气候变化领域集成服务门户(CCPortal): Northwestward shift of the northern boundary of the East Asian summer monsoon during the mid-Holocene caused by orbital forcing and vegetation feedbacks

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DOI	10.1016/j.quascirev.2021.107136
	Northwestward shift of the northern boundary of the East Asian summer monsoon during the mid-Holocene caused by orbital forcing and vegetation feedbacks
	Chen, Jie; Zhang, Qiong; Huang, Wei; Lu, Zhengyao; Zhang, Zhiping; Chen, Fahu
通讯作者	Zhang, Q (通讯作者)
发表日期	2021
ISSN	0277-3791
EISSN	1873-457X
卷号	268
英文摘要	The East Asian summer monsoon (EASM) northern boundary is a critical indicator of EASM variations. Movement of the boundary is modulated by both the EASM and the mid-latitude westerlies. Here, we use the Earth system model EC-Earth to quantify the contribution of orbital forcing and vegetation feedbacks in modulating the movement of EASM northern boundary. The results show that the simulated EASM northern boundary during the mid-Holocene shifts by a maximum of similar to 213 km northwestward due to orbital forcing. When the model was coupled with a dynamic vegetation module LPJ-GUESS, the northern boundary shifts further northwestward by a maximum of similar to 90 km, indicating the importance of vegetation feedbacks. During the mid-Holocene, temperature increased in the mid-latitude during the boreal summer due to insolation, leading to increased meridional air temperature differences (MTDs) over the region north of 45 degrees N and to decreased MTDs to the south. The changes in the temperature gradient weakened the East Asian Westly Jet (EAWJ) and displaced it northward, resulting in an earlier transition of the Meiyu stage and a more prolonged Midsummer stage. The northward movement of EAWJ, combined with the enhanced southerly moisture flow from South China, caused more precipitation in North China and eventually to a northwestward shift of the northern boundary of the EASM. The coupled dynamic vegetation module LPJ-GUESS simulated more grassland and less forest over Northeast Asia during the mid-Holocene. The increased surface albedo tended to lower the temperature in the region, and further enhanced the MTDs in mid-latitude East Asia, leading to the further northward movement of the EAWJ and a northwestward shift of the EASM northern boundary. Although the simulated vegetation distribution in several regions may be not accurate, it reflects the substantial contribution of climate-vegetation interaction on modulating the EASM. (C) 2021 The Authors. Published by Elsevier Ltd.
关键词	LAST GLACIAL MAXIMUM WESTERN PACIFIC CLIMATE-CHANGE SEASONAL TRANSITIONS POLLEN RECORD DYNAMIC VEGETATION HOLOCENE OPTIMUM WET CLIMATE CHINA MODEL
英文关键词	East Asian summer monsoon northern boundary; East Asian westerly jet; Mid-Holocene; Orbital forcing; Vegetation feedbacks
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000692518500017
来源期刊	QUATERNARY SCIENCE REVIEWS
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/260354
推荐引用方式 GB/T 7714	Chen, Jie,Zhang, Qiong,Huang, Wei,et al. Northwestward shift of the northern boundary of the East Asian summer monsoon during the mid-Holocene caused by orbital forcing and vegetation feedbacks[J]. 中国科学院青藏高原研究所,2021,268.
APA	Chen, Jie,Zhang, Qiong,Huang, Wei,Lu, Zhengyao,Zhang, Zhiping,&Chen, Fahu.(2021).Northwestward shift of the northern boundary of the East Asian summer monsoon during the mid-Holocene caused by orbital forcing and vegetation feedbacks.QUATERNARY SCIENCE REVIEWS,268.
MLA	Chen, Jie,et al."Northwestward shift of the northern boundary of the East Asian summer monsoon during the mid-Holocene caused by orbital forcing and vegetation feedbacks".QUATERNARY SCIENCE REVIEWS 268(2021).