DOI: 10.1002/2014GL061216
论文题名: Sensitivity of modeled far-IR radiation budgets in polar continents to treatments of snow surface and ice cloud radiative properties
作者: Chen X. ; Huang X. ; Flanner M.G.
刊名: Geophysical Research Letters
ISSN: 0094-9779
EISSN: 1944-9510
出版年: 2014
卷: 41, 期: 18 起始页码: 6530
结束页码: 6537
语种: 英语
英文关键词: far-IR radiation
; GCM
; polar climate
; scattering
; surface emissivity
Scopus关键词: Budget control
; Clouds
; Electromagnetic wave emission
; Heat radiation
; Ice
; Refractive index
; Scattering
; Snow
; GCM
; General circulation model
; Long-wave radiation
; polar climate
; Radiative properties
; Radiative transfer calculations
; Sensitivity studies
; Surface emissivity
; Surface scattering
; emissivity
; general circulation model
; infrared radiation
; longwave radiation
; particulate matter
; polar region
; refraction
; sensitivity analysis
; spectral analysis
; Antarctic Plateau
; Antarctica
; East Antarctica
英文摘要: While most general circulation models assume spectrally independent surface emissivity and nonscattering clouds in their longwave radiation treatment, spectral variation of the index of refraction of ice indicates that in the far IR, snow surface emissivity can vary considerably and ice clouds can cause nonnegligible scattering. These effects are more important for high-elevation polar continents where the dry and cold atmosphere is not opaque in the far IR. We carry out sensitivity studies to show that in a winter month over the Antarctic Plateau including snow surface spectral emissivity and ice cloud scattering in radiative transfer calculation reduces net upward far-IR flux at both top of atmosphere and surface. The magnitudes of such reductions in monthly mean all-sky far-IR flux range from 0.72 to 1.47 Wm-2, with comparable contributions from the cloud scattering and the surface spectral emissivity. The reduction is also sensitive to sizes of both snow grains and cloud particles. Key Points Ice cloud and snow surface radiative properties vary considerably in the far IRSnow surface emissivity and cloud scattering affect far IR comparablyEven for far-IR radiation alone, the impact is nonnegligible ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911433885&doi=10.1002%2f2014GL061216&partnerID=40&md5=50e8223e9311e4e18752965345c72130
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7043
Appears in Collections: 气候减缓与适应
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作者单位: Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, MI, United States
Recommended Citation:
Chen X.,Huang X.,Flanner M.G.. Sensitivity of modeled far-IR radiation budgets in polar continents to treatments of snow surface and ice cloud radiative properties[J]. Geophysical Research Letters,2014-01-01,41(18).