globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017MS000970
Scopus记录号: 2-s2.0-85029001695
论文题名:
Differences in the hydrological cycle and sensitivity between multiscale modeling frameworks with and without a higher-order turbulence closure
作者: Xu K; -M; , Li Z; , Cheng A; , Blossey P; N; , Stan C
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:5
起始页码: 2120
结束页码: 2137
语种: 英语
英文关键词: Climate models ; Turbulence ; Anthropogenic warming ; Different treatments ; Energetic constraint ; Hydrological sensitivity ; Multi-scale Modeling ; Precipitation change ; Tropospheric moisture ; Turbulence closures ; Precipitation (meteorology) ; anthropogenic effect ; atmospheric moisture ; Bowen ratio ; climate modeling ; cloud ; energy flux ; global climate ; hydrological cycle ; precipitation (climatology) ; sensitivity analysis ; troposphere ; turbulence
英文摘要: Current conventional global climate models (GCMs) produce a weak increase in global-mean precipitation with anthropogenic warming in comparison with the lower tropospheric moisture increases. The motive of this study is to understand the differences in the hydrological sensitivity between two multiscale modeling frameworks (MMFs) that arise from the different treatments of turbulence and low clouds in order to aid to the understanding of the model spread among conventional GCMs. We compare the hydrological sensitivity and its energetic constraint from MMFs with (SPCAM-IPHOC) or without (SPCAM) an advanced higher-order turbulence closure. SPCAM-IPHOC simulates higher global hydrological sensitivity for the slow response but lower sensitivity for the fast response than SPCAM. Their differences are comparable to the spreads of conventional GCMs. The higher sensitivity in SPCAM-IPHOC is associated with the higher ratio of the changes in latent heating to those in net atmospheric radiative cooling, which is further related to a stronger decrease in the Bowen ratio with warming than in SPCAM. The higher sensitivity of cloud radiative cooling resulting from the lack of low clouds in SPCAM is another major factor in contributing to the lower precipitation sensitivity. The two MMFs differ greatly in the hydrological sensitivity over the tropical lands, where the simulated sensitivity of surface sensible heat fluxes to surface warming and CO2 increase in SPCAM-IPHOC is weaker than in SPCAM. The difference in divergences of dry static energy flux simulated by the two MMFs also contributes to the difference in land precipitation sensitivity between the two models. © 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/75732
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: Climate Science Branch, NASA Langley Research Center, Hampton, VA, United States; NASA Postdoctoral Program, University Space Research Association, Hampton, VA, United States; Environmental Modeling Center, NOAA Center for Weather and Climate Prediction, College Park, MD, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA, United States

Recommended Citation:
Xu K,-M,, Li Z,et al. Differences in the hydrological cycle and sensitivity between multiscale modeling frameworks with and without a higher-order turbulence closure[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(5)
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