Physics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2385n&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 22, p. 2385-2388
Physics
5
Atmospheric Composition And Structure: Evolution Of The Atmosphere, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques
Scientific paper
Ground based FTIR absorption measurements have been performed to study the zenith column densities of HF, N2O, CFC-12, and CFC-22. The spectra were recorded in the Arctic (Ny-Ålesund, Spitsbergen, 79°N, 12°E) during winter 1992/93 and spring/summer 1993. During the polar night the moon served as light source. The analysis of the spectra has been performed in the way to study vertical motions in the atmosphere. Compared to the summer observations a subsidence of -1.4 km at 12 km altitude and -4.9 km at about 15 km has been calculated for December 1992. For February 1993 the data yield a subsidence of -2.5 km at 12 km altitude and -6.3 km at about 15 km altitude.
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