Computer Science – Sound
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8.1071a&link_type=abstract
Geophysical Research Letters, vol. 8, Oct. 1981, p. 1071-1074.
Computer Science
Sound
12
Atmospheric Composition, Atmospheric Sounding, Error Analysis, Instrument Errors, Ozonometry, Trace Elements, Flow Velocity, Meteorological Flight, Satellite Sounding, Vertical Distribution
Scientific paper
Theory suggests that in laminar flow the percent loss of a trace constituent to the walls of a measuring instrument varies as P to the -2/3, where P is the total gas pressure. Preliminary laboratory ozone wall-loss measurements confirm this P to the -2/3 dependence. Accurate assessment of wall-loss is thus of particular importance for those balloon-borne instruments utilizing laminar flow at ambient pressure, since the ambient pressure decreases by a factor of 350 during ascent to 40 km. Measurements and extrapolations made for a Dasibi ozone monitor modified for balloon flight indicate that the wall-loss error at 40 km was between 6 and 30 percent and that the wall-loss error in the derived total ozone column-content for the region from the surface to 40 km altitude was between 2 and 10 percent. At 1000 mb, turbulence caused an order of magnitude increase in the Dasibi wall-loss.
Ainsworth J. E.
Hagemeyer J. R.
Reed E. I.
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