气候变化领域集成服务门户(CCPortal): Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region

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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, Zhongyin; Tian, Lide
通讯作者	Tian, LD (通讯作者)
发表日期	2016
ISSN	0894-8755
EISSN	1520-0442
起始页码	1339
结束页码	1352
卷号	29 期号:4
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.
关键词	CLOUD-TOP HEIGHT TIBETAN PLATEAU SUMMER MONSOON ICE CORES STABLE-ISOTOPES CLIMATIC CONTROLS SOUTH CHINA DELTA-O-18 ENSO VARIABILITY
英文关键词	Climate variability; Atm/Ocean Structure/ Phenomena; Monsoons; Physical Meteorology and Climatology; Interannual variability; ENSO; Precipitation; Variability; Clouds
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000370451200002
来源期刊	JOURNAL OF CLIMATE
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/258670
推荐引用方式 GB/T 7714	Cai, Zhongyin,Tian, Lide. Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region[J]. 中国科学院青藏高原研究所,2016,29(4).
APA	Cai, Zhongyin,&Tian, Lide.(2016).Atmospheric Controls on Seasonal and Interannual Variations in the Precipitation Isotope in the East Asian Monsoon Region.JOURNAL OF CLIMATE,29(4).
MLA	Cai, Zhongyin,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).