q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data
Recent Antarctic climate variability on month-to-month to interannual time scales is assessed through joint analysis of surface temperatures from satellite thermal infrared observations (TIR) and passive microwave bright-ness temperatures (TB). Although TIR data are limited to clear-sky conditions a...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.581.2136 2023-05-15T13:33:00+02:00 q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data David P. Schneider Eric J. Steig Josefino C. Comiso The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.2136 http://depts.washington.edu/isolab/papers/Schneideretal.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.2136 http://depts.washington.edu/isolab/papers/Schneideretal.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://depts.washington.edu/isolab/papers/Schneideretal.pdf text 2003 ftciteseerx 2016-01-08T13:01:53Z Recent Antarctic climate variability on month-to-month to interannual time scales is assessed through joint analysis of surface temperatures from satellite thermal infrared observations (TIR) and passive microwave bright-ness temperatures (TB). Although TIR data are limited to clear-sky conditions and TB data are a product of the temperature and emissivity of the upper;1 m of snow, the two datasets share significant covariance. This covariance is largely explained by three empirical modes, which illustrate the spatial and temporal variability of Antarctic surface temperatures. The TB variations are damped compared to TIR variations, as determined by the period of the temperature forcing and the microwave emission depth; however, microwave emissivity does not vary significantly in time. Comparison of the temperature modes with Southern Hemisphere (SH) 500-hPa geopotential height anomalies demonstrates that Antarctic temperature anomalies are predominantly controlled by the principal patterns of SH atmospheric circulation. The leading surface temperature mode strongly correlates with the Southern Annular Mode (SAM) in geopotential height. The second temperature mode reflects the combined influences of the zonal wavenumber-3 and Pacific–South American (PSA) patterns in 500-hPa height on month-to-month time scales. ENSO variability projects onto this mode on interannual time scales, but is not by itself a good predictor of Antarctic temperature anomalies. The third temperature mode explains winter warming trends, which may be caused by blocking events, over a large region of the East Antarctic plateau. These results help to place recent climate changes in the context of Antarctica’s background climate variability and will aid in the interpretation of ice core paleoclimate records. 1. Text Antarc* Antarctic Antarctica ice core Unknown Antarctic Pacific |
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English |
description |
Recent Antarctic climate variability on month-to-month to interannual time scales is assessed through joint analysis of surface temperatures from satellite thermal infrared observations (TIR) and passive microwave bright-ness temperatures (TB). Although TIR data are limited to clear-sky conditions and TB data are a product of the temperature and emissivity of the upper;1 m of snow, the two datasets share significant covariance. This covariance is largely explained by three empirical modes, which illustrate the spatial and temporal variability of Antarctic surface temperatures. The TB variations are damped compared to TIR variations, as determined by the period of the temperature forcing and the microwave emission depth; however, microwave emissivity does not vary significantly in time. Comparison of the temperature modes with Southern Hemisphere (SH) 500-hPa geopotential height anomalies demonstrates that Antarctic temperature anomalies are predominantly controlled by the principal patterns of SH atmospheric circulation. The leading surface temperature mode strongly correlates with the Southern Annular Mode (SAM) in geopotential height. The second temperature mode reflects the combined influences of the zonal wavenumber-3 and Pacific–South American (PSA) patterns in 500-hPa height on month-to-month time scales. ENSO variability projects onto this mode on interannual time scales, but is not by itself a good predictor of Antarctic temperature anomalies. The third temperature mode explains winter warming trends, which may be caused by blocking events, over a large region of the East Antarctic plateau. These results help to place recent climate changes in the context of Antarctica’s background climate variability and will aid in the interpretation of ice core paleoclimate records. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
David P. Schneider Eric J. Steig Josefino C. Comiso |
spellingShingle |
David P. Schneider Eric J. Steig Josefino C. Comiso q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
author_facet |
David P. Schneider Eric J. Steig Josefino C. Comiso |
author_sort |
David P. Schneider |
title |
q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
title_short |
q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
title_full |
q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
title_fullStr |
q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
title_full_unstemmed |
q 2004 American Meteorological Society Recent Climate Variability in Antarctica from Satellite-Derived Temperature Data |
title_sort |
q 2004 american meteorological society recent climate variability in antarctica from satellite-derived temperature data |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.2136 http://depts.washington.edu/isolab/papers/Schneideretal.pdf |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
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http://depts.washington.edu/isolab/papers/Schneideretal.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.581.2136 http://depts.washington.edu/isolab/papers/Schneideretal.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766037667244408832 |