reference : Has Arctic sea ice loss contributed to increased surface melting of the Greenland Ice Sheet?

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/reference/d191c652-eccd-4936-bf30-cd8c58e45276
Bibliographic fields
reftype Journal Article
Abstract In recent decades, the Greenland ice sheet has experienced increased surface melt. However, the underlying cause of this increased surface melting and how it relates to cryospheric changes across the Arctic remain unclear. Here it is shown that an important contributing factor is the decreasing Arctic sea ice. Reduced summer sea ice favors stronger and more frequent occurrences of blocking-high pressure events over Greenland. Blocking highs enhance the transport of warm, moist air over Greenland, which increases downwelling infrared radiation, contributes to increased extreme heat events, and accounts for the majority of the observed warming trends. These findings are supported by analyses of observations and reanalysis data, as well as by independent atmospheric model simulations using a state-of-the-art atmospheric model that is forced by varying only the sea ice conditions. Reduced sea ice conditions in the model favor more extensive Greenland surface melting. The authors find a positive feedback between the variability in the extent of summer Arctic sea ice and melt area of the summer Greenland ice sheet, which affects the Greenland ice sheet mass balance. This linkage may improve the projections of changes in the global sea level and thermohaline circulation.
Author Jiping Liu; Zhiqiang Chen; Jennifer Francis; Mirong Song; Thomas Mote; Yongyun Hu
DOI 10.1175/JCLI-D-15-0391.1
Issue 9
Journal Journal of Climate
Keywords Variability,Climate variability
Pages 3373-3386
Title Has Arctic sea ice loss contributed to increased surface melting of the Greenland Ice Sheet?
Volume 29
Year 2016
Bibliographic identifiers
.reference_type 0
_record_number 20096
_uuid d191c652-eccd-4936-bf30-cd8c58e45276