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Understanding the polarization signal of spherical particles for microwave limb radiances

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



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.

Item URL in elib:https://elib.dlr.de/45863/
Document Type:Article
Title:Understanding the polarization signal of spherical particles for microwave limb radiances
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Teichmann, ClaasUniv. Bremen, BremenUNSPECIFIEDUNSPECIFIED
Buehler, Stefan AlexanderUniv. Bremen, BremenUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Journal of Quantitative Spectroscopy and Radiative Transfer
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 179-190
Keywords:Radiative transfer, Microwave remote sensing, Scattering, Cirrus clouds, Limb observations, Polarization
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Emde, Dr.rer.nat. Claudia
Deposited On:16 Feb 2007
Last Modified:06 Sep 2019 15:28

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