Fate of Early 2000s Arctic Warm Water Pulse
Fate of Early 2000s Arctic Warm Water Pulse
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DOI：
10.1175/2010bams2921.1
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发表时间：
2011-05
影响因子：
8
通讯作者：
I. Polyakov;Vladimir A Alexeev;I. Ashik;S. Bacon;A. Beszczynska-Möller;E. Carmack;I. Dmitrenko;
中科院分区：
文献类型：
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作者：
I. Polyakov;Vladimir A Alexeev;I. Ashik;S. Bacon;A. Beszczynska-Möller;E. Carmack;I. Dmitrenko;
北冰洋的水团结构是显著的，因为它的中间（深度范围~ 150-900 m）层充满了来自大西洋的暖水（温度> - 0°C）和咸水（通常称为大西洋水，AW）。这些水被泛北极边界流带进并流经北冰洋，沿盆地边缘呈气旋运动（图1）。这个系统为北冰洋提供了最大的水、热和盐输入；总热量是巨大的，足以融化北极海冰覆盖的几倍。通过利用最近收集的观测数据的2000年代初北极暖水脉冲的广泛档案，本研究提供了北冰洋AW层最近大规模变化的连贯图景。这些最近的观测表明，在20世纪90年代初进入北冰洋的暖风脉冲最终在21世纪初到达加拿大盆地。2000年代中期进入北冰洋的第二个暖脉冲穿过欧亚盆地，正在向下游移动。这些观测最有趣的结果之一是认识到上覆层吸收异常AW热的可能性，这可能对已经减少的北极冰盖产生影响。
The water mass structure of the Arctic Ocean is remarkable, for its intermediate (depth range ~150–900 m) layer is filled with warm (temperature >0°C) and salty water of Atlantic origin (usually called the Atlantic Water, AW). This water is carried into and through the Arctic Ocean by the pan-Arctic boundary current, which moves cyclonically along the basins’ margins (Fig. 1). This system provides the largest input of water, heat, and salt into the Arctic Ocean; the total quantity of heat is substantial, enough to melt the Arctic sea ice cover several times over. By utilizing an extensive archive Fate of Early 2000s Arctic Warm Water Pulse of recently collected observational data, this study provides a cohesive picture of recent large-scale changes in the AW layer of the Arctic Ocean. These recent observations show the warm pulse of AW that entered the Arctic Ocean in the early 1990s finally reached the Canada Basin during the 2000s. The second warm pulse that entered the Arctic Ocean in the mid-2000s has moved through the Eurasian Basin and is en route downstream. One of the most intriguing results of these observations is the realization of the possibility of uptake of anomalous AW heat by overlying layers, with possible implications for an already-reduced Arctic ice cover.