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| DOI | 10.1016/j.atmosres.2020.105224 |
| Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh | |
| Islam M.R.; Gao J.; Ahmed N.; Karim M.M.; Bhuiyan A.Q.; Ahsan A.; Ahmed S. | |
| 发表日期 | 2021 |
| ISSN | 0169-8095 |
| 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 of floods and droughts in Bangladesh. Stable isotopic compositions of precipitation (δ18O and δD) 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 intra-seasonal variations of stable isotopes in precipitation in the south of Himalaya, combined with local meteorological data, ERA5 reanalysis and HYSPLIT model. We found that precipitation δ18O displayed the highest values in May following gradual decrease till the lowest in October. The spatial decrease of δ18O and δD from southwest to northeast was 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 δ18O were almost detected at three stations in both monsoon and non-monsoon seasons. We suggested that convections over BOB and tropical Indian Ocean and variable contributions of moisture sources are important factors controlling distinct variations of precipitation δ18O 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. © 2020 The Author(s) |
| 英文关键词 | Convection; Indian summer monsoon; Meteorological influence; Moisture sources; Stable isotopes |
| 语种 | 英语 |
| scopus关键词 | Atmospheric thermodynamics; Meteorology; Moisture; Water towers; Indian summer monsoon; Meteorological data; Moisture sources; Moisture transport; Negative correlation; Spatio-temporal variation; Stable isotopic compositions; Tropical Indian ocean; Isotopes; correlation; hydrometeorology; isotopic composition; precipitation assessment; relative humidity; seasonal variation; spatiotemporal analysis; stable isotope; Bangladesh |
| 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/141749 |
| 作者单位 | Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Dhaka, 1207, Bangladesh; Bangladesh Meteorological Department, Meteorological Complex, Agargaon, Dhaka, 1207, Bangladesh |
| 推荐引用方式 GB/T 7714 | Islam M.R.,Gao J.,Ahmed N.,et al. Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh[J],2021,247. |
| APA | Islam M.R..,Gao J..,Ahmed N..,Karim M.M..,Bhuiyan A.Q..,...&Ahmed S..(2021).Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh.Atmospheric Research,247. |
| MLA | Islam M.R.,et al."Controls on spatiotemporal variations of stable isotopes in precipitation across Bangladesh".Atmospheric Research 247(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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