NDLI: Passive microwave signatures of the melting layer in stratiform clouds

Content Provider	IEEE Xplore Digital Library
Author	Bauer, P. Poiares Baptista, J.P.V. de Iulis, M.
Copyright Year	1997
Description	Author affiliation: Space Syst. Anal. Div., Aerosp. Res. Establ., Koeln, Germany (Bauer, P.)
Abstract	A study was carried out in order to estimate the effect of melting particles on brightness temperatures at microwave frequencies between 10.7 and 85.5 GHz. A meteorological model framework was set up to determine the melting stage of various frozen particles below the freezing layer. Different approaches for calculating the effective permittivity of mixed particles were compared. The resulting extinction coefficients, single scattering albedos, and asymmetry parameters indicate a maximum effect when a water matrix with air/ice inclusions is assumed. Extreme local differences of 20-25% between the optical parameters employing either a Marshall-Palmer or a Gamma-type dropsize distribution occur. When radiative transfer calculations are carried out, maximum deviations of >20 K at low frequencies are observed. Neglecting the melting effect may lead to severe overestimations of surface rainrates by up to 100% in stratiform conditions.
Starting Page	1275
Ending Page	1277
File Size	282079
Page Count	3
File Format	PDF
ISBN	0780338367
DOI	10.1109/IGARSS.1997.606421
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-08-03
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical scattering Frequency estimation Brightness temperature Microwave frequencies Meteorology Permittivity Extinction coefficients Particle scattering Scattering parameters Ice
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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