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Volume 15, issue 7
Atmos. Chem. Phys., 15, 3739–3754, 2015
https://doi.org/10.5194/acp-15-3739-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 15, 3739–3754, 2015
https://doi.org/10.5194/acp-15-3739-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

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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Cited articles

Al-Saadi, J. A., Pierce, R. B., Fairlie, T. D., Kleb, M. M., Eckman, R. S., Grose, W. L., Natarajan, M., and Olsen, J. R.: Response of middle atmosphere chemistry and dynamics to volcanically elevated sulfate aerosol: three-dimensional coupled model simulations, J. Geophys. Res., 106, 27255–27275, 2001.
Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle atmosphere dynamics, Academic Press, Inc., Orlando, Florida, 489 pp., 1987.
Baldwin, M. P. and Dunkerton, T. J.: Biennial, quasi-biennial, and decadal oscillations of potential vorticity in the northern stratosphere, J. Geophys. Res., 103, 3919–3928, 1998.
Birner, T. and Bönisch, H.: Residual circulation trajectories and transit times into the extratropical lowermost stratosphere, Atmos. Chem. Phys., 11, 817–827, https://doi.org/10.5194/acp-11-817-2011, 2011.
Bönisch, H., Engel, A., Birner, Th., Hoor, P., Tarasick, D. W., and Ray, E. A.: On the structural changes in the Brewer–Dobson circulation after 2000, Atmos. Chem. Phys., 11, 3937–3948, https://doi.org/10.5194/acp-11-3937-2011, 2011.
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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.
Time series of the satellite-observed stratospheric tracer, CH4, are analyzed to see whether...
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