Impact of clouds on microwave remote sensing

Autori

• Thonipparambil Ravindranathan Sreerekha

Parametri

• Libri di testo
• Libri di testo universitari

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Cirrus clouds, scattering, radiative transfer, microwave. - The thesis presents a new radiative transfer model that can take into account the impact of cirrus clouds on microwave satellite remote sensing. The ice particles in cirrus clouds interact with microwave radiation mostly through scattering. This can also lead to polarization of the radiation. Thus, a radiative transfer model that can solve the vector radiative transfer equation for a multiple scattering medium is essential. This has led to the development of the scattering version of the Atmospheric Radiative Transfer Simulator (ARTS), which was previously a clear sky radiative transfer model. The model can be used for up, limb- and down-looking sensors, although this thesis focuses only on the effect of clouds on down-looking sensors. In order to understand the scattering signal produced by cirrus clouds, it is essential to know the ranges of cirrus microphysical properties and how they are influencing the single scattering properties of the ice particles in the cirrus clouds. The work presented here shows that single scattering properties are highly dependent on the size parameter. The radiative transfer simulations are done for various cloud scenarios at some example frequencies, which correspond to the center frequencies of the upper side band of the channels of the Advanced Microwave Sounding Unit-B (AMSU-B) instrument. The sensitivity to cirrus cloud ..

Lingua: Inglese

Pubblicato: 2005

(In brossura)