Impacts of extremely asymmetrical polar ice sheets on the East Asian summer monsoon during the MIS-13 interglacial
Impacts of extremely asymmetrical polar ice sheets on the East Asian summer monsoon during the MIS-13 interglacial
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MIS-13间冰期极不对称极地冰盖对东亚夏季风的影响
DOI：
10.1016/j.quascirev.2020.106164
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发表时间：
2019-04
影响因子：
4
通讯作者：
Guo Zhengtang
中科院分区：
文献类型：
--
作者：
Shi Feng;Yin Qiuzhen;Nikolova Irina;Berger André;Ramstein Gilles;Guo Zhengtang
根据底栖δ 18 O和南极冰芯记录，海洋同位素阶段（MIS）13（距今约500 ka）是一个相对较弱的间冰期。然而，来自北方的替代记录表明，MIS-13至少与最近的间冰期一样温暖，甚至比最近的间冰期更温暖，夏季季风非常强烈，格陵兰冰盖可能融化。在这项研究中，假设一个不对称的半球气候，我们调查了东亚夏季风的各种格陵兰岛和南极冰盖的大小，使用一组敏感性实验与HadCM 3模式，通过因子分离分析。结果表明，在没有格陵兰冰盖和南极冰盖的情况下，东亚季风区夏季风降水增加了1.7%，与中国代用重建的变化方向一致。这种增强与更强的海陆热力对比、更多的水汽输送到东亚以及热带辐合带的北移有关。格陵兰冰盖的去除的反应是有关的热力学和地形的影响，东亚季风通过地形引起的波列。对南极冰盖扩大的反应包括南大洋环极深水的强烈上涌，融化海冰，导致SST变暖。这种变暖向北传播，影响东亚夏季风。
Marine Isotope Stage (MIS) 13 (∼500 ka ago) was a relatively weak interglacial according to the benthic δ18O and Antarctic ice core records. However, proxy records from the Northern Hemisphere indicate that MIS-13 was at least as warm as or even warmer than more recent interglacials, with an extremely strong summer monsoon and possible melting of the Greenland ice sheet. In this study, assuming an asymmetric hemispheric climate, we investigate the response of the East Asian summer monsoon to various Greenland and Antarctic ice sheet sizes using a set of sensitivity experiments with the HadCM3 model through factor separation analysis. Results show that with no Greenland ice sheet and a large Antarctic ice sheet there is an enhancement of summer monsoon precipitation in the East Asian monsoon region of up to ∼7%, in agreement with the direction of change from proxy reconstructions for China. This enhancement is associated with a stronger land–sea thermal contrast, more water vapor transport to East Asia and a northward shift of the Intertropical Convergence Zone. The response to the Greenland ice sheet removal is related to thermodynamic and topographical effects that influence the East Asian monsoon through an orographically induced wave train. The response to the larger Antarctic ice sheet involves stronger upwelling of circumpolar deep water in the Southern Ocean melts the sea ice, leading to a warmer SST. This warming propagates to the North, affecting the East Asian summer monsoon.
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影响因子：
4.3
作者：
M. Ziegler;L. Lourens;E. Tuenter;G. Reichart
通讯作者：
M. Ziegler;L. Lourens;E. Tuenter;G. Reichart
近500年中国5-9月降水场的多代理重建
影响因子：
4.3
作者：
Shi Feng;Zhao Sen;Guo Zhengtang;Goosse Hugues;Yin Qiuzhen
通讯作者：
Yin Qiuzhen
影响因子：
56.9
作者：
BERGER, A;LOUTRE, MF;LASKAR, J
通讯作者：
LASKAR, J
影响因子：
4.6
作者：
M. Karami;M. Karami;N. Herold;N. Herold;A. Berger;Q. Yin;H. Muri;H. Muri
通讯作者：
M. Karami;M. Karami;N. Herold;N. Herold;A. Berger;Q. Yin;H. Muri;H. Muri
影响因子：
3.1
作者：
P. Hildebrand;Bernice Ackerman
通讯作者：
P. Hildebrand;Bernice Ackerman