globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD027427
Scopus记录号: 2-s2.0-85047731047
论文题名:
The Effect of Monsoon Circulation on the Stable Isotopic Composition of Rainfall
作者: Midhun M.; Lekshmy P.R.; Ramesh R.; Yoshimura K.; Sandeep K.K.; Kumar S.; Sinha R.; Singh A.; Srivastava S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:10
起始页码: 5205
结束页码: 5221
语种: 英语
英文关键词: Indian monsoon ; monsoon circulation ; stable isotope
英文摘要: Understanding the factors that control the variability of oxygen isotopic ratios (δ18O) of Indian Summer Monsoon (ISM) rainfall (δ18Op) is of vital importance for the interpretation of δ18Op derived from climate proxies (e.g., speleothem and tree ring cellulose) of this region. Here we demonstrate the importance of moisture transport pathways on spatiotemporal variations of ISM δ18Op using a new set of daily observations from central and northern India and previously reported data aided by simulations from an isotope-enabled General Circulation Model. 18O-depleted rain events are characterized by a higher number of air parcel back trajectories through the Bay of Bengal branch of moisture transport, while those through the Arabian Sea branch are associated with 18O enriched rain events. This effect is observed on intraseasonal to interannual timescales in the long-term observations at New Delhi as well. Thus, the shift in moisture transport regimes must be considered when interpreting δ 18Op from climate proxies of the ISM region. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113833
Appears in Collections:气候减缓与适应

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作者单位: Geosciences Division, Physical Research Laboratory, Ahmedabad, India; Department of Atmospheric Science, Cochin University of Science and Technology, Kochi, India; School of Earth and Planetary Sciences, National Institute of Science Education and Research, Khordha, India; Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan; Institute of Industrial Science, The University of Tokyo, Komaba, Japan; Centre for Atmospheric Sciences, Indian Institute of Technology, Delhi, India; Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal, India; Department of Earth Sciences, Indian Institute of Technology, Kanpur, India; Department of Geology, Delhi University, New Delhi, India; Indian Institute of Technology (Indian School of Mines), Dhanbad, India

Recommended Citation:
Midhun M.,Lekshmy P.R.,Ramesh R.,et al. The Effect of Monsoon Circulation on the Stable Isotopic Composition of Rainfall[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)
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