Articles | Volume 15, issue 7
Atmos. Chem. Phys., 15, 3739–3754, 2015
https://doi.org/10.5194/acp-15-3739-2015
Atmos. Chem. Phys., 15, 3739–3754, 2015
https://doi.org/10.5194/acp-15-3739-2015

Research article 07 Apr 2015

Research article | 07 Apr 2015

Methane as a diagnostic tracer of changes in the Brewer–Dobson circulation of the stratosphere

E. E. Remsberg

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Short summary
Time series of the satellite-observed stratospheric tracer, CH4, are analyzed to see whether they indicate a significant trend for the hemispheric Brewer--Dobson circulation (BDC) for 1992-2005. Trends in CH4 for the lower stratosphere are generally positive and equivalent to those of the troposphere. However, the Northern Hemisphere BDC is clearly accelerated in the mid-stratosphere (20 to 7hPa). Corresponding trends for the Southern Hemisphere are smaller and less significant.
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