气候变化领域集成服务门户(CCPortal): Internal feedbacks forced Middle Holocene cooling on the Qinghai-Tibetan Plateau

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DOI	10.1111/bor.12531
	Internal feedbacks forced Middle Holocene cooling on the Qinghai-Tibetan Plateau
	Wang, Mingda; Hou, Juzhi; Duan, Yanwu; Chen, Jianhui; Li, Xiumei; He, Yue; Lee, Shih-Yu; Chen, Fahu
通讯作者	Hou, JZ (通讯作者)
发表日期	2021
ISSN	0300-9483
EISSN	1502-3885
起始页码	1116
结束页码	1130
卷号	50 期号:4
英文摘要	The nature of Holocene temperature changes is controversial because of the apparent discrepancy between global temperature reconstructions and climate modelling results. Here we present evidence indicating that the discrepancy can be attributed to the combination of seasonal biases in the proxy temperature records and insufficient understanding of the mechanisms within climate models. We obtained independently dated records of mean annual air temperature (MAAT) based on glycerol dialkyl glycerol tetraethers (GDGTs) from Bangong Co in the western Qinghai-Tibetan Plateau (QTP) and two loess-palaeosol sections in the northeastern QTP. One of the most prominent features in the composite MAAT record is the relatively cool Middle Holocene, similar to 2 degrees C cooler than the Early and Late Holocene. The MAAT variations are consistent with orbitally forced modelling results that show increasing regional temperatures since the Middle Holocene, but they contrast with global temperature reconstructions that mainly reflect summer temperature variations. Our findings suggest that changes in boreal summer insolation that led to variations in precipitation patterns and vegetation dynamics were the key factor modulating MAAT during the Holocene. Overall, our study sheds light on possible approaches to solving the Holocene temperature conundrum by considering internal feedbacks within the climate system.
关键词	DIALKYL GLYCEROL TETRAETHERS GDGT-BASED PROXIES ENVIRONMENTAL VARIABLES LIPID DISTRIBUTIONS SUMMER TEMPERATURE GLOBAL TEMPERATURE SURFACE SEDIMENTS MEMBRANE-LIPIDS BRGDGT RESPONSE LAKE-SEDIMENTS
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000659249000001
来源期刊	BOREAS
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/260446
推荐引用方式 GB/T 7714	Wang, Mingda,Hou, Juzhi,Duan, Yanwu,et al. Internal feedbacks forced Middle Holocene cooling on the Qinghai-Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,50(4).
APA	Wang, Mingda.,Hou, Juzhi.,Duan, Yanwu.,Chen, Jianhui.,Li, Xiumei.,...&Chen, Fahu.(2021).Internal feedbacks forced Middle Holocene cooling on the Qinghai-Tibetan Plateau.BOREAS,50(4).
MLA	Wang, Mingda,et al."Internal feedbacks forced Middle Holocene cooling on the Qinghai-Tibetan Plateau".BOREAS 50.4(2021).