Large potential energy of gravity waves over a smooth surface with little convection: Simulation and observation

Details Large potential energy of gravity waves over a smooth surface with little convection: Simulation and observation Large potential energy of gravity waves over a smooth surface with little convection: Simulation and observation

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30h..21k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 8, pp. 21-1, CiteID 1438, DOI 10.1029/2003GL016960

Physics

11

Meteorology And Atmospheric Dynamics: General Circulation, Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics (0341, 0342), Meteorology And Atmospheric Dynamics: Tropical Meteorology

Scientific paper

A numerical experiment is conducted using an Atmospheric General Circulation Model (AGCM) to investigate the presence of the large potential energy over a region of low topography and little convective activity, focusing on the tropical Atlantic region (10°E to 20°W, 0° to 20°S). It is found that gravity waves with a time period of 24 hours are excited near the Equator (~5°-15°N) in a region of large moist heating extending vertically up to 10-13 km. The gravity waves propagate upward from this region with a bias toward the south and are manifested as large energy fluxes in the cross equatorial region. Enhanced energy fluxes are therefore simulated at 20-30 km altitude over a region with no significant source of gravity waves, and are confirmed using Global Positioning Satellite/Meteorology (GPS/MET) experiment data.

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