HR: 1340h
AN: A13C-1359    [Abstracts]
TI: In situ measurements of subvisual cirrus from the WB-57 aircraft during TC4
AU: * Davis, S M
EM: seand@colorado.edu
AF: Department of Atmospheric and Oceanic Science/LASP University of Colorado, 1234 Innovation Dr., Boulder, CO 80305,
AU: Avallone, L M
EM: avallone@lasp.colorado.edu
AF: Department of Atmospheric and Oceanic Science/LASP University of Colorado, 1234 Innovation Dr., Boulder, CO 80305,
AB: Subvisual cirrus (SVC) clouds are ubiquitous, and are recognized as playing an important, yet poorly constrained, role in Earth's radiation budget as well as stratospheric dehydration processes. During the 6 August TC4 flight, the WB-57 made several vertical profiles of a subvisual cirrus layer. Data from the cloud physics lidar (CPL) aboard the NASA ER-2 aircraft confirms the presence of this SVC layer, which would have likely gone unnoticed in the in situ data set because of the low signal contrasts relative to background. Measurements made during the SVC passes include total water/ice water content (IWC), cloud particle spectrometer and imaging measurements, and water vapor. These measurements are presented and compared to recent work on subvisual cirrus from the 2006 CR-AVE campaign, which was also based out of Costa Rica.
DE: 0320 Cloud physics and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting