DOI: 10.5194/hess-19-4293-2015
Scopus记录号: 2-s2.0-84945907703
论文题名: Effects of changes in moisture source and the upstream rainout on stable isotopes in precipitation -a case study in Nanjing, eastern China
作者: Tang Y ; , Pang H ; , Zhang W ; , Li Y ; , Wu S ; , Hou S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 10 起始页码: 4293
结束页码: 4306
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Location
; Moisture
; Annual precipitation
; Intertropical convergence zone
; Isotopic variations
; Location shifts
; Moisture sources
; Monsoonal precipitation
; Stable isotopic compositions
; Summer precipitation
; Isotopes
; diurnal variation
; intertropical convergence zone
; isotopic composition
; moisture content
; precipitation (climatology)
; seasonality
; spatiotemporal analysis
; speleothem
; stable isotope
; temperature effect
; China
; Jiangsu
; Nanjing [Jiangsu]
英文摘要: In the Asian monsoon region, variations in the stable isotopic composition of speleothems have often been attributed to the "amount effect". However, an increasing number of studies suggest that the "amount effect" in local precipitation is insignificant or even non-existent. To explore this issue further, we examined the variability of daily stable isotopic composition (δ18O) in precipitation from September 2011 to November 2014 in Nanjing, eastern China. We found that intra-seasonal variations of δ18O during summer were not significantly correlated with local rainfall amount but could be linked to changes in the moisture source location and rainout processes in the source regions. Our findings suggest that the stable isotopes in summer precipitation could signal the location shift of precipitation source regions in the inter-tropical convergence zone (ITCZ) over the course of the monsoon season. As a result, changes in moisture source location and upstream rainout effect should be taken into account when interpreting the stable isotopic composition of speleothems in the Asian monsoon region. In addition, the temperature effect on isotopic variations in non-monsoonal precipitation should also be considered because precipitation in the non-monsoon season accounts for about half of its annual precipitation. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78403
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Coast and Island Development, Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, China; Collaborative Innovation Center of Climate Change, Jiangsu Province, China; Geology Department, University of DaytonOH, United States
Recommended Citation:
Tang Y,, Pang H,, Zhang W,et al. Effects of changes in moisture source and the upstream rainout on stable isotopes in precipitation -a case study in Nanjing, eastern China[J]. Hydrology and Earth System Sciences,2015-01-01,19(10)