Simulation of the Tides with the Whole Atmosphere Community Climate Model

Details Simulation of the Tides with the Whole Atmosphere Community Climate Model Simulation of the Tides with the Whole Atmosphere Community Climate Model

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa73a..02g&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SA73A-02

Physics

3334 Middle Atmosphere Dynamics (0341, 0342), 3389 Tides And Planetary Waves

Scientific paper

The atmospheric thermal tides are excited by absorption of solar radiation by ozone in the stratosphere and water vapor in the troposphere, and also by latent heat release in tropical convection. Tidal oscillations propagate upward and can attain very large amplitudes in the mesosphere and lower thermosphere, where they influence composition and temperature structure. We present simulations of the migrating and non- migrating tides carried out with NCAR's Whole Atmosphere Community Climate Model (WACCM), a "high-top" (ground to 140 km) comprehensive General Circulation model with coupled chemistry. We document the seasonal and inter-annual variation of the migrating tides and some of the more important non-migrating tides, and investigate their relationship to the quasi-biennial oscillation and ENSO events, both of which can be included in the latest version of WACCM.

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