Articles | Volume 16, issue 8
https://doi.org/10.5194/acp-16-5139-2016
https://doi.org/10.5194/acp-16-5139-2016
Research article
 | 
25 Apr 2016
Research article |  | 25 Apr 2016

Investigating the source, transport, and isotope composition of water vapor in the planetary boundary layer

Timothy J. Griffis, Jeffrey D. Wood, John M. Baker, Xuhui Lee, Ke Xiao, Zichong Chen, Lisa R. Welp, Natalie M. Schultz, Galen Gorski, Ming Chen, and John Nieber

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Increasing atmospheric humidity and convective precipitation over land provide evidence of intensification of the hydrologic cycle. We present the first multi-annual isotope (oxygen and deuterium) water vapor observations from a very tall tower (185 m) in the upper Midwest, United States, to diagnose the sources, transport, and fractionation of water vapor in the atmosphere. The results show a relatively high degree of summertime water recycling within the region (~30 % mean and ~60 % maximum).
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