气候变化领域集成服务门户(CCPortal): Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh

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DOI	10.1016/j.atmosres.2020.105224
	Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh
	Islam, Mohammad Rubaiat; Gao, Jing; Ahmed, Nasir; Karim, Mohammad Masud; Bhuiyan, Abdul Quaiyum; Ahsan, Ariful; Ahmed, Shamsuddin
通讯作者	Gao, J (通讯作者)
发表日期	2021
ISSN	0169-8095
EISSN	1873-2895
卷号	247
英文摘要	Indian summer monsoon (ISM) driven moisture from the Indian Ocean is important for moisture transport to the Asian Water Towers and causing floods and droughts in Bangladesh. Stable isotopic compositions of precipitation (delta O-18 and delta D) are crucial tracers of ISM moisture transport processes. Here we presented spatiotemporal variations of stable isotopes in precipitation at three stations over Bangladesh in 2017-2018 to evaluate the influence of ISM on infra-seasonal variations of stable isotopes in precipitation in the south of Himalaya, combined with local meteorological data, ERAS reanalysis and HYSPLIT model. We found that precipitation delta O-18 displayed the highest values in May following gradual decrease till the lowest in October. The spatial decrease of delta O-18 and delta D from southwest to northeast appeared in pre-monsoon and monsoon seasons together with increasing of d-excess eastwards. The weak temperature effect and amount effect were detected at Satkhira only at the daily scale in specific seasons, and the significantly negative correlations between relative humidity and delta O-18 were almost detected at three stations in both monsoon and non-monsoon seasons. We suggested that convections over Bay of Bengal (BOB) and tropical Indian Ocean and variable contributions of moisture sources are important factors controlling distinct variations of precipitation delta O-18 from west to east Bangladesh. Our results provided a better understanding of the ISM influence on precipitation stable isotopes and variations of the ISM moisture sources, which is crucial to address hydroclimatic interpretations relevant with ISM.
关键词	ASIAN MONSOON PRECIPITATION WATER-VAPOR ATMOSPHERIC CONTROLS MOISTURE SOURCE NEW-DELHI RAINFALL TRENDS BENGAL INDIA VARIABILITY
英文关键词	Indian summer monsoon; Stable isotopes; Convection; Meteorological influence; Moisture sources
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000586020600037
来源期刊	ATMOSPHERIC RESEARCH
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/260277
推荐引用方式 GB/T 7714	Islam, Mohammad Rubaiat,Gao, Jing,Ahmed, Nasir,et al. Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh[J]. 中国科学院青藏高原研究所,2021,247.
APA	Islam, Mohammad Rubaiat.,Gao, Jing.,Ahmed, Nasir.,Karim, Mohammad Masud.,Bhuiyan, Abdul Quaiyum.,...&Ahmed, Shamsuddin.(2021).Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh.ATMOSPHERIC RESEARCH,247.
MLA	Islam, Mohammad Rubaiat,et al."Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh".ATMOSPHERIC RESEARCH 247(2021).