Accuracy of ozonesonde measurements in the troposphere |
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| Authors: | S J Reid G Vaughan A R W Marsh H G J Smit |
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| Institution: | (1) Physics Department, University of Wales, SY23 3BZ Aberystwyth, Wales, U.K.;(2) Atmospheric Chemistry Research Unit, Imperial College, Silwood Park, Ascot, U.K.;(3) Institut für Chemie der Belasteten Atmosphäre (ICG-2), Forschungszentrum Jülich, PO Box 1913, 52425 Jülich, Germany |
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| Abstract: | Measurements of atmospheric ozone at concentrations typical of the free troposphere have been compared for ECC sondes and a UV-absorption photometer, using a Bendix chemiluminescent analyser as a transfer standard. Comparisons were conducted in the laboratory and in the tropospheric part of the atmosphere. It was found that the measurements agreed to within 4% provided that the background current for the ECC sonde was measured before exposure to ozone in the preparation procedure, and was assumed to be constant throughout the sonde flight. These results confirm those of earlier experiments and mean that the methods currently used to correct for the background current in the troposphere need to be revised. |
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| Keywords: | ECC ozone troposphere Bendix intercomparison |
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