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Parameterization of the Condensation Process in Small Nonprecipitating Cumuli
Publisher: American Meteorological Society
Abstract: Measurements of the droplet size distribution collected in a field of small nonprecipitating cumuli are analyzed. It appears that despite the high variability of the measured droplet concentration, the droplet spectral ...
Observational Study of the Entrainment-Mixing Process in Warm Convective Clouds
Publisher: American Meteorological Society
Abstract: Thermodynamical and microphysical measurements collected in convective clouds are examined within the frame of the homogeneous/inhomogeneous mixing concept, to determine how entrainment-mixing processes affect cloud droplets, ...
Droplet Spectra Broadening in Cumulus Clouds. Part I: Broadening in Adiabatic Cores
Publisher: American Meteorological Society
Abstract: Measurements of cloud droplet spectra performed with the Fast-Forward Scattering Spectrometer Probe during the Small Cumulus Microphysics Study (1995) are analyzed. Fifty cloud samples with narrow droplet spectra are ...
Droplet Spectra Broadening in Cumulus Clouds. Part II: Microscale Droplet Concentration Heterogeneities
Publisher: American Meteorological Society
Abstract: Cloud samples of narrow spectra observed in adiabatic cores of cumulus clouds are selected and the droplet spatial distribution is examined in order to document microscale heterogeneities of the droplet concentration. ...
Comparison between Standard and Modified Forward Scattering Spectrometer Probes during the Small Cumulus Microphysics Study
Publisher: American Meteorological Society
Abstract: Microphysical measurements performed during the Small Cumulus Microphysics Study (SCMS) experiment are analyzed in order to examine the instrumental limitations of forward scattering spectrometer probes (FSSPs). Complementary ...
Cumulus Entrainment and Cloud Droplet Spectra: A Numerical Model within a Two-Dimensional Dynamical Framework
Publisher: American Meteorological Society
Abstract: A simple numerical model designed to predict the evolution of cloud droplet spectra with special emphasis on the role of entrainment is developed for a case of nonprecipitating cloud. The model assumes that the cloud water ...
Entrainment-Mixing and Radiative Transfer Simulation in Boundary Layer Clouds
Publisher: American Meteorological Society
Abstract: In general circulation models, clouds are parameterized and radiative transfer calculations are performed using the plane-parallel approximation over the cloudy fraction of each model grid. The albedo bias resulting from ...
Droplet Spectra Measurements with the FSSP-100. Part I: Low Droplet Concentration Measurements
Publisher: American Meteorological Society
Abstract: Entrainment-mixing processes such as droplet spectrum broadening and its impact on the onset of precipitation are, among many others, physical phenomena whose experimental study relies on in-cloud airborne measurements. ...
Droplet Spectra Measurements with the FSSP-100. Part II: Coincidence Effects
Publisher: American Meteorological Society
Abstract: At high droplet number concentration, measurements of the droplet number concentration, of the droplet spectrum, and of the liquid water content with the FSSP-100 are significantly affected by the coincidences of particles ...
Real-Time Detection of Performance Degradation of the Forward-scattering Spectrometer Probe
Publisher: American Meteorological Society
Abstract: A method for detecting malfunctions during collection of data with the forward-scattering spectrometer probe (FSSP) is discussed. Droplet spectra measured with the probe are not sufficient to alert operators of probe ...