Iron atom densities in the polar mesosphere from lidar observations

Details Iron atom densities in the polar mesosphere from lidar observations Iron atom densities in the polar mesosphere from lidar observations

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2345a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Dec. 1990, p. 2345-2348.

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29

Atom Concentration, Iron, Mesosphere, Radar Measurement, Atmospheric Composition, Laser Applications, Optical Radar, Polar Regions

Scientific paper

Between March 24 and April 6, 1990, lidar measurements of iron densities above Andoya, Norway (69 deg N) were performed. In each of the five nights of measurements, a regular Fe layer was observed which was confined to the altitude region between 80 and 100 km. Its peak Fe densities occurred at (84.5 + or - 1) km or approximately 6 km lower than the peak of the sodium layer as observed two weeks earlier. The regular Fe layer exhibited column densities of (9 + or - 4) x 10 to the 9th/sq cm and maximum number densities close to 7000/cu cm. In addition, sporadic Fe layers were observed frequently between 88 and 108 km, one of which reached a maximum number density of 78,000/cu cm near 97 km altitude.

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