Computer Science – Sound
Scientific paper
Aug 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.1723i&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 16, p. 1723-1726
Computer Science
Sound
8
Atmospheric Composition And Structure: Evolution Of The Atmosphere, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry
Scientific paper
Column densities of CHF2Cl (HCFC-22) have been measured over Table Mountain Facility (TMF), Wrightwood, California (34.4°N) using the Atmospheric Trace Molecule Spectroscopy (ATMOS) Fourier-transform infrared (FTIR) spectrometer. Between October 1985 and July 1990, the exponential column increase rate was (6.5+/-0.5)% yr-1. Additionally, column measurements of CHF2Cl over McMurdo Sound, Antarctica (78°S) in September and October 1986 by the MarkIV FTIR spectrometer were used to derive a south-north interhemispheric ratio of (0.86+/-0.08). Model calculations investigated the feasibility of using CHF2Cl column measurements with a predicted global OH field to determine a globally averaged chemical lifetime for CHF2Cl, or equivalently, an estimate of the OH field using a predicted lifetime. The current uncertainty in historical CHF2Cl emissions is too large for CHF2Cl to be used to infer adequately either the lifetime or the OH field.
Brown Margaret
Gunson Michael R.
Irion Fredrick W.
Toon Geoffrey C.
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