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Subject: 地理学::自然地理学
Title: Short-term variability in the dates of the Indian monsoon onset and retreat on the southern and northern slopes of the central Himalayas as determined by precipitation stable isotopes
Author: Yu, WS (Yu, Wusheng)1, 2; Yao, TD (Yao, Tandong)1, 2; Tian, LD (Tian, Lide)1, 2; Ma, YM (Ma, Yaoming)1, 2; Wen, R (Wen, Rong)1; Devkota, LP (Devkota, Lochan P.)3; Wang, WC (Wang, Weicai)1; Qu, DM (Qu, Dongmei)1; Chhetri, TB (Chhetri, Tek B.)3
Corresponding Author: Yu, WS
Source: CLIMATE DYNAMICS
Issued Date: 2016
DOI: 10.1007/s00382-015-2829-1
Volume: 47, Issue:1-2, Pages:159-172
Indexed Type: SCI
Cooperation Status: 国际
DOC Type: Article
English Abstract: This project launched the first study to compare the stable isotopes (delta O-18 and delta D) in daily precipitation at Kathmandu (located on the southern slope of the central Himalayas) and Tingri (located on the northern slope). The results show that low delta O-18 and delta D values of summer precipitation at the two stations were closely related to intense convection of the Indian monsoon. However, summer delta O-18 and delta D values at Tingri were lower than those at Kathmandu, a result of the lift effect of the Himalayas, coupled with convection disturbances and lower temperatures at Tingri. In winter, the relatively high delta O-18 and delta D values at the two stations appears to have resulted from the influence of the westerlies. Compared with those during the summer, the subsidence of the westerlies and northerly winds resulted in relatively high delta O-18 and delta D values of the winter precipitation at Tingri. Winter delta O-18 and delta D values at Kathmandu far exceeded those at Tingri, due to more intense advection of the southern branch of the westerlies, and higher temperatures and relative humidity at Kathmandu. The detailed differences in stable isotopes between the two stations follow short-term variability in the onset date of the Indian monsoon and its retreat across the central Himalayas. During the sampling period, the Indian monsoon onset at Tingri occurred approximately 1 week later than that at Kathmandu. However, the retreat at Tingri began roughly 3 days earlier. Clearly, the duration of the Indian monsoon effects last longer at Kathmandu than that at Tingri. Our findings also indicate that the India monsoon travels slowly northward across the central Himalayas due to the blocking of the Himalayas, but retreats quickly.
Language: 英语
WOS ID: WOS:000381227100011
Citation statistics:
Content Type: 期刊论文
URI: http://ir.itpcas.ac.cn/handle/131C11/7661
Appears in Collections:图书馆_期刊论文

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description.institution: 1.Chinese Acad Sci ITP CAS, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
3.Tribhuvan Univ, Cent Dept Hydrol & Meteorol, Kathmandu, Nepal

Recommended Citation:
Yu, WS ,Yao, TD ,Tian, LD ,et al. Short-term variability in the dates of the Indian monsoon onset and retreat on the southern and northern slopes of the central Himalayas as determined by precipitation stable isotopes[J]. CLIMATE DYNAMICS,2016,47(1-2):159-172.
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