globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD027915
Scopus记录号: 2-s2.0-85050379405
论文题名:
Tracking the Strength of the Walker Circulation With Stable Isotopes in Water Vapor
作者: Dee S.G.; Nusbaumer J.; Bailey A.; Russell J.M.; Lee J.-E.; Konecky B.; Buenning N.H.; Noone D.C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:14
起始页码: 7254
结束页码: 7270
语种: 英语
英文关键词: climate change ; remote sensing ; tropical circulation ; Walker circulation ; water isotope physics
英文摘要: General circulation models (GCMs) predict that the global hydrological cycle will change in response to anthropogenic warming. However, these predictions remain uncertain, in particular, for precipitation (Intergovernmental Panel on Climate Change, 2013, https://doi.org/10.1017/CBO9781107415324.004). Held and Soden (2006, https://doi.org/10.1175/JCLI3990.1) suggest that as lower tropospheric water vapor concentration increases in a warming climate, the atmospheric circulation and convective mass fluxes will weaken. Unfortunately, this process is difficult to constrain, as convective mass fluxes are poorly observed and incompletely simulated in GCMs. Here we demonstrate that stable hydrogen isotope ratios in tropical atmospheric water vapor can trace changes in temperature, atmospheric circulation, and convective mass flux in a warming world. We evaluate changes in temperature, the distribution of water vapor, vertical velocity (ω), advection, and water isotopes in vapor (δDV). Using water isotope-enabled GCM experiments for modern versus high-CO2 atmospheres, we identify spatial patterns of circulation change over the tropical Pacific. We find that slowing circulation in the tropical Pacific moistens the lower troposphere and weakens convective mass flux, both of which impact the δD of water vapor in the midtroposphere. Our findings constitute a critical demonstration of how water isotope ratios in the tropical Pacific respond to changes in radiative forcing and atmospheric warming. Moreover, as changes in δDV can be observed by satellites, our results develop new metrics for the detection of global warming impacts to the hydrological cycle and, specifically, the strength of the Walker circulation. ©2018. American Geophysical Union. All Rights Reserved.
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被引频次[WOS]:19   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113506
Appears in Collections:气候减缓与适应

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作者单位: Department of Earth, Environmental, and Planetary Sciences, Brown University, Providence, RI, United States; Institute at Brown for Environment and Society, Brown University, Providence, RI, United States; Institute for Geophysics, University of Texas Austin, Austin, TX, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; National Center for Atmospheric Research, Boulder, CO, United States; Department of Earth and Planetary Sciences, Washington University, St. Louis, MO, United States; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvalis, OR, United States

Recommended Citation:
Dee S.G.,Nusbaumer J.,Bailey A.,et al. Tracking the Strength of the Walker Circulation With Stable Isotopes in Water Vapor[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(14)
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