Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm41a..05h&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SM41A-05
Physics
2435 Ionospheric Disturbances, 2463 Plasma Convection, 2479 Solar Radiation And Cosmic Ray Effects, 3384 Waves And Tides
Scientific paper
The mesopause region (ca. 80-110 km) is a cold and curious place in the Earth's atmosphere. Temperatures therein are colder in summer and warmer in winter because gravity waves that propagate into the region from the lower atmosphere dissipate, depositing their energy and momentum and driving a residual circulation from the summer to winter hemispheres with upwelling and downwelling over the respective poles. Large and ubiquitous solar atmospheric tidal variations characterize the large-scale dynamics near the mesopause. These global waves also originate in the lower atmosphere and grow exponentially as they propagate upward. Solar geomagnetic disturbances can penetrate downward into the mesopause region and affect the dynamics and chemistry. This presentation will overview the penetration of solar storm effects into the Earth's atmosphere with an emphasis on the mesopause region effects during the April 2002 storm period. These effects include modifications to the quiescent circulation, neutral composition changes, and temperature variations.
Hagan Maura E.
Roble Raymond G.
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