Preliminary analysis of kinematic characteristics of Arctic sea ice from 1979 to 2012

Zuo Zhengdao; Gao Guoping; Cheng Lingqiao; Xu Feixiang

doi:10.3969/j.issn.0253-4193.2016.05.006

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Zuo Zhengdao, Gao Guoping, Cheng Lingqiao, Xu Feixiang. Preliminary analysis of kinematic characteristics of Arctic sea ice from 1979 to 2012[J]. Haiyang Xuebao, 2016, 38(5): 57-69. doi: 10.3969/j.issn.0253-4193.2016.05.006

Citation:

Zuo Zhengdao, Gao Guoping, Cheng Lingqiao, Xu Feixiang. Preliminary analysis of kinematic characteristics of Arctic sea ice from 1979 to 2012[J]. Haiyang Xuebao, 2016, 38(5): 57-69. doi: 10.3969/j.issn.0253-4193.2016.05.006

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Preliminary analysis of kinematic characteristics of Arctic sea ice from 1979 to 2012

doi: 10.3969/j.issn.0253-4193.2016.05.006

1.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China
2.
College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China

Received Date: 2015-05-15

Abstract

Abstract

Based on sea ice velocity and extent data provided by National Snow and Ice Data Center(NSIDC), kinematic characteristics of the Arctic sea ice from 1979 to 2012 was analyzed, as well as the relationship between sea ice motion and extent. With the high resolution sea surface pressure (SLP) and wind data from European Center for Medium-Range Weather Forecasts(ECMWF) and sea ice velocity data from NSIDC in 2007 and 2012, the effects of surface wind and sea level pressure on Arctic sea ice motion were also investigated. The results showed that the Arctic sea ice motion was accelerating with rate of 2.1%/a in winter and 1.7%/a in summer. In the Beaufort-Chukchi area and the Fram Strait area, the accelerating rates were 2.0%/a and 4.9%/a in winter, 1.6%/a and 2.2%/a in summer, respectively. There was a significant negative correlation between sea ice motion and sea ice extent, with a correlation coefficient was -0.77 from 1979 to 2012. The tendency of wind field in winter and summer was in accord with that of mean sea ice motion with correlation coefficients of 0.50 and 0.48, respectively. The influence of sea surface wind and sea level pressure on sea ice motion, divergence and redistribution was significant. From 234th to 273rd in summer of 2007, high pressure system controlled the Beaufort Sea, leading to southerly wind in Bering Strait and Chukchi Sea. As well as, the stronger Beaufort Gyre made sea ice detained in the central Arctic and the clockwise wind filed drove sea ice aggregate north of Greenland and Canadian Arctic Archipelago. In 2012, both the Bering Strait and the Chukchi Sea were at the junction of the low and high pressure systems, northerly wind during the same period as 2007. Under the joint action of low pressure and high pressure systems, sea ice was transported from the east towards west in the Arctic Ocean. The multiyear sea ice in the Canadian Basin was diverged driven by the offshore movement, and transported towards Chukchi Sea and increased the melting by the Pacific warm inflow.
- Arctic,
- sea ice,
- sea ice motion,
- surface wind,
- sea level pressure

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References(28)

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