Measurements of the stratospheric carbon dioxide concentration over Japan using a balloon-borne cryogenic sampler

Details Measurements of the stratospheric carbon dioxide concentration over Japan using a balloon-borne cryogenic sampler Measurements of the stratospheric carbon dioxide concentration over Japan using a balloon-borne cryogenic sampler

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22.1229n&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 10, p. 1229-1232

Physics

20

Abundance, Carbon Dioxide, Density (Number/Volume), Japan, Secular Variations, Spatial Distribution, Stratosphere, Air Sampling, Altitude, Balloon-Borne Instruments, Transport Properties, Vertical Distribution

Scientific paper

Stratospheric air samples have been collected once per year since 1985 over Japan using a balloon-borne cryogenic sampler and then analyzed for their CO2 concentrations. The measurements showed high values of CO2 in the lowest part of the stratosphere, then a decrease with height to 20.0-25.0 km, almost constant values above this level. From the comparison with the results of our aircraft measurements in the upper troposphere and lower stratosphere, it is suggested that the vertical profile of stratospheric CO2 over Japan is strongly related to transport processes that are associated with tropospheric air being introduced into the stratosphere in the tropical region and then moving poleward with different speeds at different heights. The average rate of the CO2 increase from 1985 to 1991 was estimated to be 1.4 ppmv/year; this is similar to the rate found for the troposphere over the same period.

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