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Accelerated mass loss from Greenland ice sheet: Links to atmospheric circulation in the North Atlantic

Cited 12 time in scopus
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Title
Accelerated mass loss from Greenland ice sheet: Links to atmospheric circulation in the North Atlantic
Other Titles
그린랜드 빙상의 가속화된 질량 감소: 북대서양 대기순환과의 관계
Authors
Seo, Ki-Weon
Michiel R. van den Broeke
Jan H. van Angelen
Kim, Baek-Min
Ted Scambos
Baijun Tian
Duane E. Waliser
Lee, Choon-Ki
Subject
Physical Geography; Geology
Keywords
Greenland ice mass loss acceleration; North Atlantic oscillation; Surface mass balance
Issue Date
2015
Citation
Seo, Ki-Weon, et al. 2015. "Accelerated mass loss from Greenland ice sheet: Links to atmospheric circulation in the North Atlantic". GLOBAL AND PLANETARY CHANGE, 128(1): 61-71.
Abstract
Understanding the mechanisms that drive the mass imbalance of the Greenland ice sheet (GrIS) is critical to the accurate projection of its contribution to future sea level rise. Greenland's ice mass loss has been accelerating recently. Using satellite Earth-gravity and regional climate model data, we show that the acceleration rate of Greenland ice mass loss from 2003 to 2012 is ?13.9 ± 2.0 Gt/yr2, which results mainly from an increase of meltwater runoff (?6.3 ± 1.1 Gt/yr2) and a decrease of precipitation (?4.8 ± 1.1 Gt/yr2). Before the extreme surfacemelting in the summers of 2010 and 2012, the decrease of precipitation (?9.7±2.5 Gt/yr2)was a larger contributor to the ice mass loss acceleration than the increase of runoff (?2.1 ± 2.2 Gt/yr2). Furthermore, we show that the North Atlantic Oscillation (NAO) is linked to the precipitation decrease during summer, and its recent influence to Greenland is anomalously large possibly due to the change in atmospheric circulation in the North Atlantic. These results indicate that inter-annual climate variability is playing a significant role in the recently observed Greenland ice mass loss acceleration, underscoring the difficulty of projecting future sea level rise based on the recent observations of GrIS mass loss.
URI
http://repository.kopri.re.kr/handle/201206/6077
DOI
http://dx.doi.org/10.1016/j.gloplacha.2015.02.006
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