East Asian winter monsoon variability over the last glacial cycle: Insights from a latitudinal sea-surface temperature gradient across the South China Sea
East Asian winter monsoon variability over the last glacial cycle: Insights from a latitudinal sea-surface temperature gradient across the South China Sea
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DOI：
10.1016/j.palaeo.2010.04.005
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
Jun Tian;Enqing Huang;D. Pak
中科院分区：
文献类型：
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作者：
Jun Tian;Enqing Huang;D. Pak
南海南部中国海区高分辨率浮游有孔虫镁钙比海表温度和δ18O记录提供了过去23年来东亚冬季风变化的历史。具体地说，我们发现南北南海的海温梯度可以作为东亚冬季风变化的有用指标。南海南部MD052896和南海北部1145个ODP站的Δ海温记录记录了过去23年来东亚冬季风极大值的几个正异常，包括H1和年轻仙女木事件。Δ海温记录还表明，∼8.5ka以后，相对于冰川消融，东亚冬季风加强，达到末次冰期的水平。南海Δ海温记录与石笋δ18O记录的对比表明，从末次冰期到全新世，东亚夏季风和冬季风都加强了，夏季风和冬季风的强度可能不是反相关的，至少在上一次冰期-间冰期循环中是这样。
High-resolution planktonic foraminifer Mg/Ca sea surface temperature (SST) and δ18O records of IMAGES core MD052896 from the southern South China Sea (SCS) provide a history of East Asian winter monsoon variability over the past 23kyr. Specifically, we find that the latitudinal SST gradient of the north–south SCS shows promise as a useful proxy of East Asian winter monsoon changes. The ΔSST record of core MD052896 from the southern SCS and ODP site 1145 from the northern SCS documents several positive anomalies indicating East Asia winter monsoon maxima during cold periods of the past 23kyr, including the H1 and Younger Dryas events. The ΔSST record also indicates that after ∼8.5ka the East Asian winter monsoon strengthened relative to the deglaciation, reaching levels of the last glacial period. Comparison of the SCS ΔSST record with stalagmite δ18O records suggests that both the East Asian summer and winter monsoons strengthened from the last glacial to the Holocene, and that summer and winter monsoon strength probably are not anti-correlated, at least over the last glacial–interglacial cycle.