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RISZones of Increased and Decreased Droplet Concentration in Stratiform Clouds
Publisher: American Meteorological Society
Abstract: The finescale, spatial inhomogeneity of cloud-droplet concentration in stratiform clouds is studied using FSSP-100 data with 10-m or better resolution from 1700 km of cloud penetrations between +5° and ?20°C. The data are ...
FSSP Characterization with Monodisperse Water Droplets
Publisher: American Meteorological Society
Abstract: A droplet generator was used to calibrate and study some features of the forward-scattering spectrometer probe (FSSP). The generator produces a stable jet of monodisperse droplets with the rate of 50?500 droplets per second ...
Evaluation of the Accuracy of PMS Optical Array Probes
Publisher: American Meteorological Society
Abstract: This paper considers the theory of diffraction image formation of spherical particles and peculiarities of particle sizing by discrete imaging probes. The diffraction images of spherical water droplets are approximated by ...
Evaluation of Measurements of Particle Size and Sample Area from Optical Array Probes
Publisher: American Meteorological Society
Abstract: The technique of using shadow images of particles, obtained in coherent illumination to measure particle size, is analyzed. The theory of Fresnel diffraction for an opaque disc was used to analyze shadow images of transparent ...
Thermodynamics of Icing Cylinder for Measurements of Liquid Water Content in Supercooled Clouds
Publisher: American Meteorological Society
Abstract: The Rosemount Icing Detector (RICE) has been used extensively over the last three decades for aircraft measurements of the rate of ice riming in supercooled liquid and mixed clouds. Because of difficulties related to ...
Laboratory Measurements of the Response of a PMS OAP-2DC
Publisher: American Meteorological Society
Abstract: Laboratory measurements of the response of the Particle Measuring Systems, Inc., 2DC probe have been conducted to characterize counting and sizing errors of the probe for spherical particles. Measurements of the shadow ...
The Nevzorov Airborne Hot-Wire LWC–TWC Probe: Principle of Operation and Performance Characteristics
Publisher: American Meteorological Society
Abstract: The Nevzorov liquid water content (LWC) and total water content (TWC) probe is a constant-temperature, hot-wire probe designed for aircraft measurements of the ice and liquid water content of clouds. The probe consists of ...
Quantification of the Effects of Shattering on Airborne Ice Particle Measurements
Publisher: American Meteorological Society
Abstract: ce particle shattering poses a serious problem to the airborne characterization of ice cloud microstructure. Shattered ice fragments may contaminate particle measurements, resulting in artificially high concentrations of ...
Polarization of Thermal Microwave Atmospheric Radiation Due to Scattering by Ice Particles in Clouds
Publisher: American Meteorological Society
Abstract: The polarization difference ?Tb between the vertical and horizontal components of thermal radiation emitted by clouds was studied using 37- and 85-GHz radiometers. The measurements were conducted during the Alliance Icing ...