HR: 0800h
AN: A21A-0712    [Abstracts]
TI: The Role of Deep Convection in Establishing the Isotopic Composition of Water Vapor in the Tropics
AU: * Smith, J A
EM: jamisons@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 392 UCB, Boulder, CO 80309-0392 United States
AU: Ackerman, A S
AF: NASA Ames Research Center, Earth Sciences Division, Mail Stop 245-4, Moffet Field, CA 94035-1000 United States
AU: Jensen, E J
AF: NASA Ames Research Center, Earth Sciences Division, Mail Stop 245-4, Moffet Field, CA 94035-1000 United States
AU: Toon, O B
AF: Laboratory for Atmospheric and Space Physics, University of Colorado at Boulder, 392 UCB, Boulder, CO 80309-0392 United States
AU: Toon, O B
AF: Program in Atmospheric and Oceanic Science, University of Colorado at Boulder, UCB 311, Boulder, CO 80309-0311 United States
AB: We employ a three-dimensional large eddy simulation with bin-resolved microphysics to simulate the distribution of water isotopomers within deep convection. Deep convection produces vertical profiles of HDO vapor that deviate significantly from the Rayleigh distillation model. These deviations are caused by the lofting of HDO-rich cloud ice within convective updrafts and the subsequent sublimation of this ice in cumulonimbus anvils. The model results agree with recent remote sensing observations of the tropical transition layer.
DE: 0320 Cloud physics and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting