

70

The Roles of CO2 and Orbital Forcing in Driving Southern Hemispheric Temperature Variations during the Last 21 000 Yr  

Science Conference Proceedings (OSTI)

Transient climate model simulations covering the last 21 000 yr reveal that orbitally driven insolation changes in the Southern Hemisphere, combined with a rise in atmospheric pCO2, were sufficient to jump-start the deglacial warming around ...

Axel Timmermann; Oliver Timm; Lowell Stott; Laurie Menviel

2009-04-01T23:59:59.000Z

71

Seasonal Prediction of Sea Surface Temperature Anomalies Using a Suite of 13 Coupled Atmosphere–Ocean Models  

Science Conference Proceedings (OSTI)

Improved seasonal prediction of sea surface temperature (SST) anomalies over the global oceans is the theme of this paper. Using 13 state-of-the-art coupled global atmosphere–ocean models and 13 yr of seasonal forecasts, the performance of ...

T. N. Krishnamurti; Arindam Chakraborty; Ruby Krishnamurti; William K. Dewar; Carol Anne Clayson

2006-12-01T23:59:59.000Z

72

A Southern Hemisphere Wave Response to ENSO with Implications for Southern Africa Precipitation  

Science Conference Proceedings (OSTI)

Ensemble GCM simulations with an imposed, idealized warming of the eastern Pacific Ocean reveal two wave anomalies in the Southern Hemisphere, one in the eastern and one in the western hemisphere. Both are statistically significant at the 99% ...

Kerry H. Cook

2001-08-01T23:59:59.000Z

73

Global Climate Variations Connected with Sea Surface Temperature Anomalies in the Eastern Equatorial Pacific Ocean for the 1958–73 Period  

Science Conference Proceedings (OSTI)

The sea surface temperature anomalies in the eastern equatorial Pacific Ocean are shown to demarcate a “key region” new 130°W for observed variations in the global general circulation. Various techniques are used to describe global conditions ...

Yi Hong Pan; Abraham H. Oort

1983-06-01T23:59:59.000Z

74

Multiple Flow Regimes in the Northern Hemisphere Winter. Part II: Sectorial Regimes and Preferred Transitions  

Science Conference Proceedings (OSTI)

This paper presents an observational analysis of recurrent flow patterns in the Northern Hemisphere (NH) winter, based on a 37-year series of daily 700-mb height anomalies. Large-scale anomaly patterns that appear repeatedly and persist beyond ...

Masahide Kimoto; Michael Ghil

1993-08-01T23:59:59.000Z

75

The influence of tropical Pacific SST anomaly on surface air temperature in China  

Science Conference Proceedings (OSTI)

The influence of the tropical Pacific sea surface temperature (SST) on the wintertime surface air temperature (SAT) in China is investigated using both the observational data and the output of coupled ocean-atmosphere numerical models during the ...

XiaoJing Jia; Hai Lin; Xia Yao

76

Proxy-Based Northern Hemisphere Surface Temperature Reconstructions: Sensitivity to Method, Predictor Network, Target Season, and Target Domain  

Science Conference Proceedings (OSTI)

Results are presented from a set of experiments designed to investigate factors that may influence proxy-based reconstructions of large-scale temperature patterns in past centuries. The factors investigated include 1) the method used to ...

S. Rutherford; M. E. Mann; T. J. Osborn; K. R. Briffa; P?D. Jones; R. S. Bradley; M. K. Hughes

2005-07-01T23:59:59.000Z

77

Climatic Trends in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

Observations of monthly mean sea level pressure, surface air temperature, and 500 mb and 300 mb geopotential heights and temperatures are used to study trends in the Southern Hemisphere from 1951–81.

Kingtse C. Mo; Harry Van Loon

1985-08-01T23:59:59.000Z

78

An Empirical Benchmark for Decadal Forecasts of Global Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The suitability of a linear inverse model (LIM) as a benchmark for decadal surface temperature forecast skill is demonstrated. Constructed from the observed simultaneous and 1-yr lag covariability statistics of annually averaged sea surface ...

Matthew Newman

2013-07-01T23:59:59.000Z

79

Recent Maximum Temperature Anomalies at Albany, New York: Fact or Fiction  

Science Conference Proceedings (OSTI)

An analysis has been conducted of a suspected daily maximum temperature (DMT) bias introduced by the replacement of the National Weather Service (NWS) HO-63 bygrothermograph with a modernized HO-83 instrument at Albany, New York, on 6 February ...

Ronald W. Kessler; Lance F. Bosart; Robert S. Gaza

1993-02-01T23:59:59.000Z

80

A new water anomaly: the temperature dependence of the proton mean kinetic energy  

E-Print Network (OSTI)

The mean kinetic energy of protons in water is determined by Deep Inelastic Neutron Scattering experiments, performed above and below the temperature of maximum density and in the supercooled phase. The temperature dependence of this energy shows an anomalous behavior, as it occurs for many water properties. In particular two regions of maximum kinetic energy are identified: the first one, in the supercooled phase in the range 269 K - 272 K, and a second one above 273 K. In both these regions the measured proton kinetic energy exceedes the theoretical prediction based on a semi-classical model. Noteworthy, the proton mean kinetic energy has a maximum at 277 K, the temperature of the maximum density of water. In the supercooled metastable phase the measured mean kinetic energy and the proton momentum distribution clearly indicate proton delocalization between two H-bonded oxygens.

Davide Flammini; Fabio Bruni; Maria Antonietta Ricci

2009-01-27T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Regional and Global Impacts of Land Cover Change and Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

The atmospheric and land components of the Geophysical Fluid Dynamics Laboratory’s (GFDL’s) Climate Model version 2.1 (CM2.1) is used with climatological sea surface temperatures (SSTs) to investigate the relative climatic impacts of historical ...

Kirsten L. Findell; Andrew J. Pitman; Matthew H. England; Philip J. Pegion

2009-06-01T23:59:59.000Z

82

Investigating the Impact of Reemerging Sea Surface Temperature Anomalies on the Winter Atmospheric Circulation over the North Atlantic  

Science Conference Proceedings (OSTI)

Extratropical SSTs can be influenced by the “reemergence mechanism,” whereby thermal anomalies in the deep winter mixed layer persist at depth through summer and are then reentrained into the mixed layer in the following winter. The impact of ...

Christophe Cassou; Clara Deser; Michael A. Alexander

2007-07-01T23:59:59.000Z

83

The Relationship between the Southern Hemisphere Annular Mode and Antarctic Peninsula Summer Temperatures: Analysis of a High-Resolution Model Climatology  

Science Conference Proceedings (OSTI)

The large regional summer warming on the east coast of the northern Antarctic Peninsula (AP), which has taken place since the mid-1960s, has previously been proposed to be caused by a trend in the Southern Hemisphere Annular Mode (SAM). The ...

Nicole P. M. van Lipzig; Gareth J. Marshall; Andrew Orr; John C. King

2008-04-01T23:59:59.000Z

84

Hemispherical Laue camera  

DOE Patents (OSTI)

A hemispherical Laue camera comprises a crystal sample mount for positioning a sample to be analyzed at the center of sphere of a hemispherical, X-radiation sensitive film cassette, a collimator, a stationary or rotating sample mount and a set of standard spherical projection spheres. X-radiation generated from an external source is directed through the collimator to impinge onto the single crystal sample on the stationary mount. The diffracted beam is recorded on the hemispherical X-radiation sensitive film mounted inside the hemispherical film cassette in either transmission or back-reflection geometry. The distances travelled by X-radiation diffracted from the crystal to the hemispherical film are the same for all crystal planes which satisfy Bragg's Law. The recorded diffraction spots or Laue spots on the film thereby preserve both the symmetry information of the crystal structure and the relative intensities which are directly related to the relative structure factors of the crystal orientations. The diffraction pattern on the exposed film is compared with the known diffraction pattern on one of the standard spherical projection spheres for a specific crystal structure to determine the orientation of the crystal sample. By replacing the stationary sample support with a rotating sample mount, the hemispherical Laue camera can be used for crystal structure determination in a manner previously provided in conventional Debye-Scherrer cameras.

Li, James C. M. (Pittsford, NY); Chu, Sungnee G. (Rochester, NY)

1980-01-01T23:59:59.000Z

85

Midtropospheric Circulation Patterns Associated with Extreme Dry and Wet Episodes over Equatorial Eastern Africa during the Northern Hemisphere Spring  

Science Conference Proceedings (OSTI)

The anomaly circulation patterns of contrasting wet and dry episodes over the equatorial eastern Africa (EEA) region are studied using the European Centre for Medium-Range Weather Forecasts analyses. The study focuses on the Northern Hemisphere ...

Raphael E. Okoola

1999-08-01T23:59:59.000Z

86

The Vertical Structures of Atmospheric Temperature Anomalies Associated with Two Flavors of El Niño Simulated by AMIP II Models  

Science Conference Proceedings (OSTI)

Recent studies have identified different modes associated with two flavors of El Niño in terms of the three-dimensional structure of atmospheric temperature. The first is a deep-warm mode, which features a coherent zonal mean warming throughout ...

Tianjun Zhou; Jie Zhang

2011-02-01T23:59:59.000Z

87

A General Circulation Model Study of January Climate Anomaly Patterns Associated with Interannual Variation of Equatorial Pacific Sea Surface Temperatures  

Science Conference Proceedings (OSTI)

A general circulation model has been run in the perpetual January mode to produce several long-term simulations, each distinguished by a different imposed equatorial Pacific sea surface temperature. From each of them simulations we have extracted ...

Maurice L. Blackmon; John E. Geisler; Eric J. Pitcher

1983-06-01T23:59:59.000Z

88

An Examination of El Niño–La Niña-Related Precipitation and Temperature Anomalies across the Northern Plains  

Science Conference Proceedings (OSTI)

Monthly total precipitation and mean temperature data records extending from the late nineteenth century to 1990 were collected for 147 stations in South Dakota, North Dakota, and portions of adjacent states and provinces. This region, defined as ...

Matthew J. Bunkers; James R. Miller Jr.; Arthur T. DeGaetano

1996-01-01T23:59:59.000Z

89

Recent Observed Interdecadal Climate Changes in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

The largest increases in surface temperatures over the Northern Hemisphere in the decade prior to 1988 were in Alaska, while substantial decreases occurred in the North Pacific Ocean. This illustrates the considerable geographic spatial structure ...

Kevin E. Trenberth

1990-07-01T23:59:59.000Z

90

The Zonal Asymmetry of the Southern Hemisphere Winter Storm Track  

Science Conference Proceedings (OSTI)

Atmospheric general circulation model experiments have been performed to investigate how the significant zonal asymmetry in the Southern Hemisphere (SH) winter storm track is forced by sea surface temperature (SST) and orography. An experiment ...

Masaru Inatsu; Brian J. Hoskins

2004-12-01T23:59:59.000Z

91

Investigations of Possible Low-Level Temperature and Moisture Anomalies During the AMIE Field Campaign on Manus Island  

SciTech Connect

This document discusses results stemming from the investigation of near-surface temperature and moisture “oddities” that were brought to light as part of the Atmospheric Radiation Measurement (ARM) Madden-Julian Oscillation (MJO) Investigation Experiment (AMIE), Dynamics of the Madden-Julian Oscillation (DYNAMO), and Cooperative Indian Ocean experiment on intraseasonal variability in the Year 2011 (CINDY2011) campaigns.

Long, CN; Holdridge, DJ

2012-11-19T23:59:59.000Z

92

Short-Term Climatic Fluctuations Forced by Thermal Anomalies  

Science Conference Proceedings (OSTI)

A two-level, global, spectral model is used to study the response of the atmosphere to sea surface temperature anomalies. Two sea surface temperature anomaly patterns are investigated. The first, called the El Niño pattern (Experiment 1), ...

Adel F. Hanna; Duane E. Stevens; Elmar R. Reiter

1984-01-01T23:59:59.000Z

93

Life Cycles of Persistent Anomalies. Part I: Evolution of 500 mb Height Fields  

Science Conference Proceedings (OSTI)

We have conducted observational analysts to identify systematic aspects of the life cycles of persistent anomalies of the extratropical Northern Hemisphere wintertime circulation. In the present study, we focus on the typical characteristics of ...

Randall M. Dole

1989-01-01T23:59:59.000Z

94

Free form hemispherical shaped charge  

SciTech Connect

A hemispherical shaped charge has been modified such that one side of the hemisphere is spherical and the other is aspherical allowing a wall thickness variation in the liner. A further modification is to use an elongated hemispherical shape. The liner has a thick wall at its pole and a thin wall at the equator with a continually decreasing wall thickness from the pole to the equator. The ratio of the wall thickness from the pole to the equator varies depending on liner material and HE shape. Hemispherical shaped charges have previously been limited to spherical shapes with no variations in wall thicknesses. By redesign of the basic liner thicknesses, the jet properties of coherence, stability, and mass distribution have been significantly improved.

Haselman, Jr., Leonard C. (Livermore, CA)

1996-01-01T23:59:59.000Z

95

Wavelike Southern Hemisphere Extratropical Teleconnections  

Science Conference Proceedings (OSTI)

The dynamical basis of intraseasonal oscillations of the Southern Hemisphere summer and winter seasons is studied with a combination of observed diagnostics and simplified prognostic models. High-frequency oscillations, zonal mean variations, and ...

Ernesto H. Berbery; Julia Nogués-Paegle; John D. Horel

1992-01-01T23:59:59.000Z

96

Free form hemispherical shaped charge  

DOE Patents (OSTI)

A hemispherical shaped charge has been modified such that one side of the hemisphere is spherical and the other is a spherical allowing a wall thickness variation in the liner. A further modification is to use an elongated hemispherical shape. The liner has a thick wall at its pole and a thin wall at the equator with a continually decreasing wall thickness from the pole to the equator. The ratio of the wall thickness from the pole to the equator varies depending on liner material and HE shape. Hemispherical shaped charges have previously been limited to spherical shapes with no variations in wall thicknesses. By redesign of the basic liner thicknesses, the jet properties of coherence, stability, and mass distribution have been significantly improved. It is an object of this invention to provide an improved shape charge for oil well perforation.

Haselman, L.C. Jr.

1994-12-31T23:59:59.000Z

97

A Closer Look at the Effect of the 11-Year Solar Cycle and the Quasi-biennial Oscillation on Northern Hemisphere 700 mb Height and Extratropical North American Surface Temperature  

Science Conference Proceedings (OSTI)

A recently discovered association between the 11-year solar cycle and the Northern Hemispheric low-frequency atmospheric circulation structure, which is most easily delectable when the two phases of the Quasi-biennial Oscillation (QBO) are ...

Anthony G. Barnston; Robert E. Livezey

1989-11-01T23:59:59.000Z

98

Global, Hemispheric, and Zonal Temperature Deviations (CDIAC...  

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

54-Station Radiosonde Network Graph graphic Graphics Data graphic Data Investigator J. K. Angell National Oceanic and Atmospheric Administration, Air Resources Laboratory (REAR),...

99

Life Span of Subseasonal Coupled Anomalies  

Science Conference Proceedings (OSTI)

The impact of the local phase relationship between the low-level atmospheric circulation and the sea surface temperature (SST) on the duration of atmospheric anomalies is statistically evaluated. Using 5-day-average data from the NCEP–NCAR ...

Malaquías Peña; Ming Cai; Eugenia Kalnay

2004-04-01T23:59:59.000Z

100

Is the Accrual Anomaly a Global Anomaly?  

E-Print Network (OSTI)

This paper investigates the subsequent return implications of accruals within a sample of large, developed, international equity markets and assesses whether similar institutional features account for the accrual anomaly ...

LaFond, Ryan

2005-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Dynamics of the Southern Hemisphere Spiral Jet  

Science Conference Proceedings (OSTI)

The formation of the Southern Hemisphere spiral jet is investigated using observations over a 40-yr period. It is found that between late March and early April, the upper-tropospheric westerly jet in the Southern Hemisphere undergoes a transition ...

Lindsey N. Williams; Sukyoung Lee; Seok-Woo Son

2007-02-01T23:59:59.000Z

102

Tir (Aster) Geothermal Anomalies | Open Energy Information  

Open Energy Info (EERE)

Tir (Aster) Geothermal Anomalies Tir (Aster) Geothermal Anomalies Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Tir (Aster) Geothermal Anomalies Details Activities (1) Areas (1) Regions (0) Abstract: The focus of this research is the detection of shallow thermal anomalies for geothermal exploration and field management. The objective of this paper is to outline the steps involved in applying thermal infrared imagery (TIR) for this task. This process is part of an ongoing project at the Energy & Geoscience Institute (EGI), where we are developing a methodology to use daytime and nighttime thermal infrared imagery produced by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) to map shallow thermal anomalies. Kinetic temperature images

103

Hemispherical spondylosclerosis - a polyetiologic syndrome  

SciTech Connect

Radiologic examination of 43 patients revealed 47 lesions of a type which we have termed hemispherical spondylosclerosis (HSS). This term describes and includes the following essential and possible radiologic findings of the disease: 1) Hemispherical (or dome - or helmet-shaped ) sclerosis of the vertebra above the intervertebral disk. Thus it is a supradiscal HSS. 2) One or more small erosions of the inferior end plate of the vertebra involved. 3) Periosteal apposition on the anterior border of the vertebra along the length of the sclerosis. 4) New bone formation on the inferior end plate. 5) Anterior vertebral osteophytes. 6) Narrowing of the disk space below the affected vertebra. HSS occurs not only as a sequel of degenerative disk disease, but also in bacterial (tuberculous and non-tuberculous) spondylitis, ankylosing spondylitis, osteoid osteoma, and metastases of neoplasms. The differential diagnosis between inflammatory and non-inflammatory pathogenesis and etiology of HSS is described. The characteristic shape of HSS, its sites of predilection (L4 >> L5 > L3), and the preponderance of female sufferers from this painful condition are due to factors which, as yet, remain unknown.

Dihlmann, W.

1981-11-01T23:59:59.000Z

104

Linear Statistical Short-Term Climate Predictive Skill in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

In this study, the sources and strengths of statistical short-term climate predictability for local surface climate (temperature and precipitation) and 700-mb geopotential height in the Northern Hemisphere are explored at all times of the year at ...

Anthony G. Barnston

1994-10-01T23:59:59.000Z

105

Evolution of the Southern Hemisphere Subpolar Middle Atmosphere during Summer and Autumn  

Science Conference Proceedings (OSTI)

The evolution of zonal wind and zonal wavenumber one (wave 1) in the Southern Hemisphere subpolar middle atmosphere is described for the period December 1978–May 1979 using temperature and ozone measurements from the Limb Infrared Monitor of the ...

T. Miles; W. L. Grose; E. E. Remsberg; G. Lingenfelser

1994-03-01T23:59:59.000Z

106

Differences between the Spring and Autumn Circulation of the Northern Hemisphere  

Science Conference Proceedings (OSTI)

The phase of the annual cycle in the mean temperature of the Northern Hemisphere troposphere lags the conventional meteorological seasons (centered on April and October) by about two weeds. Hence, the conventional spring season is colder and ...

Eric L. Fleming; Gyu-Ho Lim; John M. Wallace

1987-05-01T23:59:59.000Z

107

NIST Complete hemispherical infrared laser-based ...  

Science Conference Proceedings (OSTI)

... A custom instrument, the Complete Hemispherical infrared Laser-based Reflectometer ... using light input from a selection of lasers covering the ...

2010-10-05T23:59:59.000Z

108

Anomaly General Circulation Models  

Science Conference Proceedings (OSTI)

Anomally models based on a spectral general circulation model (GCM) are formulated and applied to study of low-frequency atmospheric variability in the extratropics, and long-range forecasting research. A steady linear version of the anomaly ...

A. Navarra; K. Miyakoda

1988-05-01T23:59:59.000Z

109

The Unusual Midwinter Warming in the Southern Hemisphere Stratosphere 2002: A Comparison to Northern Hemisphere Phenomena  

Science Conference Proceedings (OSTI)

A strong midwinter warming occurred in the Southern Hemisphere (SH) stratosphere in September 2002. Based on experiences from the Northern Hemisphere (NH), this event can be defined as a major warming with a breakdown of the polar vortex in ...

Kirstin Krüger; Barbara Naujokat; Karin Labitzke

2005-03-01T23:59:59.000Z

110

Variations of the Northern Hemisphere Atmospheric Energetics: 1948–2000  

Science Conference Proceedings (OSTI)

Many studies have shown evidence of a major climate change in the late 1970s and early 1980s. The change comprises a reversal of the sea surface temperature anomaly pattern in the North Pacific Ocean, a lowering of the atmospheric geopotential ...

Qi Hu; Y. Tawaye; S. Feng

2004-05-01T23:59:59.000Z

111

Mechanisms of Summertime Subtropical Southern Indian Ocean Sea Surface Temperature Variability: On the Importance of Humidity Anomalies and the Meridional Advection of Water Vapor  

Science Conference Proceedings (OSTI)

It is well known that some austral summertime subtropical Indian Ocean sea surface temperature (SST) variability correlates with rainfall over certain regions of Africa that depend on rainfall for their economic well-being. Recent studies have ...

A. M. Chiodi; D. E. Harrison

2007-10-01T23:59:59.000Z

112

Dynamical Seasonal Forecasts during the 1997/98 ENSO Using Persisted SST Anomalies  

Science Conference Proceedings (OSTI)

An evaluation of trial seasonal forecasts during the 1997/98 El Niño, using an atmospheric GCM forced by persisted sea surface temperature and sea-ice anomalies, is presented. Generally, forecasts of seasonal anomalies of precipitation, surface ...

Carsten S. Frederiksen; Huqiang Zhang; Ramesh C. Balgovind; Neville Nicholls; Wasyl Drosdowsky; Lynda Chambers

2001-06-01T23:59:59.000Z

113

The Observed Hemispheric Symmetry in Reflected Shortwave Irradiance  

Science Conference Proceedings (OSTI)

While the concentration of landmasses and atmospheric aerosols on the Northern Hemisphere suggests that the Northern Hemisphere is brighter than the Southern Hemisphere, satellite measurements of top-of-atmosphere irradiances found that both ...

Aiko Voigt; Bjorn Stevens; Jürgen Bader; Thorsten Mauritsen

2013-01-01T23:59:59.000Z

114

The influence of context on hemispheric recruitment during metaphor processing  

Science Conference Proceedings (OSTI)

Although the left hemisphere's prominence in language is well established, less emphasis has been placed on possible roles for the right hemisphere. Behavioral, patient, and neuroimaging research suggests that the right hemisphere may be involved in ...

Michele T. Diaz; Larson J. Hogstrom

2011-11-01T23:59:59.000Z

115

National Magnetic Anomaly Map  

DOE Green Energy (OSTI)

A record of the conclusions of a three-day meeting and workshop of the Committee for a National Magnetic Anomaly Map held in February 1976 is presented. The purpose of he workshop was to prepare a statement of the benefits, objectives, specifications, and requirements of a NMAM and establish a working plan for producing the map. (ACR)

Not Available

1976-01-01T23:59:59.000Z

116

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

117

The Vorticity Budget of the Hemispheres  

Science Conference Proceedings (OSTI)

The cyclonic vorticity budget of the hemispheres is investigated using the output of the CCC GCM and objective analyses for the FGGE period. Analysis of GCM output gives direct estimates of the “topographic” and “frictional” vorticity sources and ...

G. J. Boer

1991-01-01T23:59:59.000Z

118

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

119

Potential Vorticity Inversion on a Hemisphere  

Science Conference Proceedings (OSTI)

Several different kinds of accurate potential vorticity (PV) inversion operators, and the associated balanced models, are tested for the shallow water equations on a hemisphere in an attempt to approach the ultimate limitations of the balance, ...

Michael E. McIntyre; Warwick A. Norton

2000-05-01T23:59:59.000Z

120

Future Changes in Northern Hemisphere Snowfall  

Science Conference Proceedings (OSTI)

Using simulations performed with 18 coupled atmosphere–ocean global climate models from phase 5 of the Coupled Model Intercomparison Project (CMIP5), projections of the Northern Hemisphere snowfall under the representative concentration pathway (...

John P. Krasting; Anthony J. Broccoli; Keith W. Dixon; John R. Lanzante

2013-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Interannual Variations in the Southern Hemisphere Circulation  

Science Conference Proceedings (OSTI)

An analysis has been made of variations in the atmospheric circulation with periods of more than 50 days occurring in the Southern Hemisphere between 1980 and 1986, using analyses produced by the European Centre for Medium Range Weather Forecasts ...

John W. Kidson

1988-12-01T23:59:59.000Z

122

Anomaly Detection at Multiple Scales  

Science Conference Proceedings (OSTI)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Anomaly Detection at Multiple Scales, or ADAMS, is a $35 million DARPA project designed to identify patterns and anomalies ...

Alain Sren Mikhayhu

2012-06-01T23:59:59.000Z

123

The Annual Peak in the SST Anomaly Spectrum  

Science Conference Proceedings (OSTI)

The manner in which monthly mean sea surface temperature anomalies (SSTAs) show enhanced variance at the annual period in the extratropics (an annual peak in the variance spectrum) is illustrated by observations and model simulations. A mechanism,...

Jens Möller; Dietmar Dommenget; Vladimir A. Semenov

2008-06-01T23:59:59.000Z

124

The Annual Range of Southern Hemisphere SST: Comparison with Surface Heating and Possible Reasons for the High-Latitude Falloff  

Science Conference Proceedings (OSTI)

Globally, the seasonal cycle is the largest single component of observed sea surface temperature (SST) variability, yet it is still not fully understood. Herein, the degree to which the structure of the seasonal cycle of Southern Hemisphere SST ...

A. M. Chiodi; D. E. Harrison

2010-04-01T23:59:59.000Z

125

Future Changes in Northern Hemisphere Snowfall  

Science Conference Proceedings (OSTI)

Using simulations performed with 18 coupled atmosphere-ocean global climate models from the CMIP5 project, projections of Northern Hemisphere snowfall under the RCP4.5 scenario are analyzed for the period 2006-2100. These models perform well in ...

John P. Krasting; Anthony J. Broccoli; Keith Dixon; John Lanzante

126

Impact of Subsurface Temperature Variability on Surface Air Temperature Variability: An AGCM Study  

Science Conference Proceedings (OSTI)

Anomalous atmospheric conditions can lead to surface temperature anomalies, which in turn can lead to temperature anomalies in the subsurface soil. The subsurface soil temperature (and the associated ground heat content) has significant memory—...

Sarith P. P. Mahanama; Randal D. Koster; Rolf H. Reichle; Max J. Suarez

2008-08-01T23:59:59.000Z

127

Explosive Cyclone Development in the Southern Hemisphere and a Comparison with Northern Hemisphere Events  

Science Conference Proceedings (OSTI)

A compilation of Southern Hemisphere (SH) explosively developing cyclones (or “bombs”) has been assembled based on the National Centers for Environmental Prediction–Department of Energy reanalysis-2 data over the 21-yr period from 1979 to 1999. ...

Eun-Pa Lim; Ian Simmonds

2002-09-01T23:59:59.000Z

128

Monitoring smartphones for anomaly detection  

Science Conference Proceedings (OSTI)

In this paper we demonstrate how to monitor a smartphone running Symbian operating system and Windows Mobile in order to extract features for anomaly detection. These features are sent to a remote server because running a complex intrusion detection ... Keywords: anomaly detection, monitoring, smartphones

Aubrey-Derrick Schmidt; Frank Peters; Florian Lamour; Christian Scheel; Seyit Ahmet Çamtepe; Sahin Albayrak

2009-02-01T23:59:59.000Z

129

Trace Anomaly in Geometric Discretization  

E-Print Network (OSTI)

I develop the simplest geometric-discretized analogue of two dimensional scalar field theory, which qualitatively reproduces the trace anomaly of the continuous theory. The discrete analogue provides an interpretation of the trace anomaly in terms of a non-trivial transformation of electric-magnetic duality-invariant modes of resistor networks that accommodate both electric and magnetic charge currents.

Czech, B

2007-01-01T23:59:59.000Z

130

Hemispheric Helicity Trend for Solar Cycle 24  

E-Print Network (OSTI)

Using vector magnetograms obtained with the Spectro-polarimeter (SP) on aboard Hinode satellite, we studied two helicity parameters (local twist and current helicity) of 64 active regions occurred in the descending phase of solar cycle 23 and the ascending phase of solar cycle 24. Our analysis gives the following results. (1) The 34 active regions of the solar cycle 24 follow the so-called hemispheric helicity rule, whereas the 30 active regions of the solar cycle 23 do not. (2) When combining all 64 active regions as one sample, they follow the hemispheric helicity sign rule as in most other observations. (3) Despite with the so-far most accurate measurement of vector magnetic field given by SP/Hinode, the rule is still weak with large scatters. (4) The data show evidence of different helicity signs between strong and weak fields, confirming previous result from a large sample of ground-based observations. (5) With two example sunspots we show that the helicity parameters change sign from the inner umbra to ...

Hao, Juan

2011-01-01T23:59:59.000Z

131

HEMISPHERIC HELICITY TREND FOR SOLAR CYCLE 24  

Science Conference Proceedings (OSTI)

Using vector magnetograms obtained with the Spectro-polarimeter (SP) on board Hinode satellite, we studied two helicity parameters (local twist and current helicity) of 64 active regions that occurred in the descending phase of solar cycle 23 and the ascending phase of solar cycle 24. Our analysis gives the following results. (1) The 34 active regions of the solar cycle 24 follow the so-called hemispheric helicity rule, whereas the 30 active regions of the solar cycle 23 do not. (2) When combining all 64 active regions as one sample, they follow the hemispheric helicity sign rule as in most other observations. (3) Despite the so-far most accurate measurement of vector magnetic field given by SP/Hinode, the rule is still weak with large scatters. (4) The data show evidence of different helicity signs between strong and weak fields, confirming previous result from a large sample of ground-based observations. (5) With two example sunspots we show that the helicity parameters change sign from the inner umbra to the outer penumbra, where the sign of penumbra agrees with the sign of the active region as a whole. From these results, we speculate that both the {Sigma}-effect (turbulent convection) and the dynamo have contributed in the generation of helicity, whereas in both cases turbulence in the convection zone has played a significant role.

Hao Juan; Zhang Mei, E-mail: haojuan@nao.cas.cn [Key Laboratory of Solar Activity, National Astronomical Observatory, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012 (China)

2011-06-01T23:59:59.000Z

132

Temperature Variability over Africa  

Science Conference Proceedings (OSTI)

The variation of near-surface air temperature anomalies in Africa between 1979 and 2010 is investigated primarily using Microwave Sounding Unit (MSU) total lower-tropospheric temperature data from the Remote Sensing Systems (RSS) and the ...

Jennifer M. Collins

2011-07-01T23:59:59.000Z

133

Graph anomalies in cyber communications  

Science Conference Proceedings (OSTI)

Enterprises monitor cyber traffic for viruses, intruders and stolen information. Detection methods look for known signatures of malicious traffic or search for anomalies with respect to a nominal reference model. Traditional anomaly detection focuses on aggregate traffic at central nodes or on user-level monitoring. More recently, however, traffic is being viewed more holistically as a dynamic communication graph. Attention to the graph nature of the traffic has expanded the types of anomalies that are being sought. We give an overview of several cyber data streams collected at Los Alamos National Laboratory and discuss current work in modeling the graph dynamics of traffic over the network. We consider global properties and local properties within the communication graph. A method for monitoring relative entropy on multiple correlated properties is discussed in detail.

Vander Wiel, Scott A [Los Alamos National Laboratory; Storlie, Curtis B [Los Alamos National Laboratory; Sandine, Gary [Los Alamos National Laboratory; Hagberg, Aric A [Los Alamos National Laboratory; Fisk, Michael [Los Alamos National Laboratory

2011-01-11T23:59:59.000Z

134

Variability in daily, zonal mean lower-stratospheric temperatures  

Science Conference Proceedings (OSTI)

Satellite data from the microwave sounding unit (MSU) channel 4, when carefully merged, provide daily zonal anomalies of lower-stratosphere temperature with a level of precision between 0.01[degrees] and 0.08[degrees]C per 2.5[degrees] latitude band. Global averages of these daily zonal anomalies reveal the prominent warming events due to volcanic aerosol in 1982 (El Chichon) and 1991 (Mt. Pinatubo), which are on the order of 1[degrees]C. The quasibiennel oscillation (QBO) may be extracted from these zonal data by applying a spatial filter between 15[degrees]N and 15[degrees]S latitude, which resembles the meridional curvature. Previously published relationships between the QBO and the north polar stratospheric temperatures during northern winter are examined but were not found to be reproduced in the MSU4 data. Sudden stratospheric warmings in the north polar region are represented in the MSU4 data for latitudes poleward of 70[degrees]N. In the Southern Hemisphere, there appears to be a moderate relationship between total ozone concentration and MSU4 temperatures, though it has been less apparent in 1991 and 1992. In terms of empirical modes of variability revealed significant power in the 15-20 day period band.

Christy, J.R. (Univ. of Alabama, Huntsville, AL (United States)); Drouilhet, S.J. Jr. (Moorhead State Univ., MN (United States))

1994-01-01T23:59:59.000Z

135

Passive analysis of TCP anomalies  

Science Conference Proceedings (OSTI)

In this paper, we focus on passive measurements of TCP traffic. We propose a heuristic technique to classify TCP anomalies, i.e., segments that have a sequence number different from the expected one, such as out-of-sequence and duplicate segments. Since ... Keywords: TCP, Traffic measurements

Marco Mellia; Michela Meo; Luca Muscariello; Dario Rossi

2008-10-01T23:59:59.000Z

136

Regular Monthly Mean Temperatures of Earth's Oceans from Satellites  

Science Conference Proceedings (OSTI)

Comparisons of satellite-derived monthly mean sea surface temperature anomalies with National Marine Fisheries Service (NMFS) ship-derived monthly mean sea surface temperature anomalies over the North Pacific Ocean reveal some encouraging ...

A. E. Strong; J. A. Pritchard

1980-06-01T23:59:59.000Z

137

Bulk viscosity and the conformal anomaly in the pion gas  

E-Print Network (OSTI)

We calculate the bulk viscosity of the massive pion gas within Unitarized Chiral Perturbation Theory. We obtain a low temperature peak arising from explicit conformal breaking due to the pion mass and another peak near the critical temperature, dominated by the conformal anomaly through gluon condensate terms. The correlation between bulk viscosity and conformal breaking supports a recent QCD proposal. We discuss the role of resonances, heavier states and large-$N_c$ counting.

D. Fernandez-Fraile; A. Gomez Nicola

2008-09-26T23:59:59.000Z

138

A New Geothermal Anomaly In Nicaragua | Open Energy Information  

Open Energy Info (EERE)

A New Geothermal Anomaly In Nicaragua A New Geothermal Anomaly In Nicaragua Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A New Geothermal Anomaly In Nicaragua Details Activities (0) Areas (0) Regions (0) Abstract: The information acquired during reconnaissance surface exploration in Nicaragua suggests a large geothermal reservoir in the region of Masaya-Nandaime. The exploration programme included geological, geophysical, geochemical, as well as hydrogeological investigations. Integration of the results from various disciplines permitted postulation of a conceptual model of the reservoir and of the thermal regime within the zone immediately above and around the reservoir. The reservoir with a temperature in excess of 200°C is emplaced at a depth between 2 and 4 km

139

Statistics and Dynamics of Persistent Anomalies  

Science Conference Proceedings (OSTI)

Persistent anomalies with recurrent spatial patterns play an important role in the atmosphere's low-frequency variability. We establish a connection between statistical and dynamical methods of description and prediction of persistent anomalies. ...

Kingtse C. Mo; Michael Ghil

1987-03-01T23:59:59.000Z

140

Anomaly detection and diagnosis in grid environments  

Science Conference Proceedings (OSTI)

Identifying and diagnosing anomalies in application behavior is critical to delivering reliable application-level performance. In this paper we introduce a strategy to detect anomalies and diagnose the possible reasons behind them. Our approach extends ...

Lingyun Yang; Chuang Liu; Jennifer M. Schopf; Ian Foster

2007-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Dynamics of the Extratropical Response to a Tropical Atlantic SST Anomaly  

Science Conference Proceedings (OSTI)

Previous atmospheric general circulation model (AGCM) experiments revealed that atmospheric responses to a tropical Atlantic sea surface temperature anomaly (SSTA) were asymmetric with respect to the sign of the SSTA. A positive SSTA produced a ...

Shuanglin Li; Walter A. Robinson; Martin P. Hoerling; Klaus M. Weickmann

2007-02-01T23:59:59.000Z

142

Hawking radiation via anomaly cancellation for the black holes of five-dimensional minimal gauged supergravity  

E-Print Network (OSTI)

The anomaly cancellation method proposed by Wilczek et al. is applied to the general charged rotating black holes in five-dimensional minimal gauged supergravity. Thus Hawking temperature and fluxes are found. The Hawking ...

Porfyriadis, Achilleas P.

143

The Role of the “Atmospheric Bridge” in Linking Tropical Pacific ENSO Events to Extratropical SST Anomalies  

Science Conference Proceedings (OSTI)

The role of the atmospheric circulation as a “bridge” between sea surface temperature (SST) anomalies in the tropical Pacific and those in the midlatitude northern oceans is assessed. The key processes associated with this atmospheric bridge are ...

Ngar-Cheung Lau; Mary Jo Nath

1996-09-01T23:59:59.000Z

144

A Synthesis of Antarctic Temperatures  

Science Conference Proceedings (OSTI)

Monthly surface air temperatures from land surface stations, automatic weather stations, and ship/buoy observations from the high-latitude Southern Hemisphere are synthesized into gridded analyses at a resolution appropriate for applications ...

William L. Chapman; John E. Walsh

2007-08-01T23:59:59.000Z

145

On the Structure and Dynamics of Monthly Mean Sea Level Anomalies along the Pacific Coast of North and South America  

Science Conference Proceedings (OSTI)

The behavior and relationship of anomalies of monthly mean sea level, coastal sea surface temperature and alongshore wind stress for the eastern Pacific Ocean during the period 1950–74 have been studied. Sea level and temperature records from ...

D. B. Enfield; J. S. Allen

1980-04-01T23:59:59.000Z

146

A Climatology of Cyclogenesis for the Southern Hemisphere  

Science Conference Proceedings (OSTI)

This study surveys life cycle characteristics of cyclones in the Southern Hemisphere (SH). An objective technique for locating instances of cyclone formation, intensification, maturation, and decay is applied to a 7-year dataset of SH cyclone ...

Mark R. Sinclair

1995-06-01T23:59:59.000Z

147

The Heat Balance of the Western Hemisphere Warm Pool  

Science Conference Proceedings (OSTI)

The thermodynamic development of the Western Hemisphere warm pool and its four geographic subregions are analyzed. The subregional warm pools of the eastern North Pacific and equatorial Atlantic are best developed in the boreal spring, while in ...

David B. Enfield; Sang-ki Lee

2005-07-01T23:59:59.000Z

148

Differences in El Niño Response over the Southern Hemisphere  

Science Conference Proceedings (OSTI)

Southern Hemisphere (SH) circulation conditions during austral springs of ENSO events are examined. Based on previous knowledge that SST variations over the subtropical south-central Pacific (SSCP) region are linked to differences among El Niño (...

Carolina Vera; Gabriel Silvestri; Vicente Barros; Andrea Carril

2004-05-01T23:59:59.000Z

149

The Effects of Orography on Midlatitude Northern Hemisphere Dry Climates  

Science Conference Proceedings (OSTI)

The role of mountains in maintaining extensive midlatitude arid regions in the Northern Hemisphere was investigated using simulations from the GFDL Global Climate Model with and without orography. In the integration with mountains, dry climates ...

A. J. Broccoli; S. Manabe

1992-11-01T23:59:59.000Z

150

Isentropic Cross-Tropopause Ozone Transport in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

This paper investigates isentropic ozone exchange between the extratropical lower stratosphere and the subtropical upper troposphere in the Northern Hemisphere. The quantification method is based on the potential vorticity (PV) mapping of ...

P. Jing; D. M. Cunnold; H. J. Wang; E-S. Yang

2004-05-01T23:59:59.000Z

151

Thermally-Forced Mean Mass Circulations in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

A diagnostic approach to infer three-dimensional distribution of the thermally-forced, time-averaged horizontal mass and energy transport (Johnson and Townsend, 1981), which was previously applied in the Southern Hemisphere (Zillman, 1972), is ...

Bette L. Otto-Bliesner; Donald R. Johnson

1982-08-01T23:59:59.000Z

152

The Continuum and Dynamics of Northern Hemisphere Teleconnection Patterns  

Science Conference Proceedings (OSTI)

This study presents an alternative interpretation for Northern Hemisphere teleconnection patterns. Rather than comprising several different recurrent regimes, this study suggests that there is a continuum of teleconnection patterns. This ...

Christian Franzke; Steven B. Feldstein

2005-09-01T23:59:59.000Z

153

Seasonality in Southern Hemisphere Eddy Statistics at 500 mb  

Science Conference Proceedings (OSTI)

An analysis has been made of the spatial and frequency dependence of transient eddy statistics in the Southern Hemisphere at 500 mb. This study emphasizes summer versus winter differences in order to complement previous results of Trenberth (1981)...

Kevin E. Trenberth

1982-11-01T23:59:59.000Z

154

The Life Cycle of the Northern Hemisphere Sudden Stratospheric Warmings  

Science Conference Proceedings (OSTI)

Motivated by recent evidence of strong stratospheric–tropospheric coupling during the Northern Hemisphere winter, this study examines the evolution of the atmospheric flow and wave fluxes at levels throughout the stratosphere and troposphere ...

Varavut Limpasuvan; David W. J. Thompson; Dennis L. Hartmann

2004-07-01T23:59:59.000Z

155

Skewness, Kurtosis and Extreme Values of Northern Hemisphere Geopotential Heights  

Science Conference Proceedings (OSTI)

Twelve summers and 11 winters of Northern Hemisphere 500 and 1000 mb geopotential height are used to calculate the third and fourth moments of height in the nondimensional form of skewness and kurtosis. Geopotential height exhibits small but ...

Glenn H. White

1980-09-01T23:59:59.000Z

156

The Dynamics of Northern Hemisphere Stratospheric Final Warming Events  

Science Conference Proceedings (OSTI)

A lag composite analysis is performed of the zonal-mean structure and dynamics of Northern Hemisphere stratospheric final warming (SFW) events. SFW events are linked to distinct zonal wind deceleration signatures in the stratosphere and ...

Robert X. Black; Brent A. McDaniel

2007-08-01T23:59:59.000Z

157

A search for chaotic behavior in Northern Hemisphere stratospheric variability  

Science Conference Proceedings (OSTI)

Northern Hemisphere stratospheric variability is investigated with respect to chaotic behavior using time series from three different variables extracted from four different re-analysis products and two numerical model runs with different forcing. ...

Gualtiero Badin; Daniela I.V. Domeisen

158

Tropospheric Precursors of Anomalous Northern Hemisphere Stratospheric Polar Vortices  

Science Conference Proceedings (OSTI)

Regional extratropical tropospheric variability in the North Pacific and eastern Europe is well correlated with variability in the Northern Hemisphere wintertime stratospheric polar vortex in both the ECMWF reanalysis record and in the Whole ...

Chaim I. Garfinkel; Dennis L. Hartmann; Fabrizio Sassi

2010-06-01T23:59:59.000Z

159

Sensitivity of Tropical Tropospheric Temperature to Sea Surface Temperature Forcing  

Science Conference Proceedings (OSTI)

During El Niño, there are substantial tropospheric temperature anomalies across the entire tropical belt associated with the warming of sea surface temperatures (SSTs) in the central and eastern Pacific. The quasi-equilibrium tropical circulation ...

Hui Su; J. David Neelin; Joyce E. Meyerson

2003-05-01T23:59:59.000Z

160

An optimum approach for fabrication of tapered hemispherical-end fiber for laser module packaging  

Science Conference Proceedings (OSTI)

Keywords: coupling efficientcy, laser module packaging, semiempirical model, tapered hemispherical-end fiber

H. M. Yang; D. C. Jou; M. H. Chen; S. H. Wu; W. H. Cheng

2001-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Anomalies of Nuclear Criticality, Revision 6  

SciTech Connect

This report is revision 6 of the Anomalies of Nuclear Criticality. This report is required reading for the training of criticality professionals in many organizations both nationally and internationally. This report describes many different classes of nuclear criticality anomalies that are different than expected.

Clayton, E. D.; Prichard, Andrew W.; Durst, Bonita E.; Erickson, David; Puigh, Raymond J.

2010-02-19T23:59:59.000Z

162

Prediction of Spring Elbe Discharge Based on Stable Teleconnections with Winter Global Temperature and Precipitation  

Science Conference Proceedings (OSTI)

The predictability of Elbe streamflow anomalies during spring is examined using previous winter sea surface temperature (SST), temperature over land (TT), and precipitation (PP) anomalies. Based on running correlation analysis, the authors ...

Monica Ionita; Gerrit Lohmann; Norel Rimbu

2008-12-01T23:59:59.000Z

163

Machine learning for host-based anomaly detection  

Science Conference Proceedings (OSTI)

Anomaly detection techniques complement, signature based methods for intrusion detection. Machine learning approaches are applied to anomaly detection for automated learning and detection. Traditional host-based anomaly detectors model system call sequences ...

Gaurav Tandon / Philip K. Chan

2008-01-01T23:59:59.000Z

164

A Climatology of Anticyclones and Blocking for the Southern Hemisphere  

Science Conference Proceedings (OSTI)

An automated procedure for locating and tracking high pressure centers is applied to 10 years of twice-daily ECMWF analyses during 1980–89 to survey the behavior of anticyclones in the Southern Hemisphere. Anticyclones are concentrated in the 25°–...

Mark R. Sinclair

1996-02-01T23:59:59.000Z

165

An Objective Cyclone Climatology for the Southern Hemisphere  

Science Conference Proceedings (OSTI)

An objective method is developed and used to derive a climatology of centers of cyclonic vorticity for the Southern Hemisphere, based on twice-daily European Centre for Medium-Range Weather Forecasts (ECMWF) 1000-hPa analyses during 1980–86. ...

Mark R. Sinclair

1994-10-01T23:59:59.000Z

166

Comparison of Northern Hemisphere Snow Cover Data Sets  

Science Conference Proceedings (OSTI)

Four Northern Hemisphere snow cover data sets are compared on a weekly basis for the 25-month period, July 1981 through July 1983. The data sets are the NOAA/NESDIS Weekly Snow and Ice Chart, the Composite Minimum Brightness (CMB) Chart, the U.S. ...

John Scialdone; Alan Robock

1987-01-01T23:59:59.000Z

167

New Perspectives on the Northern Hemisphere Winter Storm Tracks  

Science Conference Proceedings (OSTI)

The aim of this paper is to explore the use of both an Eulerian and system-centered method of storm track diagnosis applied to a wide range of meteorological fields at multiple levels to provide a range of perspectives on the Northern Hemisphere ...

Brian J. Hoskins; Kevin I. Hodges

2002-03-01T23:59:59.000Z

168

Intraseasonal Oscillations in the Global Atmosphere. Part II: Southern Hemisphere  

Science Conference Proceedings (OSTI)

In Part II of this two-part article, we complete the systematic examination of oscillatory modes in the global atmosphere by studying 12 years of 500 mb geopotential heights in the Southern Hemisphere. As in Part I, for the tropics and Northern ...

Michael Ghil; Kingtse Mo

1991-03-01T23:59:59.000Z

169

Climatological Features of Cutoff Low Systems in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

This study presents the first multidecadal climatology of cutoff low systems in the Northern Hemisphere. The climatology was constructed by using 41 yr (1958–98) of NCEP–NCAR reanalysis data and identifying cutoff lows by means of an objective ...

Raquel Nieto; Luis Gimeno; Laura de la Torre; Pedro Ribera; David Gallego; Ricardo García-Herrera; José Agustín García; Marcelino Nuñez; Angel Redaño; Jerónimo Lorente

2005-08-01T23:59:59.000Z

170

Ensembles of AGCM Two-Tier Predictions and Simulations of the Circulation Anomalies during Winter 1997–98  

Science Conference Proceedings (OSTI)

The impact of sea surface temperature (SST) anomalies on the extratropical circulation during the El Niño winter of 1997–98 is studied through atmospheric general circulation model (AGCM) integrations. The model’s midlatitude response is found to ...

John D. Farrara; Carlos R. Mechoso; Andrew W. Robertson

2000-10-01T23:59:59.000Z

171

The Role of Oceanic Heat Advection in the Evolution of Tropical North and South Atlantic SST Anomalies  

Science Conference Proceedings (OSTI)

The role of horizontal oceanic heat advection in the generation of tropical North and South Atlantic sea surface temperature (SST) anomalies is investigated through an analysis of the oceanic mixed layer heat balance. It is found that SST ...

Gregory R. Foltz; Michael J. McPhaden

2006-12-01T23:59:59.000Z

172

The Russian Surface Temperature Data Set  

Science Conference Proceedings (OSTI)

A Russian group, under the initial leadership of M. I. Budyko, has produced the first comprehensive analysis of monthly average surface temperature (January 1891 through May 1980) for the Northern Hemisphere on a 5°×10° latitude-longitude grid. ...

Alan Robock

1982-12-01T23:59:59.000Z

173

On the Interpretation of Antarctic Temperature Trends  

Science Conference Proceedings (OSTI)

Determining the rate of atmospheric warming in Antarctica is hampered by the brevity of the temperature records (<50 years), which still contain signals of decadal circulation variability in the Southern Hemisphere. In this note it is ...

Michiel R. van den Broeke

2000-11-01T23:59:59.000Z

174

Potential Vorticity Anomalies Associated with Squall Lines  

Science Conference Proceedings (OSTI)

This study involves observations and model simulations of potential vorticity anomalies in the wake of midlatitude squall lines. Using data from the Oklahoma–Kansas PRE-STORM experiment, we analyze potential vorticity fields near two squall lines—...

Rolf F. A. Hertenstein; Wayne H. Schubert

1991-07-01T23:59:59.000Z

175

Science as an Anomaly-Driven Enterprise  

E-Print Network (OSTI)

Anomalous data lead to scientific discoveries. Although machine learning systems can be forced to resolve anomalous data, these systems use general learning algorithms to do so. To determine whether anomaly-driven approaches to discovery produce more accurate models than the standard approaches, we built a program called Kalpana. We also used Kalpana to explore means for identifying those anomaly resolutions that are acceptable to domain experts. Our experiments indicated that anomaly-driven approaches can lead to a richer set of model revisions than standard methods. Additionally we identified semantic and syntactic measures that are significantly correlated with the acceptability of model revisions. These results suggest that by interpreting data within the context of a model and by interpreting model revisions within the context of domain knowledge, discovery systems can more readily suggest accurate and acceptable anomaly resolutions.

Will Bridewell; Will Bridewell Phd

2004-01-01T23:59:59.000Z

176

Reanalysis of the Reactor Neutrino Anomaly  

E-Print Network (OSTI)

We reanalyze the reactor neutrino anomaly, wherein it is suggested that only about 94% of the emitted antineutrino flux was detected in short baseline experiments. We find that the form of the corrections that lead to the anomaly are very uncertain for the 30% of the flux that is determined by forbidden beta-decay transitions. This uncertainty was estimated in four ways and is larger than the size of the anomaly, and is unlikely to be reduced without accurate direct measurements of the antineutrino flux. Neutrino physics conclusions based on the original anomaly need to be revisited, as do oscillation analyses that assumed that the antineutrino flux is known to better than ~5%.

A. C. Hayes; J. L. Friar; G. T. Garvey; Guy Jonkmans

2013-09-17T23:59:59.000Z

177

Long-Term Trends in Surface Temperature over the Oceans  

Science Conference Proceedings (OSTI)

A limited comparison over the Northern Hemisphere oceans has been made between sea surface temperatures obtained from “Marine lkcks,” air temperatures over the ocean obtained from the same decks, and the historical file of hydrographic data. The ...

T. P. Barnett

1984-02-01T23:59:59.000Z

178

A Test for Nonlinearity in Temperature Proxy Records  

Science Conference Proceedings (OSTI)

Are temperature proxy records linear recorders of past temperature conditions? A statistical test for linearity is applied to 15 millennial-long proxy records with an annual resolution that was shown to significantly respond to Northern Hemisphere ...

Bård Støve; Fredrik Charpentier Ljungqvist; Peter Thejll

2012-10-01T23:59:59.000Z

179

Opposite Annular Responses of the Northern and Southern Hemispheres to Indian Ocean Warming  

Science Conference Proceedings (OSTI)

Atmospheric circulation changes during boreal winter of the second half of the twentieth century exhibit a trend toward the positive polarity of both the Northern Hemisphere annular mode (NAM) and the Southern Hemisphere annular mode (SAM). This ...

Shuanglin Li; Judith Perlwitz; Martin P. Hoerling; Xiaoting Chen

2010-07-01T23:59:59.000Z

180

Compensation of hemispheric albedo asymmetries by shifts of the ITCZ and tropical clouds  

Science Conference Proceedings (OSTI)

Despite a substantial hemispheric asymmetry in clear-sky albedo, observations of Earth’s radiation budget reveal that the two hemispheres have the same all-sky albedo. Here, aquaplanet simulations with the atmosphere general circulation model ...

Aiko Voigt; Bjorn Stevens; Jürgen Bader; Thorsten Mauritsen

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

The Search for Muon Neutrinos from Northern Hemisphere Gamma-Ray Bursts with AMANDA  

E-Print Network (OSTI)

see also the Swift Gamma-Ray Burst Mission Page: http://from Northern Hemisphere Gamma-Ray Bursts with AMANDA A.Northern Hemisphere Gamma-Ray Bursts with AMANDA The IceCube

Achterberg, A.; IceCube Collaboration

2008-01-01T23:59:59.000Z

182

Persistence of the 500 mb Height Field during Northern Hemisphere Winter  

Science Conference Proceedings (OSTI)

The persistence of the planetary-scale circulation during the Northern Hemisphere winters from 1965/66 to 1981/82 is documented. National Meteorological Center analyses of 500 mb geopotential height for the Northern Hemisphere poleward of 20°N ...

John D. Horel

1985-11-01T23:59:59.000Z

183

Interannual Variability and Trends of Extratropical Ozone. Part II: Southern Hemisphere  

Science Conference Proceedings (OSTI)

A principal component analysis (PCA) is applied to the Southern Hemisphere (SH) total column ozone following the method established for analyzing the data in the Northern Hemisphere (NH) in a companion paper. The interannual variability (IAV) of ...

Xun Jiang; Steven Pawson; Charles D. Camp; J. Eric Nielsen; Run-Lie Shia; Ting Liao; Varavut Limpasuvan; Yuk L. Yung

2008-10-01T23:59:59.000Z

184

Icelandic Coastal Sea Surface Temperature Records Constructed: Putting the Pulse on Air–Sea–Climate Interactions in the Northern North Atlantic. Part I: Comparison with HadISST1 Open-Ocean Surface Temperatures and Preliminary Analysis of Long-Term Patterns and Anomalies of SSTs around Iceland  

Science Conference Proceedings (OSTI)

A new comprehensive record of long-term Icelandic sea surface temperature measurements, which have been updated and filled in with reference to air temperature records, is presented. The new SST series reveal important features of the variability ...

Edward Hanna; Trausti Jónsson; Jon Ólafsson; Hedinn Valdimarsson

2006-11-01T23:59:59.000Z

185

The Optimal Growth of Tropical Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

It is argued from SST observations for the period 1950–90 that the tropical Indo-Pacific ocean-atmosphere system may be described as a stable linear dynamical system driven by spatially coherent Gaussian white noise. Evidence is presented that ...

Cécile Penland; Prashant D. Sardeshmukh

1995-08-01T23:59:59.000Z

186

Annual Temperature Anomalies for Three Latitude Bands, 1900-2012  

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

cover 30%, 40%, and 30% of the global area, respectively. image image image data Data Graphics Graphics Reference Hansen, J.E., R. Ruedy, M. Sato, and K. Lo. 2013. NASA GISS...

187

Radioactive anomaly discrimination from spectral ratios  

DOE Patents (OSTI)

A method for discriminating a radioactive anomaly from naturally occurring radioactive materials includes detecting a first number of gamma photons having energies in a first range of energy values within a predetermined period of time and detecting a second number of gamma photons having energies in a second range of energy values within the predetermined period of time. The method further includes determining, in a controller, a ratio of the first number of gamma photons having energies in the first range and the second number of gamma photons having energies in the second range, and determining that a radioactive anomaly is present when the ratio exceeds a threshold value.

Maniscalco, James; Sjoden, Glenn; Chapman, Mac Clements

2013-08-20T23:59:59.000Z

188

Holography and Anomaly Matching for Resonances  

E-Print Network (OSTI)

We derive a universal relation for the transverse part of triangle anomalies within a class of theories whose gravity dual is described by the Yang-Mills-Chern-Simons theory. This relation provides a set of sum rules involving the masses, decay constants and couplings between resonances, and leads to the formulas for the matrix elements of the vector and axial currents in the presence of the soft electromagnetic field. We also discuss that this relation is valid in real QCD at least approximately. This may be regarded as the anomaly matching for resonances as an analogue of that for the massless excitations in QCD.

Dam T. Son; Naoki Yamamoto

2010-10-04T23:59:59.000Z

189

Specifying Monthly Mean Surface Temperatures in Canada and Alaska from the 500 mb Height Field  

Science Conference Proceedings (OSTI)

Specification equations for monthly mean air temperature anomalies at 68 surface stations in Canada and Alaska are derived by applying a forward selection screening procedure to simultaneous monthly mean 500 mb height anomalies at 110 grid points ...

William H. Klein; Amir Shabbar; Runhua Yang

1989-06-01T23:59:59.000Z

190

Trace anomaly and Hawking effect in 2D dilaton gravity theories  

E-Print Network (OSTI)

We investigate the classical and semiclassical features of generic 2D, matter-coupled, dilaton gravity theories. In particular, we show that the mass, the temperature and the flux of Hawking radiation associated with 2D black holes are invariant under dilaton-dependent Weyl rescalings of the metric. The relationship between quantum anomalies and Hawking radiation is discussed.

Mariano Cadoni

1996-12-16T23:59:59.000Z

191

Equilibrium magnetic states in individual hemispherical permalloy caps  

Science Conference Proceedings (OSTI)

The magnetization distributions in individual soft magnetic permalloy caps on non-magnetic spherical particles with sizes ranging from 50 to 800 nm are investigated. We experimentally visualize the magnetic structures at the resolution limit of the x-ray magnetic circular dichroism photoelectron emission microscopy (XMCD-PEEM). By analyzing the so-called tail contrast in XMCD-PEEM, the spatial resolution is significantly enhanced, which allowed us to explore magnetic vortices and their displacement on curved surfaces. Furthermore, cap nanostructures are modeled as extruded hemispheres to determine theoretically the phase diagram of equilibrium magnetic states. The calculated phase diagram agrees well with the experimental observations.

Streubel, Robert; Schmidt, Oliver G. [Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden (Germany); Material Systems for Nanoelectronics, Chemnitz University of Technology, 09107 Chemnitz (Germany); Kravchuk, Volodymyr P.; Gaididei, Yuri [Bogolyubov Institute for Theoretical Physics, 03143 Kiev (Ukraine); Sheka, Denis D. [Radiophysics Faculty, Taras Shevchenko National University of Kiev, 01601 Kiev (Ukraine); Makarov, Denys [Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden (Germany); Kronast, Florian [Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH, 12489 Berlin (Germany)

2012-09-24T23:59:59.000Z

192

Performance evaluation of booster materials in the plastic bonded explosive PBX 9502 in a hemispherical wave breakout test  

Science Conference Proceedings (OSTI)

An explosive booster is normally required to initiate detonation in an insensitive high explosive (lHE). Booster materials must be ignitable by a conventional detonator and deliver sufficient energy and favorable pulse shape to initiate the IHE charge. The explosive booster should be as insensitive as reasonably possible to maintain the overall safety margin of the explosive assembly. A hemispherical wave breakout test termed the on ionskin test is one of the methods of testing the performance of booster materials in an initiation train assembly. There are several variations of this basic test which are known by other names. In this test, the wave breakout time-position history at the surface of a hemispherical IHE acceptor charge is recorded, and the relative uniformity of breakout allows qualitative comparison between booster candidates and quantitative comparison of several metrics. The results of a series of onionskin experiments evaluating the performance of some new booster formulations in the triaminotrinitrobenzene (TA TB) -based plastic bonded explosive PBX 9502 will be presented. The boosters were tested in an onionskin arrangement in which the booster pellet was cylindrical, and the tests were performed at a temperature of-55{sup o}C to emphasize variations in spreading performance. The modification from the traditional hemispherical geometry facilitated efficient explosive fabrication and charge assembly, but the results indicate that this geometry was not ideal for several reasons. Despite the complications arising from geometry, promising performance was observed from booster formulations including 3,3' -diamino-4,4'azoxyfurazan.

Hooks, Daniel E [Los Alamos National Laboratory; Morris, John S [Los Alamos National Laboratory; Hill, Larry G [Los Alamos National Laboratory; Francois, Elizabeth [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

193

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

194

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

195

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

196

ARM: Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, VISible channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

197

Benchmark Evaluation of Plutonium Hemispheres Reflected by Steel and Oil  

Science Conference Proceedings (OSTI)

During the period from June 1967 through September 1969 a series of critical experiments was performed at the Rocky Flats Critical Mass Laboratory with spherical and hemispherical plutonium assemblies as nested hemishells as part of a Nuclear Safety Facility Experimental Program to evaluate operational safety margins for the Rocky Flats Plant. These assemblies were both bare and fully or partially oil-reflected. Many of these experiments were subcritical with an extrapolation to critical configurations or critical at a particular oil height. Existing records reveal that 167 experiments were performed over the course of 28 months. Unfortunately, much of the data was not recorded. A reevaluation of the experiments had been summarized in a report for future experimental and computational analyses. This report examines only fifteen partially oil-reflected hemispherical assemblies. Fourteen of these assemblies also had close-fitting stainless-steel hemishell reflectors, used to determine the effective critical reflector height of oil with varying steel-reflector thickness. The experiments and their uncertainty in keff values were evaluated to determine their potential as valid criticality benchmark experiments of plutonium.

John Darrell Bess

2008-06-01T23:59:59.000Z

198

Gravity Waves Generated by Sheared Potential Vorticity Anomalies  

Science Conference Proceedings (OSTI)

The gravity waves (GWs) generated by potential vorticity (PV) anomalies in a rotating stratified shear flow are examined under the assumptions of constant vertical shear, two-dimensionality, and unbounded domain. Near a PV anomaly, the associated ...

François Lott; Riwal Plougonven; Jacques Vanneste

2010-01-01T23:59:59.000Z

199

An empirical comparison of monitoring algorithms for access anomaly detection  

Science Conference Proceedings (OSTI)

One of the major disadvantages of parallel programming with shared memory is the nondeterministic behavior caused by uncoordinated access to shared variables, known as access anomalies. Monitoring program execution to detect access anomalies ...

A. Dinning; E. Schonberg

1990-02-01T23:59:59.000Z

200

On the Prediction of India Monsoon Rainfall Anomalies  

Science Conference Proceedings (OSTI)

A complex of anomalies in the premonsoon large-scale circulation setting heralds the interannual variability of India summer monsoon rainfall. The most prominent precursors of precipitation anomalies are the latitude position of the upper-air ...

Stefan Hastenrath

1987-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

ADWICE – anomaly detection with real-time incremental clustering  

Science Conference Proceedings (OSTI)

Anomaly detection, detection of deviations from what is considered normal, is an important complement to misuse detection based on attack signatures. Anomaly detection in real-time places hard requirements on the algorithms used, making many proposed ... Keywords: adaptability, anomaly detection, clustering, intrusion detection, realtime

Kalle Burbeck; Simin Nadjm-Tehrani

2004-12-01T23:59:59.000Z

202

Challenging the supremacy of traffic matrices in anomaly detection  

Science Conference Proceedings (OSTI)

Multiple network-wide anomaly detection techniques proposed in the literature define an anomaly as a statistical outlier in aggregated network traffic. The most popular way to aggregate the traffic is as a Traffic Matrix, where the traffic is ... Keywords: anomaly detection, traffic aggregation

Augustin Soule; Fernando Silveira; Haakon Ringberg; Christophe Diot

2007-10-01T23:59:59.000Z

203

Data mining methods for anomaly detection KDD-2005 workshop report  

Science Conference Proceedings (OSTI)

For many applications, data mining systems are required to detect anomalous (abnormal, unmodeled, or unexpected) observations. This has so far proven to be a difficult challenge because anomalies are usually considered to be "non-normal" observations, ... Keywords: anomalies, data mining, detection of anomalies in data, machine learning

Dragos Margineantu; Stephen Bay; Philip Chan; Terran Lane

2005-12-01T23:59:59.000Z

204

Life Cycles of Persistent Anomalies. Part II: The Development of Persistent Negative Height Anomalies over the North Pacific Ocean  

Science Conference Proceedings (OSTI)

The present study extends our previous work on the life cycles of persistent anomalies by providing more comprehensive analyses of the synoptic and dynamical characteristics associated with the developments of the anomalies. We focus here on the ...

Randall M. Dole; Robert X. Black

1990-04-01T23:59:59.000Z

205

Index Cycles in the Northern Hemisphere during the Global Weather Experiment  

Science Conference Proceedings (OSTI)

An index cycle occurring in the Northern Hemisphere during the late winter and spring of 1979 has been examined in detail using the ECMWF Level IIIb data set.

John W. Kidson

1985-04-01T23:59:59.000Z

206

A Pronounced Upper-Tropospheric Warm Anomaly Encountered by the NOAA G-IV Aircraft in the Vicinity of Deep Convection  

Science Conference Proceedings (OSTI)

Recent flights near deep convection by the National Oceanic and Atmospheric Administration's Gulfstream-IV surveillance aircraft have occasionally experienced significant positive temperature anomalies that sometimes impact the aircraft ...

Robert Rogers; Sim Aberson; John Kaplan; Stan Goldenberg

2002-01-01T23:59:59.000Z

207

Flavorful hybrid anomaly-gravity mediation  

SciTech Connect

We consider supersymmetric models where anomaly and gravity mediation give comparable contributions to the soft terms and discuss how this can be realized in a five-dimensional brane world. The gaugino mass pattern of anomaly mediation is preserved in such a hybrid setup. The flavorful gravity-mediated contribution cures the tachyonic slepton problem of anomaly mediation. The supersymmetric flavor puzzle is solved by alignment. We explicitly show how a working flavor-tachyon link can be realized with Abelian flavor symmetries and give the characteristic signatures of the framework, including O(1) slepton mass splittings between different generations and between doublets and singlets. This provides opportunities for same flavor dilepton edge measurements with missing energy at the Large Hadron Collider (LHC). Rare lepton decay rates could be close to their current experimental limit. Compared to pure gravity mediation, the hybrid model is advantageous because it features a heavy gravitino which can avoid the cosmological gravitino problem of gravity-mediated models combined with leptogenesis.

Gross, Christian; Hiller, Gudrun [Institut fuer Physik, Technische Universitaet Dortmund, D-44221 Dortmund (Germany)

2011-05-01T23:59:59.000Z

208

Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe  

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

Capacitance Probe for Detection of Anomalies in Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking collaborative research and licensing partners interested in implementing United States Patent Number 7,839,282 entitled "Capacitance Probe for Detection of Anomalies in Nonmetallic Plastic Pipe." Disclosed in this patent is an analysis of materials using a capacitive sensor to detect anomalies in nonmetallic plastic pipe through comparison of measured capacitances. The capacitive sensor is used in conjunction with a capacitance measurement device, a location device, and a processor to generate a capacitance versus location output for the detection and localization of anomalies

209

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

Science Conference Proceedings (OSTI)

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

Robert E. Livezey; Kingtse C. Mo

1987-12-01T23:59:59.000Z

210

A New Perspective on Recent Global Warming: Asymmetric Trends of Daily Maximum and Minimum Temperature  

Science Conference Proceedings (OSTI)

Monthly mean maximum and minimum temperatures for over 50% (10%) of the Northern (Southern) Hemisphere landmass, accounting for 37% of the global landmass, indicate that the rise of the minimum temperature has occurred at a rate three times that ...

Thomas R. Karl; Richard W. Knight; Kevin P. Gallo; Thomas C. Peterson; Philip D. Jones; George Kukla; Neil Plummer; Vyacheslav Razuvayev; Janette Lindseay; Robert J. Charlson

1993-06-01T23:59:59.000Z

211

Variations in Surface Air Temperatures: Part 2. Arctic Regions, 1881–1980  

Science Conference Proceedings (OSTI)

We describe annual and seasonal changes in air temperatures over high latitudes of the Northern Hemisphere during the period 1881–1980. Trends (that is, fluctuations on time scales greater than 20 years) in the average temperature of the Arctic ...

P. M. Kelly; P. D. Jones; C. B. Sear; B. S. G. Cherry; R. K. Tavakol

1982-02-01T23:59:59.000Z

212

Interhemispheric Temperature Asymmetry over the Twentieth Century and in Future Projections  

Science Conference Proceedings (OSTI)

The temperature contrast between the Northern and Southern Hemispheres—the interhemispheric temperature asymmetry (ITA)—is an emerging indicator of global climate change, potentially relevant to the Hadley circulation and tropical rainfall. The ...

Andrew R. Friedman; Yen-Ting Hwang; John C. H. Chiang; Dargan M. W. Frierson

2013-08-01T23:59:59.000Z

213

Lag Relationships Involving Tropical Sea Surface Temperatures  

Science Conference Proceedings (OSTI)

A long historical record (100 years) of monthly sea surface temperature anomalies from the Comprehensive Ocean–Atmosphere Data Set was used to examined the lag relationships between different locations in the global Tropics. Application of ...

John R. Lanzante

1996-10-01T23:59:59.000Z

214

Satellite-Derived Maps of Snow Cover Frequency for the Northern Hemisphere  

Science Conference Proceedings (OSTI)

A satellite imagery-based Northern Hemisphere snow cover data archive was mapped for the period 1966–84: The maps were digitized in order to create the first hemispheric, spatially data-continuous climatologies of snow cover. Annual and monthly ...

Kenneth F. Dewey

1987-09-01T23:59:59.000Z

215

One-way implodable tag capsule with hemispherical beaded end cap for LWR fuel manufacturing  

DOE Patents (OSTI)

A capsule is described containing a tag gas in a zircaloy body portion having a hemispherical top curved toward the bottom of the body portion. The hemispherical top has a rupturable portion upon exposure to elevated gas pressure and the capsule is positioned within a fuel element in a nuclear reactor.

Gross, Kenny; Lambert, John

1997-12-01T23:59:59.000Z

216

Northern Hemisphere summer monsoon intensified by mega-El Nio/southern oscillation and Atlantic  

E-Print Network (OSTI)

Northern Hemisphere summer monsoon intensified by mega-El Niño/southern oscillation and Atlantic, and approved February 26, 2013 (received for review November 7, 2012) Prediction of monsoon changes, the causes of the decadal variability of Northern Hemisphere summer monsoon (NHSM) are largely unknown

Webster, Peter J.

217

Cloud-Base-Height Estimation from Paired Ground-Based Hemispherical Observations  

Science Conference Proceedings (OSTI)

Total-sky imager (TSI) and hemispheric-sky imager (HSI) each have a hemispherical field of view, and many TSIs are now deployed. These instruments have been used routinely to provide a time series of the fractional sky cover only. In this study, ...

Evgueni Kassianov; Charles N. Long; Jason Christy

2005-08-01T23:59:59.000Z

218

Solar-Cycle Characteristics Examined in Separate Hemispheres: Phase, Gnevyshev Gap, and Length of Minimum  

E-Print Network (OSTI)

Research results from solar-dynamo models show the northern and southern hemispheres may evolve separately throughout the solar cycle. The observed phase lag between the hemispheres provides information regarding the strength of hemispheric coupling. Using hemispheric sunspot-area and sunspot-number data from Cycles 12 - 23, we determine how out of phase the separate hemispheres are during the rising, maximum, and declining period of each solar cycle. Hemispheric phase differences range from 0 - 11, 0 - 14, and 2 - 19 months for the rising, maximum, and declining periods, respectively. The phases appear randomly distributed between zero months (in phase) and half of the rise (or decline) time of the solar cycle. An analysis of the Gnevyshev gap is conducted to determine if the double-peak is caused by the averaging of two hemispheres that are out of phase. We confirm previous findings that the Gnevyshev gap is a phenomenon that occurs in the separate hemispheres and is not due to a superposition of sunspot in...

Norton, A A

2010-01-01T23:59:59.000Z

219

Core-softened Fluids, Water-like Anomalies and the Liquid-Liquid Critical Points  

E-Print Network (OSTI)

Molecular dynamics simulations are used to examine the relationship between water-like anomalies and the liquid-liquid critical point in a family of model fluids with multi-Gaussian, core-softened pair interactions. The core-softened pair interactions have two length scales, such that the longer length scale associated with a shallow, attractive well is kept constant while the shorter length scale associated with the repulsive shoulder is varied from an inflexion point to a minimum of progressively increasing depth. As the shoulder well depth increases, the pressure required to form the high density liquid decreases and the temperature up to which the high-density liquid is stable increases, resulting in the shift of the liquid-liquid critical point to much lower pressures and higher temperatures. The pair correlation entropy is computed to show that the excess entropy anomaly diminishes when the shoulder well depth increases. Excess entropy scaling of diffusivity in this class of fluids is demonstrated, showing that decreasing strength of the excess entropy anomaly with increasing shoulder depth results in the progressive loss of water-like thermodynamic, structural and transport anomalies. Instantaneous normal mode analysis was used to index the overall curvature distribution of the fluid and the fraction of imaginary frequency modes was shown to correlate well with the anomalous behaviour of the diffusivity and the pair correlation entropy. The results suggest in the case of core-softened potentials, in addition to the presence of two length scales, energetic and entropic effects associated with local minima and curvatures of the pair interaction play an important role in determining the presence of water-like anomalies and the liquid-liquid phase transition.

Evy Salcedo; Alan B. de Oliveira; Ney M. Barraz Jr; Charusita Chakravarty; Marcia C. Barbosa

2011-03-21T23:59:59.000Z

220

Hemispherical Asymmetry of Tropical Precipitation in ECHAM5/MPI-OM during El Niño and under Global Warming  

Science Conference Proceedings (OSTI)

Similarities and differences between El Niño and global warming are examined in hemispherical and zonal tropical precipitation changes of the ECHAM5/Max Planck Institute Ocean Model (MPI-OM) simulations. Similarities include hemispherical ...

Chia Chou; Jien-Yi Tu

2008-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Machine Learning for Host-based Anomaly Detection by  

E-Print Network (OSTI)

Anomaly detection techniques complement signature based methods for intrusion detection. Machine learning approaches are applied to anomaly detection for automated learning and detection. Traditional host-based anomaly detectors model system call sequences to detect novel attacks. This dissertation makes four key contributions to detect host anomalies. First, we present an unsupervised approach to clean training data using novel representations for system call sequences. Second, supervised learning with system call arguments and other attributes is proposed for enriched modeling. Third, techniques to increase model coverage for improved accuracy are presented. Fourth, we propose spatio-temporal modeling to detect suspicious behavior for mobile hosts. Experimental results on various data sets indicate that our techniques are more effective than traditional methods in capturing attack-based host anomalies. Additionally, our supervised methods create succint models and the computational overhead incurred is reasonable for an online anomaly detection system. iii Acknowledgements An ancient saying in Sanskrit: Matri devo bhava (revere your mother), pitri devo

Gaurav Tandon; Gaurav Tandon; Philip K. Chan, Ph.D.; Marius C. Silaghi, Ph.D.; Georgios C. Anagnostopoulos, Ph.D.; Gaurav Tandon; Dissertation Advisor; Philip K. Chan, Ph.D.

2008-01-01T23:59:59.000Z

222

Lester Meadow, Washington- A Geothermal Anomaly | Open Energy Information  

Open Energy Info (EERE)

Lester Meadow, Washington- A Geothermal Anomaly Lester Meadow, Washington- A Geothermal Anomaly Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Lester Meadow, Washington- A Geothermal Anomaly Details Activities (2) Areas (1) Regions (0) Abstract: Exploration of the Lester Hot Springs for geothermal potential found that a natural meadow adjacent to the hot springs represents a geothermal anomaly. This conclusion is supported by an anomaly in a thermal infrared survey, high levels of fluorine and boron from a soil survey, and the lack forest cover in the Lester meadow. These vegetation anomalies may be more common in the Cascade Mountains than realized and may be a useful indicator of the extent of geothermal activity at a location. Burlington Northern (BN) started conducting geothermal exploration in 1974 once the

223

ARM: Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, low-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

224

ARM: Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, high-sun angles [a0 data is uncalibrated  

DOE Data Explorer (OSTI)

Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

225

ARM: Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, low-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, low-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

226

ARM: Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, high-sun angles [a0 data is uncalibrated  

SciTech Connect

Shortwave Array Spectroradiometer-Hemispheric, Near-InfraRed channel, high-sun angles [a0 data is uncalibrated

Connor Flynn

2011-03-22T23:59:59.000Z

227

3D Magnetotelluric Characterization Of The Geothermal Anomaly...  

Open Energy Info (EERE)

where it can be associated with structural conditions, especially to the extensional event suffered by the island after the Alpine Orogeny. However, the origin of this anomaly...

228

IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD...  

Open Energy Info (EERE)

IN SEARCH FOR THERMAL ANOMALIES IN THE COSO GEOTHERMAL FIELD (CALIFORNIA) USING REMOTE SENSING AND FIELD DATA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home...

229

A Shallow Attenuating Anomaly Inside The Ring Fracture Of The...  

Open Energy Info (EERE)

Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Caldera, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Shallow...

230

Global Interannual Variations in Sea Surface Temperature and Land Surface Vegetation, Air Temperature, and Precipitation  

Science Conference Proceedings (OSTI)

Anomalies in global vegetation greenness, SST, land surface air temperature, and precipitation exhibit linked, low-frequency interannual variations. These interannual variations were detected and analyzed for 1982–90 with a multivariate spectral ...

Sietse O. Los; G. James Collatz; Lahouari Bounoua; Piers J. Sellers; Compton J. Tucker

2001-04-01T23:59:59.000Z

231

The Impact of Tropical Indian Ocean Variability on Summer Surface Air Temperature in China  

Science Conference Proceedings (OSTI)

Evidence is presented that the boreal summer surface air temperature over south China and northeast China is remotely influenced by the Indian Ocean Basin mode (IOBM) sea surface temperature (SST) anomalies. Above-normal temperature in south China ...

Kaiming Hu; Gang Huang; Ronghui Huang

2011-10-01T23:59:59.000Z

232

Surface Air Temperature Variations in the Amazon Region and Its Borders during This Century  

Science Conference Proceedings (OSTI)

Monthly average surface air temperature records from 17 stations in the Brazilian Amazon from 1913 to 1995 were used to compute annual air temperature means. The data were converted into temperature anomalies, as the differences between annual ...

R. L. Victoria; L. A. Martinelli; J. M. Moraes; M. V. Ballester; A. V. Krusche; G. Pellegrino; R. M. B. Almeida; J. E. Richey

1998-05-01T23:59:59.000Z

233

Teleconnective Response of the Pacific–North American Region Atmosphere to Large Central Equatorial Pacific SST Anomalies  

Science Conference Proceedings (OSTI)

A prominent year-round ensemble response to a global sea surface temperature (SST) anomaly field fixed to that for January 1992 (near the peak of a major warm El Niño–Southern Oscillation episode) was observed in a 20-yr integration of the ...

Robert E. Livezey; Michiko Masutani; Ants Leetmaa; Hualan Rui; Ming Ji; Arun Kumar

1997-08-01T23:59:59.000Z

234

The Puzzle of the Flyby Anomaly  

E-Print Network (OSTI)

Close planetary flybys are frequently employed as a technique to place spacecraft on extreme solar system trajectories that would otherwise require much larger booster vehicles or may not even be feasible when relying solely on chemical propulsion. The theoretical description of the flybys, referred to as gravity assists, is well established. However, there seems to be a lack of understanding of the physical processes occurring during these dynamical events. Radio-metric tracking data received from a number of spacecraft that experienced an Earth gravity assist indicate the presence of an unexpected energy change that happened during the flyby and cannot be explained by the standard methods of modern astrodynamics. This puzzling behavior of several spacecraft has become known as the flyby anomaly. We present the summary of the recent anomalous observations and discuss possible ways to resolve this puzzle.

Slava G. Turyshev; Viktor T. Toth

2009-07-23T23:59:59.000Z

235

Chameleon effect and the Pioneer anomaly  

E-Print Network (OSTI)

The possibility that the apparent anomalous acceleration of the Pioneer 10 and 11 spacecraft may be due, at least in part, to a chameleon field effect is examined. A small spacecraft, with no thin shell, can have a more pronounced anomalous acceleration than a large compact body, such as a planet, having a thin shell. The chameleon effect seems to present a natural way to explain the differences seen in deviations from pure Newtonian gravity for a spacecraft and for a planet, and appears to be compatible with the basic features of the Pioneer anomaly, including the appearance of a jerk term. However, estimates of the size of the chameleon effect indicate that its contribution to the anomalous acceleration is negligible. We conclude that any inverse-square component in the anomalous acceleration is more likely caused by an unmodelled reaction force from solar-radiation pressure, rather than a chameleon field effect.

John D. Anderson; J. R. Morris

2012-04-12T23:59:59.000Z

236

Breaks in the Asian Monsoon: The Influence of Southern Hemisphere Weather Systems  

Science Conference Proceedings (OSTI)

Atmospheric model results suggest that chaotic weather systems in the Southern Hemisphere midlatitudes can trigger “breaks” in the Indian monsoon rainfall. Indeed, the mechanism may be able to trigger a more general break of the entire Asian ...

Mark J. Rodwell

1997-11-01T23:59:59.000Z

237

Hemispherical Reflectance Variations of Vegetation Canopies and Implications for Global and Regional Energy Budget Studies  

Science Conference Proceedings (OSTI)

The variations of spectral hemispherical reflectance (albedo) in vegetation canopies were studied as a function of solar zenith angle, leaf area index, led orientation distribution, and leaf and soil optical, properties. A three dimensional ...

D. S. Kimes; P. J. Sellers; W. W. Newcomb

1987-08-01T23:59:59.000Z

238

Trend in Northern Hemisphere Winter Atmospheric Circulation during the Last Half of the Twentieth Century  

Science Conference Proceedings (OSTI)

During the last half century, the trend in the Northern Hemisphere tropospheric circulation has been associated with a deepening of both the Aleutian and Icelandic lows, a pattern akin to the “Cold Ocean Warm Land” (COWL) pattern. A simplified ...

Jian Lu; Richard J. Greatbatch; K. Andrew Peterson

2004-10-01T23:59:59.000Z

239

An Examination of Observed Southern Oscillation Effects in the Northern Hemisphere Stratosphere  

Science Conference Proceedings (OSTI)

The effects of the Southern Oscillation on the December-February mean circulation in the Northern Hemisphere stratosphere were investigated using 34 years of data. No evidence for a significant relation between the Southern Oscillation (SO) and ...

Kevin Hamilton

1993-10-01T23:59:59.000Z

240

Remarks on Northern Hemisphere Forecast Error Sensitivity from 1996 to 2000  

Science Conference Proceedings (OSTI)

The sensitivity of 2-day Northern Hemisphere extratropical forecast errors to changes in initial conditions, computed daily over a 4-yr period, is documented. The sensitivity is computed using the (dry) adjoint of the Navy Operational Global ...

C. A. Reynolds; R. Gelaro

2001-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

NOGAPS-ALPHA Simulations of the 2002 Southern Hemisphere Stratospheric Major Warming  

Science Conference Proceedings (OSTI)

A high-altitude version of the Navy Operational Global Atmospheric Prediction System (NOGAPS) spectral forecast model is used to simulate the unusual September 2002 Southern Hemisphere stratospheric major warming. Designated as NOGAPS-Advanced ...

Douglas R. Allen; Lawrence Coy; Stephen D. Eckermann; John P. McCormack; Gloria L. Manney; Timothy F. Hogan; Young-Joon Kim

2006-02-01T23:59:59.000Z

242

LEFT VERSUS RIGHT HEMISPHERE DIFFERENCES IN BRAIN CONNECTIVITY: 4-TESLA HARDI TRACTOGRAPHY IN 569 TWINS  

E-Print Network (OSTI)

LEFT VERSUS RIGHT HEMISPHERE DIFFERENCES IN BRAIN CONNECTIVITY: 4-TESLA HARDI TRACTOGRAPHY IN 569) and 112 adolescents (age 12-16) with 4-Tesla 105-gradient high- angular resolution diffusion imaging. We

Thompson, Paul

243

Separating the Dynamical Effects of Climate Change and Ozone Depletion. Part II: Southern Hemisphere Troposphere  

Science Conference Proceedings (OSTI)

The separate effects of ozone depleting substances (ODSs) and greenhouse gases (GHGs) on forcing circulation changes in the Southern Hemisphere extratropical troposphere are investigated using a version of the Canadian Middle Atmosphere Model (...

Charles McLandress; Theodore G. Shepherd; John F. Scinocca; David A. Plummer; Michael Sigmond; Andreas I. Jonsson; M. Catherine Reader

2011-03-01T23:59:59.000Z

244

Northern Hemispheric Interannual Teleconnection Patterns and Their Changes Due to the Greenhouse Effect  

Science Conference Proceedings (OSTI)

Observed and general circulation climate model (GCM) simulated interannual teleconnection patterns in the Northern Hemisphere are compared on a monthly basis. The study was based on 1946–1991 observations and two separate 100-year simulations ...

Xin-Zhong Liang; Wei-Chyung Wang; Michael P. Dudek

1996-02-01T23:59:59.000Z

245

Some Synoptic Indices of the Southern Hemisphere Mean Sea Level Circulation 1972–77  

Science Conference Proceedings (OSTI)

A set of 10 synoptic indices for the Southern Hemisphere is presented based on the first five years of numerical analysis by the Australian Bureau of Meteorology. The indices describe the characteristics and variability of the monthly and ...

N. A. Streten

1980-01-01T23:59:59.000Z

246

Evaluation of Northern Hemisphere Blocking Climatology in the Global Environment Multiscale Model  

Science Conference Proceedings (OSTI)

The performance of the Global Environmental Multiscale (GEM) model, the Canadian operational numerical model, in reproducing atmospheric low-frequency variability is evaluated in the context of Northern Hemisphere blocking climatology. The ...

Etienne Dunn-Sigouin; Seok-Woo Son; Hai Lin

2013-02-01T23:59:59.000Z

247

Formation of Southern Hemisphere Thermocline Waters: Water Mass Conversion and Subduction  

Science Conference Proceedings (OSTI)

The ventilation of the permanent thermocline of the Southern Hemisphere gyres is quantified using climatological and synoptic observational data. Ventilation is estimated with three independent methods: the kinematic method provides subduction ...

Johannes Karstensen; Detlef Quadfasel

2002-11-01T23:59:59.000Z

248

The Splitting of the Stratospheric Polar Vortex in the Southern Hemisphere, September 2002: Dynamical Evolution  

Science Conference Proceedings (OSTI)

The polar vortex of the Southern Hemisphere (SH) split dramatically during September 2002. The large-scale dynamical effects were manifest throughout the stratosphere and upper troposphere, corresponding to two distinct cyclonic centers in the ...

Andrew J. Charlton; Alan O’Neill; William A. Lahoz; Paul Berrisford

2005-03-01T23:59:59.000Z

249

Preferred and Unpreferred Circulation Types in the Northern Hemisphere Wintertime Phase space  

Science Conference Proceedings (OSTI)

This study addresses two questions: 1) whether there are local density maxima and minima in the Northern Hemisphere extratropical wintertime circulation phase space and 2) if so, what the preferred circulation types are. All investigations are ...

Zoltan Toth

1993-09-01T23:59:59.000Z

250

Observed Decadal Changes in Downward Wave Coupling between the Stratosphere and Troposphere in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

Downward wave coupling dominates the intraseasonal dynamical coupling between the stratosphere and troposphere in the Southern Hemisphere. The coupling occurs during late winter and spring when the stratospheric basic state forms a well-defined ...

Nili Harnik; Judith Perlwitz; Tiffany A. Shaw

2011-09-01T23:59:59.000Z

251

Quasi-Linear Blocks Forced by Orography in a Hemispheric, Quasi-Geostrophic Barotropic Model  

Science Conference Proceedings (OSTI)

Stationary linear perturbation responses to Northern Hemisphere orography are calculated in a quasi-geostrophic barotropic model in solid-body rotation. The stationary mountain torque induced by these perturbations is then used to construct ...

John O. Roads

1981-07-01T23:59:59.000Z

252

On the Establishment of Stationary Waves in the Northern Hemisphere Winter  

Science Conference Proceedings (OSTI)

The establishment of stationary waves in the Northern Hemisphere winter is investigated using stationary and time-dependent linear primitive equation models. Confirming the results of Nigam and Lindzen, we find that small displacements of the ...

Arlindo M. Da Silva; Richard S. Lindzen

1993-01-01T23:59:59.000Z

253

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

Science Conference Proceedings (OSTI)

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

Kingtse C. Mo; R. Wayne Higgins

1998-06-01T23:59:59.000Z

254

Modes of Interannual Variability of the Southern Hemisphere Circulation Simulated by the CSIRO Climate Model  

Science Conference Proceedings (OSTI)

This study examines the capability of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) climate model in simulating the observed modes of interannual variability of the Southern Hemisphere circulation. Modes of variability ...

Wenju Cai; Ian G. Watterson

2002-05-01T23:59:59.000Z

255

A Zonal Wavenumber 3 Pattern of Northern Hemisphere Wintertime Planetary Wave Variability at High Latitudes  

Science Conference Proceedings (OSTI)

A prominent pattern of variability of the Northern Hemisphere wintertime tropospheric planetary waves, referred to here as the Wave3 pattern, is identified from the NCEP–NCAR reanalysis. It is worthy of attention because its structure is similar ...

Haiyan Teng; Grant Branstator

2012-10-01T23:59:59.000Z

256

Numerical Weather Prediction Studies from the FGGE Southern Hemisphere Data Base  

Science Conference Proceedings (OSTI)

The quality of numerical weather prediction available for the Southern Hemisphere from the FGGE data base has been examined. The Australian Numerical Meteorology Research Centre (ANMRC) spectral prediction model has been initialized with analyses ...

W. Bourke; K. Puri; R. Seaman

1982-12-01T23:59:59.000Z

257

A Technique for Mapping the Distribution of Diffuse Solar Radiation over the Sky Hemisphere  

Science Conference Proceedings (OSTI)

A technique to map the distribution of diffuse solar radiation over the sky hemisphere is described. The method is based on an analysis of all-sky, visible photographs and concurrent actinometric measurements of diffuse solar radiance. The ...

L. J. Bruce McArthur; John E. Hay

1981-04-01T23:59:59.000Z

258

A Diagnosis of Two Blocking Events That Occurred Simultaneously in the Midlatitude Northern Hemisphere  

Science Conference Proceedings (OSTI)

Using the Goddard Laboratory for Atmospheres Goddard Earth Observing System-1 analyses, the horizontal distribution of atmospheric forcing processes involved in the growth, maintenance, and decay of two Northern Hemisphere midlatitude blocking ...

Anthony R. Lupo

1997-08-01T23:59:59.000Z

259

Relationship between Tropical Heating and Subtropical Westerly Maxima in the Southern Hemisphere during SOP-1, FGGE  

Science Conference Proceedings (OSTI)

FGGE Level III-b analyses, produced by the Goddard Laboratory for Atmospheres, NASA, are used to investigate the relationship between tropical heating and subtropical westerly maxima in the Southern Hemisphere during SOP-1 (5 January-4 March 1979)...

James W. Hurrell; Dayton G. Vincent

1990-07-01T23:59:59.000Z

260

Eliassen-Palm Cross Sections for the Northern and Southern Hemispheres  

Science Conference Proceedings (OSTI)

Eliassen-Palm cross sections and residual meridional circulations are presented for the Northern and Southern Hemispheres for summer and winter based on the data of Newell et al. (1972, 1974). The cross sections are similar to those presented by ...

David J. Karoly

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Characteristic Patterns of Variability of Sea Level Pressure in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Seasonal and annual mean sea level pressures for the Northern Hemisphere have been analyzed to determine the dominant modes of interannual and longer period variability using monthly sea level pressure analyses as revised by Trenberth and Paolino ...

Kevin E. Trenberth; Daniel A. Paolino Jr.

1981-06-01T23:59:59.000Z

262

Missing Stratospheric Ozone Decrease at Southern Hemisphere Middle Latitudes after Mt. Pinatubo: A Dynamical Perspective  

Science Conference Proceedings (OSTI)

Although large total ozone decreases occurred in the Northern Hemisphere extratropics in the years after the volcanic eruption of Mt. Pinatubo that are generally attributed to the eruption, comparable decreases did not emerge in the Southern ...

C. Schnadt Poberaj; J. Staehelin; D. Brunner

2011-09-01T23:59:59.000Z

263

Estimates of the Seasonal Mean Vertical Velocity Fields of the Extratropical Northern Hemisphere  

Science Conference Proceedings (OSTI)

Wintertime and summertime mean 500 mb vertical velocity fields for the extratropical Northern Hemisphere are calculated by several methods from general circulation statistics compiled from National Meteorological Center (NMC) operational analyses ...

Glenn H. White

1983-07-01T23:59:59.000Z

264

Modulation of Southern Oscillation-Northern Hemisphere Mid-Winter Climate Relationships by the QBO  

Science Conference Proceedings (OSTI)

A possible relationship between the phase of the Quasi-Biennial Oscillation (QBO) and the effect of the Southern Oscillation (SO) on the January-February climate in the Northern Hemisphere is examined. Findings suggest a preference for the ...

Anthony G. Barnston; Robert E. Livezey; Michael S. Halpert

1991-02-01T23:59:59.000Z

265

Surface Circulation and Kinetic Energy Distributions in the Southern Hemisphere Oceans from FGGE Drifting Buoys  

Science Conference Proceedings (OSTI)

Trajectories of approximately 300 satellite-tracked drifting buoys deployed throughout the Southern Hemisphere oceans during the Fiat GARP Global Experiment (FGGE) have been analyzed to infer the mean surface circulation and kinetic energy ...

Steven L. Patterson

1985-07-01T23:59:59.000Z

266

The Pacific Center of Action of the Northern Hemisphere Annular Mode: Real or Artifact?  

Science Conference Proceedings (OSTI)

The leading empirical orthogonal function (EOF) of the sea level pressure (SLP) field, referred to as the Arctic Oscillation (AO) or Northern Hemisphere annular mode (NAM), consists of a dipole between the polar cap region and the surrounding ...

John M. Wallace; David W. J. Thompson

2002-07-01T23:59:59.000Z

267

Mean Southern Hemisphere Extratropical Cyclone Behavior in the 40-Year NCEP–NCAR Reanalysis  

Science Conference Proceedings (OSTI)

This paper presents a new climatology of Southern Hemisphere (SH) extratropical cyclones. This has been compiled by applying a state-of-the-art cyclone tracking scheme to the 6-hourly National Centers for Environmental Prediction–National Center ...

Ian Simmonds; Kevin Keay

2000-03-01T23:59:59.000Z

268

Precipitation and Water Vapor Transport in the Southern Hemisphere with Emphasis on the South American Region  

Science Conference Proceedings (OSTI)

December–March climatologies of precipitation and vertically integrated water vapor transport were analyzed and compared to find the main paths by which moisture is fed to high-rainfall regions in the Southern Hemisphere in this season. The ...

Josefina Moraes Arraut; Prakki Satyamurty

2009-09-01T23:59:59.000Z

269

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

Science Conference Proceedings (OSTI)

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

Andrew Hoell; Mathew Barlow; Roop Saini

270

Interdecadal Trend and ENSO-Related Interannual Variability in Southern Hemisphere Blocking  

Science Conference Proceedings (OSTI)

The interdecadal trend and ENSO-related interannual variability in the frequency and intensity of atmospheric blocking in the Southern Hemisphere are analyzed by a statistical model that takes account of serial correlation in the datasets. ...

Li Dong; Timothy J. Vogelsang; Stephen J. Colucci

2008-06-01T23:59:59.000Z

271

Observed Southern Hemisphere Eddy Statistics at 500 mb: Frequency and Spatial Dependence  

Science Conference Proceedings (OSTI)

Nearly eight years of daily Southern Hemisphere analyses at 500 mb have been used to define the spatial dependence of the variance fields of geopotential height and the two geostrophic wind components, the corresponding covariance fields, and the ...

Kevin E. Trenberth

1981-12-01T23:59:59.000Z

272

A Comparison of Southern Hemisphere Circulation Statistics Based on GFDL and Australian Analyses  

Science Conference Proceedings (OSTI)

Two sets of observed atmospheric circulation statistics for the Southern Hemisphere (SH) are compared. The first set was compiled at the Geophysical Fluid Dynamics laboratory (GFDL) and consists of global objective analyses of circulation ...

David J. Karoly; Abraham H. Oort

1987-09-01T23:59:59.000Z

273

Two Types of Baroclinic Life Cycles during the Southern Hemisphere Summer  

Science Conference Proceedings (OSTI)

Baroclinic eddy life cycles of the Southern Hemisphere (SH) summer are investigated with NCEP–NCAR reanalysis data. A composite analysis is performed for the years 1980 through 2004. Individual life cycles are identified by local maxima in ...

Woosok Moon; Steven B. Feldstein

2009-05-01T23:59:59.000Z

274

The Life Cycle of Northern Hemisphere Downward Wave Coupling between the Stratosphere and Troposphere  

Science Conference Proceedings (OSTI)

The life cycle of Northern Hemisphere downward wave coupling between the stratosphere and troposphere via wave reflection is analyzed. Downward wave coupling events are defined by extreme negative values of a wave coupling index based on the ...

Tiffany A. Shaw; Judith Perlwitz

2013-03-01T23:59:59.000Z

275

Is the Atmosphere Interesting? A Projection Pursuit Study of the Circulation in the Northern Hemisphere Winter  

Science Conference Proceedings (OSTI)

The Northern Hemisphere winter circulation is probed for deviations from Gaussianity. A projection pursuit approach is applied that searches for directions in phase space that maximize an index of interest. Different indices gauging different ...

Bo Christiansen

2009-03-01T23:59:59.000Z

276

Detection of Inter-hemispheric Asymmetries of Brain Perfusion in SPECT  

Science Conference Proceedings (OSTI)

This paper describes an unsupervised method to help detection of significant functional inter-hemispheric asymmetries in brain SPECT. A validation of this method was performed with realistic simulated SPECT data sets with known asymmetries (in size and ...

Bérengère Aubert-Broche; Christophe Grova; Pierre Jannin; Irène Buvat; Habib Benali; Bernard Gibaud

2002-09-01T23:59:59.000Z

277

Dynamics of Planetary-Scale Baroclinic Waves during Southern Hemisphere Winter  

Science Conference Proceedings (OSTI)

An investigation is conducted of the characteristics of linear and finite amplitude baroclinic waves during Southern Hemisphere winter. Emphasis is placed on the dynamics of planetary scale modes, which propagate into the stratosphere. Linear ...

Richard E. Young; Howard Houben

1989-05-01T23:59:59.000Z

278

Interannual and Decadal Variations of Planetary Wave Activity, Stratospheric Cooling, and Northern Hemisphere Annular Mode  

Science Conference Proceedings (OSTI)

Using NCEP–NCAR 51-yr reanalysis data, the interannual and decadal variations of planetary wave activity and its relationship to stratospheric cooling, and the Northern Hemisphere Annular mode (NAM), are studied. It is found that winter ...

Yongyun Hu; Ka Kit Tung

2002-07-01T23:59:59.000Z

279

Seasonal Variations in the Vertically Integrated Water Vapor Transport Fields over the Southern Hemisphere  

Science Conference Proceedings (OSTI)

Seasonal mean fields of precipitable water and the zonal and meridional components of the vertically integrated atmospheric water vapor transport fields are calculated from five years of Southern Hemisphere data (1 September 1973 through 31 ...

David A. Howarth

1983-06-01T23:59:59.000Z

280

What Drives the Seasonal Onset and Decay of the Western Hemisphere Warm Pool?  

Science Conference Proceedings (OSTI)

The annual heat budget of the Western Hemisphere warm pool (WHWP) is explored using the output of an ocean general circulation model (OGCM) simulation. According to the analysis, the WHWP cannot be considered as a monolithic whole with a single ...

S-K. Lee; D. B. Enfield; C. Wang

2007-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Autumn Precipitation Trends over Southern Hemisphere Midlatitudes as Simulated by CMIP5 Models  

Science Conference Proceedings (OSTI)

In recent decades, Southern Hemisphere midlatitude regions such as southern Africa, southeastern Australia, and southern Chile have experienced a reduction in austral autumn precipitation; the cause of which is poorly understood. This study ...

Ariaan Purich; Tim Cowan; Seung-Ki Min; Wenju Cai

2013-11-01T23:59:59.000Z

282

Simulation and Projection of the Southern Hemisphere Annular Mode in CMIP5 Models  

Science Conference Proceedings (OSTI)

Climate variability in the Southern Hemisphere (SH) extratropical regions is dominated by the SH Annular Mode (SAM). Future changes in the SAM could have a large influence on climate over broad regions. In this paper, we utilized model simulations ...

Fei Zheng; Jianping Li; Robin T. Clark; Hyacinth C. Nnamchi

283

Interannual Variability in the Southern Hemisphere Circulation Organized by Stratospheric Final Warming Events  

Science Conference Proceedings (OSTI)

A composite observational analysis is presented demonstrating that austral stratospheric final warming (SFW) events provide a substantial organizing influence upon the large-scale atmospheric circulation in the Southern Hemisphere. In particular, ...

Robert X. Black; Brent A. McDaniel

2007-08-01T23:59:59.000Z

284

Variability in Southern Hemisphere Ocean Circulation from the 1980s to the 2000s  

Science Conference Proceedings (OSTI)

Interannual-to-decadal variability of ocean circulation in the Southern Hemisphere was examined using data from the 1980s to the 2000s in a box inverse model to estimate transport across hydrographic sections and three ocean general circulation ...

K. Katsumata; S. Masuda

2013-09-01T23:59:59.000Z

285

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

Science Conference Proceedings (OSTI)

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

Michael Ghil; Kingtse Mo

1991-03-01T23:59:59.000Z

286

The Structure and Maintenance of Stationary Waves in the Winter Northern Hemisphere  

Science Conference Proceedings (OSTI)

Previous studies of extratropical stationary waves in the winter Northern Hemisphere (NH) often focused on effects of orography and land–ocean thermal contrast on the formation, structure, and maintenance of these waves. In contrast, research ...

Tsing-Chang Chen

2005-10-01T23:59:59.000Z

287

Characteristics of Wave Packets in the Upper Troposphere. Part II: Seasonal and Hemispheric Variations  

Science Conference Proceedings (OSTI)

Gridded 300-hPa meridional wind data produced by the ECMWF reanalysis project were analyzed to document the seasonal and hemispheric variations in the properties of upper-tropospheric wave packets. The properties of the wave packets are mainly ...

Edmund K. M. Chang

1999-06-01T23:59:59.000Z

288

An Observational Study of the Final Breakdown of the Southern Hemisphere Stratospheric Vortex in 2002  

Science Conference Proceedings (OSTI)

The 2002 Southern Hemisphere final warming occurred early, following an unusually active winter and the first recorded major warming in the Antarctic. The breakdown of the stratospheric polar vortex in October and November 2002 is examined using ...

Yvan J. Orsolini; Cora E. Randall; Gloria L. Manney; Douglas R. Allen

2005-03-01T23:59:59.000Z

289

Intraseasonal Interactions between the Tropics and Extratropics in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

The mechanics of the interaction between tropical beating [estimated from outgoing longwave radiation (OLR)] and Southern Hemisphere (SH) subtropical and extratropical circulations on intraseasonal time scales are discussed. Base points are ...

Ernesto H. Berbery; Julia Nogués-Paegle

1993-07-01T23:59:59.000Z

290

Impact of Surface Forcing on Southern Hemisphere Atmospheric Blocking in the Australia-New Zealand Sector  

Science Conference Proceedings (OSTI)

Characteristics of atmospheric blocking in the Southern Hemisphere (SH) are explored in atmospheric general circulation model (AGCM) simulations with the Community Atmosphere Model, version 3, with a particular focus on the Australia-New Zealand ...

Caroline C. Ummenhofer; Peter C. McIntosh; Michael J. Pook; James S. Risbey

291

The Northern Hemisphere Sea-Level Pressure Data Set: Trends, Errors and Discontinuities  

Science Conference Proceedings (OSTI)

A detailed examination of the Northern Hemisphere monthly mean sea-level grid-point pressures shows a disappointingly large number of problems. The data set extends from 1899–1977 but has originated from eight different sources and ...

Kevin E. Trenberth; Daniel A. Paolino Jr.

1980-07-01T23:59:59.000Z

292

Southern Hemisphere Annular Mode Variability and the Role of Optimal Nonmodal Growth  

Science Conference Proceedings (OSTI)

The southern annular mode is the leading mode of Southern Hemisphere circulation variability, the temporal evolution of which is characterized by large amplitudes and significant persistence. Previous investigators have suggested a positive ...

Harun A. Rashid; Ian Simmonds

2005-06-01T23:59:59.000Z

293

A 10-Year Climatology of Northern Hemisphere Tropical Cloud Plumes and Their Composite Flow Patterns  

Science Conference Proceedings (OSTI)

A 10-year cool season climatology of tropical cloud plumes in the Northern Hemisphere was generated by visual inspection of infrared satellite imagery. The sample included 1062 plume events during the months of October to May for the years 1974 ...

Haig Iskenderian

1995-06-01T23:59:59.000Z

294

An Examination of Possible Solar Cycle-QBO Effects in the Northern Hemisphere Troposphere  

Science Conference Proceedings (OSTI)

Recent studies of correlations between solar flux and Northern Hemisphere wintertime tropospheric fields have suggested that sun-weather effects at the solar-cycle time scale may exist and be mediated by the phase of the quasi-biennial ...

David E. Venne; Denis G. Dartt

1990-02-01T23:59:59.000Z

295

Autumn precipitation trends over Southern Hemisphere midlatitudes as simulated by CMIP5 models  

Science Conference Proceedings (OSTI)

In recent decades, Southern Hemisphere midlatitude regions such as southern Africa, southeastern Australia and southern Chile have experienced a reduction in austral autumn precipitation; the cause of which is poorly understood. This study focuses ...

Ariaan Purich; Tim Cowan; Seung-Ki Min; Wenju Cai

296

Time discretisation applied to anomaly detection in a marine engine  

Science Conference Proceedings (OSTI)

An introduction to the problems associated with anomaly detection in a marine engine, explaining the benefits that the SAX representation brings to the field. Despite limitations in accuracy of the SAX representation in comparison with the normalised ... Keywords: anomaly detection, discretisation, symbolic aggregate approximation, time series

Ian Morgan; Honghai Liu; George Turnbull; David Brown

2007-09-01T23:59:59.000Z

297

Detection of process anomalies using an improved statistical learning framework  

Science Conference Proceedings (OSTI)

Maintenance technologies have been progressed from a time-based to a condition-based manner. The fundamental idea of condition-based maintenance (CBM) is built on the real-time diagnosis of impending failures and/or the prognosis of residual lifetime ... Keywords: Condition-based maintenance, Kernel regression, Process anomalies, Sensor anomalies, Statistical learning

Sang Ha An; Gyunyoung Heo; Soon Heung Chang

2011-03-01T23:59:59.000Z

298

EbAT: online methods for detecting utility cloud anomalies  

Science Conference Proceedings (OSTI)

The online detection of anomalies is a vital element of operations in datacenters and in utility clouds like Amazon EC2. Given ever-increasing data center sizes coupled with the complexities of systems software, applications, and workload patterns, such ... Keywords: anomaly detection, entropy, utility cloud, utility datacenter

Chengwei Wang

2009-11-01T23:59:59.000Z

299

ENSO anomalies over the Western United States: present and future patterns in regional climate simulations  

Science Conference Proceedings (OSTI)

Surface temperature, precipitation, specific humidity and wind anomalies associated with the warm and cold phases of ENSO simulated by WRF and HadRM are examined for the present and future decades. WRF is driven by ECHAM5 and CCSM3, respectively, and HadRM is driven by HadCM3. For the current decades, all simulations show some capability in resolving the observed warm-dry and coolwet teleconnection patterns over the PNW and the Southwest U.S. for warm and cold ENSO. Differences in the regional simulations originate primarily from the respective driving fields. For the future decades, the warm-dry and cool-wet teleconnection patterns in association with ENSO are still represented in ECHAM5-WRF and HadRM. However, there are indications of changes in the ENSO teleconnection patterns for CCSM3-WRF in the future, with wet anomalies dominating in the PNW and the Southwest U.S. for both warm and cold ENSO, in contrast to the canonical patterns of precipitation anomalies. Interaction of anomalous wind flow with local terrain plays a critical role in the generation of anomalous precipitation over the western U.S. Anomalous dry conditions are always associated with anomalous airflow that runs parallel to local mountains and wet conditions with airflow that runs perpendicular to local mountains. Future changes in temperature and precipitation associated with the ENSO events in the regional simulations indicate varying responses depending on the variables examined as well as depending on the phase of ENSO.

Zhang, Yongxin; Qian, Yun; Duliere, Valerie; Salathe, E.; Leung, Lai-Yung R.

2012-01-03T23:59:59.000Z

300

Seasonal Climatic Anomaly Types for the North Pacific Sector and Western North America  

Science Conference Proceedings (OSTI)

Recurrent patterns of seasonal sea level pressure anomaly over the North Pacific sector and western North America are objectively identified using correlation coefficients between anomaly maps as a pattern recognition device. Five major anomaly ...

T. J. Blasing; G. R. Lofgren

1980-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Solar Eclipse Anomalies and Wave Refraction  

E-Print Network (OSTI)

There is some inconclusive evidence that measurement devices sensitive to local gravitation exhibit anomalous behaviour during solar eclipses. We investigate if these findings can be incorporated into the standard general relativistic model of gravitation. The General Theory of Relativity (GTR) describes gravitation as the response of an object to local spacetime curvature. Gravitational waves travelling at the speed of light are then a necessary mechanism to maintain the required consistency between local curvature and distant gravitating mass. Gravitational waves will certainly be subject to refraction by bodies such as the moon and we explore if such an effect can result in an error in the apparent position of the sources and thereby give rise to the characteristic pattern of response associated with the eclipse anomaly. It is found there are phenomenological similarities, but only if gravitational waves are considered not merely to respond to spacetime curvature but are also significantly affected by the presence of mass, perhaps in a manner analogous to electromagnetic waves propagating through matter.

Alasdair Macleod

2006-10-23T23:59:59.000Z

302

Temporal Changes in the Observed Relationship between Cloud Cover and Surface Air Temperature  

Science Conference Proceedings (OSTI)

The relationship between cloud cover and near-surface air temperature and its decadal changes are examined using the hourly synoptic data for the past four to six decades from five regions of the Northern Hemisphere: Canada, the United States, ...

Bomin Sun; Pavel Ya Groisman; Raymond S. Bradley; Frank T. Keimig

2000-12-01T23:59:59.000Z

303

The Southern Oscillation. Part I: Global Associations with Pressure and Temperature in Northern Winter  

Science Conference Proceedings (OSTI)

We describe the global correlations between a measure of the Southern Oscillation and sea level pressure and surface air temperature in the northern winter. The stability of these correlations were tested on the Northern Hemisphere for an 80-year ...

Harry van Loon; Roland A. Madden

1981-06-01T23:59:59.000Z

304

Climate from borehole data: Energy fluxes and temperatures since Hugo Beltrami  

E-Print Network (OSTI)

anomaly. The vertical profile of the temperature anomaly, depends on the history of energy balance. Wang, and R. L. Bras, Energy balance at the Earth's surface: Heat flux history in eastern CanadaClimate from borehole data: Energy fluxes and temperatures since 1500 Hugo Beltrami Environmental

Beltrami, Hugo

305

Systematic construction of anomaly detection benchmarks from real data  

Science Conference Proceedings (OSTI)

Research in anomaly detection suffers from a lack of realistic and publicly-available problem sets. This paper discusses what properties such problem sets should possess. It then introduces a methodology for transforming existing classification data ...

Andrew F. Emmott, Shubhomoy Das, Thomas Dietterich, Alan Fern, Weng-Keen Wong

2013-08-01T23:59:59.000Z

306

3D Magnetotelluric Characterization Of The Geothermal Anomaly In The  

Open Energy Info (EERE)

Magnetotelluric Characterization Of The Geothermal Anomaly In The Magnetotelluric Characterization Of The Geothermal Anomaly In The Llucmajor Aquifer System (Majorca, Spain) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: 3D Magnetotelluric Characterization Of The Geothermal Anomaly In The Llucmajor Aquifer System (Majorca, Spain) Details Activities (0) Areas (0) Regions (0) Abstract: In the Llucmajor aquifer system (Majorca Island, Spain) some geothermal evidences have appeared. This phenomenon is not isolated to Majorca and it is present in other areas, where it can be associated with structural conditions, especially to the extensional event suffered by the island after the Alpine Orogeny. However, the origin of this anomaly in Llucmajor is not well known, and there is no surface geological evidence of

307

Barotropic Stationary States and Persistent Anomalies in the Atmosphere  

Science Conference Proceedings (OSTI)

A robust algorithm, capable of finding nearly stationary solutions of the unforced barotropic vorticity equation near to observed atmospheric streamfunctions, is presented. When applied to observed persistent anomaly patterns, the nearly ...

Jeffrey L. Anderson

1992-09-01T23:59:59.000Z

308

Spatiotemporal anomaly detection in gas monitoring sensor networks  

Science Conference Proceedings (OSTI)

In this paper, we use Bayesian Networks as a means for unsupervised learning and anomaly (event) detection in gas monitoring sensor networks for underground coal mines. We show that the Bayesian Network model can learn cyclical baselines for gas concentrations, ...

X. Rosalind Wang; Joseph T. Lizier; Oliver Obst; Mikhail Prokopenko; Peter Wang

2008-01-01T23:59:59.000Z

309

Filters and Approximate Confidence Intervals for Interpreting Rainfall Anomaly indices  

Science Conference Proceedings (OSTI)

The rainfall anomaly index (RAI) has been widely used to study variations over time in Sahelian rainfall. Its interpretation is often complicated by excessive missing data and changes in station network, both of which prevent a precise ...

L. Bärring; M. Hulme

1991-08-01T23:59:59.000Z

310

The Relationship of Highly Reflective Clouds to Tropical Climate Anomalies  

Science Conference Proceedings (OSTI)

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

Stefan Hastenrath

1990-03-01T23:59:59.000Z

311

The Opening of the Tasman Sea: A Gravity Anomaly Animation  

Science Conference Proceedings (OSTI)

The first plate tectonic gravity anomaly grid animation using data from the Tasman Sea is presented. In this animation the tectonic elements are represented by their respective gravity fields, based on recent marine-satellite-derived gravity ...

C. Gaina; R. D. Müller; W. R. Roest; P. Symonds

1998-01-01T23:59:59.000Z

312

Resampling approach for anomaly detection in multispectral images  

Science Conference Proceedings (OSTI)

We propose a novel approach for identifying the 'most unusual' samples in a data set, based on a resampling of data attributes. The resampling produces a 'background class' and then binary classification is used to distinguish the original training set from the background. Those in the training set that are most like the background (i e, most unlike the rest of the training set) are considered anomalous. Although by their nature, anomalies do not permit a positive definition (if I knew what they were, I wouldn't call them anomalies), one can make 'negative definitions' (I can say what does not qualify as an interesting anomaly). By choosing different resampling schemes, one can identify different kinds of anomalies. For multispectral images, anomalous pixels correspond to locations on the ground with unusual spectral signatures or, depending on how feature sets are constructed, unusual spatial textures.

Theiler, J. P. (James P.); Cai, D. (David)

2003-01-01T23:59:59.000Z

313

Predictability of Java Monsoon Rainfall Anomalies: A Case Study  

Science Conference Proceedings (OSTI)

A substantial portion of the interannual variability of rainfall at Jakarta, Java, can be predicted from antecedent pressure anomalies at Darwin, northern Australia; the pressure persistence, the concurrent correlation of pressure and rainfall, ...

Stefan Hastenrath

1987-01-01T23:59:59.000Z

314

Simulations of Persistent North Pacific Circulation Anomalies and Interhemispheric Teleconnections  

Science Conference Proceedings (OSTI)

Evidence is presented from a composite analysis of a 14-year general circulation model simulation, that persistent North Pacific (PNP) circulation anomalies during boreal winter are part of a larger-scale meridional development extending into the ...

R. W. Higgins; S. D. Schubert

1996-01-01T23:59:59.000Z

315

Climatology of Tropical Intraseasonal Convective Anomalies: 1979–2002  

Science Conference Proceedings (OSTI)

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

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

2004-02-01T23:59:59.000Z

316

Circulation Anomalies Associated with Tropical Convection during Northern Winter  

Science Conference Proceedings (OSTI)

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

George N. Kiladis; Klaus M. Weickmann

1992-09-01T23:59:59.000Z

317

Isotopic Anomalies in CP Stars: Helium, Mercury, Platinum, and Calcium  

E-Print Network (OSTI)

We review the classical observational results for isotopic abundance variations for several elements in CP stars. We concentrate on the "newest" anomaly, in calcium. The cosmically very rare isotope, Ca-48 can rival and even dominate the more common, alpha nuclide, Ca-40. Relevant examples are found in the hot, non-magnetic HgMn stars, and the field horizontal-branch star, Feige 86. The calcium anomaly is also present in cool, magnetic stars, including the notorious HD 101065, Przybylski's star.

C. R. Cowley; S. Hubrig; F. Castelli

2007-11-15T23:59:59.000Z

318

Fluid/Gravity Correspondence, Second Order Transport and Gravitational Anomaly  

E-Print Network (OSTI)

We study the transport properties of a relativistic fluid affected by chiral and gauge-gravitational anomalies. The computation is performed in the framework of the fluid/gravity correspondence for a 5 dim holographic model with Chern-Simons terms in the action. We find new anomalous and non anomalous transport coefficients, as well as new contributions to the existing ones coming from the mixed gauge-gravitational anomaly. Consequences for the shear waves dispersion relation are analyzed.

Eugenio Megias; Francisco Pena-Benitez

2013-07-29T23:59:59.000Z

319

CARS Control Anomaly Recognition System: System Concept, Requirements, and Specifications  

Science Conference Proceedings (OSTI)

This report presents results of an initial study aimed at defining the system concept, principal requirements, and functional specification for a control anomaly recognition system (CARS) software tool. The purpose of the CARS software system is to assist nuclear power plant operators in the early detection of faults and anomalies in plant control systems before they cause reactor scrams or component damage. The diagnostic capability technology of CARS can support other process industries' applications b...

2002-04-12T23:59:59.000Z

320

The Southern Oscillation and Indonesian Sea Surface Temperature  

Science Conference Proceedings (OSTI)

The relationship of the Southern Oscillation and El Niño phenomena to sea surface temperature anomalies in the Indonesian region is investigated. The three are closely related and the relationship has a strong annual cycle. The Indonesian sea ...

N. Nicholls

1984-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Traveling Waves and Regional Transitions in Blocking Activity in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

In preference to the use of persistent height anomalies for determining the presence of blocking, new criteria were developed which take the observed flow conditions into account. These criteria were applied daily at 500 mb, using filtered ...

Roderick S. Quiroz

1987-05-01T23:59:59.000Z

322

Interannual (ENSO) and Interdecadal (ENSO-like) Variability in the Southern Hemisphere Tropospheric Circulation  

Science Conference Proceedings (OSTI)

Recent work has identified variability in the Pacific Ocean SST with a structure qualitatively similar to ENSO, but at lower frequencies than ENSO. Zhang et al. have documented the atmospheric circulation anomalies in the Tropics and Northern ...

RenéD. Garreaud; David S. Battisti

1999-07-01T23:59:59.000Z

323

The Geographical Distribution and Seasonality of Persistence in Monthly Mean Air Temperatures over the United States  

Science Conference Proceedings (OSTI)

Eighty years of monthly mean station temperatures are used to evaluate the persistence of monthly air temperature anomalies over the United States. The geographical and seasonal dependence of the monthly persistence are described in term of the ...

H. M. van den Dool; W. H. Klein; J. E. Walsh

1986-03-01T23:59:59.000Z

324

The Vertical Structure of Temperature in the Tropics: Different Flavors of El Niño  

Science Conference Proceedings (OSTI)

To explore the vertical coherence of the vertical temperature structure in the atmosphere, an analysis is performed of the full three-dimensional spatial structure of the temperature field monthly mean anomalies from the 40-yr ECMWF Re-Analysis (...

Kevin E. Trenberth; Lesley Smith

2006-10-01T23:59:59.000Z

325

The Signature of ENSO in Global Temperature and Precipitation Fields Derived from the Microwave Sounding Unit  

Science Conference Proceedings (OSTI)

Global temperature anomalies associated with ENSO are investigated, making use of a 13-year record of gridded temperature and precipitation data from the microwave sounding unit (MSU). The warm phase of the ENSO cycle during this period was ...

Elena Yulaeva; John M. Wallace

1994-11-01T23:59:59.000Z

326

Dielectric anomaly in coupled rotor systems  

E-Print Network (OSTI)

The correlated dynamics of coupled quantum rotors carrying electric dipole moment is theoretically investigated. The energy spectra of coupled rotors as a function of dipolar interaction energy is analytically solved. The calculated dielectric susceptibilities of the system show the peculiar temperature dependence different from that of isolated rotors.

Hiroyuki Shima; Tsuneyoshi Nakayama

2004-07-02T23:59:59.000Z

327

US dollar quantification of the Western Hemisphere gasoline market: US dollar value of gasoline consumption, 1994 United States, Canada, Latin America, and total Western Hemisphere ex-tax, tax, and combined dollar value  

Science Conference Proceedings (OSTI)

While each individual nation`s gasoline market -- as to number of gallons, and the market value of those gallons -- is directly significant only to that nation, this report treats the Western Hemisphere gasoline markets in a regional manner. The Western Hemisphere gasoline markets currently amounts to nearly US $206 billion per year.

NONE

1995-11-10T23:59:59.000Z

328

Multivariate forecast of winter monsoon rainfall in India using SST anomaly as a predictor: Neurocomputing and statistical approaches  

E-Print Network (OSTI)

In this paper, the complexities in the relationship between rainfall and sea surface temperature (SST) anomalies during the winter monsoon (November-January) over India were evaluated statistically using scatter plot matrices and autocorrelation functions.Linear as well as polynomial trend equations were obtained and it was observed that the coefficient of determination for the linear trend was very low and it remained low even when polynomial trend of degree six was used. An exponential regression equation and an artificial neural network with extensive variable selection were generated to forecast the average winter monsoon rainfall of a given year using the rainfall amounts and the sea surface temperature anomalies in the winter monsoon months of the previous year as predictors. The regression coefficients for the multiple exponential regression equation were generated using Levenberg-Marquardt algorithm. The artificial neural network was generated in the form of a multiplayer perceptron with sigmoid non-l...

Chattopadhyay, Goutami; Jain, Rajni

2009-01-01T23:59:59.000Z

329

Changing Northern Hemisphere Storm Tracks in an Ensemble of IPCC Climate Change Simulations  

Science Conference Proceedings (OSTI)

Winter storm-track activity over the Northern Hemisphere and its changes in a greenhouse gas scenario (the Special Report on Emission Scenarios A1B forcing) are computed from an ensemble of 23 single runs from 16 coupled global climate models (...

U. Ulbrich; J. G. Pinto; H. Kupfer; G. C. Leckebusch; T. Spangehl; M. Reyers

2008-04-01T23:59:59.000Z

330

Space–Time Spectral Analysis of the Southern Hemisphere Daily 500-hPa Geopotential Height  

Science Conference Proceedings (OSTI)

In this paper the authors use the NCEP–Department of Energy (DOE) Reanalysis 2 (NCEP2) data from 1979 to 2004 to expand the daily 500-hPa geopotential height in the Southern Hemisphere (SH, 90°–20°S) into a double Fourier series, and analyze the ...

Cheng Sun; Jianping Li

2012-12-01T23:59:59.000Z

331

Carbon ion beam focusing using laser irradiated heated diamond hemispherical shells  

DOE Green Energy (OSTI)

Experiments preformed at the Los Alamos National Laboratory's Trident Laser Facility were conducted to observe the acceleration and focusing of carbon ions via the TNSA mechanism using hemispherical diamond targets. Trident is a 200TW class laser system with 80J of 1 {micro}m, short-pulse light delivered in 0.5ps, with a peak intensity of 5 x 10{sup 20} W/cm{sup 2}. Targets where Chemical Vapor Deposition (CVD) diamonds formed into hemispheres with a radius of curvature of 400{micro}m and a thickness of 5{micro}m. The accelerated ions from the hemisphere were diagnosed by imaging the shadow of a witness copper mesh grid located 2mm behind the target onto a film pack located 5cm behind the target. Ray tracing was used to determine the location of the ion focal spot. The TNSA mechanism favorably accelerates hydrogen found in and on the targets. To make the carbon beam detectable, targets were first heated to several hundred degrees Celsius using a CW, 532nm, 8W laser. Imaging of the carbon beam was accomplished via an auto-radiograph of a nuclear activated lithium fluoride window in the first layer of the film pack. The focus of the carbon ion beam was determined to be located 630 {+-} 110 {micro}m from the vertex of the hemisphere.

Offermann, Dustin T [Los Alamos National Laboratory; Flippo, Kirk A [Los Alamos National Laboratory; Gaillard, Sandrine A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

332

Maximum Surface Albedo of Seasonally Snow-Covered Lands in the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Areally weighted clear sky surface albedo of snow-covered land in the middle and high latitudes of the Northern Hemisphere was measured from satellite imagery in A 1×1° latitude-longitude cells. The study area included 87% of the land polewards ...

David A. Robinson; George Kukla

1985-05-01T23:59:59.000Z

333

A 15-Year Climatology of Northern Hemisphere 500 mb Closed Cyclone and Anticyclone Centers  

Science Conference Proceedings (OSTI)

A 15-year (1963–77) Northern Hemisphere 2 × 5 degree latitude-longitude gridded dataset of 500 mb geopotential heights has been used to construct a climatology of 500 mb closed circulation centers. These centers, defined by at least one closed 30 ...

Gerald D. Bell; Lance F. Bosart

1989-10-01T23:59:59.000Z

334

Use of Passive Tracers as a Diagnostic Tool in Coupled Model Simulations—Northern Hemisphere  

Science Conference Proceedings (OSTI)

This study focuses on the uptake of a passive idealized tracer in the Northern Hemisphere oceans from two coupled ocean–atmosphere simulations: a standard horizontal diffusion case and the second case including the Gent and McWilliams (GM) eddy ...

Siobhan P. O'Farrell

2002-03-01T23:59:59.000Z

335

The Wave–Zonal Mean Flow Interaction in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

This study examines the wave–zonal mean flow interaction in the Southern Hemisphere (SH) and in an SH- like model atmosphere. During the SH winter, when there exist both subtropical and polar front jets, growing baroclinic waves are found between ...

Hyun-kyung Kim; Sukyoung Lee

2004-05-01T23:59:59.000Z

336

Quasi-Stationary Waves in the Southern Hemisphere. Part I: Observational Data  

Science Conference Proceedings (OSTI)

This Part I presents selected major features of the quasi-stationary (monthly mean) wave field in the troposphere and stratosphere of the Southern Hemisphere. It is confirmed that the quasi-stationary wave with zonal wavenumber 1 (QS-wave 1) is ...

Arturo I. Quintanar; Carlos R. Mechoso

1995-11-01T23:59:59.000Z

337

The Life Cycle of a Cyclone Wave in the Southern Hemisphere. Part I: Eddy Energy Budget  

Science Conference Proceedings (OSTI)

The energetics of a Southern Hemisphere cyclone wave have been analyzed using ECMWF data and the results of a limited-area model simulation. An analysis of the energy budget for a storm that developed in the eastern Pacific on 4–6 September 1987 ...

I. Orlanski; J. Katzfey

1991-09-01T23:59:59.000Z

338

The relationship of Weddell polynya and open-ocean deep convection to the Southern Hemisphere westerlies  

Science Conference Proceedings (OSTI)

The Weddell polynya of the mid 1970s is simulated in an Energy Balance Model (EBM) sea-ice/ocean coupled General Circulation Model (GCM) with an abrupt 20% increase in intensity of Southern Hemisphere (SH) westerlies. This small up-shift of ...

Woo Geun Cheon; Young-Gyu Park; J. R. Toggweiler; Sang-Ki Lee

339

A Simplified Linear Framework for Interpreting Patterns of Northern Hemisphere Wintertime Climate Variability  

Science Conference Proceedings (OSTI)

The principal patterns of variability of the extratropical Northern Hemisphere (NH) wintertime circulation are examined, based on 42 yr of data from the NCAR–NCEP reanalyses. The two-dimensional phase space defined by the two leading PCs of the ...

Roberta Quadrelli; John M. Wallace

2004-10-01T23:59:59.000Z

340

Automatic Construction of Anomaly Detectors from Graphical Models  

Science Conference Proceedings (OSTI)

Detection of rare or previously unseen attacks in cyber security presents a central challenge: how does one search for a sufficiently wide variety of types of anomalies and yet allow the process to scale to increasingly complex data? In particular, creating each anomaly detector manually and training each one separately presents untenable strains on both human and computer resources. In this paper we propose a systematic method for constructing a potentially very large number of complementary anomaly detectors from a single probabilistic model of the data. Only one model needs to be trained, but numerous detectors can then be implemented. This approach promises to scale better than manual methods to the complex heterogeneity of real-life data. As an example, we develop a Latent Dirichlet Allocation probability model of TCP connections entering Oak Ridge National Laboratory. We show that several detectors can be automatically constructed from the model and will provide anomaly detection at flow, sub-flow, and host (both server and client) levels. This demonstrates how the fundamental connection between anomaly detection and probabilistic modeling can be exploited to develop more robust operational solutions.

Ferragut, Erik M [ORNL; Darmon, David M [ORNL; Shue, Craig A [ORNL; Kelley, Stephen [ORNL

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

The Collapse of the Bering Strait Ice Dam and the Abrupt Temperature Rise in the Beginning of the Holocene  

Science Conference Proceedings (OSTI)

This paper focuses on the abrupt increase in the oceanic and atmospheric temperature in the Northern Hemisphere at the beginning of the Holocene, approximately 11 000 yr before the present. De Boer and Nof hypothesized that, at that time, the ...

Cathrine Sandal; Doron Nof

2008-09-01T23:59:59.000Z

342

Reconstruction of the Extratropical NH Mean Temperature over the Last Millennium with a Method that Preserves Low-Frequency Variability  

Science Conference Proceedings (OSTI)

A new multiproxy reconstruction of the Northern Hemisphere extratropical mean temperature over the last millennium is presented. The reconstruction is performed with a novel method designed to avoid the underestimation of low-frequency variability ...

Bo Christiansen; Fredrik Charpentier Ljungqvist

2011-12-01T23:59:59.000Z

343

Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal  

Open Energy Info (EERE)

Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Hg Anomalies In Soils- A Geochemical Exploration Method For Geothermal Areas Details Activities (5) Areas (5) Regions (0) Abstract: Hg contents of soils in geothermal areas in the western U.S. were measured and a three-fold distribution was observed: peak, aureole and background. Peak values (up to several 100 ppm Hg) occur in fumaroles of vapour-dominated systems, around hot springs, and in zones overlying steeply dipping, hot-water aquifers. Aureoic values (up to several 100 ppb Hg) are found in zones surrounding the peak areas and delineate areas with shallow geothermal convection. Background values vary between 7 and 40 ppb

344

Anomaly-free constraints in neutrino seesaw models  

E-Print Network (OSTI)

The implementation of seesaw mechanisms to give mass to neutrinos in the presence of an anomaly-free U(1)_X gauge symmetry is discussed in the context of minimal extensions of the standard model. It is shown that type-I and type-III seesaw mechanisms cannot be simultaneously implemented with an anomaly-free local U(1)_X, unless the symmetry is a replica of the well-known hypercharge. For combined type-I/II or type-III/II seesaw models it is always possible to find nontrivial anomaly-free charge assignments, which are however tightly constrained, if the new neutral gauge boson is kinematically accessible at LHC. The discovery of the latter and the measurement of its decays into third-generation quarks, as well as its mixing with the standard Z boson, would allow one to discriminate among different seesaw realizations.

D. Emmanuel-Costa; Edison T. Franco; R. Gonzalez Felipe

2009-02-10T23:59:59.000Z

345

Anomaly-free constraints in neutrino seesaw models  

SciTech Connect

The implementation of seesaw mechanisms to give mass to neutrinos in the presence of an anomaly-free U(1){sub X} gauge symmetry is discussed in the context of minimal extensions of the standard model. It is shown that type-I and type-III seesaw mechanisms cannot be simultaneously implemented with an anomaly-free local U(1){sub X}, unless the symmetry is a replica of the well-known hypercharge. For combined type-I/II or type-III/II seesaw models it is always possible to find nontrivial anomaly-free charge assignments, which are however tightly constrained, if the new neutral gauge boson is kinematically accessible at LHC. The discovery of the latter and the measurement of its decays into third-generation quarks, as well as its mixing with the standard Z boson, would allow one to discriminate among different seesaw realizations.

Emmanuel-Costa, D. [Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal); Franco, Edison T. [Instituto de Fisica Teorica, Universidade Estadual Paulista, Rua Doutor Bento Teobaldo Ferraz 271 - Bloco II, 01140-070 - Sao Paulo, SP (Brazil); Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal); Felipe, R. Gonzalez [Area Cientifica de Fisica, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emidio Navarro 1, 1959-007 Lisboa (Portugal); Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Avenida Rovisco Pais, 1049-001 Lisboa (Portugal)

2009-06-01T23:59:59.000Z

346

Mapping the spatial and temporal SST variations in the Red Sea, revealing a probable regional geothermal anomaly using Pathfinder V5 data  

Science Conference Proceedings (OSTI)

The idea is presented that satellite-derived night-time thermal maps can be used for the identification of regional sea surface temperature (SST) anomalies that may be related to geothermal processes. The analysis of night-time monthly Pathfinder V5 ...

George Ch. Miliaresis; Karen St. Seymour

2011-04-01T23:59:59.000Z

347

Phase diagram and water-like anomalies in core-softened shoulder-dumbbells system  

E-Print Network (OSTI)

Using molecular dynamics we studied the role of the anisotropy on the phase boundary and on the anomalous behavior of 250 dimeric particles interacting by a core-softened potential. This study led us to an unexpected result: the introduction of a rather small anisotropy, quantified by the distance between the particles inside each dimer, leads to the increase of the size of the regions in the pressure-temperature phase diagram of anomalies when compared to the isotropic monomeric case. However, as the anisotropy increases beyond a threshold the anomalous regions shrinks. We found that this behavior can be understood by decoupling the translational and non-translational kinetic energy components into different translational and non-translational temperatures.

Cristina Gavazzoni; Guilherme K. Gonzatti; Luiz Felipe Pereira; Luis Henrique Coelho Ramos; Paulo A. Netz; Marcia C. Barbosa

2013-09-03T23:59:59.000Z

348

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

Science Conference Proceedings (OSTI)

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

2000-06-27T23:59:59.000Z

349

A Pattern-Based Framework for Software Anomaly Detection  

Science Conference Proceedings (OSTI)

This paper presents a pattern-based framework for developing tool support to detect software anomalies. The use of a pattern-based approach is important because it provides the flexibility needed to address domain-specific needs, with respect to the ... Keywords: high assurance software, pattern specification language, safety-critical avionics systems, software inspection, software tools framework

S. C. Kothari; Luke Bishop; Jeremias Sauceda; Gary Daugherty

2004-06-01T23:59:59.000Z

350

BGP-lens: patterns and anomalies in internet routing updates  

Science Conference Proceedings (OSTI)

The Border Gateway Protocol (BGP) is one of the fundamental computer communication protocols. Monitoring and mining BGP update messages can directly reveal the health and stability of Internet routing. Here we make two contributions: firstly we ... Keywords: BGP monitoring, anomalies, patterns, self-similarity

B. Aditya Prakash; Nicholas Valler; David Andersen; Michalis Faloutsos; Christos Faloutsos

2009-06-01T23:59:59.000Z

351

Network anomaly detection with the restricted Boltzmann machine  

Science Conference Proceedings (OSTI)

With the rapid growth and the increasing complexity of network infrastructures and the evolution of attacks, identifying and preventing network abuses is getting more and more strategic to ensure an adequate degree of protection from both external and ... Keywords: Anomaly detection, Energy-based models, Intrusion detection, Restricted Boltzmann machine, Semi-supervised learning

Ugo Fiore, Francesco Palmieri, Aniello Castiglione, Alfredo De Santis

2013-12-01T23:59:59.000Z

352

Spatial neighborhood based anomaly detection in sensor datasets  

Science Conference Proceedings (OSTI)

Success of anomaly detection, similar to other spatial data mining techniques, relies on neighborhood definition. In this paper, we argue that the anomalous behavior of spatial objects in a neighborhood can be truly captured when both (a) spatial ... Keywords: Outlier detection, Sensors, Spatial neighborhood

Vandana P. Janeja; Nabil R. Adam; Vijayalakshmi Atluri; Jaideep Vaidya

2010-03-01T23:59:59.000Z

353

Modular Anomaly Detection for Smartphone Ad hoc Communication  

E-Print Network (OSTI)

a mobile ad hoc network (MANET). While intrusion detection in MANETs is typically evaluated with network. The study shows the feasibility of the statistics-based anomaly detection regime, having low CPU usage, among others, has been focused on studies of energy and bandwidth constrained communication using

354

An ERP study of semantic anomalies in second language processing  

Science Conference Proceedings (OSTI)

This study conducts an event-related potential (ERP) study to investigate the temporal neural dynamics of semantic processing in bilinguals. The experiment was done with Korean speakers of English as an L2, divided into two groups depending on their ... Keywords: N400, second language, semantic anomaly, semantic congruency, sentence processing

Jia Miao

2013-06-01T23:59:59.000Z

355

Residual bouguer gravity anomaly map of northern New Mexico  

DOE Green Energy (OSTI)

The map is computer contoured from equidistant grid and bicubic spline interpolated surface. Bouguer gravity anomaly correction applied is g/sub BC/ = (0.034) x (elevation - regional elevation), with density 2.67 g/cc. Overall dimensions are 41/sup 1///sub 2/'' x 43''; scale is 1 : 500,000. (JGB)

Aiken, C.L.V.; Laughlin, A.W.; West, F.G.

1977-03-01T23:59:59.000Z

356

Reducing false positives in anomaly detectors through fuzzy alert aggregation  

Science Conference Proceedings (OSTI)

In this paper we focus on the aggregation of IDS alerts, an important component of the alert fusion process. We exploit fuzzy measures and fuzzy sets to design simple and robust alert aggregation algorithms. Exploiting fuzzy sets, we are able to robustly ... Keywords: Aggregation, Anomaly detection, Fuzzy measures, Fuzzy sets, Intrusion detection, Multisensor fusion

Federico Maggi; Matteo Matteucci; Stefano Zanero

2009-10-01T23:59:59.000Z

357

Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies  

E-Print Network (OSTI)

We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, and for the reactor anomaly. The first scenario is the mini-seesaw mechanism with two eV-scale sterile neutrinos. We present both analytic formulas and numerical results showing that this scenario could account for the short baseline and reactor anomalies and is consistent with the observed masses and mixings of the three active neutrinos. We also show that this scenario could arise naturally from an effective theory containing a TeV-scale VEV, which could be related to other TeV-scale physics. The minimal version of the mini-seesaw relates the active-sterile mixings to five real parameters and favors an inverted hierarchy. It has the interesting property that the effective Majorana mass for neutrinoless double beta decay vanishes, while the effective masses relevant to tritium beta decay and to cosmology are respectively around 0.2 and 2.4 eV. The second scenario contains only one eV-scale sterile neutrino but with an effective non-unitary mixing matrix between the light sterile and active neutrinos. We find that though this may explain the anomalies, if the non-unitarity originates from a heavy sterile neutrino with a large (fine-tuned) mixing angle, this scenario is highly constrained by cosmological and laboratory observations.

JiJi Fan; Paul Langacker

2012-01-31T23:59:59.000Z

358

Ensemble based sensing anomaly detection in wireless sensor networks  

Science Conference Proceedings (OSTI)

Wireless sensor networks are often used to monitor and measure physical characteristics from remote and sometimes hostile environments. In these circumstances the sensing data accuracy is a crucial attribute for the way these applications complete their ... Keywords: Binary classifier, Data accuracy, Ensemble based systems, Sensors anomalies, Wireless sensor networks

Daniel-Ioan Curiac; Constantin Volosencu

2012-08-01T23:59:59.000Z

359

Embedded Cyber-Physical Anomaly Detection in Smart Meters  

E-Print Network (OSTI)

Embedded Cyber-Physical Anomaly Detection in Smart Meters Massimiliano Raciti, Simin Nadjm vulnerabilities that arise from deployment of local cyber-physical attacks at a smart metering location at destabilisation. In this paper we study a smart metering device that uses a trusted platform for storage

360

Proceedings of the Axial Offset Anomaly (AOA) Science Workshop  

SciTech Connect

This report presents proceedings of the Axial Offset Anomaly (AOA) Science Workshop, held February 10-11 in Palo Alto, California. Twenty-two papers were presented on various aspects of AOA by utilities, EPRI Robust Fuel Program contractors, staff from EPRI and universities, international researchers, and equipment vendors.

None

2003-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Combining filtering and statistical methods for anomaly detection  

Science Conference Proceedings (OSTI)

In this work we develop an approach for anomaly detection for large scale networks such as that of an enterprize or an ISP. The traffic patterns we focus on for analysis are that of a network-wide view of the traffic state, called the traffic matrix. ...

Augustin Soule; Kavé Salamatian; Nina Taft

2005-10-01T23:59:59.000Z

362

A RE-INTRODUCTION TO ANOMALIES OF CRITICALITY  

SciTech Connect

In 1974, a small innocuous document was submitted to the American Nuclear Society's Criticality Safety Division for publication that would have lasting impacts on this nuclear field The author was Duane Clayton, manager of the Battelle Pacific Northwest National Laboratory's Critical Mass Lab, the world's preeminent reactor critical experimenter with plutonium solutions. The document was entitled, 'Anomalies of Criticality'. 'Anomalies...' was a compilation of more than thirty separate and distinct examples of departures from what might be commonly expected in the field of nuclear criticality. Mr. Clayton's publication was the derivative of more than ten thousand experiments and countless analytical studies conducted world-wide on every conceivable reactor system imaginable: from fissile bearing solutions to solids, blocks to arrays of fuel rods, low-enriched uranium oxide systems to pure plutonium and highly enriched uranium systems. After publication, the document was commonly used within the nuclear fuel cycle and reactor community to train potential criticality/reactor analysts, experimenters and fuel handlers on important things for consideration when designing systems with critically 'safe' parameters in mind The purpose of this paper is to re-introduce 'Anomalies of Criticality' to the current Criticality Safety community and to add new 'anomalies' to the existing compendium. By so doing, it is the authors' hope that a new generation of nuclear workers and criticality engineers will benefit from its content and might continue to build upon this work in support of the nuclear renaissance that is about to occur.

PUIGH RJ

2009-09-09T23:59:59.000Z

363

The Response Time of the Temperature of the Equatorial Troposphere to ENSO Heating  

Science Conference Proceedings (OSTI)

Air temperature anomalies, averaged over the troposphere to 200 mb and around the earth from 10°S to 10°N, lag the similarly averaged El Niño–Southern Oscillation (ENSO) atmospheric latent heating anomalies by about one month. Most of the latent ...

Allan J. Clarke; Kwang-Y. Kim

2005-12-01T23:59:59.000Z

364

Large Scale Soft X-ray Loops And Their Magnetic Chirality In Both Hemispheres  

E-Print Network (OSTI)

The magnetic chirality in solar atmosphere has been studied based on the soft X-ray and magnetic field observations. It is found that some of large-scale twisted soft X-ray loop systems occur for several months in the solar atmosphere, before the disappearance of the corresponding background large-scale magnetic field. It provides the observational evidence of the helicity of the large-scale magnetic field in the solar atmosphere and the reverse one relative to the helicity rule in both hemispheres with solar cycles. The transfer of the magnetic helicity from the subatmosphere is consistent with the formation of large-scale twisted soft X-ray loops in the both solar hemispheres.

Zhang, Hongqi; Gao, Yu; Su, Jiangtao; Sokoloff, D D; Kuzanyan, K

2010-01-01T23:59:59.000Z

365

Northern Hemisphere Biome-and Process-Specific Changes in Forest Area and  

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

Northern Hemisphere Biome-and Process-Specific Changes in Forest Area and Northern Hemisphere Biome-and Process-Specific Changes in Forest Area and Gross Merchantable Volume: 1890-1990 (DB1017) data Data DOI: 10.3334/CDIAC/lue.db1017 Contributors A. N. D. Auclair, J. A. Bedford, and C. Revenga Description This database lists annual changes in areal extent (Ha) and gross merchantable wood volume (m3) produced by depletion and accrual processes in boreal and temperate forests in Alaska, Canada, Europe, Former Soviet Union, Non-Soviet temperate Asia, and the contiguous United States for the years 1890 through 1990. Forest depletions (source terms for atmospheric CO2) are identified as forest pests, forest dieback, forest fires, forest harvest, and land-use changes (predominantly the conversion of forest, temperate woodland, and shrubland to cropland). Forest accruals (sink terms

366

A Comparison Of Pointwise Screening and Empirical Orthogonal Functions in Specifying Monthly Surface Temperature from 700 mb Data  

Science Conference Proceedings (OSTI)

A comparison is made between two types of specification of monthly wintertime surface temperatures over the United States. The specifications are obtained by multiple regression of station temperature anomaly at each of 37 stations onto 700 mb ...

William H. Klein; John E. Walsh

1983-04-01T23:59:59.000Z

367

West African Monsoon Dynamics and Eastern Equatorial Atlantic and Pacific SST Anomalies (1970–88)  

Science Conference Proceedings (OSTI)

The Laboratoire de Météorologie Dynamique atmospheric GCM is used to investigate relationships between West African monsoon dynamics and SST anomalies in the eastern equatorial Atlantic and Pacific for the period 1970–88. Positive SST anomalies ...

Serge Janicot; Ali Harzallah; Bernard Fontaine; Vincent Moron

1998-08-01T23:59:59.000Z

368

The Winter Atmospheric Response to Sea Ice Anomalies in the Barents Sea  

Science Conference Proceedings (OSTI)

The atmospheric response to sea ice anomalies over the Barents Sea during winter was determined by boundary forcing the Community Atmosphere Model (CAM) with daily varying high and low sea ice concentration (SIC) anomalies that decreased ...

Jessica Liptak; Courtenay Strong

2014-01-01T23:59:59.000Z

369

Diagenetic and Detrial Origin of Moretane Anomalies through the Permian-Triassic Boundary  

E-Print Network (OSTI)

Many biogeochemical anomalies coincide with the Late Permian Extinction (LPE; 252.28 Ma). Several mechanisms have been proposed to explain the moretane/hopane anomaly that has been identified in samples from Meishan GSSP ...

French, Katherine L.

370

Potential Vorticity Diagnosis of the Severe Convective Regime. Part II: The Impact of Idealized PV Anomalies  

Science Conference Proceedings (OSTI)

Idealized numerical experiments are conducted to understand the effect of upper-tropospheric potential vorticity (PV) anomalies on an environment conducive to severe weather. Anomalies are specified as a single isolated vortex, a string of ...

John W. Nielsen-Gammon; David A. Gold

2008-05-01T23:59:59.000Z

371

How Total Precipitable Water Vapor Anomalies Relate to Cloud Vertical Structure  

Science Conference Proceedings (OSTI)

The NOAA operational total precipitable water (TPW) anomaly product is available to forecasters to display percentage of normal TPW in real time for applications like heavy precipitation forecasts. In this work, the TPW anomaly is compared to ...

John M. Forsythe; Jason B. Dodson; Philip T. Partain; Stanley Q. Kidder; Thomas H. Vonder Haar

2012-04-01T23:59:59.000Z

372

Estimating Sampling Errors in Large-Scale Temperature Averages  

Science Conference Proceedings (OSTI)

A method is developed for estimating the uncertainty (standard error) of observed regional, hemispheric, and global-mean surface temperature series due to incomplete spatial sampling. Standard errors estimated at the grid-box level [SE2 = S2(1 ? ...

P. D. Jones; T. J. Osborn; K. R. Briffa

1997-10-01T23:59:59.000Z

373

Interpretation of Self-Potential Anomalies Using Constitutive Relationships for Electrochemical and Thermoelectric Coupling Coefficients  

DOE Green Energy (OSTI)

Constitutive relationships for electrochemical and thermoelectric cross-coupling coefficients are derived using ionic mobilities, applying a general derivative of chemical potential and employing the zero net current condition. The general derivative of chemical potential permits thermal variations which give rise to the thermoelectric effect. It also accounts for nonideal solution behavior. An equation describing electric field strength is similarly derived with the additional assumption of electrical neutrality in the fluid Planck approximation. The Planck approximation implies that self-potential (SP) is caused only by local sources and also that the electric field strength has only first order spatial variations. The derived relationships are applied to the NaCl-KCl concentration cell with predicted and measured voltages agreeing within 0.4 mV. The relationships are also applied to the Long Valley and Yellowstone geothermal systems. There is a high degree of correlation between predicted and measured SP response for both systems, giving supporting evidence for the validity of the approach. Predicted SP amplitude exceeds measured in both cases; this is a possible consequence of the Planck approximation. Electrochemical sources account for more than 90% of the predicted response in both cases while thermoelectric mechanisms account for the remaining 10%; electrokinetic effects are not considered. Predicted electrochemical and thermoelectric voltage coupling coefficients are comparable to values measured in the laboratory. The derived relationships are also applied to arbitrary distributions of temperature and fluid composition to investigate the geometric diversity of observed SP anomalies. Amplitudes predicted for hypothetical saline spring and hot spring environments are less than 40 mV. In contrast, hypothetical near surface steam zones generate very large amplitudes, over 2 V in one case. These results should be viewed with some caution due to the uncertain validity of the Planck approximation for these conditions. All amplitudes are controlled by electrochemical mechanisms. Polarities are controlled by the curvature of the concentration or thermal profile. Concave upward thermal profiles produce positive anomalies, for constant fluid concentrations, whereas concave upward concentration profiles produce negative anomalies. Concave downward concentration profiles are characterized by small negative closures bounding a larger, positive SP anomaly.

Knapp, R. B.; Kasameyer, P. W.

1988-01-01T23:59:59.000Z

374

Correlation between thermodynamic anomalies and pathways of ice nucleation in supercooled water  

E-Print Network (OSTI)

The well-known classical nucleation theory (CNT) for the free energy barrier towards formation of a nucleus of critical size of the new stable phase within the parent metastable phase fails to take into account the influence of other metastable phases having density/order intermediate between the parent metastable phase and the final stable phase. This lacuna can be more serious than capillary approximation or spherical shape assumption made in CNT. This issue is particularly significant in ice nucleation because liquid water shows rich phase diagram consisting of two (high and low density) liquid phases in supercooled state. The explanations of thermodynamic and dynamic anomalies of supercooled water often invoke the possible influence of a liquid-liquid transition between two metastable liquid phases. To investigate both the role of thermodynamic anomalies and presence of distinct metastable liquid phases in supercooled water on ice nucleation, we employ density functional theoretical approach to find nucleation free energy barrier in different regions of phase diagram. The theory makes a number of striking predictions, such as a dramatic lowering of nucleation barrier due to presence of a metastable intermediate phase and crossover in the dependence of free energy barrier on temperature near liquid-liquid critical point. These predictions can be tested by computer simulations as well as by controlled experiments.

Rakesh S. Singh; Biman Bagchi

2013-12-07T23:59:59.000Z

375

Phonon anomalies induced by polar nano-regions in a relaxor ...  

Science Conference Proceedings (OSTI)

... Phonon anomalies induced by polar nano-regions in a relaxor Ferroelectric. Guangyong Xu (BNL, New York). Inelastic neutron ...

376

The Leading Modes of 10–30 Day Variability in the Extratropics of the Northern Hemisphere during the Cold Season  

Science Conference Proceedings (OSTI)

The 10–30 day variability of extratropical, cold season (November–March) 700 mb geopotential height data of the Northern Hemisphere was studied through the use of rotated complex principal component (RCPC) analysis. The intramonthly modes (IMMs), ...

John R. Lanzante

1990-09-01T23:59:59.000Z

377

Volcanic Eruptions, Large-Scale Modes in the Northern Hemisphere, and the El Niño–Southern Oscillation  

Science Conference Proceedings (OSTI)

The author analyzes the impact of 13 major stratospheric aerosol producing volcanic eruptions since 1870 on the large-scale variability modes of sea level pressure in the Northern Hemisphere winter. The paper focuses on the Arctic Oscillation (AO)...

Bo Christiansen

2008-03-01T23:59:59.000Z

378

Northern Hemispheric Trends of Pressure Indices and Atmospheric Circulation Patterns in Observations, Reconstructions, and Coupled GCM Simulations  

Science Conference Proceedings (OSTI)

The decadal trend behavior of the Northern Hemisphere atmospheric circulation is investigated utilizing long-term simulations with different state-of-the-art coupled general circulation models (GCMs) for present-day climate conditions (1990), ...

C. C. Raible; T. F. Stocker; M. Yoshimori; M. Renold; U. Beyerle; C. Casty; J. Luterbacher

2005-10-01T23:59:59.000Z

379

Trends in Southern Hemisphere Circulation in IPCC AR4 Models over 1950–99: Ozone Depletion versus Greenhouse Forcing  

Science Conference Proceedings (OSTI)

Simulations by the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) models on the Southern Hemisphere (SH) circulation are assessed over the period 1950–99, focusing on the seasonality of the trend and the level of ...

Wenju Cai; Tim Cowan

2007-02-01T23:59:59.000Z

380

Impact of Land Surface Initialisation Approach on Sub–seasonal Forecast Skill: A Regional Analysis in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

We use a sophisticated coupled land–atmosphere modelling system for a Southern Hemisphere sub–domain centred over South East Australia to evaluate differences in simulation skill from two different land surface initialisation approaches. The first ...

Annette L. Hirsch; Jatin Kala; Andy J. Pitman; Claire Carouge; Jason P. Evans; Vanessa Haverd; David Mocko

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Shortwave Radiation Budget of the Southern Hemisphere Using ISCCP C2 and NCEP–NCAR Climatological Data  

Science Conference Proceedings (OSTI)

The seasonal shortwave radiation budget at the surface of the Southern Hemisphere was estimated, for 10° latitudinal zones, using a radiative transfer model with long-term mean monthly climatological data from the International Satellite Cloud ...

N. Hatzianastassiou; I. Vardavas

2001-11-01T23:59:59.000Z

382

Troposphere-Stratosphere (Surface-55 km) Monthly Winter General Circulation Statistics for the Northern Hemisphere-Four Year Averages  

Science Conference Proceedings (OSTI)

Monthly mean Northern Hemisphere general circulation statistics are presented for the four-year average December, January and February months of the winters 1978–79 through 1981–82. These calculations start with daily maps for eighteen pressure ...

Marvin A. Geller; Mao-Fou Wu; Melvyn E. Gelman

1983-05-01T23:59:59.000Z

383

Gravity Wave Characteristics in the Southern Hemisphere Revealed by a High-Resolution Middle-Atmosphere General Circulation Model  

Science Conference Proceedings (OSTI)

Gravity wave characteristics in the middle- to high-latitude Southern Hemisphere are analyzed using simulation data over 3 yr from a high-resolution middle-atmosphere general circulation model without using any gravity wave parameterizations. ...

Kaoru Sato; Satoshi Tateno; Shingo Watanabe; Yoshio Kawatani

2012-04-01T23:59:59.000Z

384

Projected Changes to the Southern Hemisphere Ocean and Sea Ice in the IPCC AR4 Climate Models  

Science Conference Proceedings (OSTI)

Fidelity and projected changes in the climate models, used for the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4), are assessed with regard to the Southern Hemisphere extratropical ocean and sea ice systems. While ...

Alexander Sen Gupta; Agus Santoso; Andréa S. Taschetto; Caroline C. Ummenhofer; Jessica Trevena; Matthew H. England

2009-06-01T23:59:59.000Z

385

Trends in Cyclone and Anticyclone Frequency and Comparison with Periods of Warming and Cooling over the Northern Hemisphere  

Science Conference Proceedings (OSTI)

Available datasets and pertinent climatological studies have been examined to show the statistical trends in frequency of cyclone and anticyclone events for the Northern Hemisphere during periods of warming and cooling this century (as determined ...

Ernest M. Agee

1991-02-01T23:59:59.000Z

386

Northern Hemisphere Winter Atmospheric Transient Eddy Heat Fluxes and the Gulf Stream and Kuroshio-Oyashio Extension Variability  

Science Conference Proceedings (OSTI)

Spatial and temporal co-variability between the atmospheric transient eddy heat fluxes (i.e. and ) in the Northern Hemisphere winter (January-March) and the paths of the Gulf Stream (GS), Kuroshio Extension (KE), and Oyashio Extension ...

Young-Oh Kwon; Terrence M. Joyce

387

The role of the right cerebral hemisphere in processing novel metaphoric expressions: A transcranial magnetic stimulation study  

Science Conference Proceedings (OSTI)

Previous research suggests that the right hemisphere (RH) may contribute uniquely to the processing of metaphoric language. However, causal relationships between local brain activity in the RH and metaphors comprehension were never established. In addition, ...

Gorana Pobric; Nira Mashal; Miriam Faust; Michal Lavidor

2008-01-01T23:59:59.000Z

388

On the Maintenance of Short-Term Subtropical Wind Maxima in the Southern Hemisphere during SOP-1, FGGF  

Science Conference Proceedings (OSTI)

The extent to which divergent circulations, induced by tropical heating, help to maintain westerly maxima in the Southern Hemisphere subtropics during the SOP-1 of FGGE is explored using Level Bib analyses from the Goddard Laboratory for ...

James W. Hurrell; Dayton G. Vincent

1991-10-01T23:59:59.000Z

389

Seasonal Variations in the Southern Hemisphere Storm Tracks and Jet Streams as Revealed in a Reanalysis Dataset  

Science Conference Proceedings (OSTI)

Regional characteristics of the climatological seasonal variations in Southern Hemisphere (SH) storm tracks are examined based on a reanalysis dataset. When differences in vertical structure between the subpolar and subtropical jet streams (SPJ ...

Hisashi Nakamura; Akihiko Shimpo

2004-05-01T23:59:59.000Z

390

Dynamical Processes Related to the Appearance of Quasi-Stationary Waves on the Subtropical Jet in the Midsummer Northern Hemisphere  

Science Conference Proceedings (OSTI)

Statistical features of quasi-stationary planetary waves were examined on the subtropical jet in the midsummer Northern Hemisphere by using objectively analyzed data and satellite data. As a result, a quasi-stationary wave train that is highly ...

Naoki Sato; Masaaki Takahashi

2006-04-01T23:59:59.000Z

391

Southern Hemisphere Synoptic Behavior in Extreme Phases of SAM, ENSO, Sea Ice Extent, and Southern Australia Rainfall  

Science Conference Proceedings (OSTI)

The association between Southern Hemisphere cyclones and anticyclones and the El Niño–Southern Oscillation (ENSO), southern annular mode (SAM), Antarctic sea ice extent (SIE), and rainfall in Perth and Melbourne is explored. Those cities are, ...

Alexandre Bernardes Pezza; Tom Durrant; Ian Simmonds; Ian Smith

2008-11-01T23:59:59.000Z

392

Northern Hemisphere Winter Atmospheric Transient Eddy Heat Fluxes and the Gulf Stream and Kuroshio–Oyashio Extension Variability  

Science Conference Proceedings (OSTI)

Spatial and temporal covariability between the atmospheric transient eddy heat fluxes (i.e., ??T? and ??q?) in the Northern Hemisphere winter (January–March) and the paths of the Gulf Stream (GS), Kuroshio Extension (KE), and Oyashio Extension ...

Young-Oh Kwon; Terrence M. Joyce

2013-12-01T23:59:59.000Z

393

Large Scale, Low Frequency Variability of the 1979 FGGE Surface Buoy Drifts and Winds over the Southern Hemisphere  

Science Conference Proceedings (OSTI)

The surface response of the Southern Hemisphere's oceans to the large spatial scale, interseasonal changes in wind forcing during the FGGE year of 1979 is investigated. The primary data are the analyzed daily wind fields, and the trajectories of ...

W. G. Large; H. Van Loon

1989-02-01T23:59:59.000Z

394

The Impact of Manually Derived Southern Hemisphere Sea Level Pressure Data upon Forecasts from a Global Model  

Science Conference Proceedings (OSTI)

Experiments have been conducted within the framework of the Australian Bureau of Meteorology's global data assimilation and prediction system to assess the forecast impact of Southern Hemisphere sea level pressure estimates [paid observations (...

R. Seaman; P. Steinle; W. Bourke; T. Hart

1993-09-01T23:59:59.000Z

395

Southern Hemisphere Winter Extratropical Cyclone Characteristics and Vertical Organization Observed with the ERA-40 Data in 1979–2001  

Science Conference Proceedings (OSTI)

The mean characteristics and trends of Southern Hemisphere (SH) winter extratropical cyclones occurring at six levels of the troposphere over the period 1979–2001 have been investigated using the 40-yr ECMWF Re-Analysis (ERA-40) data. Cyclonic ...

Eun-Pa Lim; Ian Simmonds

2007-06-01T23:59:59.000Z

396

Geomagnetic Precursor Z Component Diurnal Variation Phase Anomaly Recognition based on the Pattern Distance  

Science Conference Proceedings (OSTI)

Geomagnetic precursor is one of many earthquake precursors, which have better effects on earthquake prediction, while the diurnal variation anomaly of geomagnetic precursor Z component is an important one in short-impending anomalies. Basing on the pattern ... Keywords: Geomagnetic Precursor, Diurnal Variation, Pattern Distance, Anomaly Recognition

Shaochun Wu; Tongyu Yuan; Yan Tang; Bofeng Zhang; Daming Wei

2010-06-01T23:59:59.000Z

397

Using Echo State Networks for Anomaly Detection in Underground Coal Mines  

Science Conference Proceedings (OSTI)

We investigate the problem of identifying anomalies in monitoring critical gas concentrations using a sensor network in an underground coal mine. In this domain, one of the main problems is a provision of mine specific anomaly detection, with cyclical ... Keywords: sensor networks, anomaly detection, recurrent neural networks, echo state networks, bayesian networks, coal mines

Oliver Obst; X. Rosalind Wang; Mikhail Prokopenko

2008-04-01T23:59:59.000Z

398

Rapid reconnaissance of geothermal prospects using shallow temperature  

Open Energy Info (EERE)

Second technical report Second technical report Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Rapid reconnaissance of geothermal prospects using shallow temperature surveys. Second technical report Details Activities (1) Areas (1) Regions (0) Abstract: The previously examined geothermal sites at Long Valley and Coso were studied in much greater detail. Techniques for correcting the 2-m temperature data were evaluated. Using a preliminary model and analysis of the Coso data, the importance of measuring soil thermal diffusivity data at each temperature probe site was shown. Corrected 2-m temperature anomaly at Coso was compared with a low altitude aeromagnetic anomaly and an anomaly outlined by electrical resistivity methods obtained independently. Preliminary tests were made with a simple thermal conductivity probe

399

Consistent description of kinetic equation with triangle anomaly  

SciTech Connect

We provide a consistent description of the kinetic equation with a triangle anomaly which is compatible with the entropy principle of the second law of thermodynamics and the charge/energy-momentum conservation equations. In general an anomalous source term is necessary to ensure that the equations for the charge and energy-momentum conservation are satisfied and that the correction terms of distribution functions are compatible to these equations. The constraining equations from the entropy principle are derived for the anomaly-induced leading order corrections to the particle distribution functions. The correction terms can be determined for the minimum number of unknown coefficients in one charge and two charge cases by solving the constraining equations.

Pu Shi; Gao Jianhua; Wang Qun [Interdisciplinary Center for Theoretical Study and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 (China)

2011-05-01T23:59:59.000Z

400

Anomaly induced transport coefficients, from weak to strong coupling  

E-Print Network (OSTI)

The existence of new transport phenomena associated to the presence of quantum anomalies has atracted very recently the attention of theorist. These transport coefficient have very interesting properties, for example, they do not renormalize. The most famous case of anomaly induced transport phenomena is the Chiral Magnetic Effect, in which an electric current is produced by a magnetic field if the system has a different number of right handed fermions respect the left handed one. In this thesis we have studied those transport coefficients from Kubo formulas at weak and strong coupling. To finish a fluid/gravity approach is used to compute all the second order anomalous coefficients in an anomalous conformal fluid.

Francisco Pena-Benitez

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Anomalies and asymmetries in quark-gluon matter  

SciTech Connect

The manifestations of axial anomaly and related effects in heavy-ion collisions are considered. Special role is played by various asymmetries. The azimuthal correlational asymmetries of neutron pairs at NICA/FAIR energy range may probe the global rotation of strongly interacting matter. The conductivity is related to the angular asymmetries of dilepton pairs. The strong magnetic field generated in heavy-ion collisions leads to the excess of soft dileptons flying predominantly in the scattering plane.

Teryaev, O. V., E-mail: teryaev@theor.jinr.ru [Joint Institute for Nuclear Research (Russian Federation)

2012-06-15T23:59:59.000Z

402

A RE-INTRODUCTION TO ANOMALIES OF CRITICALITY  

SciTech Connect

In 1974, a small innocuous document was submitted to the American Nuclear Society's Criticality Safety Division for publication that would have lasting impacts on this nuclear field The author was Duane Clayton, manager of the Battelle Pacific Northwest National Laboratory's Critical Mass Lab, the world's preeminent reactor critical experimenter with plutonium solutions. The document was entitled, 'Anomalies of Criticality'. 'Anomalies...' was a compilation of more than thirty separate and distinct examples of departures from what might be commonly expected in the field of nuclear criticality. Mr. Clayton's publication was the derivative of more than ten thousand experiments and countless analytical studies conducted world-wide on every conceivable reactor system imaginable: from fissile bearing solutions to solids, blocks to arrays of fuel rods, low-enriched uranium oxide systems to pure plutonium and highly enriched uranium systems. After publication, the document was commonly used within the nuclear fuel cycle and reactor community to train potential criticality/reactor analysts, experimenters and fuel handlers on important things for consideration when designing systems with critically 'safe' parameters in mind The purpose of this paper is to re-introduce 'Anomalies of Criticality' to the current Criticality Safety community and to add new 'anomalies' to the existing compendium. By so doing, it is the authors' hope that a new generation of nuclear workers and criticality engineers will benefit from its content and might continue to build upon this work in support of the nuclear renaissance that is about to occur.

PUIGH RJ

2009-09-09T23:59:59.000Z

403

The Pioneer Anomaly: Seeking an explanation in newly recovered data  

E-Print Network (OSTI)

The Pioneer 10 and 11 spacecraft yielded very accurate navigation that was limited only by a small, anomalous frequency drift of their carrier signals received by the NASA Deep Space Network (DSN). This discrepancy, evident in the data for both spacecraft, was interpreted as an approximately constant acceleration and has become known as the Pioneer anomaly. The origin of this anomaly is yet unknown. Recent efforts to explain the effect included a search for independent confirmation, analyses of conventional mechanisms, even ideas rooted in new physics, and proposals for a dedicated mission. We assert that before any discussion of new physics and (or) a dedicated mission can take place, one must analyze the entire set of radiometric Doppler data received from Pioneer 10 and 11. We report on our efforts to recover and utilize the complete set of radio Doppler and telemetry records of both spacecraft. The collection of radio Doppler data for both missions is now complete; we are ready to begin its evaluation. We also made progress utilizing the recently recovered Pioneer telemetry data. We present a strategy for studying the effect of on-board generated small forces with this telemetry data, in conjunction with the analysis of the entire set of the Pioneer Doppler data. We report on the preparations for the upcoming analysis of the newly recovered data with the ultimate goal of determining the origin of the Pioneer anomaly. Finally, we discuss implications of our on-going research of the Pioneer anomaly for other missions, most notably for New Horizons, NASA's recently launched mission to Pluto.

Viktor T Toth; Slava G Turyshev

2006-03-07T23:59:59.000Z

404

PWR Axial Offset Anomaly (AOA) Guidelines, Revision 1  

Science Conference Proceedings (OSTI)

Axial offset anomaly (AOA) is defined as a significant negative axial offset deviation from the predicted nuclear design value. AOA results from the incorporation of boron within corrosion product deposits on the upper spans of high-duty pressurized water reactor (PWR) fuel assemblies. The consequences of this process are an erosion of shutdown margin and loss of operational flexibility by control room operators, particularly during power transients.

2004-06-28T23:59:59.000Z

405

Light Sterile Neutrinos and Short Baseline Neutrino Oscillation Anomalies  

E-Print Network (OSTI)

We study two possible explanations for short baseline neutrino oscillation anomalies, such as the LSND and MiniBooNE anti-neutrino data, and for the reactor anomaly. The first scenario is the mini-seesaw mechanism with two eV-scale sterile neutrinos. We present both analytic formulas and numerical results showing that this scenario could account for the short baseline and reactor anomalies and is consistent with the observed masses and mixings of the three active neutrinos. We also show that this scenario could arise naturally from an effective theory containing a TeV-scale VEV, which could be related to other TeV-scale physics. The minimal version of the mini-seesaw relates the active-sterile mixings to five real parameters and favors an inverted hierarchy. It has the interesting property that the effective Majorana mass for neutrinoless double beta decay vanishes, while the effective masses relevant to tritium beta decay and to cosmology are respectively around 0.2 and 2.4 eV. The second scenario contains o...

Fan, JiJi

2012-01-01T23:59:59.000Z

406

Geological isotope anomalies as signatures of nearby supernovae  

E-Print Network (OSTI)

Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to \\sim 300 kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope anomalies due to the Geminga supernova explosion, and signatures of the possibility...

Ellis, Jonathan Richard; Schramm, David N; Ellis, John; Fields, Brian D; Schramm, David N

1996-01-01T23:59:59.000Z

407

The trace anomaly and dynamical vacuum energy in cosmology  

Science Conference Proceedings (OSTI)

The trace anomaly of conformal matter implies the existence of massless scalar poles in physical amplitudes involving the stress-energy tensor. These poles may be described by a local effective action with massless scalar fields, which couple to classical sources, contribute to gravitational scattering processes, and can have long range gravitational effects at macroscopic scales. In an effective field theory approach, the effective action of the anomaly is an infrared relevant term that should be added to the Einstein-Hilbert action of classical General Relativity to take account of macroscopic quantum effects. The additional scalar degrees of freedom contained in this effective action may be understood as responsible for both the Casimir effect in flat spacetime and large quantum backreaction effects at the horizon scale of cosmological spacetimes. These effects of the trace anomaly imply that the cosmological vacuum energy is dynamical, and its value depends on macroscopic boundary conditions at the cosmological horizon scale, rather than sensitivity to the extreme ultraviolet Planck scale.

Mottola, Emil [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

408

Anomaly Detection in Multiple Scale for Insider Threat Analysis  

Science Conference Proceedings (OSTI)

We propose a method to quantify malicious insider activity with statistical and graph-based analysis aided with semantic scoring rules. Different types of personal activities or interactions are monitored to form a set of directed weighted graphs. The semantic scoring rules assign higher scores for the events more significant and suspicious. Then we build personal activity profiles in the form of score tables. Profiles are created in multiple scales where the low level profiles are aggregated toward more stable higherlevel profiles within the subject or object hierarchy. Further, the profiles are created in different time scales such as day, week, or month. During operation, the insider s current activity profile is compared to the historical profiles to produce an anomaly score. For each subject with a high anomaly score, a subgraph of connected subjects is extracted to look for any related score movement. Finally the subjects are ranked by their anomaly scores to help the analysts focus on high-scored subjects. The threat-ranking component supports the interaction between the User Dashboard and the Insider Threat Knowledge Base portal. The portal includes a repository for historical results, i.e., adjudicated cases containing all of the information first presented to the user and including any additional insights to help the analysts. In this paper we show the framework of the proposed system and the operational algorithms.

Kim, Yoohwan [ORNL; Sheldon, Frederick T [ORNL; Hively, Lee M [ORNL

2012-01-01T23:59:59.000Z

409

Decadal Covariability of the Northern Wintertime Land Surface Temperature and Atmospheric Circulation  

Science Conference Proceedings (OSTI)

The decadal covariability of northern wintertime land surface temperature and 500-hPa geopotential anomalies is examined using the National Centers for Environmental Prediction–National Center for Atmospheric Research and the Twentieth-Century ...

B. Yu; X. L. Wang; X. B. Zhang; J. Cole; Y. Feng

2014-01-01T23:59:59.000Z

410

On the Stochastic Forcing of Modes of Interannual Southern Ocean Sea Surface Temperature Variability  

Science Conference Proceedings (OSTI)

A simple linearized transport model of anomalous Southern Ocean sea surface temperature (SST) is studied to determine whether it can sustain anomalies of realistic amplitudes under a physically based stochastic forcing. As noted in previous ...

Christopher M. Aiken; Matthew H. England

2005-08-01T23:59:59.000Z

411

Winter Persistence Barrier of Sea Surface Temperature in the Northern Tropical Atlantic Associated with ENSO  

Science Conference Proceedings (OSTI)

This study investigates the persistence characteristics of the sea surface temperature anomaly (SSTA) in the northern tropical Atlantic (NTA). It is found that a persistence barrier exists around December and January. This winter persistence ...

Ruiqiang Ding; Jianping Li

2011-05-01T23:59:59.000Z

412

Attributes of Several Methods for Detecting Discontinuities in Mean Temperature Series  

Science Conference Proceedings (OSTI)

Simulated annual temperature series are used to compare seven homogenization procedures. The two that employ likelihood ratio tests routinely outperform other methods in their ability to identify modest (0.33°C; 0.6 standard deviation anomaly) ...

Arthur T. DeGaetano

2006-03-01T23:59:59.000Z

413

Improvements to NOAA’s Historical Merged Land–Ocean Surface Temperature Analysis (1880–2006)  

Science Conference Proceedings (OSTI)

Observations of sea surface and land–near-surface merged temperature anomalies are used to monitor climate variations and to evaluate climate simulations; therefore, it is important to make analyses of these data as accurate as possible. Analysis ...

Thomas M. Smith; Richard W. Reynolds; Thomas C. Peterson; Jay Lawrimore

2008-05-01T23:59:59.000Z

414

The Role of Sea Surface Temperatures in Interactions between ENSO and the North Pacific Oscillation  

Science Conference Proceedings (OSTI)

The North Pacific Oscillation (NPO) is a decadal to interdecadal fluctuation of sea surface temperatures (SSTs) in the North Pacific. Previous works have shown that during individual El Niño and La Niña winters, atmospheric circulation anomalies ...

David W. Pierce

2002-06-01T23:59:59.000Z

415

Tree-Ring Density Reconstructions of Summer Temperature Patterns across Western North America since 1600  

Science Conference Proceedings (OSTI)

Summer half-year (April-September) mean temperatures are reconstructed across western North America between 1600 and 1982. The reconstructions, ultimately in the form of gridpoint anomaly time series, are produced using a principal-components ...

K. R. Briffa; P. D. Jones; F. H. Schweingruber

1992-07-01T23:59:59.000Z

416

Dominant Modes of Wintertime Upper-Tropospheric Temperature Variations over Asia and Links to Surface Climate  

Science Conference Proceedings (OSTI)

In this study, the authors investigate the variations and predictability of wintertime upper-tropospheric temperature (UTT) over Asia, which are often linked to severe climate anomalies, and the associated features of large-scale circulation and ...

Xingwen Jiang; Song Yang; Yueqing Li; Zongjian Ke; Jianping Li; Haoran Hu

2013-11-01T23:59:59.000Z

417

An Evaluation of Monthly Mean MSU and ECMWF Global Atmospheric Temperatures for Monitoring Climate  

Science Conference Proceedings (OSTI)

Monthly mean brightness temperature anomalies derived from channel 2 of the microwave sounding units (M5Us) on board NOAA satellites over the past decade are examined and compared with both weighted and pressure-level ECMWF monthly mean ...

James W. Hurrell; Kevin E. Trenberth

1992-12-01T23:59:59.000Z

418

Seasonal and Regional Variation of Pan-Arctic Surface Air Temperature over the Instrumental Record  

Science Conference Proceedings (OSTI)

Instrumental surface air temperature (SAT) records beginning in the late 1800s from 59 Arctic stations north of 64°N show monthly mean anomalies of several degrees and large spatial teleconnectivity, yet there are systematic seasonal and regional ...

James E. Overland; Michael C. Spillane; Donald B. Percival; Muyin Wang; Harold O. Mofjeld

2004-09-01T23:59:59.000Z

419

Consistency Check for Trends in Surface Temperature and Upper-Level Circulation: 1950–1992  

Science Conference Proceedings (OSTI)

A time series of 43 years of observed monthly mean air temperature at 109 sites in the 48 contiguous United States is compared to monthly mean air temperature specified from hemispheric gridded 700-mb heights. Because both upper-air and surface ...

Huug M. van den Dool; Edward A. O'Lenic; William H. Klein

1993-12-01T23:59:59.000Z

420

Linkages between Summer Rainfall Variability over South America and Sea Surface Temperature Anomalies  

Science Conference Proceedings (OSTI)

A reconstructed rainfall dataset, and satellite estimates are used to analyze interannual to decadal variability of austral summer precipitation over South America. Rotated empirical orthogonal function (REOF) analysis is applied to isolate ...

Julia N. Paegle; Kingtse C. Mo

2002-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

A Bayesian ANOVA Scheme for Calculating Climate Anomalies, with Applications to the Instrumental Temperature Record  

Science Conference Proceedings (OSTI)

Climate datasets with both spatial and temporal components are often studied after removing from each time series a temporal mean calculated over a common reference interval, which is generally shorter than the overall length of the dataset. The ...

Martin P. Tingley

2012-01-01T23:59:59.000Z

422

Anomaly in the conductivity relaxation parameters at the phase transition of ferroelectric materials: A time domain study  

Science Conference Proceedings (OSTI)

The influence of the ferroelectric to paraelectric transition on the relaxation parameters of conductive processes in ferroelectric materials is studied in the time domain. Three well-known ferroelectric systems were chosen with transition temperatures in different regions, these are, high-temperature PbNb{sub 2}O{sub 6}-based ceramics; nanostructured Pb(Zr{sub 0.6}Ti{sub 0.4})O{sub 3} ceramics; and submicron BaTiO{sub 3}. The thermal evolution of relaxation parameters shows clear anomalies in their typical behavior when conductivity processes arise in the temperature range where the ferroelectric transition takes place. The method here described allows obtaining information about the correlation between charge transport and the motion of the off-center ions at the phase transition.

Leyet, Y.; Guerrero, F. [Departamento de Fisica, Facultad de Ciencias Naturales, Universidad de Oriente, CP-90500, Santiago de Cuba (Cuba); Amorin, H. [Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, 28049 Madrid (Spain); Guerra, J. de Los S. [Instituto de Fisica, Universidade Federal de Uberlandia (UFU), 38400-902 Uberlandia, Minas Gerais Brazil (Brazil); Eiras, J. A. [Departamento de Fisica, Grupo de Ceramicas Ferroeletricas, Universidade Federal de Sao Carlos (UFSCar), CEP 13565-670 Sao Carlos, Sao Paulo (Brazil)

2010-10-18T23:59:59.000Z

423

Chiral Anomaly and Decay of Color Electric Field  

E-Print Network (OSTI)

Using the formula of chiral anomaly, we discuss the pair production of quarks under color electric field $\\vec{E}$ without addressing explicit formula of quark's wavefunctions. The production is assumed to occur under the effect of color magnetic field $\\vec{B}$ as well as the color electric field. We obtain the life time $t_c$ of the color electric field in the limit of $B\\gg E$. Applying it to the glasma in high-energy heavy-ion collisions, we find that $t_c\\simeq 10Q_s^{-1}$ with saturation momentum $Q_s$.

Aiichi Iwazaki

2009-04-09T23:59:59.000Z

424

ARM: Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)  

DOE Data Explorer (OSTI)

Ka-Band Scanning ARM Cloud Radar (KASACR) Hemispherical Sky RHI Scan (6 horizon-to-horizon scans at 30-degree azimuth intervals)

Nitin Bharadwaj; Kevin Widener

425

A Large Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan  

Open Energy Info (EERE)

Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A Large Self-Potential Anomaly And Its Changes On The Quiet Mt Fuji, Japan Details Activities (0) Areas (0) Regions (0) Abstract: Self-potential (SP) surveys were carried out on Mt. Fuji volcano, Japan, and an intense positive anomaly (about 2000 mV) was found in the summit area. The positive SP anomaly was stable on 2001 and 2002, but increased 150 mV in amplitude on September 12, 2003, and suddenly decreased 300 mV two weeks later. This amplitude change coincides with the emergence of the fumaroles, which appeared for the first time in 40 years, on the east-northeast flank 6 km apart from the summit. The SP anomaly is thought

426

The Pioneer Anomaly: Seeking an explanation in newly recovered data  

E-Print Network (OSTI)

The Pioneer 10/11 spacecraft yielded a very accurate navigation that was limited only by a small, anomalous frequency drift of their carrier signals received by the NASA Deep Space Network (DSN). This discrepancy, evident in the data for both spacecraft, was interpreted as an approximately constant acceleration and has become known as the Pioneer anomaly. The origin of this anomaly is as of yet unknown. Recent efforts to explain the effect included a search for independent confirmation, analyses of conventional mechanisms, even ideas rooted in new physics and proposals for a dedicated mission. We assert that before any discussion of new physics and/or a dedicated mission can take place, one must analyze the entire set of radiometric Doppler data received from Pioneers 10 and 11. We report on our efforts to recover and utilize the complete set of radio Doppler and telemetry records of both spacecraft. The collection of radio Doppler data for both missions is now complete; we are ready to begin its evaluation. ...

Toth, V T; Toth, Viktor T; Turyshev, Slava G

2006-01-01T23:59:59.000Z

427

Apparatus for detecting a magnetic anomaly contiguous to remote location by squid gradiometer and magnetometer systems  

DOE Patents (OSTI)

A superconducting quantum interference device (SQUID) magnetic detection apparatus detects magnetic fields, signals, and anomalies at remote locations. Two remotely rotatable SQUID gradiometers may be housed in a cryogenic environment to search for and locate unambiguously magnetic anomalies. The SQUID magnetic detection apparatus can be used to determine the azimuth of a hydrofracture by first flooding the hydrofracture with a ferrofluid to create an artificial magnetic anomaly therein.

Overton, Jr., William C. (Los Alamos, NM); Steyert, Jr., William A. (Los Alamos, NM)

1984-01-01T23:59:59.000Z

428

Rapid reconnaissance of geothermal prospects using shallow temperature surveys. Second technical report  

DOE Green Energy (OSTI)

The previously examined geothermal sites at Long Valley and Coso were studied in much greater detail. Techniques for correcting the 2-m temperature data were evaluated. Using a preliminary model and analysis of the Coso data, the importance of measuring soil thermal diffusivity data at each temperature probe site was shown. Corrected 2-m temperature anomaly at Coso was compared with a low altitude aeromagnetic anomaly and an anomaly outlined by electrical resistivity methods obtained independently. Preliminary tests were made with a simple thermal conductivity probe demonstrating the feasibility of measuring soil thermal diffusivity at the time the 2-m temperatures are recorded. This opens the way for operational shallow temperature surveys in areas which do not have, as at Coso, a simple set of surface conditions. It is concluded that making useful shallow temperature measurements where there is a modest amount of ground water flow need not be a hopeless task.

LeSchack, L.A.; Lewis, J.E.; Chang, D.C.; Lewellen, R.I.; O'Hara, N.W.

1979-03-01T23:59:59.000Z

429

Further Investigation of the Impact of Idealized Continents and SST Distributions on the Northern Hemisphere Storm Tracks  

Science Conference Proceedings (OSTI)

Building on previous studies of the basic ingredients of the North Atlantic storm track (examining land–sea contrast, orography, and SST), this article investigates the impact of Eurasian topography and Pacific SST anomalies on North Pacific and ...

Jérôme Saulière; David James Brayshaw; Brian Hoskins; Michael Blackburn

2012-03-01T23:59:59.000Z

430

Comparison of Direct Normal Irradiance Derived from Silicon and Thermopile Global Hemispherical Radiation Detectors: Preprint  

DOE Green Energy (OSTI)

Concentrating solar applications utilize direct normal irradiance (DNI) radiation, a measurement rarely available. The solar concentrator industry has begun to deploy numerous measurement stations to prospect for suitable system deployment sites. Rotating shadowband radiometers (RSR) using silicon photodiodes as detectors are typically deployed. This paper compares direct beam estimates from RSR to a total hemispherical measuring radiometer (SPN1) multiple fast thermopiles. These detectors simultaneously measure total and diffuse radiation from which DNI can be computed. Both the SPN1 and RSR-derived DNI are compared to DNI measured with thermopile pyrheliometers. Our comparison shows that the SPN1 radiometer DNI estimated uncertainty is somewhat greater than, and on the same order as, the RSR DNI estimates for DNI magnitudes useful to concentrator technologies.

Myers, D. R.

2010-01-01T23:59:59.000Z

431

Multivariate forecast of winter monsoon rainfall in India using SST anomaly as a predictor: Neurocomputing and statistical approaches  

E-Print Network (OSTI)

In this paper, the complexities in the relationship between rainfall and sea surface temperature (SST) anomalies during the winter monsoon (November-January) over India were evaluated statistically using scatter plot matrices and autocorrelation functions.Linear as well as polynomial trend equations were obtained and it was observed that the coefficient of determination for the linear trend was very low and it remained low even when polynomial trend of degree six was used. An exponential regression equation and an artificial neural network with extensive variable selection were generated to forecast the average winter monsoon rainfall of a given year using the rainfall amounts and the sea surface temperature anomalies in the winter monsoon months of the previous year as predictors. The regression coefficients for the multiple exponential regression equation were generated using Levenberg-Marquardt algorithm. The artificial neural network was generated in the form of a multiplayer perceptron with sigmoid non-linearity and genetic-algorithm based variable selection. Both of the predictive models were judged statistically using the Willmott index, percentage error of prediction, and prediction yields. The statistical assessment revealed the potential of artificial neural network over exponential regression.

Goutami Chattopadhyay; Surajit Chattopadhyay; Rajni Jain

2009-10-28T23:59:59.000Z

432

Why did large differences arise in the sea surface temperature datasets across the tropical Pacific during 2012?  

Science Conference Proceedings (OSTI)

During June-November 2012, pronounced differences in tropical Pacific sea-surface temperature (SST) anomalies were observed between three widely used SST products: the Extended Reconstructed SST v3b (ERSSTv3b) and the Optimum Interpolation SSTv2 ...

Boyin Huang; Michelle L’Heureux; Jay Lawrimore; Chunying Liu; Huai-Min Zhang; Viva Banzon; Zeng-Zhen Hu; Arun Kumar

433

Principal Modes of Atmospheric Variability in Model Atmospheres with and without Anomalous Sea Surface Temperature Forcing in the Tropical Pacific  

Science Conference Proceedings (OSTI)

Principal modes of low-frequency atmospheric variability and the influence of sea surface temperature anomalies on such modes are investigated by examining the output from two general circulation model experiments. In the first experiment (the “...

In-Sik Kang; Ngar-Cheung Lau

1986-11-01T23:59:59.000Z

434

The Relationship of Soil Moisture Parameterizations to Subsequent Seasonal and Monthly Mean Temperature in the United States  

Science Conference Proceedings (OSTI)

The water content parameter and the moisture anomaly index, both derived from the Palmer Drought Severity model, were correlated against subsequent mean monthly and seasonal (three-month means) temperatures for 344 climatic divisions in the ...

Thomas R. Karl

1986-04-01T23:59:59.000Z

435

Leading Modes of the Upper-Ocean Temperature Interannual Variability along the Equatorial Atlantic Ocean in NCEP GODAS  

Science Conference Proceedings (OSTI)

In this work, the authors analyze the physical mechanisms of interannual variability of the upper-ocean temperature anomaly (OTA) in the equatorial Atlantic Ocean, using ocean reanalysis from the National Centers for Environmental Prediction (NCEP)...

Zeng-Zhen Hu; Arun Kumar; Bohua Huang; Jieshun Zhu

2013-07-01T23:59:59.000Z

436

A Predominant Reversal in the Relationship between the SAM and East Antarctic Temperatures during the Twenty-First Century  

Science Conference Proceedings (OSTI)

The scientific literature portrays a temporally invariant spatial relationship between the phase of the southern annular mode (SAM) and the sign of surface air temperature (SAT) anomalies across Antarctica. However, here the authors describe a ...

Gareth J. Marshall; Andrew Orr; John Turner

2013-07-01T23:59:59.000Z

437

Log Summarization and Anomaly Detection for TroubleshootingDistributed Systems  

SciTech Connect

Today's system monitoring tools are capable of detectingsystem failures such as host failures, OS errors, and network partitionsin near-real time. Unfortunately, the same cannot yet be said of theend-to-end distributed softwarestack. Any given action, for example,reliably transferring a directory of files, can involve a wide range ofcomplex and interrelated actions across multiple pieces of software:checking user certificates and permissions, getting details for allfiles, performing third-party transfers, understanding re-try policydecisions, etc. We present an infrastructure for troubleshooting complexmiddleware, a general purpose technique for configurable logsummarization, and an anomaly detection technique that works in near-realtime on running Grid middleware. We present results gathered using thisinfrastructure from instrumented Grid middleware and applications runningon the Emulab testbed. From these results, we analyze the effectivenessof several algorithms at accurately detecting a variety of performanceanomalies.

Gunter, Dan; Tierney, Brian L.; Brown, Aaron; Swany, Martin; Bresnahan, John; Schopf, Jennifer M.

2007-08-01T23:59:59.000Z

438

Increasing coverage to improve detection of network and host anomalies  

E-Print Network (OSTI)

For intrusion detection, the LERAD algorithm learns a succinct set of comprehensible rules for detecting anomalies, which could be novel attacks. LERAD validates the learned rules on a separate held-out validation set and removes rules that cause false alarms. However, removing rules with possible high coverage can lead to missed detections. We propose three techniques for increasing coverage- Weighting, Replacement and Hybrid. Weighting retains previously pruned rules and associate weights to them. Replacement, on the other hand, substitutes pruned rules with other candidate rules to ensure high coverage. We also present a Hybrid approach that selects between the two techniques based on training data coverage. Empirical results from seven data sets indicate that, for LERAD, increasing coverage by Weighting, Replacement and Hybrid detects more attacks than Pruning with minimal computational overhead.

Gaurav Tandon; Philip K. Chan

2007-01-01T23:59:59.000Z

439

New Horizons and the Onset of the Pioneer Anomaly  

E-Print Network (OSTI)

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20 - 70 AU from the Sun has indicated the presence of an unmodeled, small, constant, Doppler blue shift which can be interpreted as a constant acceleration of a_P= (8.74 \\pm 1.33) \\times 10^{-8} cm/s^2 directed approximately {\\it towards} the Sun. In addition, there is early (roughly modeled) data from as close in as 5 AU which indicates there may have been an onset of the anomaly near Saturn. We observe that the data now arriving from the New Horizons mission to Pluto and the Kuiper Belt could allow a relatively easy, direct experimental test of whether this onset is associated with distance from the Sun (being, for example, an effect of drag on dark matter). We strongly urge that this test be done.

Nieto, Michael Martin

2008-01-01T23:59:59.000Z

440

New Horizons and the Onset of the Pioneer Anomaly  

E-Print Network (OSTI)

Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20 - 70 AU from the Sun has indicated the presence of an unmodeled, small, constant, Doppler blue shift which can be interpreted as a constant acceleration of a_P= (8.74 \\pm 1.33) \\times 10^{-8} cm/s^2 directed approximately towards the Sun. In addition, there is early (roughly modeled) data from as close in as 5 AU which indicates there may have been an onset of the anomaly near Saturn. We observe that the data now arriving from the New Horizons mission to Pluto and the Kuiper Belt could allow a relatively easy, direct experimental test of whether this onset is associated with distance from the Sun (being, for example, an effect of drag on dark matter). We strongly urge that this test be done.

Michael Martin Nieto

2007-10-26T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

On the Speed of the Eddy-Driven Jet and the Width of the Hadley Cell in the Southern Hemisphere  

Science Conference Proceedings (OSTI)

A strong correlation between the speed of the eddy-driven jet and the width of the Hadley cell is found to exist in the Southern Hemisphere, both in reanalysis data and in twenty-first-century integrations from the Intergovernmental Panel on ...

Paulo Ceppi; Dennis L. Hartmann

2013-05-01T23:59:59.000Z

442

ECMWF Analyses and Forecasts of Stratospheric Winter Polar Vortex Breakup: September 2002 in the Southern Hemisphere and Related Events  

Science Conference Proceedings (OSTI)

Breakup of the polar stratospheric vortex in the Northern Hemisphere is an event that is known to be predictable for up to a week or so ahead. This is illustrated using data from the 45-yr ECMWF Re-Analysis (ERA-40) for the sudden warmings of ...

Adrian Simmons; Mariano Hortal; Graeme Kelly; Anthony McNally; Agathe Untch; Sakari Uppala

2005-03-01T23:59:59.000Z

443

Zonal-Wind Oscillations over the Western Hemisphere during Winter: Further Evidence of a Zonal-Eddy Relationship  

Science Conference Proceedings (OSTI)

The European Centre for Medium-Range Weather Forecasts (ECMWF) 500-mb height analyses and 7-day forecasts are examined during ten winters (1981–90) for oscillations of geostrophic zonal wind over the western hemisphere. A well-defined zonal-wind ...

Steven W. Lyons; Bruce Hundermark

1992-09-01T23:59:59.000Z

444

The Effect of the Divergent Circulation on Some Aspects of the 1978/79 Southern Hemisphere Monsoon  

Science Conference Proceedings (OSTI)

Two aspects of the 1978/79 Southern Hemisphere (SH) monsoon are examined: (i) A double-low (double-high) structure in the lower (upper) levels of the troposphere, which appears over the region adjacent to Australia; and (ii) the poleward shift in ...

Tsing-Chang Chen; Ming-Cheng Yen; Harryvan Loon

1989-11-01T23:59:59.000Z

445

Southern Ocean Climate and Sea Ice Anomalies Associated with the Southern Oscillation  

Science Conference Proceedings (OSTI)

The anomalies in the climate and sea ice cover of the Southern Ocean and their relationships with the Southern Oscillation (SO) are investigated using a 17-yr dataset from 1982 to 1998. The polar climate anomalies are correlated with the Southern ...

R. Kwok; J. C. Comiso

2002-03-01T23:59:59.000Z

446

Simple, state-based approaches to program-based anomaly detection  

Science Conference Proceedings (OSTI)

This article describes variants of two state-based intrusion detection algorithms from Michael and Ghosh [2000] and Ghosh et al. [2000], and gives experimental results on their performance. The algorithms detect anomalies in execution audit data. One ... Keywords: Anomaly detection, finite automata, information system security, intrusion detection, machine learning

C. C. Michael; Anup Ghosh

2002-08-01T23:59:59.000Z

447

Liquid polymorphism and density anomaly in a three-dimensional associating lattice gas  

E-Print Network (OSTI)

Liquid polymorphism and density anomaly in a three-dimensional associating lattice gas Mauricio-dimensional associating lattice gas (ALG) model. This model combines orientational ice-like interactions and "van der the presence of two liquid phase, two critical points and density anomaly. PACS numbers: 1 #12;I. INTRODUCTION

Barbosa, Marcia C. B.

448

Geochemical anomalies in soil and sandstone overlying the Phoenix uranium deposit, Athabasca Basin Natural Resources  

E-Print Network (OSTI)

Collaboration Introduction The Wheeler River Property, host of Denison Mine's Phoenix uranium depositCo Mo Ni UU Geochemical anomalies in soil and sandstone overlying the Phoenix uranium deposit is the most efficient analytical method to detect these anomalies. Athabasca Basin Figure 1: Denison Mine

449

Gravity anomalies of the Northern Hawaiian Islands: Implications on the shield evolutions of Kauai and Niihau  

E-Print Network (OSTI)

Gravity anomalies of the Northern Hawaiian Islands: Implications on the shield evolutions of Kauai January 2010; accepted 16 March 2010; published 31 August 2010. [1] New land and marine gravity data reveal two positive residual gravity anomalies in the Northern Hawaiian Islands: one over Kaua

Ito, Garrett

450

Anomaly detection in extremist web forums using a dynamical systems approach  

Science Conference Proceedings (OSTI)

In this paper, we present preliminary results of analyzing data from the Dark Web collection using a dynamical systems approach for unsupervised anomaly detection. The goal is to provide a robust, focus-of-attention mechanism to identify emerging threats ... Keywords: data mining, dynamical systems, finite-time Lyapunov exponents, unsupervised anomaly detection

Steve Kramer

2010-07-01T23:59:59.000Z

451

Anomaly detection via feature-aided tracking and hidden Markov models  

Science Conference Proceedings (OSTI)

The problem of detecting an anomaly (or abnormal event) is such that the distribution of observations is different before and after an unknown onset time, and the objective is to detect the change by statistically matching the observed pattern with that ... Keywords: anomaly detection, asymmetric threats, change detection, hidden Markov models

Satnam Singh; Haiying Tu; William Donat; Krishna Pattipati; Peter Willett

2009-01-01T23:59:59.000Z

452

M-AID: An adaptive middleware built upon anomaly detectors for intrusion detection and rational response  

Science Conference Proceedings (OSTI)

Anomaly-based intrusion detection is about the discrimination of malicious and legitimate behaviors on the basis of the characterization of system normality in terms of particular observable subjects. As the system normality is constructed solely from ... Keywords: Anomaly detection, POMDP, intrusion detection, network security, security metrics, security policy

Zonghua Zhang; Hong Shen

2009-11-01T23:59:59.000Z

453

Weighting versus pruning in rule validation for detecting network and host anomalies  

Science Conference Proceedings (OSTI)

For intrusion detection, the LERAD algorithm learns a succinct set of comprehensible rules for detecting anomalies, which could be novel attacks. LERAD validates the learned rules on a separate held-out validation set and removes rules that cause ... Keywords: anomaly detection, machine learning, rule pruning, rule weighting

Gaurav Tandon; Philip K. Chan

2007-08-01T23:59:59.000Z

454

Anomaly detection in wireless sensor networks using self-organizing map and wavelets  

Science Conference Proceedings (OSTI)

Wireless Sensor Networks (WSNs) have been applied in agriculture monitoring to monitor and collect various physical attributes within a specific area. It is important to detect data anomalies to determine a suitable course of action. The underlying aim ... Keywords: agriculture monitoring, anomaly detection, discrete wavelet transform, self-organizing map, wavelets, wireless sensor networks

Supakit Siripanadorn; Wipawee Hattagam; Neung Teaumroong

2010-10-01T23:59:59.000Z

455

DADICC: Intelligent system for anomaly detection in a combined cycle gas turbine plant  

Science Conference Proceedings (OSTI)

DADICC is the abbreviated name for an intelligent system able to detect on-line and diagnose anomalies as soon as possible in the dynamic evolution of the behaviour of a power plant based on a combined cycle gas turbine. In order to reach this objective, ... Keywords: Anomaly detection, Diagnosis, Expert system, Multi-agent system, Neural network, Normal behaviour

Antonio Arranz; Alberto Cruz; Miguel A. Sanz-Bobi; Pablo Ruíz; Josué Coutiño

2008-05-01T23:59:59.000Z

456

One class classification for anomaly detection: support vector data description revisited  

Science Conference Proceedings (OSTI)

The Support Vector Data Description (SVDD) has been introduced to address the problem of anomaly (or outlier) detection. It essentially fits the smallest possible sphere around the given data points, allowing some points to be excluded as outliers. Whether ... Keywords: anomaly detection, minimal sphere fitting, one class classification, outlier detection, support vector data description

Eric J. Pauwels; Onkar Ambekar

2011-08-01T23:59:59.000Z

457

Development of 2-Meter Soil Temperature Probes and Results of Temperature  

Open Energy Info (EERE)

Development of 2-Meter Soil Temperature Probes and Results of Temperature Development of 2-Meter Soil Temperature Probes and Results of Temperature Survey Conducted at Desert Peak, Nevada, USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Development of 2-Meter Soil Temperature Probes and Results of Temperature Survey Conducted at Desert Peak, Nevada, USA Abstract Temperature gradient drilling has historically been a key tool in the exploration for geothermal resources in the Great Basin, USA but regulatory, environmental, and accessibility issues, as well as the expense of drilling, are increasingly limiting its use. In cases where thermal groundwater is not overlain by near-surface cold aquifers, temperatures measured at a depth of 2-meters is an efficient method for mapping thermal anomalies at a high level of detail. This is useful for augmenting deeper

458

Variability in Daily, Zonal Mean Lower-Stratospheric Temperatures  

Science Conference Proceedings (OSTI)

Satellite data from the microwave sounding unit (MSU) channel 4, when carefully merged, provide daily zonal anomalies of lower-stratosphere temperature with a level of precision between 0.01° and 0.08°C per 2.5° latitude band. Global averages of ...

John R. Christy; S. James Drouilhet Jr.

1994-01-01T23:59:59.000Z

459

Possible Causes of Anomalies in Seasonal Mean Circulation Patterns during the 1982–83 El Niño Event  

Science Conference Proceedings (OSTI)

For six consecutive seasons around the 1982–83 El Niño event the relation between observed anomalies in atmospheric circulation patterns and anomalies in various forcing mechanisms is diagnosed. A linear model is used in an attempt to simulate ...

C. J. Kok; J. D. Opsteegh

1985-04-01T23:59:59.000Z

460

Impact of Vegetation Feedback on the Response of Precipitation to Antecedent Soil Moisture Anomalies over North America  

Science Conference Proceedings (OSTI)

Previous studies support a positive soil moisture–precipitation feedback over a major fraction of North America; that is, initial soil moisture anomalies lead to precipitation anomalies of the same sign. To investigate how vegetation feedback ...

Yeonjoo Kim; Guiling Wang

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Strength anomaly in B2 FeAl single crystals  

Science Conference Proceedings (OSTI)

Strength and deformation microstructure of B2 Fe-39 and 48%Al single crystals (composition given in atomic percent), which were fully annealed to remove frozen-in vacancies, have been investigated at temperatures between room temperature and 1073K. The hardness of as-homogenized Fe-48Al is higher than that of as-homogenized Fe-39Al while after additional annealing at 698K the hardness of Fe-48Al becomes lower than that of Fe-39Al. Fe-39Al single crystals slowly cooled after homogenizing at a high temperature were deformed in compression as a function of temperature and crystal orientation. A peak of yield strength appears around 0.5T{sub m} (T{sub m} = melting temperature). The orientation dependence of the critical resolved shear stress does not obey Schmid`s law even at room temperature and is quite different from that of b.c.c. metals and B2 intermetallics at low temperatures. At the peak temperature slip transition from -type to -type is found to occur macroscopically and microscopically, while it is observed in TEM that some of the [111] dislocations decompose into [101] and [010] on the (1096I) plane below the peak temperature. The physical sources for the positive temperature dependence of yield stress of B2 FeAl are discussed based on the obtained results.

Yoshimi, K.; Hanada, S.; Yoo, M.H. [Oak Ridge National Lab., TN (United States); Matsumoto, N. [Tohoku Univ. (Japan). Graduate School

1994-12-31T23:59:59.000Z

462

Hydrocarbon anomaly in soil gas as near-surface expressions of upflows and outflows in geothermal systems  

SciTech Connect

A variety of hydrocarbons, C1 - C12, have been found in volcanic gases (fumarolic) and in geothermal waters and gases. The hydrocarbons are thought to have come from products of pyrolysis of kerogen in sedimentary rocks or they could be fed into the geothermal system by the recharging waters which may contain dissolved hydrocarbons or hydrocarbons extracted by the waters from the rocks. In the hot geothermal zone, 300°+ C, many of these hydrocarbons are in their critical state. It is thought that they move upwards due to buoyancy and flux up with the upflowing geothermal fluids in the upflow zones together with the magmatic gases. Permeability which could be provided by faults, fissures, mini and micro fractures are thought to provide pathways for the upward flux. A sensitive technique (Petrex) utilizing passive integrative adsorption of the hydrocarbons in soil gas on activated charcoal followed by desorption and analysis of the hydrocarbons by direct introduction mass spectrometry allows mapping of the anomalous areas. Surveys for geothermal resources conducted in Japan and in Indonesia show that the hydrocarbon anomaly occur over known fields and over areas strongly suspected of geothermal potential. The hydrocarbons found and identified were n-paraffins (C7-C9) and aromatics (C7-C8). Detection of permeable, i.e. active or open faults, parts of older faults which have been reactivated, e.g. by younger intersecting faults, and the area surrounding these faulted and permeable region is possible. The mechanism leading to the appearance of the hydrocarbon in the soil gas over upflow zones of the geothermal reservoir is proposed. The paraffins seems to be better pathfinders for the location of upflows than the aromatics. However the aromatics may, under certain circumstances, give better indications of the direction of the outflow of the geothermal system. It is thought that an upflow zone can be defined when conditions exist where the recharging waters containing the hydrocarbons feed into the geothermal kitchen. The existence of open and active faults, fissures, mini and micro fractures allow sufficient permeability for the gases to flux up and express themselves at the surface as hydrocarbon anomaly in the soil gas. When any of the requirements is absent, i.e. in the absence of the recharging waters, hydrocarbons, temperature, or permeability, no anomaly can be expected. It assumes a dynamic convective system, i.e. recharging waters, upflow and outflow. The anomalies however can define to a certain extent, regions of geothermal upflow, buoyant transport of gases, and frequently down-gradient of cooling waters.

Ong, H.L.; Higashihara, M.; Klusman, R.W.; Voorhees, K.J.; Pudjianto, R.; Ong, J

1996-01-24T23:59:59.000Z

463

Hydrocarbon anomaly in soil gas as near-surface expressions of upflows and outflows in geothermal systems  

Science Conference Proceedings (OSTI)

A variety of hydrocarbons, C1 - C12, have been found in volcanic gases (fumarolic) and in geothermal waters and gases. The hydrocarbons are thought to have come from products of pyrolysis of kerogen in sedimentary rocks or they could be fed into the geothermal system by the recharging waters which may contain dissolved hydrocarbons or hydrocarbons extracted by the waters from the rocks. In the hot geothermal zone, 300°+ C, many of these hydrocarbons are in their critical state. It is thought that they move upwards due to buoyancy and flux up with the upflowing geothermal fluids in the upflow zones together with the magmatic gases. Permeability which could be provided by faults, fissures, mini and micro fractures are thought to provide pathways for the upward flux. A sensitive technique (Petrex) utilizing passive integrative adsorption of the hydrocarbons in soil gas on activated charcoal followed by desorption and analysis of the hydrocarbons by direct introduction mass spectrometry allows mapping of the anomalous areas. Surveys for geothermal resources conducted in Japan and in Indonesia show that the hydrocarbon anomaly occur over known fields and over areas strongly suspected of geothermal potential. The hydrocarbons found and identified were n-paraffins (C7-C9) and aromatics (C7-C8). Detection of permeable, i.e. active or open faults, parts of older faults which have been reactivated, e.g. by younger intersecting faults, and the area surrounding these faulted and permeable region is possible. The mechanism leading to the appearance of the hydrocarbon in the soil gas over upflow zones of the geothermal reservoir is proposed. The paraffins seems to be better pathfinders for the location of upflows than the aromatics. However the aromatics may, under certain circumstances, give better indications of the direction of the outflow of the geothermal system. It is thought that an upflow zone can be defined when conditions exist where the recharging waters containing the hydrocarbons feed into the geothermal kitchen. The existence of open and active faults, fissures, mini and micro fractures allow sufficient permeability for the gases to flux up and express themselves at the surface as hydrocarbon anomaly in the soil gas. When any of the requirements is absent, i.e. in the absence of the recharging waters, hydrocarbons, temperature, or permeability, no anomaly can be expected. It assumes a dynamic convective system, i.e. recharging waters, upflow and outflow. The anomalies however can define to a certain extent, regions of geothermal upflow, buoyant transport of gases, and frequently down-gradient of cooling waters.

Ong, H.L.; Higashihara, M.; Klusman, R.W.; Voorhees, K.J.; Pudjianto, R.; Ong, J

1996-01-24T23:59:59.000Z

464

SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) 2013  

SciTech Connect

There is a significant need to protect the nation’s energy infrastructures from malicious actors using cyber methods. Supervisory, Control, and Data Acquisition (SCADA) systems may be vulnerable due to the insufficient security implemented during the design and deployment of these control systems. This is particularly true in older legacy SCADA systems that are still commonly in use. The purpose of INL’s research on the SCADA Protocol Anomaly Detection Utilizing Compression (SPADUC) project was to determine if and how data compression techniques could be used to identify and protect SCADA systems from cyber attacks. Initially, the concept was centered on how to train a compression algorithm to recognize normal control system traffic versus hostile network traffic. Because large portions of the TCP/IP message traffic (called packets) are repetitive, the concept of using compression techniques to differentiate “non-normal” traffic was proposed. In this manner, malicious SCADA traffic could be identified at the packet level prior to completing its payload. Previous research has shown that SCADA network traffic has traits desirable for compression analysis. This work investigated three different approaches to identify malicious SCADA network traffic using compression techniques. The preliminary analyses and results presented herein are clearly able to differentiate normal from malicious network traffic at the packet level at a very high confidence level for the conditions tested. Additionally, the master dictionary approach used in this research appears to initially provide a meaningful way to categorize and compare packets within a communication channel.

Gordon Rueff; Lyle Roybal; Denis Vollmer

2013-01-01T23:59:59.000Z

465

Extrapolated experimental critical parameters of unreflected and steel-reflected massive enriched uranium metal spherical and hemispherical assemblies  

SciTech Connect

Sixty-nine critical configurations of up to 186 kg of uranium are reported from very early experiments (1960s) performed at the Rocky Flats Critical Mass Laboratory near Denver, Colorado. Enriched (93%) uranium metal spherical and hemispherical configurations were studied. All were thick-walled shells except for two solid hemispheres. Experiments were essentially unreflected; or they included central and/or external regions of mild steel. No liquids were involved. Critical parameters are derived from extrapolations beyond subcritical data. Extrapolations, rather than more precise interpolations between slightly supercritical and slightly subcritical configurations, were necessary because experiments involved manually assembled configurations. Many extrapolations were quite long; but the general lack of curvature in the subcritical region lends credibility to their validity. In addition to delayed critical parameters, a procedure is offered which might permit the determination of prompt critical parameters as well for the same cases. This conjectured procedure is not based on any strong physical arguments.

Rothe, R.E.

1997-12-01T23:59:59.000Z

466

Sulfur, Chlorine, and Argon Abundances in Planetary Nebulae. IV: Synthesis and the Sulfur Anomaly  

E-Print Network (OSTI)

We have compiled a large sample of O, Ne, S, Cl, and Ar abundances which have been determined for 85 galactic planetary nebulae in a consistent and homogeneous manner using spectra extending from 3600-9600 Angstroms. Sulfur abundances have been computed using the near IR lines of [S III] 9069,9532 along with [S III] temperatures. We find average values, expressed logarithmically with a standard deviation, of log(S/O)=-1.91(+/-.24), log(Cl/O)=-3.52(+/-.16), and log(Ar/O)=-2.29(+/-.18), numbers consistent with previous studies of both planetary nebulae and H II regions. We also find a strong correlation between [O III] and [S III] temperatures among planetary nebulae. In analyzing abundances of Ne, S, Cl, and Ar with respect to O, we find a tight correlation for Ne-O, and loose correlations for Cl-O and Ar-O. All three trends appear to be colinear with observed correlations for H II regions. S and O also show a correlation but there is a definite offset from the behavior exhibited by H II regions and stars. We suggest that this S anomaly is most easily explained by the existence of S^+3, whose abundance must be inferred indirectly when only optical spectra are available, in amounts in excess of what is predicted by model-derived ionization correction factors. Finally for the disk PNe, abundances of O, Ne, S, Cl, and Ar all show gradients when plotted against galactocentric distance. The slopes are statistically indistinguishable from one another, a result which is consistent with the notion that the cosmic abundances of these elements evolve in lockstep.

R. B. C. Henry; K. B. Kwitter; Bruce Balick

2004-01-09T23:59:59.000Z

467

Radiance Temperature  

Science Conference Proceedings (OSTI)

... Temperature using Detectors Calibrated for Absolute Spectral Power Response, HW ... A Third Generation Water Bath Based Blackbody Source, JB ...

2013-06-27T23:59:59.000Z

468

Self-energy anomaly of an electric pointlike dipole in three-dimensional static spacetimes  

E-Print Network (OSTI)

We calculate the self-energy anomaly of a pointlike electric dipole located in a static $(2+1)$-dimensional curved spacetime. The energy functional for this problem is invariant under an infinite-dimensional (gauge) group of transformations parameterized by one scalar function of two variables. We demonstrate that the problem of the calculation of the self-energy anomaly for a pointlike dipole can be reduced to the calculation of quantum fluctuations of an effective two-dimensional Euclidean quantum field theory. We reduced the problem in question to the calculation of the conformal anomaly of an effective scalar field in two dimensions and obtained an explicit expression for the self-energy anomaly of an electric dipole in an asymptotically flat, regular $(2+1)$-dimensional spacetime which may have electrically neutral black-hole-like metrics with regular Killing horizon.

Valeri P. Frolov; Andrey A. Shoom; Andrei Zelnikov

2013-03-07T23:59:59.000Z

469

Maintenance of Circulation Anomalies during the 1988 Drought and 1993 Floods over the United States  

Science Conference Proceedings (OSTI)

The large-scale circulation anomalies associated with the 1988 drought and the 1993 floods are investigated with the National Centers for Environmental Prediction Reanalysis data and a linear stationary wave model. The transient vorticity and ...

Alan Z. Liu; Mingfang Ting; Hailan Wang

1998-09-01T23:59:59.000Z

470

Seasonality of the ENSO-Related Rainfall Variability in Central Chile and Associated Circulation Anomalies  

Science Conference Proceedings (OSTI)

The seasonality of the ENSO–rainfall relationship in central Chile (30°–41°S) and associated circulation anomalies are studied using correlation and compositing techniques. During El Niño episodes there is a tendency for the occurrence of above-...

Aldo Montecinos; Patricio Aceituno

2003-01-01T23:59:59.000Z

471

Modeling the Surface Heat Flux Response to Long-Lived SST Anomalies in the North Atlantic  

Science Conference Proceedings (OSTI)

An atmospheric general circulation model (AGCM), a simplified atmospheric model (SAM) of surface heat flux, and various idealized analytic models have been used to investigate the atmospheric response over the North Atlantic to SST anomalies ...

S. B. Power; R. Kleeman; R. A. Colman; B. J. McAvaney

1995-09-01T23:59:59.000Z

472

Diagnosis of Regional Monthly Anomalies Using the Adjoint Method. Part II: Potential Vorticity  

Science Conference Proceedings (OSTI)

An equivalent barotropic tracer model and its adjoint are used to examine observed central European anomalies of potential vorticity (PV) in terms of advection and diabatic effects. The PV viewpoint yields a similar picture of six January ...

Andrew W. Robertson

1992-06-01T23:59:59.000Z

473

The COLA Global Coupled and Anomaly Coupled Ocean–Atmosphere GCM  

Science Conference Proceedings (OSTI)

The Center for Ocean–Land–Atmosphere Studies (COLA) global coupled and anomaly coupled ocean–atmosphere GCM models are described. The ocean and atmosphere components of these coupled models are identical. The only difference between them is in ...

Ben P. Kirtman; Yun Fan; Edwin K. Schneider

2002-09-01T23:59:59.000Z

474

Role of Multiple-Level Tropospheric Circulations in Forcing ENSO Winter Precipitation Anomalies  

Science Conference Proceedings (OSTI)

Regionally organized winter (DJF) precipitation anomalies over North America are presented in association with cold and warm phases of the El Niño–Southern Oscillation. Variations in low-level flow from moisture sources and in upper-level dynamic ...

Shawn R. Smith; Phaedra M. Green; Alan P. Leonardi; James J. O’Brien

1998-12-01T23:59:59.000Z

475

Atmospheric Circulation Anomalies during Episodes of Enhanced and Reduced Convective Cloudiness over Uruguay  

Science Conference Proceedings (OSTI)

Regional and large-scale circulation anomalies associated with periods of enhanced and reduced convective cloudiness over Uruguay are studied for austral spring and summer, when rainfall associated with deep convection is more frequent in this ...

Alvaro DÍaz; Patricio Aceituno

2003-10-01T23:59:59.000Z

476

A String Function for Describing the Propagation of Baroclinic Anomalies in the Ocean  

Science Conference Proceedings (OSTI)

The authors derive a string function that describes the propagation of large-scale, potentially large amplitude, baroclinic energy anomalies in a two-layer ocean with variable topography and rotation parameter. The generality of the two-layer ...

Robert H. Tyler; Rolf Käse

2001-03-01T23:59:59.000Z

477

Formation and Evolution of Frontal Rainbands and Geostrophic Potential Vorticity Anomalies  

Science Conference Proceedings (OSTI)

A viscous semigeostrophic model is developed and used to study the formation and evolution of frontal rainbands in association with the dry and moist geostrophic potential vorticity (GPV) anomalies. The numerical results show that when moist GPV (...

Qin Xu

1992-04-01T23:59:59.000Z

478

Anomaly detection in noisy and irregular time series: the "turbodiesel charging pressure" case study  

Science Conference Proceedings (OSTI)

In this paper we consider the problem of detecting anomalies in sample series obtained from critical train subsystems. Our study is the analysis of charging pressure in turbodiesel engines powering a fleet of passenger trains. We describe an automated ...

Anahì Balbi; Michael Provost; Armando Tacchella

2010-06-01T23:59:59.000Z

479

Latent and Sensible Heat Flux Anomalies over the Northern Oceans: The Connection to Monthly Atmospheric Circulation  

Science Conference Proceedings (OSTI)

The influence of the atmospheric circulation on monthly anomalies of ocean surface latent and sensible heat fluxes is explored. The fluxes are estimated using bulk formulas applied to a set of about four decades of marine observations over 1946–...

Daniel R. Cayan

1992-04-01T23:59:59.000Z

480

Z' Bosons, the NuTeV Anomaly, and the Higgs Boson Mass  

E-Print Network (OSTI)

NuTeV Anomaly, and the Higgs Boson Mass Michael S. Chanowitzpredicted value of the Higgs boson mass, from ? 60 to ? 120from an increase in the Higgs boson mass. There is a vast

Chanowitz, Michael S

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "hemispheric temperature anomalies" 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

Estimation of Tropical Sea Level Anomaly by an Improved Kalman Filter  

Science Conference Proceedings (OSTI)

Kaiman filter theory and autoregressive time series are used to map sea level height anomalies in the tropical Pacific. Our Kalman filters are implemented with a linear state space model consisting of evolution equations for the amplitudes of ...

Ngai Hang Chan; Joseph B. Kadane; Robert N. Miller; Wilfredo Palma

1996-07-01T23:59:59.000Z

482

Steady Linear Response to Thermal Forcing of an Anomaly Model with an Asymmetric Climatology  

Science Conference Proceedings (OSTI)

An anomaly model linearized around the observed winter climatology is used to study the steady response of the atmosphere to diabatic heating. The model is an R7, nine vertical levels, primitive equations, fully spectral model, derived from the ...

A. Navarra

1990-01-01T23:59:59.000Z

483

Do Stationary Waves Drive the Zonal-Mean Jet Anomalies of the Northern Winter?  

Science Conference Proceedings (OSTI)

The role of zonal-mean zonal flow (u) perturbations in generating anomalous stationary waves has been acknowledged since the 1939 study by Rossby and his collaborators. However, the dynamical mechanisms, which in turn produce the u anomalies, are ...

Eric DeWeaver; Sumant Nigam

2000-07-01T23:59:59.000Z

484

Deducing Anomalous Wave Source Regions during the Life Cycles of Persistent Flow Anomalies  

Science Conference Proceedings (OSTI)

Anomalous wave source regions are identified during the life cycles of persistent flow anomalies occurring over the North Pacific and North Atlantic Oceans during boreal winter. These cases project strongly upon the Pacific–North American and ...

Robert X. Black

1997-04-01T23:59:59.000Z

485

Circulation Regimes of Rainfall Anomalies in the African-South Asian Monsoon Belt  

Science Conference Proceedings (OSTI)

This study explores the spatial differentiation of climate anomalies and associated circulation mechanisms across the African-South Asian monsoon belt through empirical analyses mainly for the period 1948–83. Observations include surface ship ...

Uma S. Bhatt

1989-10-01T23:59:59.000Z

486

Classification of 500 mb Height Anomalies Using Obliquely Rotated Principal Components  

Science Conference Proceedings (OSTI)

The objective of this study was to classify 500 mb height anomaly patterns for North America using principal component analysis with oblique rotation. Two versions of the oblique rotation, oblimax and direct oblimin, were applied to two gridded ...

Stewart J. Cohen

1983-12-01T23:59:59.000Z

487

Stratospheric Temperature Change as a Function of Height and Sunspot Number during 1972–89 Based on Rocketsonde and Radiosonde Data  

Science Conference Proceedings (OSTI)

Based on linear regression analysis applied to temperatures at 6 rocketsonde and 12 radiosonde stations mostly in the western half of the Northern Hemisphere, between 1972 and 1989 the temperature changed by nearly ?0.5°C/decade in the low ...

J. K. Angell

1991-12-01T23:59:59.000Z

488

Structure of Large-Scale Convective Anomalies over Tropical Oceans  

Science Conference Proceedings (OSTI)

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

David S. Gutzler; Tamara M. Wood

1990-04-01T23:59:59.000Z

489

One-Month Forecast Experiments—without Anomaly Boundary Forcings  

Science Conference Proceedings (OSTI)

A series of one-month forecasts were carried out for eight January cases, using a particular prediction model and prescribing climatological sea-surface temperature as the boundary condition. Each forecast is a stochastic prediction that consists ...

K. Miyakoda; J. Sirutis; J. Ploshay

1986-12-01T23:59:59.000Z

490

Feasibility of detecting artificial magnetic anomalies in hydrofractured rock by superconducting gradiometer-SQUID systems  

DOE Green Energy (OSTI)

A study of the signal physics of magnetic anomaly detection by superconducting gradiometer-SQUID systems to determine the feasibility of possible applications to the geothermal energy program is described. The system would make full use of the incredible sensitivity of the superconducting quantum interference device (SQUID) which can be in the range of 10/sup -11/ Oe. In addition to magnetic anomalies in the earth's field produced by spherical distributions of magnetic matter, anomalies that would be artificially produced by flooding magnetic material into cracks produced by hydrofracturing in deep boreholes drilled into dry rock geothermal sources are considered. The study indicates that surface detection by horizontal and vertical gradiometers of crack anomalies will not be feasible if the magnetic material flooding the crack is a paramagnetic solution. However, one can concoct a slurry to carry prepolarized ferromagnetic particles of a size sufficiently large to permit domain formation but small enough to permit rotation and alignment in the earth's field. In this case, the anomaly signal is large enough to permit extraction of anomaly orientation information out of the background of magnetic noise and earth's field gradients. The superconducting gradiometer-SQUID system is shown to be exceptional in its capability of removing undesirable magnetic noise and gradients. The greatest promise was found in systems that would be comprised of a magnetometer or gradiometer that could be lowered into the borehole to positions opposite the formations cracked by hydrofracturing. The use of a paramagnetic material to produce the artificial anomaly will not provide signals of sufficient amplitude to overcome the magnetic noise. However, the slurry containing only one percent by volume of ferromagnetic particles will produce a crack anomaly that is easily detectable by magnetometer or by the superconducting gradiometer-SQUID system.

Overton, W.C. Jr.

1976-12-01T23:59:59.000Z

491

Regional Characteristics of the Northern Hemisphere Wintertime Circulation: A Comparison of the Simulation of a GFDL General Circulation Model with Observations  

Science Conference Proceedings (OSTI)

The hemispheric distributions of a selected set of temporal mean, variance and covariance statistics produced by a general circulation model developed at the Geophysical Fluid Dynamics Laboratory are compared with observations. The fields ...

Maurice L. Blackmon; Ngar-Cheung Lau

1980-03-01T23:59:59.000Z

492

The Roles of External Forcings and Internal Variabilities in the Northern Hemisphere Atmospheric Circulation Change from the 1960s to the 1990s  

Science Conference Proceedings (OSTI)

The Northern Hemisphere atmospheric circulation change from the 1960s to the 1990s shows a strong positive North Atlantic Oscillation (NAO) and a deepening of the Aleutian low. The issue regarding the contributions of external forcings and ...

Martin P. King; Fred Kucharski; Franco Molteni

2010-12-01T23:59:59.000Z

493

Response of the Wintertime Northern Hemisphere Atmospheric Circulation to Current and Projected Arctic Sea Ice Decline: A Numerical Study with CAM5  

Science Conference Proceedings (OSTI)

The wintertime Northern Hemisphere (NH) atmospheric circulation response to current (2007–12) and projected (2080–99) Arctic sea ice decline is examined with the latest version of the Community Atmospheric Model (CAM5). The numerical experiments ...

Yannick Peings; Gudrun Magnusdottir

2014-01-01T23:59:59.000Z

494

An Energetics Study of Wintertime Northern Hemisphere Storm Tracks under 4 × CO2 Conditions in Two Ocean–Atmosphere Coupled Models  

Science Conference Proceedings (OSTI)

Different possible behaviors of winter Northern Hemisphere storm tracks under 4 × CO2 forcing are considered by analyzing the response of two of the ocean–atmosphere coupled models that were run for the fourth Assessment Report of the ...

Alexandre Laîné; Masa Kageyama; David Salas-Mélia; Gilles Ramstein; Serge Planton; Sébastien Denvil; Sophie Tyteca

2009-02-01T23:59:59.000Z

495

Evaluation of Interior Circulation in a High-Resolution Global Ocean Model. Part II: Southern Hemisphere Intermediate, Mode, and Thermocline Waters  

Science Conference Proceedings (OSTI)

A high-resolution, offline ocean general circulation model, incorporating a realistic parameterization of mixed layer convection, is used to diagnose pathways and time scales of Southern Hemisphere intermediate, mode, and lower thermocline water ...

Alexander Sen Gupta; Matthew H. England

2007-11-01T23:59:59.000Z

496

Assessing the Increasing Trend in Northern Hemisphere Winter Storm Track Activity Using Surface Ship Observations and a Statistical Storm Track Model  

Science Conference Proceedings (OSTI)

Recent studies, based largely on analyses of reanalysis datasets, suggest that the Northern Hemisphere winter storm track activity has increased significantly during the second half of the twentieth century. In this study, this increasing trend, ...

Edmund K. M. Chang

2007-11-01T23:59:59.000Z

497

Interannual Variability in the Northern Hemisphere Winter Middle Atmosphere in Control and Perturbed Experiments with the GFDL SKYHI General Circulation Model  

Science Conference Proceedings (OSTI)

This paper reports on interannual variability of the Northern Hemisphere winter stratospheric circulation as simulated by the 40-level GFDL “SKYHI” general circulation model. A 31-year control simulation was performed using a climatological ...

Kevin Hamilton

1995-01-01T23:59:59.000Z

498

Wave Packets and Life Cycles of Troughs in the Upper Troposphere: Examples from the Southern Hemisphere Summer Season of 1984/85  

Science Conference Proceedings (OSTI)

In this paper, reanalysis data for the Southern Hemisphere summer season of 1984/85, produced by the European Centre for Medium-Range Weather Forecasts, have been analyzed to examine wave packets and life cycles of baroclinic waves. A ...

Edmund K. M. Chang

2000-01-01T23:59:59.000Z

499

Transfer of Sensible Heat by Transient Eddies in the Atmosphere on the Southern Hemisphere: An Appraisal of the Data before and during FGGE  

Science Conference Proceedings (OSTI)

Although the numerical, daily operational analyses for the Southern Hemisphere, in particular those made in Australia since 1972, can be used to describe large-scale features in time and space, they are not suited to computations of quantities ...

Harry Van Loon

1980-11-01T23:59:59.000Z

500

Addressing the Challenges of Anomaly Detection for Cyber Physical Energy Grid Systems  

Science Conference Proceedings (OSTI)

The consolidation of cyber communications networks and physical control systems within the energy smart grid introduces a number of new risks. Unfortunately, these risks are largely unknown and poorly understood, yet include very high impact losses from attack and component failures. One important aspect of risk management is the detection of anomalies and changes. However, anomaly detection within cyber security remains a difficult, open problem, with special challenges in dealing with false alert rates and heterogeneous data. Furthermore, the integration of cyber and physical dynamics is often intractable. And, because of their broad scope, energy grid cyber-physical systems must be analyzed at multiple scales, from individual components, up to network level dynamics. We describe an improved approach to anomaly detection that combines three important aspects. First, system dynamics are modeled using a reduced order model for greater computational tractability. Second, a probabilistic and principled approach to anomaly detection is adopted that allows for regulation of false alerts and comparison of anomalies across heterogeneous data sources. Third, a hierarchy of aggregations are constructed to support interactive and automated analyses of anomalies at multiple scales.

Ferragut, Erik M [ORNL; Laska, Jason A [ORNL; Melin, Alexander M [ORNL; Czejdo, Bogdan [ORNL

2013-01-01T23:59:59.000Z