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The impact of aerosols on polarized sky radiance: model development, validation, and applications

Emde, Claudia and Buras, R. and Mayer, B. and Blumthaler, M. (2010) The impact of aerosols on polarized sky radiance: model development, validation, and applications. Atmospheric Chemistry and Physics, 10, pp. 383-396. Copernicus Publications. doi: 10.5194/acp-10-383-2010.


Official URL: http://www.atmos-chem-phys.net/10/383/2010/


Although solar radiation initially is unpolarized when entering the Earth's atmosphere, it is polarized by scattering processes with molecules, water droplets, ice crystals, and aerosols. Hence, measurements of the polarization state of radiation can be used to improve remote sensing of aerosols and clouds. The analysis of polarized radiance measurements requires an accurate radiative transfer model. To this end, a new efficient and flexible three-dimensional Monte Carlo code to compute polarized radiances has been developed and implemented into MYSTIC (Monte Carlo code for the phYSically correct Tracing of photons In Cloudy atmospheres). The code has been extensively validated against published benchmark results. The polarized downwelling radiation field is calculated for various aerosol types showing the high sensitivity of polarized ultraviolet radiances to the particle microphysics. Model simulations are compared to ground based measurements and found to be qualitatively in good agreement. Quantitative differences can be attributed to the assumed aerosol models based on the OPAC aerosol database, which does not include exactly the types of aerosols that have been observed. This comparison to the measurements shows that there is a high potential to retrieve information about the aerosol type from polarized radiance measurements.

Item URL in elib:https://elib.dlr.de/65842/
Document Type:Article
Title:The impact of aerosols on polarized sky radiance: model development, validation, and applications
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Blumthaler, M.Medizinische Univ. Innsbruck, Innsbruck, AUNSPECIFIED
Date:1 January 2010
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/acp-10-383-2010
Page Range:pp. 383-396
Publisher:Copernicus Publications
Keywords:radiative transfer, polarization, Monte Carlo method, aerosols, clouds
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Freund, Jana
Deposited On:26 Oct 2010 10:15
Last Modified:02 May 2019 14:04

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