DOI: 10.1002/2016JD024818
论文题名: Modern precipitation δ18O and trajectory analysis over the Himalaya-Tibet Orogen from ECHAM5-wiso simulations
作者: Li J. ; Ehlers T.A. ; Mutz S.G. ; Steger C. ; Paeth H. ; Werner M. ; Poulsen C.J. ; Feng R.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 18 起始页码: 10432
结束页码: 10452
语种: 英语
英文关键词: ECHAM5-wiso
; Himalaya
; precipitation δ18O
; Rayleigh distillation
; Tibet
; trajectory analysis
Scopus关键词: atmospheric general circulation model
; climate change
; climate modeling
; Himalayan orogeny
; monsoon
; oxygen isotope
; precipitation assessment
; spatial variation
; trajectory
; water vapor
; China
; Germany
; Hamburg [Germany]
; Indian Ocean
; Qinghai-Xizang Plateau
英文摘要: Variations in oxygen isotope ratios (δ18O) measured from modern precipitation and geologic archives provide a promising tool for understanding modern and past climate dynamics and tracking elevation changes over geologic time. In areas of extreme topography, such as the Tibetan Plateau, the interpretation of δ18O has proven challenging. This study investigates the climate controls on temporal (daily and 6 h intervals) and spatial variations in present-day precipitation δ18O (δ18Op) across the Tibetan Plateau using a 30 year record produced from the European Centre/Hamburg ECHAM5-wiso global atmospheric general circulation model (GCM). Results indicate spatial and temporal agreement between model-predicted δ18Op and observations. Large daily δ18Op variations of −25 to +5‰ occur over the Tibetan Plateau throughout the 30 simulation years, along with interannual δ18Op variations of ~2‰. Analysis of extreme daily δ18Op indicates that extreme low values coincide with extreme highs in precipitation amount. During the summer, monsoon vapor transport from the north and southwest of the plateau generally corresponds with high δ18Op, whereas vapor transport from the Indian Ocean corresponds with average to low δ18Op. Thus, vapor source variations are one important cause of the spatial-temporal differences in δ18Op. Comparison of GCM and Rayleigh Distillation Model (RDM)-predicted δ18Op indicates a modest agreement for the Himalaya region (averaged over 86°–94°E), confirming application of the simpler RDM approach for estimating δ18Op lapse rates across Himalaya. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62846
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Geosciences, University of Tuebingen, Tuebingen, Germany; Institute of Geography and Geology, University of Wuerzburg, Wuerzburg, Germany; Climate Science Division, Alfred Wegener Institute, Bremerhaven, Germany; Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, United States; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Li J.,Ehlers T.A.,Mutz S.G.,et al. Modern precipitation δ18O and trajectory analysis over the Himalaya-Tibet Orogen from ECHAM5-wiso simulations[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(18)