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Proceedings Paper

Application of a multifilter shadowband radiometer and microwave radiometer for ground based evaluation of aerosol-cloud interactions
Author(s): Barry Gross; Lina Cordero; Julia He; Bomidi Madhalvan; Fred Moshary; Sam Ahmed
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Paper Abstract

The quantification of the first direct aerosol cloud interaction mechanism requires simultaneous observations of cloud water drop properties as well as aerosol properties below the cloud. The simultaneous measurement of both these properties is very difficult from space borne systems and efforts to develop ground remote sensing measurements are critical. To measure the cloud properties, we make use of an approach which combines a Microwave radiometer and a MFRSR radiometer for simultaneous Cloud Optical Depth (COD) and Liquid Water Path (LWP). From these measurements, effective droplet diameter can be estimated assuming the homogeneity of the cloud. In using the diffuse flux, we confirm that for COD > 2 and solar zenith angles < 60, the standard MFRSR correction can be applied with errors < 1%. In addition, we develop a method whereby regional retrieval of Microphysical properties from multispectral extinction measurements can be made based on NN based methods trained on full sky scans. Also, we discuss the uncertainty in the inferred COD due to various input parameters in the formation of Look-Up-Tables and present preliminary data sets for evaluation. Finally, we discuss methods to extract useful aerosol information during partly cloudy conditions that can be used to better define the state of the aerosol prior to cloud interaction.

Paper Details

Date Published: 26 October 2011
PDF: 10 pages
Proc. SPIE 8177, Remote Sensing of Clouds and the Atmosphere XVI, 81770N (26 October 2011); doi: 10.1117/12.898366
Show Author Affiliations
Barry Gross, The City College of New York (United States)
Lina Cordero, The City College of New York (United States)
Julia He, The City College of New York (United States)
Bomidi Madhalvan, The City College of New York (United States)
Fred Moshary, The City College of New York (United States)
Sam Ahmed, The City College of New York (United States)

Published in SPIE Proceedings Vol. 8177:
Remote Sensing of Clouds and the Atmosphere XVI
Evgueni I. Kassianov; Adolfo Comeron; Richard H. Picard; Klaus Schäfer, Editor(s)

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