Connections of Yenisei River discharge to sea surface temperatures, sea ice, and atmospheric circulation

被引:5
|
作者
Ye, HC [1 ]
Yang, DQ
Zhang, XB
Zhang, TJ
机构
[1] Calif State Univ Los Angeles, Dept Geog & Urban Anal, Los Angeles, CA 90032 USA
[2] Univ Alaska, Water & Environm Res Ctr, Fairbanks, AK 99775 USA
[3] Meterol Serv Canada, Climate Res Branch, Downsview, ON M3H 5T4, Canada
[4] Univ Colorado, Natl Snow & Ice Data Ctr, Boulder, CO 80303 USA
关键词
river discharge; sea ice; Arctic Ocean; Siberia;
D O I
10.1029/2003JD003759
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
This study examines the connections of Yenisei River discharge to sea surface temperatures (SSTs), atmospheric circulation, and Arctic sea ice coverage using historical records for the time period of 1936-1995. We found that Yenisei River discharge is negatively associated with SSTs over the northern North Atlantic and is positively correlated with SSTs over the tropical South Atlantic and Indian Oceans. This connection is bridged by atmospheric circulation anomalies over the North Atlantic (a pattern similar to the North Atlantic Oscillation) and central Siberia. Sea ice coverage over the eastern Arctic Ocean, specifically over the eastern Siberian Sea, the Kara Sea, and the Greenland Sea, is negatively associated with Yenisei River discharge one season after the annual discharge; the abnormal ice coverage extent persists throughout the year until the next winter season. The persistent negative relationships between discharge and regional sea ice may be a result of the combined effects of the thermal and dynamic contribution of fresh water to sea ice and persistent atmospheric circulation anomalies coupled with sea ice cover over the Arctic Ocean.
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页数:12
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