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Proceedings Paper

Lidar observations of temperatures, waves, and noctilucent clouds at 69° N
Author(s): Jens Fiedler; Gerd Baumgarten; Gotz von Cossart; Armin Schoch
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Paper Abstract

The ALOMAR Rayleigh/Mie/Raman (RMR) lidar is an active remote sensing instrument for the investigation of the Arctic middle atmosphere during day and night. It is located in Northern Norway and operated on a routine basis to measure relative density profiles and aerosol properties in the stratosphere and mesosphere since 1995. Temperature profiles derived from the density measurements assuming hydrostatic equilibrium are used to investigate the mean temperature structure as well as gravity waves in the polar middle atmosphere. During the last two years, temperature data were acquired for approximately 2100 hours. A subset of this data basis was used to determine the potential energy density to characterize the gravity wave activity above the station. Noctilucent clouds (NLC) are the highest clouds of the Earth's atmosphere and a visible sign of extreme atmospheric conditions with temperatures far below radiative equilibrium. During the last 7 years a continuous data set with 1880 measurement hours was acquired during the summer seasons, of which 640 hours contain NLC signatures. This actually most extensive lidar acquired NLC archive was analyzed regarding brightness, altitude, vertical extent, as well as occurrence frequency of noctilucent clouds above ALOMAR.

Paper Details

Date Published: 30 November 2004
PDF: 12 pages
Proc. SPIE 5571, Remote Sensing of Clouds and the Atmosphere IX, (30 November 2004); doi: 10.1117/12.564772
Show Author Affiliations
Jens Fiedler, Leibniz Institut fuer Atmosphaerenphysik (Germany)
Gerd Baumgarten, Leibniz Institut fuer Atmosphaerenphysik (Germany)
Gotz von Cossart, Leibniz Institut fuer Atmosphaerenphysik (Germany)
Armin Schoch, Leibniz Institut fuer Atmosphaerenphysik (Germany)

Published in SPIE Proceedings Vol. 5571:
Remote Sensing of Clouds and the Atmosphere IX
Adolfo Comeron; Michel R. Carleer; Richard H. Picard; Nicolaos I. Sifakis, Editor(s)

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