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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3378–3381

Measuring cloud droplet effective radius and liquid water content using changes in degree of linear polarization along cloud depth

Dukhyeon Kim and Jeongsoon Lee  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3378-3381 (2014)
http://dx.doi.org/10.1364/OL.39.003378


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Abstract

Two important parameters of liquid clouds are the cloud effective size (CES) and liquid water content (LWC). To measure these parameters, we have used two multiple scattering depolarization effects: (1) the slope of the degree of linear polarization (SLDLP) at the cloud base, and (2) the saturated degree of linear polarization (SADLP) at infinite altitude. We used Monte Carlo simulation to validate this method, with the assumption that the water cloud droplet size follows a Gamma distribution. From our calculation, we find that although the SADLP varies with both extinction coefficient (or LWC) and the CES, the SLDLP varies only with the extinction coefficient. After extracting the extinction coefficient using the SLDLP, we can easily obtain the CES using the SADLP. As a result, we found that the CES and the LWC can be extracted from the experimental parameters of SLDLP and SADLP, which can be easily measured using a single wavelength depolarization LIDAR.

© 2014 Optical Society of America

OCIS Codes
(280.3640) Remote sensing and sensors : Lidar
(290.2200) Scattering : Extinction
(290.4210) Scattering : Multiple scattering
(010.1615) Atmospheric and oceanic optics : Clouds
(290.5855) Scattering : Scattering, polarization

ToC Category:
Scattering

History
Original Manuscript: January 22, 2014
Revised Manuscript: April 22, 2014
Manuscript Accepted: April 24, 2014
Published: June 2, 2014

Citation
Dukhyeon Kim and Jeongsoon Lee, "Measuring cloud droplet effective radius and liquid water content using changes in degree of linear polarization along cloud depth," Opt. Lett. 39, 3378-3381 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3378


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