Surface warming patterns drive tropical rainfall pattern responses to CO2 forcing on all timescales
Article first published online: 21 JAN 2014
©2013. American Geophysical Union. All Rights Reserved.
Geophysical Research Letters
Volume 41, Issue 2, pages 610–615, 28 January 2014
How to Cite
2014), Surface warming patterns drive tropical rainfall pattern responses to CO2 forcing on all timescales, Geophys. Res. Lett., 41, 610–615, doi:10.1002/2013GL058504., , , and (
- Issue published online: 3 MAR 2014
- Article first published online: 21 JAN 2014
- Accepted manuscript online: 9 DEC 2013 01:33AM EST
- Manuscript Revised: 4 DEC 2013
- Manuscript Accepted: 4 DEC 2013
- Manuscript Received: 28 OCT 2013
- climate change;
Mechanisms behind regional tropical rainfall responses to CO2 forcing are examined in idealized climate model experiments, traceable to transient forcing scenarios. As previously shown, the pattern of the first-year response of dynamical precipitation change to an abrupt CO2 increase is similar to the century-scale response. It is demonstrated here that this similarity is driven by surface temperature pattern change, not a direct atmospheric circulation response to CO2. This confirms the “Warmer get Wetter” hypothesis, which emphasizes the role of sea surface temperature pattern change in driving regional tropical precipitation change. Future regional rainfall changes should thus be studied primarily in coupled ocean-atmosphere models.