Quantitative pollen-based paleoclimate reconstructions for the past 18.5 ka in southwestern Yunnan Province, China

doi:10.1016/j.gloplacha.2023.104288

NIGPAS OpenIR

	Quantitative pollen-based paleoclimate reconstructions for the past 18.5 ka in southwestern Yunnan Province, China
通讯作者	Xiao, Xiayun(xyxiao@niglas.ac.cn)
	Xiao, Xiayun 1; Zhao, Yan 2; Chi, Changting 1,3; Zheng, Zhuo 4; Ma, Chunmei 5; Liang, Chen 2; Mao, Limi6 ; Hillman, Aubrey 7
	2023-11-01
发表期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
卷号	230 页码:19
摘要	Quantitative reconstruction of past climate plays an important role in understanding global and regional climate changes and validating climate models. Although some important progress has been made in quantitative paleoclimate reconstructions based on terrestrial records in the Indian summer monsoon region, high-resolution quantitative studies spanning the last similar to 20 ka are still relatively sparse with differing results. This study presents high-resolution quantitative variations in mean temperature of the coldest month (MTCM, the first controlling factor of the regional vegetation), mean annual temperature (MAT, the second controlling factor), and mean annual precipitation (MAP) from Lake Tengchongqinghai in southwestern China, based on an updated modern pollen dataset and the fossil pollen record spanning the last 18.5 ka. The results show that temperature and precipitation increased gradually from 18.5 ka, and peaked from 7.2 to 4.5 ka when MAT was on average 1.0 degrees C higher than the modern observational value (14.5 degrees C), corresponding to the mid-Holocene thermal maximum (HTM), and then decreased gradually. The total reconstructed ranges are between-2.2 and 9.2 degrees C for MTCM, 7.7 and 17.2 degrees C for MAT, and 840 and 1300 mm for MAP. On top of this overall climate trend, seven abrupt cold and dry events were detected during the periods of 16.2-14.8 ka, 12.8-11.5 ka, similar to 11.1 ka, 9.1-8.4 ka, similar to 7.7 ka, 4.3-3.7 ka, and 0.68-0.009 ka (1270-1950 CE). The results of this quantitative reconstruction were validated by both statistical and ecological evaluations. We conclude that the trend of climatic change since 18.5 ka in this study area was primarily driven by June, July, August, and September solar insolation and changes in radiative forcing and greenhouse gas concentrations. The abrupt changes may be caused by changes in the Atlantic meridional overturning circulation, solar activity, the position of the Intertropical Convergence Zone, and volcanic activity.
关键词	Pollen Quantitative reconstruction Temperature and precipitation Abrupt events Indian summer monsoon Since the last deglaciation Southwestern China
DOI	10.1016/j.gloplacha.2023.104288
收录类别	SCI
语种	英语
关键词[WOS]	NORTH-ATLANTIC CLIMATE ; INDIAN-SUMMER MONSOON ; ALPINE LACUSTRINE RECORD ; EASTERN TIBETAN PLATEAU ; LAST GLACIAL MAXIMUM ; GREENLAND ICE CORE ; ASIAN MONSOON ; HIGH-RESOLUTION ; CALIBRATION-SET ; ABRUPT CHANGES
资助项目	National Key Research and Development Program of China[2016YFA0600501] ; National Natural Science Foundation of China[41877434] ; National Natural Science Foundation of China[42077424] ; National Natural Science Foundation of China[42277446] ; National Natural Science Foundation of China[41877437]
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001110732600001
项目资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China
出版者	ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/42998
专题	中国科学院南京地质古生物研究所
通讯作者	Xiao, Xiayun
作者单位	1.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China 5.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210023, Peoples R China 6.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China 7.SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 USA
推荐引用方式 GB/T 7714	Xiao, Xiayun,Zhao, Yan,Chi, Changting,et al. Quantitative pollen-based paleoclimate reconstructions for the past 18.5 ka in southwestern Yunnan Province, China[J]. GLOBAL AND PLANETARY CHANGE,2023,230:19.
APA	Xiao, Xiayun.,Zhao, Yan.,Chi, Changting.,Zheng, Zhuo.,Ma, Chunmei.,...&Hillman, Aubrey.(2023).Quantitative pollen-based paleoclimate reconstructions for the past 18.5 ka in southwestern Yunnan Province, China.GLOBAL AND PLANETARY CHANGE,230,19.
MLA	Xiao, Xiayun,et al."Quantitative pollen-based paleoclimate reconstructions for the past 18.5 ka in southwestern Yunnan Province, China".GLOBAL AND PLANETARY CHANGE 230(2023):19.