Computer Science – Sound
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17...73k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Jan. 1990, p. 73-76. Research supported by MOESC and Texas Higher Educat
Computer Science
Sound
12
Aeronomy, Atmospheric Composition, Balloon Sounding, Balloon-Borne Instruments, Midlatitude Atmosphere, Nitrogen Oxides, Atmospheric Chemistry, Atmospheric Sounding, Nitrogen Dioxide, Photochemical Reactions
Scientific paper
A balloon-borne instrument to measure total odd nitrogen NO(y) has been developed. A converter which enables catalytic conversion of NO(y) into nitric oxide on a heated gold surface is combined with a chemiluminescence detector. The conversion efficiency for NO2 was measured to be close to 100 percent at pressures between 60 and 7 mb. The major source of errors in the balloon-borne measurements are the uncertainties in the estimates of the sample flow rate and the zero level of the instrument. The NO(y) concentration was measured at altitudes between 12 and 28 km with a precision of about 25 percent on a balloon experiment conducted at latitude 44 deg N in June 1989. The NO(y) concentration has been measured to be 1.5 + or - 0.4, 3 + or - 0.7, 10 + or - 3, and 14 + or - 4 ppbv at altitudes of 17, 20, 25, and 28 km, respectively.
Aimedieu Patrick
Benbrook James R.
Kondo Yoshihiko
Matthews Andrew W.
Sheldon William R.
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