Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.2013m&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 17-18, p. 2013-2016.
Physics
2
Traveling Ionospheric Disturbances, Atmospheric Gravity Waves
Scientific paper
This paper deals with how atmospheric gravity waves produce the traveling ionospheric disturbances (TIDs) that are observed by ionosondes. It is shown that, rather than directly producing variations of ionospheric height, a likely mechanism involves changes in ionization density by gradients in the horizontal atmospheric gravity wave air motion. These density changes can be observed as variations of the height of an ionospheric isodensity surface (the usual way of measuring TIDs). This mechanism involving enhancement/depletion of ionospheric density requires quite moderate atmospheric gravity wave air motion speeds, and works well at almost all latitudes.
Abdu Mangalathayil Ali
Batista Inez
Jayachandran P. T.
MacDougall John
Roberto Fagundes Paulo
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