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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ftdoajarticles:oai:doaj.org/article:e6baacbd10eb40229f5b5e344c6e86af 2023-05-15T14:00:58+02:00 A Satellite-Based Climatology of Wind-Induced Surface Temperature Anomalies for the Antarctic Günther Heinemann Lukas Glaw Sascha Willmes 2019-06-01T00:00:00Z https://doi.org/10.3390/rs11131539 https://doaj.org/article/e6baacbd10eb40229f5b5e344c6e86af EN eng MDPI AG https://www.mdpi.com/2072-4292/11/13/1539 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs11131539 https://doaj.org/article/e6baacbd10eb40229f5b5e344c6e86af Remote Sensing, Vol 11, Iss 13, p 1539 (2019) katabatic winds MODIS ice surface temperatures ice shelves Antarctic Science Q article 2019 ftdoajarticles https://doi.org/10.3390/rs11131539 2022-12-31T07:31:30Z 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. Article in Journal/Newspaper Antarc* Antarctic Brunt Ice Shelf Byrd Glacier Ice Shelf Ice Shelves Nimrod Glacier Ross Ice Shelf Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) Byrd Byrd Glacier ENVELOPE(160.333,160.333,-80.250,-80.250) Nimrod ENVELOPE(165.750,165.750,-85.417,-85.417) Nimrod Glacier ENVELOPE(163.000,163.000,-82.350,-82.350) Ross Ice Shelf The Antarctic Weddell Weddell Sea Remote Sensing 11 13 1539 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
katabatic winds MODIS ice surface temperatures ice shelves Antarctic Science Q |
spellingShingle |
katabatic winds MODIS ice surface temperatures ice shelves Antarctic Science Q 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 Science Q |
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 |
Article in Journal/Newspaper |
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 |
MDPI AG |
publishDate |
2019 |
url |
https://doi.org/10.3390/rs11131539 https://doaj.org/article/e6baacbd10eb40229f5b5e344c6e86af |
long_lat |
ENVELOPE(-22.500,-22.500,-74.750,-74.750) ENVELOPE(160.333,160.333,-80.250,-80.250) ENVELOPE(165.750,165.750,-85.417,-85.417) ENVELOPE(163.000,163.000,-82.350,-82.350) |
geographic |
Antarctic Brunt Ice Shelf Byrd Byrd Glacier Nimrod Nimrod Glacier Ross Ice Shelf The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Brunt Ice Shelf Byrd Byrd Glacier Nimrod Nimrod Glacier Ross Ice Shelf The Antarctic Weddell Weddell Sea |
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, Vol 11, Iss 13, p 1539 (2019) |
op_relation |
https://www.mdpi.com/2072-4292/11/13/1539 https://doaj.org/toc/2072-4292 2072-4292 doi:10.3390/rs11131539 https://doaj.org/article/e6baacbd10eb40229f5b5e344c6e86af |
op_doi |
https://doi.org/10.3390/rs11131539 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
13 |
container_start_page |
1539 |
_version_ |
1766270369920974848 |