DOI: 10.1007/s00382-017-3798-3
Scopus记录号: 2-s2.0-85023758274
论文题名: Evaluating hydrological influences on mid-latitude δ18Op in the Middle East
作者: Reuter J. ; Buenning N. ; Yoshimura K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-09-10 起始页码: 3153
结束页码: 3170
语种: 英语
英文关键词: Climate modeling
; Hydrology
; Isotope
; Isotope hydrology
; Paleoclimate
; Water cycle
; Water isotopes
Scopus关键词: climate forcing
; climate modeling
; Holocene
; hydrological cycle
; hydrology
; isotopic composition
; midlatitude environment
; oxygen isotope
; paleoclimate
; precipitation (climatology)
; Middle East
英文摘要: The oxygen isotope ratio of precipitation (δ18Op) in the mid-latitudes varies in response to multiple climate influences imposing significant challenges to the interpretation of climate proxies such as the oxygen isotope ratio of lake and speleothem calcite (δ18Oc) that incorporates an isotopic finger print of precipitation. This challenge is particularly acute for pre-historic time periods when climate forcings differed significantly from modern and consequently, internal feedbacks altered the transport of moisture as well as the rate of fractionation that determine the isotopic composition of atmospheric moisture. Here we investigate how δ18Op from the mid-Holocene was influenced by internal feedbacks in the Holocene with an isotope-enabled climate model that simulates the atmospheric response to changing boundary conditions and different climatic forcing. We find that δ18Op during the Mid-Holocene was lower than present day consistent with published proxy records. However, this lower value cannot be simply explained by basic isotope drivers such as precipitation amount or seasonality. Rather, we find that the combination of changes in local surface temperature, precipitation amount, upstream isotopic composition of vapor as well as the season can quantitatively explain the isotopic differences between the mid-Holocene and present day. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109325
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan
Recommended Citation:
Reuter J.,Buenning N.,Yoshimura K.. Evaluating hydrological influences on mid-latitude δ18Op in the Middle East[J]. Climate Dynamics,2018-01-01,50(2018-09-10)