A Transient Modeling Study of the Latitude Dependence of East Asian Winter Monsoon Variations on Orbital Timescales

doi:10.1029/2019GL083060

IEECAS OpenIR > 现代环境研究室

	A Transient Modeling Study of the Latitude Dependence of East Asian Winter Monsoon Variations on Orbital Timescales
	Xie, Xiaoxun 1,2; Liu, Xiaodong 1,2,3; Chen, Guangshan 1,4; Korty, Robert L.5
通讯作者	Xie, Xiaoxun(liuxd@loess.llqg.ac.cn)
	2019-07-16
发表期刊	GEOPHYSICAL RESEARCH LETTERS
ISSN	0094-8276
卷号	46 期号:13 页码:7565-7573
摘要	Transient simulations for the last 300,000 years are conducted to identify how orbital insolation, greenhouse gases, and ice sheets affect variations of the East Asia winter monsoon (EAWM). Results show that the southern EAWM's dominant period is 23 kyr in response to variations in boreal winter insolation (primarily from precession), while the northern EAWM's dominant period is 100 kyr and is most strongly modulated by Northern Hemisphere ice sheets, displaying a significant latitude dependence in orbital-scale EAWM variations. The precession-modulated boreal winter insolation can control the southern EAWM by influencing zonal land-sea thermal contrast at low latitudes, while Northern Hemisphere ice sheets during glacial periods can strengthen the northern EAWM by forcing a powerful cyclonic circulation anomaly over northern Pacific. The different responses of southern and northern EAWM to orbital insolation and ice-sheet forcings can further lead to in phase or out phase variations between the southern and northern EAWM. Plain Language Summary The East Asia winter monsoon (EAWM) has been thought to be stronger during glacial periods and weaker during interglacial periods at orbital timescales; this view highlights the impact of ice sheets at high latitudes on the EAWM but ignores the effects of variable insolation at low latitudes induced by orbital variations. Using long-term climate simulations spanning the last 300,000 years, here we show that variations of the EAWM at orbital scales arise from both and, due to the large meridional extent of the EAWM, exhibit periodicity that varies with latitude. The southern EAWM is mainly controlled by precession-modulated orbital insolation, while the northern EAWM is mainly controlled by Northern Hemisphere ice sheets. Because these two forcings operate on distinct timescales, the joint configurations of orbital insolation and ice-sheet forcings result to in phase or out phase variations between the southern and northern EAWM.
DOI	10.1029/2019GL083060
关键词[WOS]	MILLENNIAL-SCALE ; INTERANNUAL VARIATIONS ; SUMMER MONSOONS ; SOUTHERN MODES ; ICE SHEETS ; NORTHERN ; VARIABILITY ; PRECESSION ; CLIMATE ; SURFACE
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41690115] ; National Natural Science Foundation of China[41572150] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20070103]
WOS研究方向	Geology
项目资助者	National Natural Science Foundation of China ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000476960100057
出版者	AMER GEOPHYSICAL UNION
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13655
专题	现代环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Xie, Xiaoxun
作者单位	1.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Shaanxi, Peoples R China 5.Texas A&M Univ, Dept Atmospher Sci, College Stn, TX USA
推荐引用方式 GB/T 7714	Xie, Xiaoxun,Liu, Xiaodong,Chen, Guangshan,et al. A Transient Modeling Study of the Latitude Dependence of East Asian Winter Monsoon Variations on Orbital Timescales[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(13):7565-7573.
APA	Xie, Xiaoxun,Liu, Xiaodong,Chen, Guangshan,&Korty, Robert L..(2019).A Transient Modeling Study of the Latitude Dependence of East Asian Winter Monsoon Variations on Orbital Timescales.GEOPHYSICAL RESEARCH LETTERS,46(13),7565-7573.
MLA	Xie, Xiaoxun,et al."A Transient Modeling Study of the Latitude Dependence of East Asian Winter Monsoon Variations on Orbital Timescales".GEOPHYSICAL RESEARCH LETTERS 46.13(2019):7565-7573.