Correspondence between the ENSO-like state and glacial-interglacial condition during the past 360 kyr
Correspondence between the ENSO-like state and glacial-interglacial condition during the past 360 kyr
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过去360 kyr类ENSO状态与冰期-间冰期状态的对应关系
DOI：
10.1007/s00343-017-6082-9
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发表时间：
2017
影响因子：
--
通讯作者：
Wang Haixia
中科院分区：
文献类型：
--
作者：
Zhang Shuai;Li Tiegang;Chang Fengming;Yu Zhoufei;Xiong Zhifang;Wang Haixia
在全球气候变暖的背景下，热带太平洋海温（SST）变化对全球气候变化，特别是对厄尔尼诺-南方涛动过程的影响越来越受到人们的关注。在这里，我们提供了新的高分辨率的镁/钙比和有孔虫的氧同位素的替代记录从一个核心的Ontong-Java高原重建SST和水文变化在西太平洋暖池（WPWP）的中心在过去的36万年。与其它Mg/Ca SST和δ 18 O记录相比，在相对稳定的条件下，末次盛冰期（LGM）和其他冰期，热带太平洋将呈现拉尼娜状态，步行者和Hadley旋回将同步增强。相反，在快速变化的时期，热带太平洋可能发生类似厄尔尼诺的情况，例如，间冰期的终止和迅速冷却阶段。根据东太平洋冷舌（EPCT）的敏感性和WPWP的惯性，我们假设WPWP和EPCT之间存在一种相互制约的关系，可以控制SST的纬向梯度变化，从而影响气候变化。
In the warming world, tropical Pacific sea surface temperature (SST) variation has received considerable attention because of its enormous influence on global climate change, particularly the El Niño-Southern Oscillation process. Here, we provide new high-resolution proxy records of the magnesium/calcium ratio and the oxygen isotope in foraminifera from a core on the Ontong-Java Plateau to reconstruct the SST and hydrological variation in the center of the Western Pacific Warm Pool (WPWP) over the last 360 000 years. In comparison with other Mg/Ca-derived SST and δ18O records, the results suggested that in a relatively stable condition, e.g., the last glacial maximum (LGM) and other glacial periods, the tropical Pacific would adopt a La Niña-like state, and the Walker and Hadley cycles would be synchronously enhanced. Conversely, El Niño-like conditions could have occurred in the tropical Pacific during fastchanging periods, e.g., the termination and rapidly cooling stages of interglacial periods. In the light of the sensitivity of the Eastern Pacific Cold Tongue (EPCT) and the inertia of the WPWP, we hypothesize an inter-restricted relationship between the WPWP and EPCT, which could control the zonal gradient variation of SST and affect climate change.