Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean

ZHU Da-yong; ZHAO Jin-ping; SHI Jiu-xin

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ZHU Da-yong, ZHAO Jin-ping, SHI Jiu-xin. Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean[J]. Haiyang Xuebao, 2007, 29(2): 25-33.

Citation:

ZHU Da-yong, ZHAO Jin-ping, SHI Jiu-xin. Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean[J]. Haiyang Xuebao, 2007, 29(2): 25-33.

ZHU Da-yong, ZHAO Jin-ping, SHI Jiu-xin. Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean[J]. Haiyang Xuebao, 2007, 29(2): 25-33.

Citation:

ZHU Da-yong, ZHAO Jin-ping, SHI Jiu-xin. Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean[J]. Haiyang Xuebao, 2007, 29(2): 25-33.

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Study on the multi-year variations of sea ice cover of Chukchi Sea in Arctic Ocean

1.
Department of Oceanography, Xiamen University, Xiamen 361005, China;Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266003, China

Received Date: 2006-05-02
Rev Recd Date: 2007-01-05

Abstract

Abstract

The Arctic climate is experiencing obvious change,and the variations in the area and thickness of seaice are the uppermost charact eristics.The ice cover in the Chukchi Sea represents mostly the variation of Arcitc seaice cover.In this paper,the variations of ice area within nine years in the Chukchi Sea are studied by using the remote sensing seaice data.The results show that the annual difference of sea ice area is not able in different year.During the years of 1997~2005,the ice area underwent a course from lightice year(1997) to heavy ice year(2000~2001) and then reg ressed light ice years(2002~2005).As a whole,the ice area presents a decr easing trend,and the ice condition was the lightest in the year 2005.The duration of ice melting correlated well with the ice condition.In the lightice year,the melting begins earlier and freezes-up later.The minimum sea ice cover appear in the late Septem ber to early October each year,whose areas are quite different,4% in the light ice years and more than 50% in the heavyice years.Some major indices,Sea Ice Area Index,Minimum Sea Ice Area,Accumulated Temperature Anomaly and two Wind Driven Indices are chosen to express the multi-year variations of the sea ice cover and the impact from local climate.The Accumulated Temperature during winter has obvious impact on the ice condition of the coming year.Local wind field is a key fact to change the ice cover in short time by causing the compression or extension of low concentr ationice in summertime.
- Arctic,
- Chukchi Sea,
- seaice area,
- multi-year variation,
- remote sensing

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