Computer Science – Sound
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..937b&link_type=abstract
Geophysical Research Letters, vol. 7, Nov. 1980, p. 937-940.
Computer Science
Sound
4
Air Sampling, Atmospheric Composition, Bromine, Chlorine, Stratosphere, Airborne Equipment, Balloon Sounding, Iodine, Neutron Activation Analysis
Scientific paper
A total halogen collection system employing ultra-pure activated charcoal traps has been developed for use in the stratosphere aboard aircraft and balloon sampling platforms. Neutron activation techniques for low-level chlorine, bromine, and iodine analysis within the activated charcoal sampling matrix were developed. Initial results from six aircraft flights and one balloon mission in the lower stratosphere are presented for latitudes ranging from 16 deg N to 67 deg N. Little variability was observed in twelve total gaseous and particulate chlorine determinations as a function of latitudes at 20 km with values ranging between 2.7 + or - 0.9 ppbv and 3.2 + or - 0.7 ppbv. Five total bromine values showed substantial variability ranging from 7 + or - 4 pptv to 40 + or - 11 pptv. No iodine was observed in any samples but a calculated total iodine upper limit of less than 3 pptv was determined.
Berg Walter W.
Crutzen Paul J.
Gitlin S. N.
Grahek F. E.
Sedlacek W. A.
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