Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures
[1] Persistent melting (e.g., continuing for more than three days or for one consecutive day and night) is mapped in Antarctica (1987–2006) using night- and day-time Special Sensor Microwave Imager brightness temperatures (Tb) at 19.35 GHz, horizontal polarization. Snowmelt is indicated when Tb and...
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ftdatacite:10.7916/d8mp535w 2023-05-15T13:44:13+02:00 Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures Tedesco, Marco Abdalati, W. Zwally, H. J. 2007 https://dx.doi.org/10.7916/d8mp535w https://academiccommons.columbia.edu/doi/10.7916/D8MP535W unknown Columbia University https://dx.doi.org/10.1029/2007gl031199 Meltwater Runoff Ice sheets Climatic geomorphology Geology FOS Earth and related environmental sciences Geomorphology Climatic changes article-journal ScholarlyArticle Text 2007 ftdatacite https://doi.org/10.7916/d8mp535w https://doi.org/10.1029/2007gl031199 2022-03-10T12:27:56Z [1] Persistent melting (e.g., continuing for more than three days or for one consecutive day and night) is mapped in Antarctica (1987–2006) using night- and day-time Special Sensor Microwave Imager brightness temperatures (Tb) at 19.35 GHz, horizontal polarization. Snowmelt is indicated when Tb and relative daily difference exceed threshold values, respectively Tc and ΔT, computed for each pixel and year, or when both daytime and nighttime Tb exceed Tc. Results from an electromagnetic model suggest that the minimum detectable liquid water content ranges between 0.2 and 0.5%, in volume. We find that melting areas have been moving inland since 1987. A first-time extensive melting (1987–2006) is detected over the Transantarctic Mountains on January 2005, 875 Km inland and 2000 m above sea level. Melting extent and index have been decreasing over Antarctica, since 1987, although either positive and negative trends are observed from a sub-continental scale analysis. Text Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) Transantarctic Mountains |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Meltwater Runoff Ice sheets Climatic geomorphology Geology FOS Earth and related environmental sciences Geomorphology Climatic changes |
spellingShingle |
Meltwater Runoff Ice sheets Climatic geomorphology Geology FOS Earth and related environmental sciences Geomorphology Climatic changes Tedesco, Marco Abdalati, W. Zwally, H. J. Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
topic_facet |
Meltwater Runoff Ice sheets Climatic geomorphology Geology FOS Earth and related environmental sciences Geomorphology Climatic changes |
description |
[1] Persistent melting (e.g., continuing for more than three days or for one consecutive day and night) is mapped in Antarctica (1987–2006) using night- and day-time Special Sensor Microwave Imager brightness temperatures (Tb) at 19.35 GHz, horizontal polarization. Snowmelt is indicated when Tb and relative daily difference exceed threshold values, respectively Tc and ΔT, computed for each pixel and year, or when both daytime and nighttime Tb exceed Tc. Results from an electromagnetic model suggest that the minimum detectable liquid water content ranges between 0.2 and 0.5%, in volume. We find that melting areas have been moving inland since 1987. A first-time extensive melting (1987–2006) is detected over the Transantarctic Mountains on January 2005, 875 Km inland and 2000 m above sea level. Melting extent and index have been decreasing over Antarctica, since 1987, although either positive and negative trends are observed from a sub-continental scale analysis. |
format |
Text |
author |
Tedesco, Marco Abdalati, W. Zwally, H. J. |
author_facet |
Tedesco, Marco Abdalati, W. Zwally, H. J. |
author_sort |
Tedesco, Marco |
title |
Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
title_short |
Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
title_full |
Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
title_fullStr |
Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
title_full_unstemmed |
Persistent surface snowmelt over Antarctica (1987–2006) from 19.35 GHz brightness temperatures |
title_sort |
persistent surface snowmelt over antarctica (1987–2006) from 19.35 ghz brightness temperatures |
publisher |
Columbia University |
publishDate |
2007 |
url |
https://dx.doi.org/10.7916/d8mp535w https://academiccommons.columbia.edu/doi/10.7916/D8MP535W |
geographic |
Transantarctic Mountains |
geographic_facet |
Transantarctic Mountains |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://dx.doi.org/10.1029/2007gl031199 |
op_doi |
https://doi.org/10.7916/d8mp535w https://doi.org/10.1029/2007gl031199 |
_version_ |
1766198819759849472 |