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DOI	10.1016/j.atmosres.2019.01.025
	Stable isotope (δ 18 O and δD) dynamics of precipitation in a high altitude Himalayan cold desert and its surroundings in Indus river basin; Ladakh
	Lone S.A.; Jeelani G.; Deshpande R.D.; Mukherjee A.
发表日期	2019
ISSN	0169-8095
起始页码	46
结束页码	57
卷号	221
英文摘要	Water resources in the northwestern Himalayas are influenced by the circulation of two dominant weather systems: westerlies and southwest monsoons. The effect of climate change has significantly influenced the overall behaviour of these precipitation bearing climate systems and therefore, the meteorology of the region. To investigate the source, transportation, admixture of vapor sources and post-precipitation modification of stable water isotopic composition (δ 18 O and δD) of precipitation in the high altitude Himalayan cold desert of Ladakh, upper Indus river basin (IRB) an observational network was established. Monthly composite (n = 110) and event wise precipitation samples (n = 32) were collected during the year 2015–16 for stable water isotopes (δ 18 O and δD). The stable water isotopic values of the precipitation samples were lower at higher altitude and in January. The monthly δ 18 O (and δD) of precipitation showed a negative correlation with altitude (R 2 = 0.93, p =.001) and temperature (R 2 = 0.71 p =.007). However, it was perceived that the stable water isotopic value of precipitation abruptly drops at all the precipitation sites in August, without considerable variation in the ambient temperature and precipitation amount signifying the alteration in moisture source. The NCEP/NCAR reanalysis and back trajectory modeling also corroborates and suggests the modification in the moisture source and reversal of wind pattern during this period. The less d-excess and lower slope (7.4) of local meteoric waterline than the global, regional and local meteoric water lines of western Himalayan, central Himalayas and Kashmir Himalayas indicate the secondary evaporation of falling raindrops below the cloud base. Lagrangian moisture diagnostic was used to recognize the sources, which endorsed the quantitative distinction of different evaporative moisture sources. © 2019
英文关键词	Himalayas; Indian summer monsoons; Indus basin; Precipitation; Stable isotopes
语种	英语
scopus关键词	Atmospheric thermodynamics; Climate change; Isotopes; Moisture; Precipitation (chemical); Water piping systems; Water resources; Watersheds; Back-trajectory models; Himalayas; Indian summer monsoon; Indus basin; Isotopic composition; Precipitation samples; Stable isotopes; Stable water isotopes; Precipitation (meteorology); atmospheric dynamics; isotopic composition; monsoon; precipitation assessment; seasonal variation; stable isotope; Himalayas; Indus Basin
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/162153
作者单位	Department of Earth Sciences, University of Kashmir, Srinagar, 190006, India; Geoscience Division, Physical Research Laboratory (PRL), Ahmadabad, 380009, India; Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, WB 721302, India
推荐引用方式 GB/T 7714	Lone S.A.,Jeelani G.,Deshpande R.D.,et al. Stable isotope (δ 18 O and δD) dynamics of precipitation in a high altitude Himalayan cold desert and its surroundings in Indus river basin; Ladakh[J],2019,221.
APA	Lone S.A.,Jeelani G.,Deshpande R.D.,&Mukherjee A..(2019).Stable isotope (δ 18 O and δD) dynamics of precipitation in a high altitude Himalayan cold desert and its surroundings in Indus river basin; Ladakh.Atmospheric Research,221.
MLA	Lone S.A.,et al."Stable isotope (δ 18 O and δD) dynamics of precipitation in a high altitude Himalayan cold desert and its surroundings in Indus river basin; Ladakh".Atmospheric Research 221(2019).