气候变化领域集成服务门户(CCPortal): Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh

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DOI	10.1080/10256016.2020.1770245
	Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh
	Ahmed, Nasir; Kurita, Naoyuki; Chowdhury, Md. Abdul Mannan; Gao, Jing; Hassan, S. M. Quamrul; Mannan, Md. Abdul; Mallik, Md. Abul Kalam; Choudhury, Sayeed Ahmed; Bhuiyan, Md. Abdul Quaiyum; Karim, Md. Masud
通讯作者	Ahmed, N (通讯作者)
发表日期	2020
ISSN	1025-6016
EISSN	1477-2639
起始页码	220
结束页码	237
卷号	56 期号:3
英文摘要	The study investigates the factors that control the isotopic composition of tropical precipitation in Bangladesh. Daily and monthly rainfall samples were collected from three stations from 2013 to 2015: (1) northern and moderately high altitude: Sylhet, (2) middle part of the country (close to Tropic of Cancer): Savar, and (3) southern coastal region: Barisal. To escape from the post-evaporation effect, proper care was adopted. This is supported by the fact that the local meteoric water lines (LMWLs) derived for the daily precipitations of all stations mostly follow the global meteoric water line (GMWL). The results exhibit a clear seasonal and spatial variation in both delta O-18 and delta H-2 of precipitation.O-18 is more depleted in samples collected during rainy (monsoon) seasons, while(18)O enrichment is associated to winter and summer (pre-monsoon) seasons. During rainy season, intra-seasonal variability of delta O-18 rainfall is clearly seen and remarkable depletion of(18)O is observed during the period of intense convective activity over the Bay of Bengal. This feature indicates that isotope variability in Bangladesh is controlled by large-scale convective activity rather than local rainfall amount.
关键词	INTRASEASONAL OSCILLATION MONSOON PRECIPITATION DIURNAL-VARIATIONS RAINFALL TRMM VARIABILITY SYSTEMS
英文关键词	Deuterium excess; evaporation; hydrogen-2; intra-seasonal oscillation; isotope hydrology; moisture source; monsoon; outgoing longwave radiation; oxygen-18; precipitation
语种	英语
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
WOS类目	Chemistry, Inorganic & Nuclear ; Environmental Sciences
WOS记录号	WOS:000545144900003
来源期刊	ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
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/259913
推荐引用方式 GB/T 7714	Ahmed, Nasir,Kurita, Naoyuki,Chowdhury, Md. Abdul Mannan,et al. Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh[J]. 中国科学院青藏高原研究所,2020,56(3).
APA	Ahmed, Nasir.,Kurita, Naoyuki.,Chowdhury, Md. Abdul Mannan.,Gao, Jing.,Hassan, S. M. Quamrul.,...&Karim, Md. Masud.(2020).Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,56(3).
MLA	Ahmed, Nasir,et al."Atmospheric factors controlling stable isotope variations in modern precipitation of the tropical region of Bangladesh".ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES 56.3(2020).