气候变化领域集成服务门户(CCPortal): Isotopic interaction and source moisture control on the isotopic composition of rainfall over the Bay of Bengal

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DOI	10.1016/j.atmosres.2019.104760
	Isotopic interaction and source moisture control on the isotopic composition of rainfall over the Bay of Bengal
	Sinha N.; Chakraborty S.
发表日期	2020
ISSN	0169-8095
卷号	235
英文摘要	The isotopic interaction between ambient vapor and raindrops has been investigated for the first time at Port Blair, Andaman Islands, an environment having the minimal contribution of the continental moisture. Rainwater and ambient vapor samples were collected on a daily timescale during the Indian summer monsoon season of 2015. Oxygen (Hydrogen) heavy isotopic ratios of rainwater and ambient vapor are positively correlated and a difference in the seasonal average values was found to be 9.5‰ (65.8‰) at ~28 °C. On a daily scale, the oxygen isotope ratios of ambient vapor and rainwater are significantly correlated over a wide range of rainfall amount, but correlation weakens for rainfall exceeding ~36 mm/day. The isotopic variability of rainfall appears to be modulated by the interaction with the ambient vapor, which in turn is determined by the source moisture. In a case study, it is estimated that the vapor-rainwater isotopic exchange could lead to 18O enrichment (depletion) in raindrops (vapor) about 0.41‰ (approx. 30% of the total change), which is far above (>4σ) of the experimental uncertainty. © 2019 Elsevier B.V.
英文关键词	Bay of Bengal; Rain isotopes; Rain-vapor interaction
学科领域	Drops; Moisture control; Oxygen; Rain; Andaman Islands; Bay of Bengal; Experimental uncertainty; Indian summer monsoon; Isotopic composition; Isotopic exchange; Isotopic ratios; Oxygen isotope ratios; Isotopes; isotopic composition; moisture; monsoon; oxygen isotope ratio; raindrop; rainfall; water vapor; Andamans; Andamans and Nicobars; Bay of Bengal; Indian Ocean; Port Blair; South Andaman
语种	英语
scopus关键词	Drops; Moisture control; Oxygen; Rain; Andaman Islands; Bay of Bengal; Experimental uncertainty; Indian summer monsoon; Isotopic composition; Isotopic exchange; Isotopic ratios; Oxygen isotope ratios; Isotopes; isotopic composition; moisture; monsoon; oxygen isotope ratio; raindrop; rainfall; water vapor; Andamans; Andamans and Nicobars; Bay of Bengal; Indian Ocean; Port Blair; South Andaman
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120514
作者单位	Center for Climate Change Center, Indian Institute of Tropical Meteorology, Pashan, Pune, Maharashtra 411008, India; Department of Atmospheric and Space Science, Savitribai Phule Pune University, Pune, Maharashtra 411007, India
推荐引用方式 GB/T 7714	Sinha N.,Chakraborty S.. Isotopic interaction and source moisture control on the isotopic composition of rainfall over the Bay of Bengal[J],2020,235.
APA	Sinha N.,&Chakraborty S..(2020).Isotopic interaction and source moisture control on the isotopic composition of rainfall over the Bay of Bengal.Atmospheric Research,235.
MLA	Sinha N.,et al."Isotopic interaction and source moisture control on the isotopic composition of rainfall over the Bay of Bengal".Atmospheric Research 235(2020).