Temperature difference across the Lomonosov Ridge: Implications for the Atlantic water circulation in the Arctic Ocean

被引:11
作者
Kikuchi, T
Inoue, J
Morison, JH
机构
[1] Japan Agcy Marine Earth Sci & Technol, Inst Observat Res Global Change, Yokosuka, Kanagawa 2370061, Japan
[2] Univ Washington, Appl Phys Lab, Polar Sci Ctr, Seattle, WA 98105 USA
关键词
D O I
10.1029/2005GL023982
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Drifting buoy observations in the Arctic Ocean indicate that, unlike climatological conditions, the temperature of the upper Atlantic water was higher in the Makarov Basin side of the Lomonosov Ridge than in the Amundsen Basin side in 2004. Hydrographic data from 1991 to 2004 has been compared with climatology to examine the relative phase of Atlantic water temperature change in these regions. On the Amundsen Basin side of the Lomonosov Ridge, a positive temperature anomaly in the Atlantic water began in the early 1990s, continued from the mid-1990s to the early 2000s and started decreasing in 2004. In contrast, positive temperature anomalies were first apparent on the Makarov Basin side of the Lomonosov Ridge in 2000, and continue in 2004. Recent historical data indicates that the arrival of temperature anomalies on the Makarov Basin side of the Lomonosov Ridge is delayed about 7 years after arrival on the Amundsen Basin side. Our results support the idea that Atlantic Water circulates cyclonically around the periphery of the Makarov basin at a propagation speed of 1-2 cm s(-1).
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页码:1 / 4
页数:4
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