HR: 14:40h
AN: A33H-05 [Abstracts]
TI: Evaluation of Transport Characteristics and Chemical Composition in the UTLS region using a 3D Chemistry-Climate Model
AU: * Kinnison, D E
EM: dkin@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Tilmes, S
EM: tilmes@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Pan, L
EM: liwen@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Schauffler, S
EM: sues@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Orlando, J
EM: orlando@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Garcia, R
EM: rgarcia@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Gettelman, A
EM: andrew@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AU: Lamarque, J
EM: lamar@ucar.edu
AU: Brasseur, G
EM: brasseur@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80503, United
States
AB:
Three-dimensional coupled chemistry-climate models (CCMs) are currently being used to evaluate the evolution
of stratospheric ozone throughout the 21st century (WMO/UNEP, 2007). Presently, little effort has been made to
evaluate the chemical and dynamical performance of these CCMs in the upper troposphere and lower
stratosphere (UTLS). Coupled models with tropospheric chemistry generally do not include resolve the dynamics
of the UTLS, and models with appropriate stratospheric dynamics do not include a detailed representation of
tropospheric chemical processes. In this study, we will use the Whole Atmosphere Community Climate Model
(WACCM), a CCM developed at NCAR, to examine the impact on the UTLS of including a detailed representation
of tropospheric chemical processes. We will contrast simulations from this version of WACCM with simulations
that include only middle atmosphere chemical processes. The evaluation of both simulations will be compared
with available in-situ tracer observations, specifically measurements obtained from several NASA high altitude
aircraft field campaigns over North America.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting