Atmospheric summer teleconnections and Greenland Ice Sheet surface mass variations: insights from MERRA-2 ...

The relationship between leading atmospheric teleconnection patterns and Greenland Ice Sheet (GrIS) temperature, precipitation, and surface mass balance (SMB) are investigated for the last 36 summers (1979–2014) based on Modern-Era Retrospective analysis for Research and Applications version 2 reana...

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Bibliographic Details
Main Authors: Lim, Young-Kwon, Schubert, Siegfried D., Nowicki, Sophie M. J., Lee, Jae N., Molod, Andrea M., Cullather, Richard I., Zhao, Bin, Velicogna, Isabella
Format: Article in Journal/Newspaper
Language:unknown
Published: IOP 2016
Subjects:
Arctic
Greenland
Merra
Ice Sheet
North Atlantic
North Atlantic oscillation
Online Access:https://dx.doi.org/10.13016/m272v9-utmw
https://mdsoar.org/handle/11603/28607
Description
Summary:The relationship between leading atmospheric teleconnection patterns and Greenland Ice Sheet (GrIS) temperature, precipitation, and surface mass balance (SMB) are investigated for the last 36 summers (1979–2014) based on Modern-Era Retrospective analysis for Research and Applications version 2 reanalyses. The results indicate that the negative phase of both the North Atlantic Oscillation (NAO) and Arctic Oscillation, associated with warm and dry conditions for the GrIS, lead to SMB decreases within 0–1 months. Furthermore, the positive phase of the East Atlantic (EA) pattern often lags the negative NAO, reflecting a dynamical linkage between these modes that acts to further enhance the warm and dry conditions over the GrIS, leading to a favorable environment for enhanced surface mass loss. The development of a strong negative NAO in combination with a strong positive EA in recent years leads to significantly larger GrIS warming compared to when the negative NAO occurs in combination with a negative or weak ...

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