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The distribution and evolution of supraglacial lakes on 79 degrees N Glacier (north-eastern Greenland) and interannual climatic controls

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Title
The distribution and evolution of supraglacial lakes on 79 degrees N Glacier (north-eastern Greenland) and interannual climatic controls
Author(s)
Turton, Jenny, V; Hochreuther, Philipp; Reimann, Nathalie; Manuel T. Blau
Publication Date
2021-08
Journal
CRYOSPHERE, v.15, no.8, pp.3877 - 3896
Publisher
COPERNICUS GESELLSCHAFT MBH
Abstract
The Nioghalvfjerdsfjorden glacier (also known as the 79 degrees North Glacier) drains approximately 8% of the Greenland Ice Sheet. Supraglacial lakes (SGLs), or surface melt ponds, are a persistent summertime feature and are thought to drain rapidly to the base of the glacier and influence seasonal ice velocity. However, seasonal development and spatial distribution of SGLs in the north-east of Greenland are poorly understood, leaving a substantial error in the estimate of meltwater and its impacts on ice velocity. Using results from an automated detection of melt ponds, atmospheric and surface mass balance modelling, and reanalysis products, we investigate the role of specific climatic conditions in melt onset, extent, and duration from 2016 to 2019. The summers of 2016 and 2019 were characterised by above-average air temperatures, particularly in June, as well as a number of rainfall events, which led to extensive melt ponds to elevations up to 1600 m. Conversely, 2018 was particularly cold, with a large accumulated snowpack, which limited the development of lakes to altitudes less than 800 m. There is evidence of inland expansion and increases in the total area of lakes compared to the early 2000s, as projected by future global warming scenarios.
URI
https://pr.ibs.re.kr/handle/8788114/10554
DOI
10.5194/tc-15-3877-2021
ISSN
1994-0416
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > 1. Journal Papers (저널논문)
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