Physics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3612806m&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 12, CiteID L12806
Physics
10
Atmospheric Composition And Structure: Cloud Physics And Chemistry, Electromagnetics: Scattering And Diffraction, Atmospheric Processes: Remote Sensing, Atmospheric Processes: Precipitation (1854), Radio Science: Radar Atmospheric Physics (1220)
Scientific paper
The effects of multiple scattering on larger precipitating hydrometers have an influence on measurements of the spaceborne W-band (94 GHz) CloudSat radar. This study presents initial quantitative estimates of these effects in “dry” snow using radiative transfer calculations for appropriate snowfall models. It is shown that these effects become significant (i.e., greater than approximately 1 dB) when snowfall radar reflectivity factors are greater than about 10-15 dBZ. Reflectivity enhancement due to multiple scattering can reach 4-5 dB in heavier stratiform snowfalls. Multiple scattering effects counteract signal attenuation, so the observed CloudSat reflectivity factors in snowfall could be relatively close to the values that would be observed in the case of single scattering and the absence of attenuation.
Battaglia Alessandro
Matrosov Sergey Y.
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