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  • GEOPHYSICS  (2)
  • Earth Resources and Remote Sensing
  • 1990-1994  (2)
  • 1
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    The role of chlorine chemistry in Antarctic ozone loss - Implications of new kinetic data (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: New kinetic data yielding a slower formation rate and larger absorption cross sections of Cl2O2 are incorporated into a photochemical model to reassess the role of chlorine chemistry in accounting for the ozone reductions derived from TOMS observations in different regions of the Antarctic polar vortex during 1987. The model is further constrained by existing measurements from the Airborne Antarctic Ozone Experiment and the National Ozone Expedition II. Calculated concentrations of ClO based on the new kinetic data increase by almost a factor of two between the collar and core regions of the vortex during the second half of September. The calculated ozone reductions in the vortex core appear to be consistent with the TOMS observations in spite of the slower rate for the self-reaction of ClO.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 17; 255-258
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Impact of biomass burning on tropospheric CO and OH - A two-dimensional study (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Results are presented from a 2D model of the troposphere and stratosphere which allows the derivation of a budget for CO, as well as the assessment of contributions from different sources in maintaining observed CO concentrations. Attention is given to the results of a time-dependent calculation which evaluates the impact of present-day biomass burning on CO, OH, and CH4, as well as the time constants for the system to respond to changes in the biomass source.
    Keywords: GEOPHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
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