Antarctic timing of surface water changes off Chile and Patagonian ice sheet response
Antarctic timing of surface water changes off Chile and Patagonian ice sheet response
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DOI：
10.1126/science.1097863
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发表时间：
2004-06-25
期刊：
影响因子：
56.9
通讯作者：
Stoner, J
中科院分区：
文献类型：
--
作者：
Lamy, F;Kaiser, J;Stoner, J
智利大陆边缘的海洋沉积物用于推断自末次冰期以来东南太平洋表层海水性质和巴塔哥尼亚冰盖范围的千年尺度变化。我们的数据显示了海面温度变化的明显“南极”时间，这似乎与海冰的经向位移、西风和环极流系统系统地相关。冰盖变化的代理数据显示出与近海海洋变化类似的模式，但揭示了长达约 1000 年的可变冰川响应时间，这可能解释了南美洲南部陆地记录中当前的一些差异。
Marine sediments from the Chilean continental margin are used to infer millennial-scale changes in southeast Pacific surface ocean water properties and Patagonian ice sheet extent since the last glacial period. Our data show a clear "Antarctic" timing of sea surface temperature changes, which appear systematically linked to meridional displacements in sea ice, westerly winds, and the circumpolar current system. Proxy data for ice sheet changes show a similar pattern as oceanographic variations offshore, but reveal a variable glacier-response time of up to similar to1000 years, which may explain some of the current discrepancies among terrestrial records in southern South America.