Physics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2815h&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 14, p. 2815-2818
Physics
23
Ionosphere: Ionospheric Irregularities, Meteorology And Atmospheric Dynamics, Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions, Radio Science: Radar Atmospheric Physics
Scientific paper
GPS/MET observations of the tropical atmosphere of the southern hemisphere (5°S to 25°S) during February 1997 are analyzed, when a high amount of convective tropospheric water vapor is at these latitudes. Enhanced gravity wave activity of the lower stratosphere at h=22-28km is associated to areas of increased tropospheric water vapor pressure at h=4-6km, regarded as a measure of tropical convection. Sporadic E and other ionospheric irregularities (vertical scales less than 7 km) of the mesosphere/lower thermosphere are observed to be highly correlated to gravity wave activity in the lower stratosphere and to tropical convection zones. We find 4 areas of enhanced ionospheric irregularities and stratospheric wave activity over Pacific (around 140°W), Brazil (50°W), Africa (40°E), and Indonesia/Australia (110°E).
Hocke Klemens
Tsuda Toshitaka
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