First Lidar Observations of Middle Atmosphere Temperatures, Fe Densities, and Polar Mesospheric Clouds Over the North and South Poles
Gardner, Chester S.; Papen, George C.; Chu, Xinzhao; Pan, Welin
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https://hdl.handle.net/2142/73141
Description
Title
First Lidar Observations of Middle Atmosphere Temperatures, Fe Densities, and Polar Mesospheric Clouds Over the North and South Poles
Author(s)
Gardner, Chester S.
Papen, George C.
Chu, Xinzhao
Pan, Welin
Issue Date
2001-04-01
Keyword(s)
South Pole
Lidar
Geographic Coverage
South Pole
Abstract
An Fe Boltzmann temperature lidar was used to
obtain the first measurements of middle atmosphere temperatures,
Fe densities, and polar mesosphericlouds (PMCs)
over the North and South Poles during the 1999-2000 summer
seasons. The measured temperature structure of the
mesopause and lower thermosphere regions in mid-summer
at both Poles is consistent with the MSIS90 model. The
density profiles of the normal Fe layer between 80-100 km
at summer solstice are similar at both the North and South
Poles with maximum densities of about 2000 cm -a. Sporadic
Fe (Fes) layers were observed at both Poles with peak
densities at 106 km altitude. The maximum densities of the
Fes layers were 232x10 a cm -a at North Pole and 6.52x10 a
cm -a at South Pole. PMCs were detected above both Poles.
The altitudes of PMCs over the South Pole were consistently
2-3 km higher than those observed over the North Pole.
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