Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508805s&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 8, CiteID L08805
Physics
7
Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Cloud/Radiation Interaction, Global Change: Remote Sensing (1855), Hydrology: Precipitation (3354)
Scientific paper
The layer-mean radar reflectivity $\bar{Z e observed by CloudSat and the columnar effective particle radius R e obtained from a combined microwave-shortwave analysis are combined to investigate the joint relationships between $\bar{Z e and R e for warm clouds. Global statistics for seasonally averaged data reveals that radar reflectivities $\bar{Z e less than about -10 dBZ tend to relate to the effective radius via a sixth-power dependency, corresponding to a constant number concentration implying that the condensation particle growth process mainly takes place within the cloud layer for $\bar{Z e < -10 dBZ. For $\bar{Z e > -10 dBZ, $\bar{Z e depends on R e through a cubic relation, corresponding to a constant mass concentration implying coagulation as the dominant particle growth process. These microphysical regimes so identified are shown to be consistent with CloudSat-inferred rainfall rate.
Stephens Graeme L.
Suzuki Kentaroh
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