干旱区生态环境知识资源中心(Arid): Hydrometeorological processes and evaporation from falling rain in Indian sub-continent: Insights from stable isotopes and meteorological parameters

Arid

DOI	10.1016/j.jhydrol.2020.125601
	Hydrometeorological processes and evaporation from falling rain in Indian sub-continent: Insights from stable isotopes and meteorological parameters
	Oza, Harsh; Ganguly, Akash; Padhya, Virendra; Deshpande, R. D.
通讯作者	Oza, H (corresponding author), Phys Res Lab, Geosci Div, Ahmadabad 380009, Gujarat, India.
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	591
英文摘要	Rigorous analysis of measured isotopic composition (delta O-18 and delta D) of 556 daily rainwater samples collected at four Indian stations viz., Jammu, Jorhat, Hyderabad and Ahmedabad, is done in conjunction with satellite and model derived meteorological and isotopic parameters to discern prominent hydrometeorological processes and factors in four different climatic zones in the Indian subcontinent. A new Indian Meteoric Water Line (IMWL), better representing the different climatic zones, including the semi-arid western India, has been defined: [delta D = (7.6 +/- 0.1) delta O-18 + (8 +/- 1); R-2 = 0.96; P < 0.05; N = 556]. The lower slope of IMWL compared to the Global Meteoric Water Line signifies the role of evaporation from falling rain throughout the Indian subcontinent, though it is surrounded by large marine water body, and bordered by lofty Himalayan mountains in the north obstructing the monsoonal winds. This study provides new quantitative insights about various hydrometeorological processes across the Indian subcontinent. Some of the important inferences drawn from this study are: (i) The estimated evaporative losses from falling raindrops for the four stations are [Jammu: Maximum 52% and Minimum 8%; Jorhat: Max 15% and Min 4%; Ahmedabad Min 8% and Hyderabad Max 29% and Min 15%]. (ii) Increased availability of surface waters due to flood in Brahmaputra River and high value (88%) of column averaged RH results in the lowest evaporative loss from falling raindrops at Jorhat in Northeast. (iii) The high Cloud Liquid Water Content (CLWC) over a longer span of altitude facilitates the interaction of falling raindrop with isotopically depleted ambient vapor and results in isotopically depleted rain. (iv) The observed inverse relationship between the evaporative loss from falling raindrop and the column averaged RH confirms that the post condensation kinetic processes are realistically accounted in this study. (v) Validation with measured isotope data of rain shows that the LMDZ-iso modelled rain fails to incorporate evaporative isotopic enrichment and generates negative bias.
英文关键词	Hydrometeorological processes Rain evaporation Indian subcontinent Stable isotopes Indian Summer Monsoon
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000599757800104
WOS关键词	DEUTERIUM EXCESS ; MONSOON RAINFALL ; WATER ISOTOPES ; PRECIPITATION ; FRACTIONATION ; HYDROGEN ; OXYGEN ; DYNAMICS ; EVENTS ; IMPACT
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369239
作者单位	[Oza, Harsh; Ganguly, Akash; Padhya, Virendra; Deshpande, R. D.] Phys Res Lab, Geosci Div, Ahmadabad 380009, Gujarat, India; [Oza, Harsh] Indian Inst Technol Gandhinagar, Palaj 382355, India
推荐引用方式 GB/T 7714	Oza, Harsh,Ganguly, Akash,Padhya, Virendra,et al. Hydrometeorological processes and evaporation from falling rain in Indian sub-continent: Insights from stable isotopes and meteorological parameters[J],2020,591.
APA	Oza, Harsh,Ganguly, Akash,Padhya, Virendra,&Deshpande, R. D..(2020).Hydrometeorological processes and evaporation from falling rain in Indian sub-continent: Insights from stable isotopes and meteorological parameters.JOURNAL OF HYDROLOGY,591.
MLA	Oza, Harsh,et al."Hydrometeorological processes and evaporation from falling rain in Indian sub-continent: Insights from stable isotopes and meteorological parameters".JOURNAL OF HYDROLOGY 591(2020).