Abstract
Using version 19 Halogen Occultation Experiment (HALOE) data, we estimate the abundance of water vapor entering the stratosphere [H2O]e is 3.80±0.49 ppmv averaged over 1993–1997. The average of all of the recently published estimates of [H2O]e is 3.85 ppmv, which we believe is the best estimate of [H2O]e.
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