Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027644 |
Stable isotope composition of Cyclone Mekunu rainfall, Southern Oman | |
Thomas Mü; ller; Jan Friesen; Stephan M. Weise; Omar Al Abri; Ali Bakhit Ali Bait Said; Nils Michelsen | |
2020-10-20 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Cyclone Mekunu hit the southern Arabian Peninsula in late May 2018 and brought rainfall amounts that accounted for up to six times the mean annual precipitation. Coming from the Arabian Sea, a quite underdocumented region with regard to cyclones, the storm eye crossed the Omani coast approx. 80 km east of the border to Yemen. Using automatic samplers, rainfall samples were collected during the event at three locations along a transect almost parallel to the storm track. The stable isotope analyses show a wide range of δ values, with minimum and maximum values of ‐17.01 and ‐1.77 ‰ δ18O and ‐122.2 and ‐1.6 ‰ δ2H. On average, rainfall becomes isotopically lighter with elevation, but rather irregularly. In view of high wind speeds probably precluding a gradual rain‐out of ascending air masses, a “pseudo elevation effect” seems likely. Our measurements expand the known δ value range of local cyclones by about 6 ‰ for δ18O and by nearly 50 ‰ for δ2H. The isotopic composition of the annual Indian Summer Monsoon shows values of ‐0.93 to 2.21 ‰ δ18O and ‐2.1 to 23.7 ‰ δ2H. Thus, there is a clear difference in the dual isotope signatures of the two precipitation systems in the area. Our findings enable an assessment of the impact of cyclones on the hydro (geo)logical system. For the arid Najd area, we demonstrate that the isotopic signatures of groundwater samples fall between those of cyclone and (paleo)monsoon precipitation, suggesting that several rainfall types may have contributed to replenishment. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/300228 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Thomas Mü,ller,Jan Friesen,et al. Stable isotope composition of Cyclone Mekunu rainfall, Southern Oman[J]. Water Resources Research,2020. |
APA | Thomas Mü.,ller.,Jan Friesen.,Stephan M. Weise.,Omar Al Abri.,...&Nils Michelsen.(2020).Stable isotope composition of Cyclone Mekunu rainfall, Southern Oman.Water Resources Research. |
MLA | Thomas Mü,et al."Stable isotope composition of Cyclone Mekunu rainfall, Southern Oman".Water Resources Research (2020). |
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