HR: 17:45h
AN: A54B-08    [Abstracts]
TI: Towards an Earth System Model: Validating Interactive DMS Emissions, and the Importance of Making Atmospheric-Chemistry Interactive
AU: * Cameron-Smith, P J
EM: pjc@llnl.gov
AF: Lawrence Livermore National Lab., 7000 East Avenue, Livermore, CA 94550, United States
AU: Elliott, S
EM: sme@lanl.gov
AF: Los Alamos National Lab., Bikini Atoll Road, Los Alamos, NM 87545, United States
AU: Chuang, C C
EM: chuang1@llnl.gov
AF: Lawrence Livermore National Lab., 7000 East Avenue, Livermore, CA 94550, United States
AU: Bergmann, D
EM: bergmann1@llnl.gov
AF: Lawrence Livermore National Lab., 7000 East Avenue, Livermore, CA 94550, United States
AB: We are laying the foundation for an Earth System Model (ESM) focused on the sulfur cycle. This ESM will be based on the Community Climate System Model (CCSM) with a fast atmospheric chemistry & aerosol capability communicating with an ocean sulfur-cycle incorporated into the ocean biogeochemistry module. We will present a validation of the di-methyl-sulfide (DMS) emissions from the ocean component using comparison of observed atmospheric sulfate aerosols with the sulfate aerosols calculated using our atmospheric chemistry & aerosol capability. The interactive ocean sulfur-cycle capability has previously been tuned to the in situ observational database of Kettle et al. (2000), but not to any atmospheric sulfate measurements, so this is an independent validation. We will also present the results of simulations to evaluate the importance of including atmospheric chemistry interactively in long steady-state climate simulations. In particular, we will show the impact on the mean and variance of zonal mean temperature and precipitation.
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0330 Geochemical cycles (1030)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting