Anomalous Circulation in July 2019 Resulting in Mass Loss on the Greenland Ice Sheet ...

Current mass loss on the Greenland Ice Sheet (GrIS) includes a significant contribution fromsurface runoff. The circumstances associated with melt events are important for understanding the globalsea level contribution of the GrIS. In late July 2019, surface melt occurred over 62% of the GrIS, inclu...

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Bibliographic Details
Main Authors: Cullather, Richard I., Andrews, Lauren C., Croteau, Michael J., Digirolamo, Nicolo E., Hall, Dorothy K., Lim, Young-Kwon, Loomis, Bryant D., Shuman, Christopher, Nowicki, Sophie M. J.
Format: Article in Journal/Newspaper
Language:English
Published: AGU 2020
Subjects:
Greenland
Ice Sheet
Online Access:https://dx.doi.org/10.13016/m29vx7-q1bo
https://mdsoar.org/handle/11603/24271
Description
Summary:Current mass loss on the Greenland Ice Sheet (GrIS) includes a significant contribution fromsurface runoff. The circumstances associated with melt events are important for understanding the globalsea level contribution of the GrIS. In late July 2019, surface melt occurred over 62% of the GrIS, includingSummit Station. The general circulation leading to the event is found to be dissimilar to 2012 and otherevents documented in the 21st century, with warm air associated with remote atmospheric blocking overwestern Europe eventually transiting west to the GrIS. Gravimetric data indicate that the 2019 summer massloss was 137 Gt more than the 2004–2010 median, or about 92% of the 2012 record. Mass loss during theevent was significant in GrIS northeastern regions in 2019. As compared to 2012, the southwest did not fullyparticipate. Similar circulation patterns have not previously been associated with significant melt. ...

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