Winter storms accelerate the demise of sea ice in the Atlantic sector of the Arctic Ocean

Graham, RM; Itkin, P; Meyer, A; Sundfjord, A; Spreen, G; Smedsrud, LH; Liston, GE; Cheng, B; Cohen, L; Divine, D; Fer, I; Fransson, A; Gerland, S; Haapala, J; Hudson, SR; Johansson, AM; King, J; Merkouriadi, I; Peterson, AK; Provost, C; Randelhoff, A; Rinke, A; Rosel, A; Sennechael, N; Walden, VP; Duarte, P; Assmy, P; Steen, H; Granskog, MA

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Winter storms accelerate the demise of sea ice in the Atlantic sector of the Arctic Ocean

Citation

Graham, RM and Itkin, P and Meyer, A and Sundfjord, A and Spreen, G and Smedsrud, LH and Liston, GE and Cheng, B and Cohen, L and Divine, D and Fer, I and Fransson, A and Gerland, S and Haapala, J and Hudson, SR and Johansson, AM and King, J and Merkouriadi, I and Peterson, AK and Provost, C and Randelhoff, A and Rinke, A and Rosel, A and Sennechael, N and Walden, VP and Duarte, P and Assmy, P and Steen, H and Granskog, MA, Winter storms accelerate the demise of sea ice in the Atlantic sector of the Arctic Ocean, Scientific Reports, 9, (1) Article 9222. ISSN 2045-2322 (2019) [Refereed Article]

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DOI: doi:10.1038/s41598-019-45574-5

Abstract

A large retreat of sea-ice in the ‘stormy’ Atlantic Sector of the Arctic Ocean has become evident through a series of record minima for the winter maximum sea-ice extent since 2015. Results from the Norwegian young sea ICE (N-ICE2015) expedition, a five-month-long (Jan-Jun) drifting ice station in first and second year pack-ice north of Svalbard, showcase how sea-ice in this region is frequently affected by passing winter storms. Here we synthesise the interdisciplinary N-ICE2015 dataset, including independent observations of the atmosphere, snow, sea-ice, ocean, and ecosystem. We build upon recent results and illustrate the different mechanisms through which winter storms impact the coupled Arctic sea-ice system. These short-lived and episodic synoptic-scale events transport pulses of heat and moisture into the Arctic, which temporarily reduce radiative cooling and henceforth ice growth. Cumulative snowfall from each sequential storm deepens the snow pack and insulates the sea-ice, further inhibiting ice growth throughout the remaining winter season. Strong winds fracture the ice cover, enhance ocean-ice-atmosphere heat fluxes, and make the ice more susceptible to lateral melt. In conclusion, the legacy of Arctic winter storms for sea-ice and the ice-associated ecosystem in the Atlantic Sector lasts far beyond their short lifespan.

Item Details

Item Type:	Refereed Article
Keywords:	Arctic, sea ice, storms, winter, ocean, snow, ecosystem, climate change
Research Division:	Earth Sciences
Research Group:	Oceanography
Research Field:	Physical Oceanography
Objective Division:	Environment
Objective Group:	Climate and Climate Change
Objective Field:	Climate Variability (excl. Social Impacts)
UTAS Author:	Meyer, A (Dr Amelie Meyer)
ID Code:	134072
Year Published:	2019
Deposited By:	Oceans and Cryosphere
Deposited On:	2019-07-24
Last Modified:	2019-08-13
Downloads:	0

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