Computer Science – Sound
Scientific paper
Apr 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1415g&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 8, p. 1415-1418
Computer Science
Sound
20
Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry
Scientific paper
The MIDAS-DROPPS campaign conducted in Norway in 1999 provided a comprehensive study of the high-latitude summer mesopause region with rocket-borne and ground-based instrumentation. Optical photometers were flown on two rocket payloads through substantially different mesospheric conditions. On both flights, distinct noctilucent cloud (NLC) layers were detected. We present the first analysis of NLC scattering phase functions observed from sounding rockets. Applying Mie calculations, the angular dependence of the scattering is used to extract information about particle sizes. The first flight featured a weak NLC with small particles (r<=20nm) located below the core of a strong polar mesosphere radar echo (PMSE). The second flight took place in the absence of any detectable PMSE and probed a bright NLC optically dominated by particles in the size range 40-50 nm.
Gumbel Jörg
Murtagh Donal P.
Stegman Jacek
Witt Georg
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