DOI: 10.1002/2015GL065931
论文题名: Origins of climate model discrepancies in atmospheric shortwave absorption and global precipitation changes
作者: Fildier B. ; Collins W.D.
刊名: Geophysical Research Letters
ISSN: 0094-9429
EISSN: 1944-9160
出版年: 2015
卷: 42, 期: 20 起始页码: 8749
结束页码: 8757
语种: 英语
英文关键词: atmospheric shortwave absorption
; general circulation models
; global water cycle
; radiative transfer parameterizations
Scopus关键词: Budget control
; Precipitation (meteorology)
; Radiative transfer
; Spectral resolution
; Water absorption
; Water vapor
; Absorption changes
; General circulation model
; Global precipitation
; Global water cycle
; Mean precipitation
; Model discrepancies
; Primary contribution
; Radiative-convective equilibrium
; Climate models
; absorption
; atmospheric convection
; atmospheric wave
; clear sky
; climate feedback
; climate modeling
; energy budget
; general circulation model
; global climate
; hydrological cycle
; parameterization
; precipitation (climatology)
; radiative transfer
; shortwave radiation
; spatial distribution
; water vapor
英文摘要: Projected increases in mean precipitation are constrained by the atmospheric energy budget through radiative-convective equilibrium. However, significant differences persist between climate models on the rate of increase in precipitation per unit warming, mostly arising from the clear-sky radiative response. While the intermodel spread in clear-sky longwave cooling has been explained by climate feedbacks, the sources of spread in clear-sky shortwave heating are still unclear. This article focuses on the latter. Since water vapor contributes most of the atmospheric shortwave absorption, both intermodel differences in its spatial distribution and in radiative transfer parameterizations are plausible hypotheses for the spread. This work reestablishes the primary contribution from water vapor relative to other shortwave-absorbing species and evaluates the validity of both hypotheses. It is found that the intermodel spread in shortwave absorption change most likely originates from the radiation schemes, possibly because of simplifications induced by their low spectral resolutions. Key Points Water vapor appears as the main cause of intermodel differences in atmospheric shortwave absorption Such discrepancies seem to come from the shortwave radiative transfer formulation for water vapor Errors arising from the coarse spectral resolution in radiation schemes could explain this spread © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946601041&doi=10.1002%2f2015GL065931&partnerID=40&md5=257015a6f676de49864d038116a1e9da
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9044
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Planetary Science, University of California, Berkeley, CA, United States
Recommended Citation:
Fildier B.,Collins W.D.. Origins of climate model discrepancies in atmospheric shortwave absorption and global precipitation changes[J]. Geophysical Research Letters,2015-01-01,42(20).