GSTDTAP  > 地球科学
DOI10.1016/j.atmosres.2020.105379
Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals
A.E. Bedoya-Velásquez, M. Herreras-Giralda, R. Román, M. Wiegner, ... R. Ceolato
2020-11-25
发表期刊Atmospheric Research
出版年2020
英文摘要

Recent ceilometer models are more sensitive to aerosols, which is increasing the interest in these instruments to retrieve aerosol optical and microphysical properties. In this paper, a new methodology is proposed to retrieve aerosol vertical extinction and backscatter profiles from a Vaisala ceilometer CL51 model. This methodology is based in two parts: first, a signal pre-processing with a suppression of the dark current and background noises, and a correction of the water vapor absorption using near-real-time temperature and absolute humidity (AH) profiles from a co-located Microwave radiometer (MWR). The measured dark current shows a height-dependence from 11 km agl to the end of the profile. From the water vapor correction, it was seen that the raw ceilometer signal overestimates the water vapor corrected one, mainly below 1 km agl. Second part is based on an iterative Klett-based algorithm making use of AERONET (AErosol RObotic NETwork) AOD (Aerosol Optical Depth) and ceilometer profiles as inputs to retrieve the extinction and backscatter profiles. The sensitivity of the aerosol retrievals to the use of modelled temperature and absolute humidity from HYSPLIT to correct water vapor absorption, instead of MWR measurements, is studied. The absolute errors found in temperature and AH profiles leads to errors in the pre-processed range corrected signals up to 9%, and then in particle backscatter (βp) and particle extinction (αp) coefficients up to 2.2 % and 25 %, respectively.

领域地球科学
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/304797
专题地球科学
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A.E. Bedoya-Velásquez, M. Herreras-Giralda, R. Román, M. Wiegner, ... R. Ceolato. Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals[J]. Atmospheric Research,2020.
APA A.E. Bedoya-Velásquez, M. Herreras-Giralda, R. Román, M. Wiegner, ... R. Ceolato.(2020).Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals.Atmospheric Research.
MLA A.E. Bedoya-Velásquez, M. Herreras-Giralda, R. Román, M. Wiegner, ... R. Ceolato."Ceilometer inversion method using water-vapor correction from co-located microwave radiometer for aerosol retrievals".Atmospheric Research (2020).
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