5.3 Horizontal gradients and vertical profiles of in-situ cloud properties measured during the Tropical Warm Pool International Cloud Experiment (TWP-ICE)

Tuesday, 11 July 2006: 9:00 AM
Ballroom AD (Monona Terrace Community and Convention Center)
Greg McFarquhar, University of Illinois, Urbana, IL; and J. Um, M. Freer, G. Kok, R. McCoy, and T. Tooman

In-situ measurements of vertical profiles and horizontal gradients of ice particle sizes, shapes and number concentrations were made by the Atmospheric Radiation Measurement Uninhabited Aerospace Vehicle's (ARM UAV) payload of instrumentation on the Scaled Composites Proteus aircraft in fresh anvils, aging anvils and in generic cirrus during TWP-ICE. In this presentation, measurements of size distributions of ice crystals with sizes between about 1 and 50 micrometers from a Cloud and Aerosol Spectrometer (CAS) and a Cloud Droplet Probe (CDP) and of ice crystals with sizes between about 100 and 1600 micrometers from a Cloud Imaging Probe, and of ice crystal shapes determined from a Cloud Particle Imager (CPI) are compared for cirrus of varying ages and origins. Measurements of bulk water content from a Cloud Spectrometer and Impactor Probe and from a Nevzorov probe and of extinction from a Cloud Integrating Nephelometer (CIN) are placed in the same context. Implications of these results for cloud modeling studies are discussed.

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