globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016MS000839
Scopus记录号: 2-s2.0-85018328466
论文题名:
Evaluating hydrological processes in the Community Atmosphere Model Version 5 (CAM5) using stable isotope ratios of water
作者: Nusbaumer J; , Wong T; E; , Bardeen C; , Noone D
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:2
起始页码: 949
结束页码: 977
语种: 英语
英文关键词: Earth (planet) ; Isotopes ; Moisture ; Natural convection ; Atmospheric hydrology ; CAM5 ; Climate reconstruction ; Community atmosphere model ; Deep convection ; Poleward moisture transport ; Stable isotope ratios ; Water isotope ; Climate models ; atmospheric modeling ; climate modeling ; isotopic ratio ; moisture transfer ; paleoclimate ; proxy climate record ; stable isotope ; troposphere ; water vapor
英文摘要: Water isotope-enabled climate and earth system models are able to directly simulate paleoclimate proxy records to aid in climate reconstruction. A less used major advantage is that water isotopologues provide an independent constraint on many atmospheric and hydrologic processes, allowing the model to be developed and tuned in a more physically accurate way. This paper describes the new isotope-enabled CAM5 model, including its isotopic physics routines, and its ability to simulate the modern distribution of water isotopologues in vapor and precipitation. It is found that the model has a negative isotopic bias in precipitation. This bias is partially attributed to model overestimates of deep convection, particularly over the midlatitude oceans during winter. This was determined by examining isotope ratios both in precipitation and vapor, instead of precipitation alone. This enhanced convective activity depletes the isotopic water vapor in the lower troposphere, where the majority of poleward moisture transport occurs, resulting in the insufficient transport of water isotopologue mass poleward and landward. This analysis also demonstrates that large-scale dynamical or moisture source changes can impact isotopologue values as much as local shifts in temperature or precipitation amount. The diagnosis of limitations in the large-scale transport characteristics has major implications if one is using isotope-enabled climate models to examine paleoclimate proxy records, as well as the modern global hydroclimate. © 2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75779
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Department of Atmospheric and Oceanic Sciences and Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States; Now at: NASA Goddard Institute for Space Studies, New York, NY, United States; Now at: Earth and Environmental Systems Institute, Pennsylvania State University, University Park, PA, United States; Department of Applied Mathematics and Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States; Atmospheric Chemistry Observations & Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Now at: College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, United States

Recommended Citation:
Nusbaumer J,, Wong T,E,et al. Evaluating hydrological processes in the Community Atmosphere Model Version 5 (CAM5) using stable isotope ratios of water[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)
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