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Decoupled early Holocene summer temperature and monsoon precipitation in southwest China
Wu, D (Wu, Duo)1; Chen, XM (Chen, Xuemei)2; Lv, FY (Lv, Feiya)1; Brenner, M (Brenner, Mark)3,4; Curtis, J (Curtis, Jason)3,4; Zhou, AF (Zhou, Aifeng)1; Chen, JH (Chen, Jianhui)1; Abbott, M (Abbott, Mark)5; Yu, JQ (Yu, Junqing)6; Chen, FH (Chen, Fahu)1,7
Source PublicationQUATERNARY SCIENCE REVIEWS
2018-08-01
Volume193Issue:0Pages:54-67
DOI10.1016/j.quascirev.2018.05.038
Abstract

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.

Subject Area生态学
WOS IDWOS:000439674100004
Language英语
Indexed BySCIE
KeywordIndian Monsoon Vegetation History Yunnan Province Xingyun Lake Tibetan Plateau Lacustrine Carbonates Air-temperature Abrupt Changes Asian Monsoon East-asia
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
Cooperation Status国际
ISSN0277-3791
Department高寒生态重点实验室
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8582
Collection图书馆
Corresponding AuthorChen, FH (Chen, Fahu)
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China;
2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soils Engn, Lanzhou 730000, Gansu, Peoples R China;
3.Univ Florida, Dept Geol Sci, Gainesville, FL 32611 USA;
4.Univ Florida, Land Use & Environm Change Inst, Gainesville, FL 32611 USA;
5.Univ Pittsburgh, Dept Geol & Environm Sci, Pittsburgh, PA 15260 USA;
6.Chinese Acad Sci, Qinghai Inst Salt Lake Studies, Xining 810008, Qinghai, Peoples R China;
7.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
Recommended Citation
GB/T 7714
Wu, D ,Chen, XM ,Lv, FY ,et al. Decoupled early Holocene summer temperature and monsoon precipitation in southwest China[J]. QUATERNARY SCIENCE REVIEWS,2018,193(0):54-67.
APA Wu, D .,Chen, XM .,Lv, FY .,Brenner, M .,Curtis, J .,...&Chen, FH .(2018).Decoupled early Holocene summer temperature and monsoon precipitation in southwest China.QUATERNARY SCIENCE REVIEWS,193(0),54-67.
MLA Wu, D ,et al."Decoupled early Holocene summer temperature and monsoon precipitation in southwest China".QUATERNARY SCIENCE REVIEWS 193.0(2018):54-67.
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