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DOI	10.1016/j.palaeo.2020.109750
	Sources and behavior of monsoon air masses in the lowest-latitude region on the Tibetan Plateau; and their paleoclimatic implications
	Nishimura M.; Matsunaka T.; Wang J.; Matoba S.; Tsushima A.; Zhu L.; Izutsu Y.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	To better understand the reported paleoclimate features and underlying mechanisms in the lowest-latitude region (~28°N to 29°30′N), where 12 major river gorges cross the Himalayas, of the southern Tibetan Plateau, we aim to elucidate the major sources and behavior of modern monsoon air masses in the region based on spatial variations in the δ18O and δ2H of stream water and precipitation, and vegetation during the summer monsoon season. Our main findings were following: The river gorges, high mountain ranges bearing extensive dense vegetation, and stronger solar insolation characteristic of the lowest-latitude region may have functioned for an extended period as the essential geological settings for strongly drawing significant amounts of moisture from the Indian Ocean toward the region without passing through the Yarlung Zangbo basin. The combination of such geological settings specific to this region may have caused its earlier response to the climate amelioration after a cold/dry event, such as the Younger Dryas and Heinrich-1, compared to other regions on the Plateau. Furthermore, gorge-derived monsoon air masses that blew through the lowest-latitude region are highly likely to have more significantly influenced the onset of the climate amelioration after a cold/dry event even in the southwestern, south-central, and southeastern regions, rather than the Yarlung Zangbo-derived monsoon air masses. Therefore, this caused the subsequent expansion of the Indian summer monsoon (ISM) over the Plateau. Thus, with its unique geological setting, the lowest-latitude region has presumably played a critical role as the key region, i.e. the initiator, for the early evolution of the ISM on the Tibetan Plateau by responding to climate amelioration after cold/dry events more rapidly than any other region and drawing gorge-derived monsoon air masses strongly toward the region. © 2020 Elsevier B.V.
英文关键词	Indian Summer Monsoon (ISM); Monsoon evolution; Paleoclimate; River gorges; Water stable isotopes
语种	英语
scopus关键词	air mass; Heinrich event; latitude; monsoon; paleoclimate; precipitation (climatology); seasonal variation; spatial variation; Younger Dryas; Brahmaputra Basin; Himalayas; Indian Ocean; Qinghai-Xizang Plateau
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150438
作者单位	Graduate School of Science and Engineering, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka, 424-0902, Japan; Key Laboratory of Tibetan Environment Changes and Land Surface Processes (TEL)/ Nam Co Observation and Research Station (NAMORS), Institute of Tibetan Plateau Research, Chinese Academy of Science, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Institute of Low Temperature Science, Hokkaido University, N19W8, Sapporo, 060-0819, Japan
推荐引用方式 GB/T 7714	Nishimura M.,Matsunaka T.,Wang J.,et al. Sources and behavior of monsoon air masses in the lowest-latitude region on the Tibetan Plateau; and their paleoclimatic implications[J],2020,554.
APA	Nishimura M..,Matsunaka T..,Wang J..,Matoba S..,Tsushima A..,...&Izutsu Y..(2020).Sources and behavior of monsoon air masses in the lowest-latitude region on the Tibetan Plateau; and their paleoclimatic implications.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Nishimura M.,et al."Sources and behavior of monsoon air masses in the lowest-latitude region on the Tibetan Plateau; and their paleoclimatic implications".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).