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DOI10.1007/s00382-020-05363-7
Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling
Wang, Yongbo; Shen, Ji; Wang, Yong; Liu, Xingqi; Cao, Xianyong; Herzschuh, Ulrike
通讯作者Wang, YB (通讯作者)
发表日期2020
ISSN0930-7575
EISSN1432-0894
起始页码1961
结束页码1977
卷号55期号:7-8
英文摘要The evolution of the Indian Summer Monsoon (ISM) has been widely investigated and traditionally interpreted as consequences of orbital forcing change and the migration of the Intertropical Convergent Zone (ITCZ). The potential influence of sea-surface temperature (SST) on ISM variation at millennial time scales has been progressively proposed in recent studies. Towards a better understanding of Holocene evolution of ISM, especially the potential response to variations in SST, a 643 cm continuous sediment sequence covering the past 11.1 ka was recovered from Beihai Wetland in western Yunnan Plateau. Fossil pollen analysis revealed that evergreen broadleaved forest dominated the regional vegetation in the early Holocene, which represented a warm and humid period associated with strong ISM. Expansions of deciduous broadleaved forest and grassland from 5.2 cal. ka BP to the present, together with the appearance of abundant plant remains, indicate the formation of the wetland system. Ordination analysis of the pollen assemblages further confirmed the abrupt vegetation turnover at ca. 5.2 cal. ka BP, which is consistent with the abrupt decline in reconstructed mean annual precipitation (P-ann, from ca. 1400 to 1100 mm), and indicates an abrupt decline in the summer monsoon. We performed a climate regime shift test on various records from the ISM domain and eastern Africa and found this phenomenon as well, which could not be explained by changes in solar insolation or the migration of the ITCZ. A mid-Holocene cooling was detected from the Indian Ocean, especially a decreased SST in the tropical Indian Ocean ca. 5.5 cal. ka BP. Cooling of the tropical Indian Ocean possibly caused the abrupt retreat of the summer monsoon by restraining the duration of the monsoonal season and the convergent process, which was supported by an abrupt monsoon decline based on results from a minimal concept model.
关键词HOLOCENE VEGETATION HISTORYNORTHWESTERN YUNNAN PROVINCEASIAN MONSOONTIBETAN PLATEAUGLOBAL MONSOONSOUTHWESTERN CHINALACUSTRINE RECORDCLIMATE HISTORYHIGH-RESOLUTIONXINGYUN LAKE
英文关键词Indian Summer Monsoon; Pollen; Holocene; Sea-surface Temperature; Yunnan Plateau
语种英语
WOS研究方向Meteorology & Atmospheric Sciences
WOS类目Meteorology & Atmospheric Sciences
WOS记录号WOS:000548495300004
来源期刊CLIMATE DYNAMICS
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/260040
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GB/T 7714
Wang, Yongbo,Shen, Ji,Wang, Yong,et al. Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling[J]. 中国科学院青藏高原研究所,2020,55(7-8).
APA Wang, Yongbo,Shen, Ji,Wang, Yong,Liu, Xingqi,Cao, Xianyong,&Herzschuh, Ulrike.(2020).Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling.CLIMATE DYNAMICS,55(7-8).
MLA Wang, Yongbo,et al."Abrupt mid-Holocene decline in the Indian Summer Monsoon caused by tropical Indian Ocean cooling".CLIMATE DYNAMICS 55.7-8(2020).
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