Correction to “Stratospheric water vapor trends in a coupled chemistry‐climate model”

Abstract

[1] In the paper ‘‘Stratospheric water vapor trends in a coupled chemistry-climate model’’ by W. Tian and M. P. Chipperfield (Geophysical Research Letters, 33, L06819, doi:10.1029/2005GL024675, 2006), in paragraph 17, US was incorrectly written out as United States. Throughout the paper, US refers to upper stratosphere. Paragraph 17 is reproduced correctly here. [2] Overall, the model does reproduce many aspects of observed past H2O increases. Although, part of the modeled LS increase is due to the increase in tropopause T, we can still draw conclusions about the cause of the observed trend. Water vapor trends in the US can be mostly explained by CH4 oxidation while in the LS the trends may be mainly related to exchange of water vapor between troposphere and stratosphere. While the tropopause T change may mainly be responsible for the water vapor trend in the LS, the contribution from the change in the BD circulation and other processes are also important. From our results we can say that reconciling an observed tropopause cooling with increases in LS H2O would require a significant change in transport in the very low stratosphere, unless other mechanisms are invoked [e.g., Sherwood, 2002; Notholt et al., 2005]. GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L09804, doi:10.1029/2006GL026532, 2006