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Effects of solution mass transport on the ECC ozonesonde background current
Author(s) -
Thornton Donald C.,
Niazy Nagla
Publication year - 1983
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl010i002p00148
Subject(s) - current (fluid) , troposphere , environmental science , atmospheric sciences , ozone , atmospheric pressure , mass transport , physics , meteorology , thermodynamics , engineering physics
When the electrochemical concentration cell (ECC) ozonesonde exhibits a background current at the time of balloon launch, the measured cell current must be corrected to obtain the actual ozone response. We have found a pressure dependent factor in the background current that originates in a convective mass transport parameter. For atmospheric pressures greater than 100 mb, the mass transport parameter is constant, but at pressures less than 100 mb it declines logarithmically with pressure. We suggest that the background current correction is directly correlated to the mass transport parameter pressure dependence. Compared to a constant background current, the presently used background current correction based on the oxygen partial pressure leads to an overestimate of the integrated ozone value in the troposphere for the ECC ozonesonde data.