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DOI	10.1016/j.gloplacha.2008.08.003
	Surface-water freshening: A cause for the onset of North Pacific stratification from 2.75 Ma onward?
	Nie, Junsheng; King, John; Liu, Zhengyu; Clemens, Steve; Prell, Warren; Fang, Xiaomin
通讯作者	Nie, JS (通讯作者)
发表日期	2008
ISSN	0921-8181
EISSN	1872-6364
起始页码	49
结束页码	52
卷号	64 期号:1-2
英文摘要	Paleoceanographic data indicate a sudden stratification in the North Pacific Ocean around 2.75 Ma. Understanding the triggering mechanism for this sudden North Pacific stratification is one key to resolving forcing mechanisms for the Northern Hemisphere glaciation around 2.75 Ma, one of the most perplexing problems in paleoclimate research. The trigger for this sudden stratification has not been fully explored. Changes in deep-water or surface-water temperature and/or salinity can cause stratification. Here we re-examine paleoceanography data from the North Pacific Ocean and find evidence that the stratification was preceded by a surface-water salinity decrease between 2.83 and 2.75 Ma. This paleoceanographic result, in combination with recent model simulation results, suggests that fresh water input to the North Pacific via an intensified East Asian summer monsoon and/or an intensified Polar Westerly winter jet stream associated with a phase of accelerated uplift of the northeastern Tibetan Plateau from 4-2.6 Ma might be one important forcing for the onset of North Pacific stratification. Onset of North Pacific stratification around 2.75 Ma is closely related to the intensification of Northern Hemisphere glaciation around the same time via its effects on atmospheric CO2 concentration and sea surface temperature seasonality. Forcing the onset of the North Pacific stratification and Northern Hemisphere glaciation via surface-water freshening has not been emphasized previously. (C) 2008 Elsevier B.V. All rights reserved.
关键词	RESOLUTION MAGNETO STRATIGRAPHY NE TIBETAN PLATEAU HEMISPHERE GLACIATION QINGHAI PROVINCE UPLIFT CLIMATE CHINA OCEAN EVOLUTION SENSITIVITY
英文关键词	North Pacific; ocean stratification; Pliocene; monsoon
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000261635700006
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257610
推荐引用方式 GB/T 7714	Nie, Junsheng,King, John,Liu, Zhengyu,et al. Surface-water freshening: A cause for the onset of North Pacific stratification from 2.75 Ma onward?[J]. 中国科学院青藏高原研究所,2008,64(1-2).
APA	Nie, Junsheng,King, John,Liu, Zhengyu,Clemens, Steve,Prell, Warren,&Fang, Xiaomin.(2008).Surface-water freshening: A cause for the onset of North Pacific stratification from 2.75 Ma onward?.GLOBAL AND PLANETARY CHANGE,64(1-2).
MLA	Nie, Junsheng,et al."Surface-water freshening: A cause for the onset of North Pacific stratification from 2.75 Ma onward?".GLOBAL AND PLANETARY CHANGE 64.1-2(2008).