Ocean forcing of glacier retreat in the western Antarctic Peninsula
Ocean forcing of glacier retreat in the western Antarctic Peninsula
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DOI：
10.1126/science.aae0017
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发表时间：
2016-07-15
期刊：
影响因子：
56.9
通讯作者：
Vaughan, D. G.
中科院分区：
文献类型：
--
作者：
Cook, A. J.;Holland, P. R.;Vaughan, D. G.
近几十年来，流经南极半岛（南纬63度至70度）的数百条冰川经历了系统和渐进的变化。这些变化被广泛归因于区域地表气温的快速上升，但现在很明显，这不是唯一的驱动因素。在这里，我们发现中层海洋温度与沿着类似1000公里西部海岸线的冰川锋变化之间存在强烈的对应关系。在南部，终止于温暖的环极深水的冰川经历了相当大的退缩，而那些终止于较冷沃茨的西北部冰川则没有。此外，自20世纪90年代以来，南部的海洋中部变暖与冰川退缩的普遍加速相一致。我们的结论是，海洋引起的融化的变化是该地区冰川退缩的主要原因。
In recent decades, hundreds of glaciers draining the Antarctic Peninsula (63 degrees to 70 degrees S) have undergone systematic and progressive change. These changes are widely attributed to rapid increases in regional surface air temperature, but it is now clear that this cannot be the sole driver. Here, we identify a strong correspondence between mid-depth ocean temperatures and glacier-front changes along the similar to 1000-kilometer western coastline. In the south, glaciers that terminate in warm Circumpolar Deep Water have undergone considerable retreat, whereas those in the far northwest, which terminate in cooler waters, have not. Furthermore, a mid-ocean warming since the 1990s in the south is coincident with widespread acceleration of glacier retreat. We conclude that changes in ocean-induced melting are the primary cause of retreat for glaciers in this region.