North Pole Environmental Observatory Delivers Early Results
North Pole Environmental Observatory Delivers Early Results
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北极环境观测站提供早期结果
DOI：
10.1029/2002eo000259
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
R. Woodgate
中科院分区：
文献类型：
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作者：
J. Morison;K. Aagaard;K. Falkner;K. Hatakeyama;R. E. Moritz;J. Overland;D. Perovich;K. Shimada;M. Steele;T. Takizawa;R. Woodgate
多年来，科学家们一直认为北极可能是全球变化的敏感指标，但在20世纪90年代之前，人们认为那里的条件基本上是静态的。这在过去10年中发生了变化。大气、海洋和陆地都发生了十年尺度的变化[Serreze等人，2000年]。北极地区的地面大气压力呈下降趋势，导致大气极涡顺时针旋转。在20世纪90年代，北冰洋环流呈现出更多的气旋特征，北冰洋的大西洋水温被发现是50年观测以来的最高值[Morison等人，2000年]。北极大部分地区的海冰厚度在1958-1976年和1993-1997年减少了43%[Rothrock等人，1999年]。
Scientists have argued for a number of years that the Arctic may be a sensitive indicator of global change, but prior to the 1990s, conditions there were believed to be largely static. This has changed in the last 10 years. Decadal-scale changes have occurred in the atmosphere, in the ocean, and on land [Serreze et al., 2000]. Surface atmospheric pressure has shown a declining trend over the Arctic, resulting in a clockwise spin-up of the atmospheric polar vortex. In the 1990s, the Arctic Ocean circulation took on a more cyclonic character, and the temperature of Atlantic water in the Arctic Ocean was found to be the highest in 50 years of observation [Morison et al., 2000]. Sea-ice thickness over much of the Arctic decreased 43% in 1958–1976 and 1993–1997 [Rothrock et al., 1999].