The extreme melt across the Greenland ice sheet in 2012
The discovery of the 2012 extreme melt event across almost the entire surface of the Greenland ice sheet is presented. Data from three different satellite sensors – including the Oceansat-2 scatterometer, the Moderate-resolution Imaging Spectroradiometer, and the Special Sensor Microwave Imager/Soun...
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American Geophysical Union
2012
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D85M65NN 2023-05-15T16:24:43+02:00 The extreme melt across the Greenland ice sheet in 2012 Nghiem, S. V. Hall, D. K. Mote, T. L. Tedesco, Marco Albert, M. R. Keegan, K. Shuman, C. A. Neumann, G. DiGirolamo, N. E. 2012 https://doi.org/10.7916/D85M65NN English eng American Geophysical Union https://doi.org/10.7916/D85M65NN Meltwater Climatic geomorphology Earth temperature Climatic changes Geology Geomorphology Meteorology Articles 2012 ftcolumbiauniv https://doi.org/10.7916/D85M65NN 2019-04-04T08:14:19Z The discovery of the 2012 extreme melt event across almost the entire surface of the Greenland ice sheet is presented. Data from three different satellite sensors – including the Oceansat-2 scatterometer, the Moderate-resolution Imaging Spectroradiometer, and the Special Sensor Microwave Imager/Sounder – are combined to obtain composite melt maps, representing the most complete melt conditions detectable across the ice sheet. Satellite observations reveal that melt occurred at or near the surface of the Greenland ice sheet across 98.6% of its entire extent on 12 July 2012, including the usually cold polar areas at high altitudes like Summit in the dry snow facies of the ice sheet. This melt event coincided with an anomalous ridge of warm air that became stagnant over Greenland. As seen in melt occurrences from multiple ice core records at Summit reported in the published literature, such a melt event is rare with the last significant one occurring in 1889 and the next previous one around seven centuries earlier in the Medieval Warm Period. Given its rarity, the 2012 extreme melt across Greenland provides an exceptional opportunity for new studies in broad interdisciplinary geophysical research. Article in Journal/Newspaper Greenland ice core Ice Sheet Columbia University: Academic Commons Greenland |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Meltwater Climatic geomorphology Earth temperature Climatic changes Geology Geomorphology Meteorology |
spellingShingle |
Meltwater Climatic geomorphology Earth temperature Climatic changes Geology Geomorphology Meteorology Nghiem, S. V. Hall, D. K. Mote, T. L. Tedesco, Marco Albert, M. R. Keegan, K. Shuman, C. A. Neumann, G. DiGirolamo, N. E. The extreme melt across the Greenland ice sheet in 2012 |
topic_facet |
Meltwater Climatic geomorphology Earth temperature Climatic changes Geology Geomorphology Meteorology |
description |
The discovery of the 2012 extreme melt event across almost the entire surface of the Greenland ice sheet is presented. Data from three different satellite sensors – including the Oceansat-2 scatterometer, the Moderate-resolution Imaging Spectroradiometer, and the Special Sensor Microwave Imager/Sounder – are combined to obtain composite melt maps, representing the most complete melt conditions detectable across the ice sheet. Satellite observations reveal that melt occurred at or near the surface of the Greenland ice sheet across 98.6% of its entire extent on 12 July 2012, including the usually cold polar areas at high altitudes like Summit in the dry snow facies of the ice sheet. This melt event coincided with an anomalous ridge of warm air that became stagnant over Greenland. As seen in melt occurrences from multiple ice core records at Summit reported in the published literature, such a melt event is rare with the last significant one occurring in 1889 and the next previous one around seven centuries earlier in the Medieval Warm Period. Given its rarity, the 2012 extreme melt across Greenland provides an exceptional opportunity for new studies in broad interdisciplinary geophysical research. |
format |
Article in Journal/Newspaper |
author |
Nghiem, S. V. Hall, D. K. Mote, T. L. Tedesco, Marco Albert, M. R. Keegan, K. Shuman, C. A. Neumann, G. DiGirolamo, N. E. |
author_facet |
Nghiem, S. V. Hall, D. K. Mote, T. L. Tedesco, Marco Albert, M. R. Keegan, K. Shuman, C. A. Neumann, G. DiGirolamo, N. E. |
author_sort |
Nghiem, S. V. |
title |
The extreme melt across the Greenland ice sheet in 2012 |
title_short |
The extreme melt across the Greenland ice sheet in 2012 |
title_full |
The extreme melt across the Greenland ice sheet in 2012 |
title_fullStr |
The extreme melt across the Greenland ice sheet in 2012 |
title_full_unstemmed |
The extreme melt across the Greenland ice sheet in 2012 |
title_sort |
extreme melt across the greenland ice sheet in 2012 |
publisher |
American Geophysical Union |
publishDate |
2012 |
url |
https://doi.org/10.7916/D85M65NN |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_relation |
https://doi.org/10.7916/D85M65NN |
op_doi |
https://doi.org/10.7916/D85M65NN |
_version_ |
1766013270949363712 |