气候变化领域集成服务门户(CCPortal): Decoupled early Holocene summer temperature and monsoon precipitation in southwest China

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DOI	10.1016/j.quascirev.2018.05.038
	Decoupled early Holocene summer temperature and monsoon precipitation in southwest China
	Wu, Duo; Chen, Xuemei; Lv, Feiya; Brenner, Mark; Curtis, Jason; Zhou, Aifeng; Chen, Jianhui; Abbott, Mark; Yu, Junqing; Chen, Fahu
通讯作者	Chen, FH (通讯作者)
发表日期	2018
ISSN	0277-3791
EISSN	1873-457X
起始页码	54
结束页码	67
卷号	193
英文摘要	Proxy-based reconstructions of Holocene temperature show that both the timing and magnitude of the thermal maximum varied substantially across different regions. Given the 'Holocene temperature conundrum', it is becoming increasingly important to reconstruct seasonal temperature variations. As a major component of the global monsoon system, the Indian summer monsoon (ISM) transports moisture and heat from the tropical oceans to higher latitudes and thus it has substantial socioeconomic implications for its regions of influences. We developed a well-dated, pollen-based summer temperature record (mean July; MJT) for the last 14,000 years from Xingyun lake in southwest China, where the climate is dominated by the ISM. MJT decreased during the Younger Dryas, increased slowly to high values during 8000-5500 yr BP, and decreased thereafter. The MJT record differs from that inferred using carbonate oxygen isotopes (delta O-18) from the same sediment core. The latter record reflects variations in monsoon precipitation, with highest precipitation during the early Holocene (11,000-6500 yr BP). We propose that summer temperature and precipitation in southwest China were decoupled during the early Holocene. Both MJT and monsoon precipitation decreased after the middle Holocene, tracking the trend in boreal summer insolation. We suggest that greater cloud cover, associated with high precipitation and generated by a strong summer monsoon, may have depressed early Holocene temperatures that would otherwise be driven by greater summer insolation. Melting ice sheets in high-latitude regions and high concentrations of atmospheric aerosols during the early Holocene may also have contributed, in part, to the relatively cool summer temperatures. (C) 2018 Elsevier Ltd. All rights reserved.
关键词	INDIAN MONSOON VEGETATION HISTORY YUNNAN PROVINCE XINGYUN LAKE TIBETAN PLATEAU LACUSTRINE CARBONATES AIR-TEMPERATURE ABRUPT CHANGES ASIAN MONSOON EAST-ASIA
英文关键词	Indian summer monsoon; Mean July temperature; Xingyun Lake; Early Holocene; Decoupled variation
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000439674100004
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/259313
推荐引用方式 GB/T 7714	Wu, Duo,Chen, Xuemei,Lv, Feiya,et al. Decoupled early Holocene summer temperature and monsoon precipitation in southwest China[J]. 中国科学院青藏高原研究所,2018,193.
APA	Wu, Duo.,Chen, Xuemei.,Lv, Feiya.,Brenner, Mark.,Curtis, Jason.,...&Chen, Fahu.(2018).Decoupled early Holocene summer temperature and monsoon precipitation in southwest China.QUATERNARY SCIENCE REVIEWS,193.
MLA	Wu, Duo,et al."Decoupled early Holocene summer temperature and monsoon precipitation in southwest China".QUATERNARY SCIENCE REVIEWS 193(2018).