Millennial scale changes in sea surface temperature and ocean circulation in the northeast Pacific, 10–60 kyr BP
Millennial scale changes in sea surface temperature and ocean circulation in the northeast Pacific, 10–60 kyr BP
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东北太平洋海面温度和海洋环流的千年尺度变化，10-60 kyr BP
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Kennett
中科院分区：
文献类型：
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作者：
D. Pak;D. Lea;J. Kennett
[1]加州边缘（ODP站点1017 E）的一个新的百年尺度Mg/Ca温度记录揭示了10至60 kyr之间的大的千年尺度振荡。这一记录表明，冰消期加州边缘的海表温度迅速升高了7.4 ± 0.8°C，在此之前有一个2.6 ± 1.2°C的前博林温度振荡。最后一次冰期的千年尺度事件以加州边缘的3至7°C之间的海面温度振荡为标志，海阶间的变化与地表水盐度的增加有关。这些数据是一致的证据冰川南移的极地急流和随之而来的加强相对寒冷，新鲜的加州电流stadial事件。这些数据也支持以前的假设，即北大西洋和东北太平洋之间的紧密耦合的气候不稳定的最后一次冰期事件的反应。
[1] A new centennial-scale Mg/Ca temperature record from the California margin (ODP Site 1017E) reveals large millennial-scale oscillations between 10 to 60 kyr. This record indicates that sea surface temperature on the California Margin warmed rapidly on the deglacial by 7.4 ± 0.8°C, and was preceded by a pre-Bolling temperature oscillation of 2.6 ± 1.2°C. Millennial-scale events of the last glacial episode were marked by sea surface temperature oscillations of between 3 and 7°C on the California margin, and interstadials were associated with an increase in surface water salinity. The data are consistent with evidence for a glacial southward shift in the polar jet stream and concomitant strengthening of the relatively cold, fresh California Current during stadial events. The data also support previous hypotheses suggesting a tight coupling between the North Atlantic and northeast Pacific response to climate instability of the last glacial episode.