Skip to content

The impact of anthropogenic chlorine emissions, stratospheric ozone change and chemical feedbacks on stratospheric water

by T Röckmann, J U Grooß, R Müller
Atmospheric Chemistry and Physics ()
Get full text at journal


Mixing ratios of water (H2O) in the stratosphere appear to increase due to increased input of H2O and methane from the troposphere and due to intensified oxidation of CH4 in the stratosphere, but many of the underlying mechanisms are not yet understood. Here we identify and quantify three chemical mechanisms which must have led to more efficient oxidation of CH4 in the stratosphere over the past several decades: 1) The increase in stratospheric chlorine levels due to anthropogenic CFC emissions, 2) the thinning of the stratospheric ozone column and 3) enhanced OH levels in the stratosphere due to increasing H2O levels themselves. In combination with the increase in tropospheric CH4 mixing ratios and with solar cycle related variations of upper stratospheric ozone, these effects can explain about 50% of the additional conversion of CH4 to H2O as observed throughout the stratosphere. The relative contributions from the individual processes have varied over the past decades.

Cite this document (BETA)

Readership Statistics

13 Readers on Mendeley
by Discipline
69% Earth and Planetary Sciences
15% Environmental Science
15% Physics and Astronomy
by Academic Status
31% Professor
31% Researcher
15% Student > Doctoral Student
by Country
15% United Kingdom
8% France
8% United States

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Sign up & Download

Already have an account? Sign in