This paper reanalyzes the measurements of the D content in tropospheric water vapor by Ehhalt (1974) correcting for the isotopic contamination by wall water in the sampling tubes. The resulting corrections decrease the original D content. They are small for the data from the flights through 1967, which extended from the surface to 9 km altitude, but are large for the flights beginning 1971, which ranged from 6 to 13 km altitude and collected smaller amounts of water vapor. No correction therefore was atte…
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