干旱区生态环境知识资源中心(Arid): Role of stable isotopes in revealing moisture sources and rainfall variability in India

Arid

DOI	10.1016/j.dynatmoce.2024.101444
	Role of stable isotopes in revealing moisture sources and rainfall variability in India
	Prasad, Gokul; Chinnasamy, Pennan; Cartwright, Ian
通讯作者	Chinnasamy, P
来源期刊	DYNAMICS OF ATMOSPHERES AND OCEANS
ISSN	0377-0265
EISSN	1872-6879
出版年	2024
卷号	106
英文摘要	Precipitation is a crucial component of the water cycle and is essential for the livelihood of people and ecosystems; therefore, understanding precipitation parameters is vital. Stable isotopes in precipitation can provide important information on precipitation sources, atmospheric circulation patterns, and hydrological processes. In this study, stable isotopes in precipitation for four cities in India were analyzed, namely New Delhi, Hyderabad, Shillong, and Calicut, using data from the International Atomic Energy Agency (IAEA) Global Network for Isotopes in Precipitation (GNIP). The GNIP data were supplemented with in -situ measurements. Results showed the correlations between climate -related factors such as surface air temperature and precipitation levels with the stable isotope composition of precipitation. The relationships critically explore interannual variations in the isotope data over the last three decades. The Local Meteoric Water Line (LMWL) for New Delhi and Hyderabad had intercepts less than 10 parts per thousand, implying a higher evaporation effect over precipitation, consistent with arid and semi -arid regions with increased altitude. The weighted average value of d -excess for southern and Himalayan points were 10.7 and 12.7, respectively, and the average value of delta 18O were - 3.65 and5.84, and delta 2H were - 16.8 and35.8. The d -excess value was significantly lower in the Northern part (New Delhi), with an average weighted value of 6.6. The key values include the isotopic composition of rainfall in different regions of India, the LMWL for different stations, the d -excess value, and the consistency of meteoric water lines with regional and global values. The results of this study provide valuable information on the variability of stable isotopes in precipitation in India. The study's outcomes can be compared with the isotopic composition of surface water and groundwater. This discovery offers more understanding of the isotopic differences that occur on a smaller scale during organized convection and the factors that affect them. As a result, it enhances our ability to decipher the paleoclimate data in arid, semi -arid, and subtropical monsoon regions.
英文关键词	Oxygen-18 Local Meteoric Water Line (LMWL) Stable Isotope Precipitation Indian Summer Monsoon
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001178919300001
WOS关键词	METEORIC WATER LINE ; RIVER WATER ; PRECIPITATION ; GROUNDWATER ; BASIN ; TIME
WOS类目	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403307
推荐引用方式 GB/T 7714	Prasad, Gokul,Chinnasamy, Pennan,Cartwright, Ian. Role of stable isotopes in revealing moisture sources and rainfall variability in India[J],2024,106.
APA	Prasad, Gokul,Chinnasamy, Pennan,&Cartwright, Ian.(2024).Role of stable isotopes in revealing moisture sources and rainfall variability in India.DYNAMICS OF ATMOSPHERES AND OCEANS,106.
MLA	Prasad, Gokul,et al."Role of stable isotopes in revealing moisture sources and rainfall variability in India".DYNAMICS OF ATMOSPHERES AND OCEANS 106(2024).