The distribution of carbon monoxide and ozone in the free troposphere

The two-dimensional distributions of CO and O3 in the free troposphere during July and August, 1974, are discussed. The data confirm the previous findings that both of these gases are considerably more abundant in the northern hemisphere, but the degree of the asymmetry is somewhat different from what had been reported previously, especially for CO. When examined with respect to other available data sets, the conclusion is drawn that a pronounced seasonal cycle exists for CO in both hemispheres which may be driven by the likely seasonal cycle of the OH radical. The data also indicate that CO concentrations exhibit significant variability with height in the northern hemisphere, whereas southern hemispheric concentrations are quite constant with altitude except in cases where interhemispheric exchange of air may be occurring. A discussion on the vertical and horizontal transport processes inferred from the CO and O3 measurements is presented. The possible interdependence of the photochemical cycles of these two trace gases is also discussed.

[1]  D. Davis,et al.  Free tropospheric/boundary‐layer airborne measurements of H2O over the latitude range of 58°S to 70°N: Comparison with simultaneous ozone and carbon monoxide measurements , 1980 .

[2]  J. W. Drummond,et al.  Nitric oxide measurements in the equatorial Pacific region , 1979 .

[3]  F. Hanser,et al.  Variations of O(1 D) photoproduction rate for the 1977 Gametag flights , 1980 .

[4]  R. Chatfield,et al.  Tropospheric ozone: 2. Variations along a meridional band , 1977 .

[5]  P. Crutzen,et al.  Latitudinal distributions of CO and CH4 over the Pacific , 1980 .

[6]  D. Stedman,et al.  Tropospheric ozone: Coupling transport and photochemistry , 1977 .

[7]  U. Schmidt.  The latitudinal and vertical distribution of molecular hydrogen in the troposphere , 1978 .

[8]  Wolfgang Seiler,et al.  Carbon monoxide in the atmosphere , 1970 .

[9]  W. Seiler,et al.  Decrease of the carbon monoxide mixing ratio at the tropopause , 1972 .

[10]  I. Galbally,et al.  Destruction of ozone at the earth's surface , 1980 .

[11]  V. Mohnen,et al.  Project dustorm report: ozone transport, in situ measurements, and meteorological analyses of tropopause folding , 1977 .

[12]  Wolfgang Seiler,et al.  The cycle of atmospheric CO. , 1974 .

[13]  C. Junge.  Residence time and variability of tropospheric trace gases , 1974 .

[14]  P. Crutzen,et al.  Estimates on the production of CO and H2 from the oxidation of hydrocarbon emissions from vegetation , 1978 .

[15]  H. Dütsch.  Photochemistry Of Atmospheric Ozone , 1971 .

[16]  P. Crutzen,et al.  Observational and theoretical evidence in support of a significant in‐situ photochemical source of tropospheric ozone , 1979 .

[17]  G. Boer,et al.  An estimate of the interhemispheric transfer of carbon monoxide from tropical general circulation data , 1974 .

[18]  J. W. Kidson,et al.  Interhemispheric mass exchange from meteorological and trace substance observations , 1969 .

[19]  P. Crutzen,et al.  Biomass burning as a source of atmospheric gases CO, H2, N2O, NO, CH3Cl and COS , 1979, Nature.

[20]  D. Davis,et al.  Free tropospheric and boundary‐layer airborne measurements of ozone over the latitude range of 58°S to 70°N , 1980 .

[21]  Paul J. Crutzen,et al.  The origin of ozone in the troposphere , 1978, Nature.

[22]  P. Crutzen,et al.  Biomass burning as a source of atmospheric gases , 1979 .

[23]  E. Danielsen,et al.  Stratospheric-Tropospheric Exchange Based on Radioactivity, Ozone and Potential Vorticity , 1968 .

[24]  W. Seiler,et al.  Simultaneous presence of O3 and CO bands in the troposphere , 1980 .

[25]  R. C. Robbins,et al.  ATMOSPHERIC BACKGROUND CONCENTRATIONS OF CARBON MONOXIDE * , 1970, Annals of the New York Academy of Sciences.

[26]  A. D. Belmont,et al.  Ozone Concentration by Latitude, Altitude, and Month, Near 80 W , 1977 .

[27]  P. Crutzen.  Photochemical reactions initiated by and influencing ozone in unpolluted tropospheric air , 1974 .

[28]  S. Wofsy,et al.  Natural Sources of Atmospheric CO , 1971, Nature.