A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic
It is well-known that katabatic winds can be detected as warm signatures in the surface temperature over the slopes of the Antarctic ice sheets. For appropriate synoptic forcing and/or topographic channeling, katabatic surges occur, which result in warm signatures also over adjacent ice shelves. Mod...
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ftmdpi:oai:mdpi.com:/2072-4292/11/13/1539/ 2023-08-20T04:01:54+02:00 A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic Günther Heinemann Lukas Glaw Sascha Willmes agris 2019-06-28 application/pdf https://doi.org/10.3390/rs11131539 EN eng Multidisciplinary Digital Publishing Institute Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs11131539 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 11; Issue 13; Pages: 1539 katabatic winds MODIS ice surface temperatures ice shelves Antarctic Text 2019 ftmdpi https://doi.org/10.3390/rs11131539 2023-07-31T22:23:41Z It is well-known that katabatic winds can be detected as warm signatures in the surface temperature over the slopes of the Antarctic ice sheets. For appropriate synoptic forcing and/or topographic channeling, katabatic surges occur, which result in warm signatures also over adjacent ice shelves. Moderate Resolution Imaging Spectroradiometer (MODIS) ice surface temperature (IST) data are used to detect warm signatures over the Antarctic for the winter periods 2002–2017. In addition, high-resolution (5 km) regional climate model data is used for the years of 2002 to 2016. We present a case study and a climatology of wind-induced IST anomalies for the Ross Ice Shelf and the eastern Weddell Sea. The IST anomaly distributions show maxima around 10–15K for the slopes, but values of more than 25K are also found. Katabatic surges represent a strong climatological signal with a mean warm anomaly of more than 5K on more than 120 days per winter for the Byrd Glacier and the Nimrod Glacier on the Ross Ice Shelf. The mean anomaly for the Brunt Ice Shelf is weaker, and exceeds 5K on about 70 days per winter. Model simulations of the IST are compared to the MODIS IST, and show a very good agreement. The model data show that the near-surface stability is a better measure for the response to the wind than the IST itself. Text Antarc* Antarctic Brunt Ice Shelf Byrd Glacier Ice Shelf Ice Shelves Nimrod Glacier Ross Ice Shelf Weddell Sea MDPI Open Access Publishing Antarctic The Antarctic Weddell Sea Ross Ice Shelf Weddell Byrd Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) Nimrod ENVELOPE(165.750,165.750,-85.417,-85.417) Byrd Glacier ENVELOPE(160.333,160.333,-80.250,-80.250) Nimrod Glacier ENVELOPE(163.000,163.000,-82.350,-82.350) Remote Sensing 11 13 1539 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
katabatic winds MODIS ice surface temperatures ice shelves Antarctic |
spellingShingle |
katabatic winds MODIS ice surface temperatures ice shelves Antarctic Günther Heinemann Lukas Glaw Sascha Willmes A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
topic_facet |
katabatic winds MODIS ice surface temperatures ice shelves Antarctic |
description |
It is well-known that katabatic winds can be detected as warm signatures in the surface temperature over the slopes of the Antarctic ice sheets. For appropriate synoptic forcing and/or topographic channeling, katabatic surges occur, which result in warm signatures also over adjacent ice shelves. Moderate Resolution Imaging Spectroradiometer (MODIS) ice surface temperature (IST) data are used to detect warm signatures over the Antarctic for the winter periods 2002–2017. In addition, high-resolution (5 km) regional climate model data is used for the years of 2002 to 2016. We present a case study and a climatology of wind-induced IST anomalies for the Ross Ice Shelf and the eastern Weddell Sea. The IST anomaly distributions show maxima around 10–15K for the slopes, but values of more than 25K are also found. Katabatic surges represent a strong climatological signal with a mean warm anomaly of more than 5K on more than 120 days per winter for the Byrd Glacier and the Nimrod Glacier on the Ross Ice Shelf. The mean anomaly for the Brunt Ice Shelf is weaker, and exceeds 5K on about 70 days per winter. Model simulations of the IST are compared to the MODIS IST, and show a very good agreement. The model data show that the near-surface stability is a better measure for the response to the wind than the IST itself. |
format |
Text |
author |
Günther Heinemann Lukas Glaw Sascha Willmes |
author_facet |
Günther Heinemann Lukas Glaw Sascha Willmes |
author_sort |
Günther Heinemann |
title |
A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
title_short |
A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
title_full |
A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
title_fullStr |
A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
title_full_unstemmed |
A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic |
title_sort |
satellite-based climatology of wind-induced surface temperature anomalies for the antarctic |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/rs11131539 |
op_coverage |
agris |
long_lat |
ENVELOPE(-22.500,-22.500,-74.750,-74.750) ENVELOPE(165.750,165.750,-85.417,-85.417) ENVELOPE(160.333,160.333,-80.250,-80.250) ENVELOPE(163.000,163.000,-82.350,-82.350) |
geographic |
Antarctic The Antarctic Weddell Sea Ross Ice Shelf Weddell Byrd Brunt Ice Shelf Nimrod Byrd Glacier Nimrod Glacier |
geographic_facet |
Antarctic The Antarctic Weddell Sea Ross Ice Shelf Weddell Byrd Brunt Ice Shelf Nimrod Byrd Glacier Nimrod Glacier |
genre |
Antarc* Antarctic Brunt Ice Shelf Byrd Glacier Ice Shelf Ice Shelves Nimrod Glacier Ross Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Brunt Ice Shelf Byrd Glacier Ice Shelf Ice Shelves Nimrod Glacier Ross Ice Shelf Weddell Sea |
op_source |
Remote Sensing; Volume 11; Issue 13; Pages: 1539 |
op_relation |
Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs11131539 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs11131539 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
13 |
container_start_page |
1539 |
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1774712286551736320 |