HR: 11:20h
AN: A12C-05    [Abstracts]
TI: Comparison of Atmospheric Variability in Coupled and Un-coupled AGCM Simulations
AU: * Kumar, A
EM: arun.kumar@noaa.gov
AF: Climate Prediction Center/NCEP, 5200 Auth Road, Rm 800, Camp Springs, MD 20746 United States
AB: In nature, ocean and atmosphere are a coupled system where by atmospheric variability influences the evolution of sea surface temperatures (SSTs), and in turn, is influenced by variations in SSTs. On the other hand, in our attempts to understand the observed atmospheric variability on different time scales, it has been a traditional practice to use atmospheric general circulation (AGCM) models where coupled air-sea interactions are severed artificially, and SSTs are treated external to the evolution of the atmosphere. In the so called experimental set of AMIP integrations, temporal evolution of the specified SSTs is not constrained to be consistent with the fluxes at the ocean-atmosphere interface. A question that has attracted considerable attention, and continues to do so, is how does atmospheric variability differs between coupled and atmosphere alone general circulation (GCM) integrations? To investigate this question, results from an analysis of atmospheric variability in coupled and uncoupled simulations will be presented.
DE: 1626 Global climate models (3337, 4928)
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005