DOI: 10.1002/2017JD027388
Scopus记录号: 2-s2.0-85042180351
论文题名: Improving Remote Sensing of Aerosol Microphysical Properties by Near-Infrared Polarimetric Measurements Over Vegetated Land: Information Content Analysis
作者: Hou W. ; Li Z. ; Wang J. ; Xu X. ; Goloub P. ; Qie L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2215
结束页码: 2243
语种: 英语
英文关键词: aerosol microphysical properties
; degree of freedom for signal
; information content analysis
; near infrared
; polarimetric remote sensing
Scopus关键词: aerosol
; error analysis
; instrumentation
; near infrared
; parameterization
; polarization
; remote sensing
; satellite data
; surface reflectance
; top of atmosphere
; wavelength
英文摘要: While polarimetric measurements contain valuable information regarding aerosol microphysical properties, polarization data in the near-infrared (NIR) bands have not been widely utilized. This paper evaluates whether the aerosol property information contents from single-viewing satellite polarimetric measurements at 1,610 and 2,250 nm can be used to improve the retrieval of aerosol parameters over vegetated land, in combination with shorter-wavelength bands (490, 670, and 870 nm). The a priori information and errors for the analysis are derived by assuming that the surface reflectance at visible wavelengths can be derived from the top of atmosphere at 2,250 nm. The information content in the synthetic data set is investigated for 10 aerosol parameters characterizing the columnar aerosol volumes (V0 f and V0 c) particle size distributions (refff f, vefff f, refff f and vefff f) and refractive indices (mr f, mi f, mr c, mi f) for the fine- and coarse-mode aerosol models, respectively, and one parameter C characterizing the surface polarization. The results indicate that the degrees of freedom for signal can be increased by at least 2 with the addition of NIR measurements and that one to three additional parameters could be further retrieved with significantly decreased uncertainties. In addition, the 1,610 nm band is necessary for the simultaneous retrieval of V0 f, mr f, and reff f for the fine mode dominated aerosols, while the 1,610 and 2,250 nm bands are both indispensable for retrievingV0 f, mr f, and reff f in tandem for the coarse mode dominated aerosols. The analysis also reveals that C could be further retrieved by including scalar radiance and that measurement errors have significantly larger influences on the retrieval uncertainties than model errors. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114454
Appears in Collections: 气候减缓与适应
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作者单位: State Environment Protection Key Laboratory of Satellite Remote Sensing, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China; Department of Chemical and Biochemical Engineering, Center of Global and Regional Environmental Studies, and Informatics Initiative, University of Iowa, Iowa City, IA, United States; Laboratoire d'Optique Atmosphérique, Villeneuve d'Ascq, France
Recommended Citation:
Hou W.,Li Z.,Wang J.,et al. Improving Remote Sensing of Aerosol Microphysical Properties by Near-Infrared Polarimetric Measurements Over Vegetated Land: Information Content Analysis[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)