Atmospheric river impacts on Greenland ice sheet surface mass balance
Greenland Ice Sheet (GrIS) mass loss has accelerated since the turn of the twenty-first century. Several recent episodes of rapid GrIS ablation coincided with intense moisture transport over Greenland by atmospheric rivers (ARs), suggesting that these events influence the evolution of GrIS surface m...
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ftvliz:oai:oma.vliz.be:338143 2023-05-15T16:26:06+02:00 Atmospheric river impacts on Greenland ice sheet surface mass balance Mattingly, K.S. Mote, T.L. Fettweis, X. 2018 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=338143 en eng info:eu-repo/semantics/altIdentifier/wos/000445331900010 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=338143 info:eu-repo/semantics/restrictedAccess %3Ci%3EJGR%3A+Atmospheres+123%2816%29%3C%2Fi%3E%3A+8538-8560.+%3Ca+href%3D%22https%3A%2F%2Fhdl.handle.net%2F10.1029%2F2018JD028714%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fhdl.handle.net%2F10.1029%2F2018JD028714%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftvliz 2022-05-01T11:56:04Z Greenland Ice Sheet (GrIS) mass loss has accelerated since the turn of the twenty-first century. Several recent episodes of rapid GrIS ablation coincided with intense moisture transport over Greenland by atmospheric rivers (ARs), suggesting that these events influence the evolution of GrIS surface mass balance (SMB). ARs likely provide melt energy through several physical mechanisms, and conversely, may increase SMB through enhanced snow accumulation. In this study, we compile a long-term (1980–2016) record of moisture transport events using a conventional AR identification algorithm as well as a self-organizing map classification applied to MERRA-2 data. We then analyze AR effects on the GrIS using melt data from passive microwave satellite observations and regional climate model output. Results show that anomalously strong moisture transport by ARs clearly contributed to increased GrIS mass loss in recent years. AR activity over Greenland was above normal throughout the 2000s and early 2010s, and recent melting seasons with above-average GrIS melt feature positive moisture transport anomalies over Greenland. Analysis of individual AR impacts shows a pronounced increase in GrIS surface melt after strong AR events. AR effects on SMB are more complex, as strong summer ARs cause sharp SMB losses in the ablation zone that exceed moderate SMB gains induced by ARs in the accumulation zone during summer and in all areas during other seasons. Our results demonstrate the influence of the strongest ARs in controlling GrIS SMB, and we conclude that projections of future GrIS SMB should accurately capture these rare ephemeral events. Article in Journal/Newspaper Greenland Ice Sheet Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Greenland Merra ENVELOPE(12.615,12.615,65.816,65.816) |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
Greenland Ice Sheet (GrIS) mass loss has accelerated since the turn of the twenty-first century. Several recent episodes of rapid GrIS ablation coincided with intense moisture transport over Greenland by atmospheric rivers (ARs), suggesting that these events influence the evolution of GrIS surface mass balance (SMB). ARs likely provide melt energy through several physical mechanisms, and conversely, may increase SMB through enhanced snow accumulation. In this study, we compile a long-term (1980–2016) record of moisture transport events using a conventional AR identification algorithm as well as a self-organizing map classification applied to MERRA-2 data. We then analyze AR effects on the GrIS using melt data from passive microwave satellite observations and regional climate model output. Results show that anomalously strong moisture transport by ARs clearly contributed to increased GrIS mass loss in recent years. AR activity over Greenland was above normal throughout the 2000s and early 2010s, and recent melting seasons with above-average GrIS melt feature positive moisture transport anomalies over Greenland. Analysis of individual AR impacts shows a pronounced increase in GrIS surface melt after strong AR events. AR effects on SMB are more complex, as strong summer ARs cause sharp SMB losses in the ablation zone that exceed moderate SMB gains induced by ARs in the accumulation zone during summer and in all areas during other seasons. Our results demonstrate the influence of the strongest ARs in controlling GrIS SMB, and we conclude that projections of future GrIS SMB should accurately capture these rare ephemeral events. |
format |
Article in Journal/Newspaper |
author |
Mattingly, K.S. Mote, T.L. Fettweis, X. |
spellingShingle |
Mattingly, K.S. Mote, T.L. Fettweis, X. Atmospheric river impacts on Greenland ice sheet surface mass balance |
author_facet |
Mattingly, K.S. Mote, T.L. Fettweis, X. |
author_sort |
Mattingly, K.S. |
title |
Atmospheric river impacts on Greenland ice sheet surface mass balance |
title_short |
Atmospheric river impacts on Greenland ice sheet surface mass balance |
title_full |
Atmospheric river impacts on Greenland ice sheet surface mass balance |
title_fullStr |
Atmospheric river impacts on Greenland ice sheet surface mass balance |
title_full_unstemmed |
Atmospheric river impacts on Greenland ice sheet surface mass balance |
title_sort |
atmospheric river impacts on greenland ice sheet surface mass balance |
publishDate |
2018 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=338143 |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Greenland Merra |
geographic_facet |
Greenland Merra |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
%3Ci%3EJGR%3A+Atmospheres+123%2816%29%3C%2Fi%3E%3A+8538-8560.+%3Ca+href%3D%22https%3A%2F%2Fhdl.handle.net%2F10.1029%2F2018JD028714%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fhdl.handle.net%2F10.1029%2F2018JD028714%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000445331900010 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=338143 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766014967057743872 |