How will changes in carbon dioxide and methane modify the mean structure of the mesosphere and thermosphere?
Article first published online: 7 DEC 2012
Copyright 1989 by the American Geophysical Union.
Geophysical Research Letters
Volume 16, Issue 12, pages 1441–1444, December 1989
How to Cite
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 5 OCT 1989
- Manuscript Received: 14 SEP 1989
A global average model of the coupled mesosphere, thermosphere and ionosphere is used to examine the effect of trace gas variations on the overall structure of these regions. In particular, the variations caused by CO2 and CH4 doublings and halvings from present day mixing ratios are presented. The results indicate that the mesosphre and thermosphere temperatures will cool by about 10K and 50K respectively as the CO2 and CH4 mixing ratios are doubled. These regions are heated by similar amounts when the trace gas mixing ratios are halved. Compositional redistributions also occur in association with changes in the temperature profile. The results show that global change will occur in the upper atmosphere and ionosphere as well as in the lower atmosphere during the 21st century.