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Understanding the polarization signal of spherical particles for microwave limb radiances

Teichmann, Claas und Buehler, Stefan Alexander und Emde, Claudia (2006) Understanding the polarization signal of spherical particles for microwave limb radiances. Journal of Quantitative Spectroscopy and Radiative Transfer, 101 (1), Seiten 179-190. DOI: 10.1016/j.jqsrt.2006.03.001.

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Kurzfassung

This paper presents a simple conceptual model to explain that even spherical scatterers lead to a polarization difference signal for microwave limb radiances. The conceptual model relates the polarization difference measured by a limb-looking sensor situated inside a cloud with the anisotropy of the radiation. In the simulations, it was assumed that the cloud consists of spherical ice particles with a radius of which were situated between 10.6 and 12.3 km altitude. The frequencies 318 and 500 GHz were considered. The results of the conceptual model were compared to the results of the fully polarized scattering model ARTS-1-1. The comparison showed a good qualitative agreement. The polarization difference decreases inside the cloud with increasing height and changes sign. This behavior can be related to a different amount of radiation coming from the atmosphere above and below the cloud, compared to the amount of radiation coming from the sides. The sign of polarization difference of the scattered radiation is opposite for these two radiation sources.

Dokumentart:Zeitschriftenbeitrag
Titel:Understanding the polarization signal of spherical particles for microwave limb radiances
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Teichmann, ClaasUniv. Bremen, Bremen
Buehler, Stefan AlexanderUniv. Bremen, Bremen
Emde, ClaudiaNICHT SPEZIFIZIERT
Datum:2006
Erschienen in:Journal of Quantitative Spectroscopy and Radiative Transfer
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:101
DOI :10.1016/j.jqsrt.2006.03.001
Seitenbereich:Seiten 179-190
Status:veröffentlicht
Stichwörter:Radiative transfer, Microwave remote sensing, Scattering, Cirrus clouds, Limb observations, Polarization
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W - keine Zuordnung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):W - keine Zuordnung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Fernerkundung der Atmosphäre
Hinterlegt von: Dr.rer.nat. Claudia Emde
Hinterlegt am:16 Feb 2007
Letzte Änderung:11 Nov 2014 21:56

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