Simultaneous measurements of stratospheric HOx, NOx, and Cl-x: Comparison with a photochemical model

被引:45
作者
Chance, K
Traub, WA
Johnson, DG
Jucks, KW
Ciarpallini, P
Stachnik, RA
Salawitch, RJ
Michelsen, HA
机构
[1] CALTECH, JET PROP LAB, PASADENA, CA 91109 USA
[2] HARVARD UNIV, DEPT EARTH & PLANETARY SCI, CAMBRIDGE, MA 02138 USA
关键词
D O I
10.1029/96JD00064
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
We report simultaneous measurements of the stratospheric concentration profiles of OH, HO2, H2O2, H2O, O-3, HNO3, NO2, N2O, HCl, HOCl, and ClO during a midlatitude balloon flight in 1989. Measurements were made over almost an entire diurnal cycle by the Smithsonian Astrophysical Observatory Far-Infrared Spectrometer (FIRS-2) and the Jet Propulsion Laboratory Balloon Microwave Limb Sounder (BMLS). We analyze these measurements using a photochemical model constrained by observations of long-lived gases. Measured HO, species (OH and HO2) and H2O2 show fair agreement with theory throughout the diurnal cycle. Measurements of HNO3 are higher than theory near the concentration peak, while the levels of NO2 are consistent with the model at most altitudes. Measurements of ClO and HOCl are less than predicted concentrations, suggesting a source of HCl in addition to the reaction of Cl with CH4. Possibilities for such a source include a minor HCl + O-2 product channel for the reaction of ClO with OH and a minor HCl + O-3 channel for the reaction of ClO with HO2.
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页码:9031 / 9043
页数:13
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