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

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

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

Kurzfassung

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.

Dokumentart:Zeitschriftenbeitrag
Titel:The impact of aerosols on polarized sky radiance: model development, validation, and applications
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Emde, ClaudiaNICHT SPEZIFIZIERT
Buras, R.NICHT SPEZIFIZIERT
Mayer, B.NICHT SPEZIFIZIERT
Blumthaler, M.Medizinische Univ. Innsbruck, Innsbruck, A
Datum:1 Januar 2010
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:10
DOI :10.5194/acp-10-383-2010
Seitenbereich:Seiten 383-396
Status:veröffentlicht
Stichwörter:radiative transfer, polarization, Monte Carlo method, aerosols, clouds
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Fernerkundung der Atmosphäre
Hinterlegt von: Jana Freund
Hinterlegt am:26 Okt 2010 10:15
Letzte Änderung:12 Dez 2013 21:03

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