Low-high latitude interaction forcing on the evolution of the 400 kyr cycle in East Asian winter monsoon records during the last 2.8 Myr

被引:21
作者
Li, Dawei [1 ,2 ,3 ]
Zhao, Meixun [1 ,2 ]
Tian, Jun [4 ]
机构
[1] Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China
[2] Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
[3] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China
[4] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
基金
中国国家自然科学基金;
关键词
East Asian winter monsoon; 400 kyr cyclicity; Super El Nifio-Southern Oscillation; South China Sea; SOUTH CHINA SEA; TETRAETHER MEMBRANE-LIPIDS; WESTERN PACIFIC; MARINE CRENARCHAEOTA; SURFACE TEMPERATURES; AUSTRALIAN MONSOON; AMMONIA OXIDATION; CLIMATE; INSOLATION; ATLANTIC;
D O I
10.1016/j.quascirev.2017.08.005
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Variability of the East Asian winter monsoon (EAWM), stronger during glacials and weaker during interglacials, has been tightly linked to the wax and wane of the Northern Hemisphere ice sheets (NHIS) via the Siberian High over the last 2.8 million years (Myr). However, the long eccentricity cycle (ca. 400 kyr) in the EAWM record from the late Pliocene to early-Pleistocene (2.8-1.2 Ma) could not be linked to NHIS changes, which lacked the long eccentricity cycle in the Pleistocene. Here, we present the first low latitude EAWM record of the last 2.8 Myr using surface and subsurface temperature difference from the northern South China Sea to evaluate interactions between tropical ocean and EAWM changes. The results show that the EAWM variability displayed significant 400 kyr cycle between 2.8 Ma and 1.2 Ma, with weak (strong) EAWM during high (low) earth orbital eccentricity state. A super El Nifio Southern Oscillation (ENSO) proxy record, calculated using west-east equatorial Pacific sea surface temperature differences, revealed 400 kyr cycles throughout the last 2.8 Myr with warm phase during high eccentricity state. Thus, we propose that super ENSO mean state strongly modulated the EAWM strength through remote forcing to generate the 400 kyr cycle between 2.8 Ma and 1.2 Ma, while low NHIS volume was not sufficient to dominate the EAWM variation as it did over the last 0.9 Myr with 100 kyr cycles in dominance. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码:72 / 82
页数:11
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