Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region

doi:10.1175/JCLI-D-15-0363.1

	Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region
	Cai, ZY (Cai, Zhongyin)2,3; Tian, LD (Tian, Lide)1,2; Tian, LD
刊名	JOURNAL OF CLIMATE
	2016
卷号	29 期号:4 页码:1339-1352
关键词	Cloud-top Height Summer Monsoon Tibetan Plateau Ice Cores Stable-isotopes Southern Oscillation Climatic Controls Delta-o-18 Ocean Enso
DOI	10.1175/JCLI-D-15-0363.1
文献子类	Article
英文摘要	Understanding variations in isotopic composition of precipitation from monsoon regions is crucial for its utilization in paleoclimate studies. This study explores the relationship between precipitation delta O-18 data for the East Asian monsoon (EAM) region archived in Global Network for Isotopes in Precipitation (GNIP) and the cloud data archived in ISCCP and their linkage with large-scale atmospheric circulation patterns. Results show that precipitation delta O-18 are significantly and positively correlated with cloud-top pressure (CTP) on both local and regional scales. Mechanically speaking, the stronger the monsoon convection precipitation, the higher the cloud and the lower the condensation temperature and thus the lower the precipitation delta O-18. This result implies that the sharp drop in precipitation delta O-18 in the early summer in monsoonal Asia is related to the atmospheric circulation pattern rather than the different moisture sources, as was previously assumed. This result helps explain the processes leading to the observed "amount effect." A comparison of atmospheric circulation patterns with precipitation delta O-18 on an interannual scale shows that the positive CTP anomalies in the central Indo-Pacific within the weak Walker circulation (El Nino) can be associated with positive delta O-18 anomalies, while negative CTP anomalies in the central Indo-Pacific within the strong Walker circulation (La Nina) can be linked to negative delta O-18 anomalies. This result further confirms the aforementioned conclusion. This is important for understanding paleoclimatic change in monsoonal Asia, as interannual variations in stable isotopes in that region have received less attention in the past.
学科主题	自然地理学
语种	英语
WOS记录号	WOS:000370451200002
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/7763]
专题	青藏高原研究所_图书馆
通讯作者	Tian, LD
作者单位	1.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Bldg 3,Courtyard 16,Lin Cui Rd, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Cai, ZY ,Tian, LD ,Tian, LD. Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region[J]. JOURNAL OF CLIMATE,2016,29(4):1339-1352.
APA	Cai, ZY ,Tian, LD ,&Tian, LD.(2016).Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region.JOURNAL OF CLIMATE,29(4),1339-1352.
MLA	Cai, ZY ,et al."Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region".JOURNAL OF CLIMATE 29.4(2016):1339-1352.