Articles | Volume 18, issue 13
Atmos. Chem. Phys., 18, 9955–9973, 2018
https://doi.org/10.5194/acp-18-9955-2018

Special issue: The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

Atmos. Chem. Phys., 18, 9955–9973, 2018
https://doi.org/10.5194/acp-18-9955-2018

Research article 13 Jul 2018

Research article | 13 Jul 2018

Investigating the yield of H2O and H2 from methane oxidation in the stratosphere

Franziska Frank et al.

Data sets

NCAR Command Language (NCL) UCAR/NCAR/CISL/TDD https://doi.org/10.5065/D6WD3XH5

Model code and software

The highly structured Modular Earth Submodel System (MESSy) German Aerospace Center (DLR) http://www.messy-interface.org

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Short summary
It is frequently assumed that one methane molecule produces two water molecules. Applying various modeling concepts, we find that the yield of water from methane is vertically not constantly 2. In the upper stratosphere and lower mesosphere, transport of intermediate H2 molecules even led to a yield greater than 2. We conclude that for a realistic chemical source of stratospheric water vapor, one must also take other sources (H2), intermediates and the chemical removal of water into account.
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