DOI: 10.5194/tc-9-1933-2015
Scopus记录号: 2-s2.0-84943763321
论文题名: Photopolarimetric retrievals of snow properties
作者: Ottaviani M ; , Van Diedenhoven B ; , Cairns B
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 5 起始页码: 1933
结束页码: 1942
语种: 英语
英文关键词: aerosol property
; airborne survey
; algorithm
; asymmetry
; cloud
; data set
; reflectivity
; remote sensing
; scattering
; snow
英文摘要: Polarimetric observations of snow surfaces, obtained in the 410-2264 nm range with the Research Scanning Polarimeter onboard the NASA ER-2 high-altitude aircraft, are analyzed and presented. These novel measurements are of interest to the remote sensing community because the overwhelming brightness of snow plagues aerosol and cloud retrievals based on airborne and spaceborne total reflection measurements. The spectral signatures of the polarized reflectance of snow are therefore worthwhile investigating in order to provide guidance for the adaptation of algorithms currently employed for the retrieval of aerosol properties over soil and vegetated surfaces. At the same time, the increased information content of polarimetric measurements allows for a meaningful characterization of the snow medium. In our case, the grains are modeled as hexagonal prisms of variable aspect ratios and microscale roughness, yielding retrievals of the grains' scattering asymmetry parameter, shape and size. The results agree with our previous findings based on a more limited data set, with the majority of retrievals leading to moderately rough crystals of extreme aspect ratios, for each scene corresponding to a single value of the asymmetry parameter. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75240
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: NASA, Goddard Institute for Space Studies, 2880 Broadway, New York, NY, United States; Center for Climate System Research, Columbia University, New York, NY, United States
Recommended Citation:
Ottaviani M,, Van Diedenhoven B,, Cairns B. Photopolarimetric retrievals of snow properties[J]. Cryosphere,2015-01-01,9(5)