2005
DOI: 10.1029/2004jd005593
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Abstract: [1] Different measurements have shown that large water vapor mixing ratios occur in the upper mesosphere in high-latitude summer just under conditions of strongest solar insolation where photolysis should effectively reduce its value. The analysis of this finding by means of a high-resolution one-dimensional model supplies evidence that water vapor is autocatalytically formed below a crossover height of about 65 km and destroyed by photolysis above this altitude. We found three catalytic cycles of water vapor…

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