Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsa51b1937h&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SA51B-1937
Physics
[3389] Atmospheric Processes / Tides And Planetary Waves
Scientific paper
A stratospheric sudden warming (SSW) is the most dramatic event in the winter polar region, and may affect the ionosphere through wave-tide coupling. Planetary waves (PW) 1 and 2 can be used to quantify the asymmetry of the polar vortex before an SSW, and may disrupt vertically propagating atmospheric tides to produce changes in the ionosphere. FORMOSAT-3/COSMIC data are used to observe the Northern Hemisphere SSWs in 2008 and 2009 during solar minimum conditions at select longitudes. Ionospheric electrodynamic perturbations from ground-based GPS TECs during the same time periods are also presented and discerned. In general, the ionospheric perturbations in lower latitude occur few days after the stratospheric temperature intensely increases. The ground-based GPS TEC reveals a semidiurnal period which increases in the morning but decreases in the afternoon period.
Chang Chi-Ling
Huang Haifeng
Lin Chaney
Liu Jian-Guo
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