Articles | Volume 20, issue 21
Atmos. Chem. Phys., 20, 13267–13282, 2020
Atmos. Chem. Phys., 20, 13267–13282, 2020

Research article 10 Nov 2020

Research article | 10 Nov 2020

The response of stratospheric water vapor to climate change driven by different forcing agents

Xun Wang and Andrew E. Dessler

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Subject: Gases | Research Activity: Atmospheric Modelling | Altitude Range: Stratosphere | Science Focus: Physics (physical properties and processes)
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Revised manuscript accepted for ACP
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Cited articles

Adams, B. K. and Dessler, A. E.: Estimating Transient Climate Response in a Large-Ensemble Global Climate Model Simulation, Geophys. Res. Lett., 46, 311–317,, 2019. 
Allen, R. J., Amiri-Farahani, A., Lamarque, J.-F., Smith, C., Shindell, D., Hassan, T., and Chung, C. E.: Observationally constrained aerosol–cloud semi-direct effects, npj Clim. Atmos. Sci., 2, 16,, 2019. 
Arora, V. K., Scinocca, J. F., Boer, G. J., Christian, J. R., Denman, K. L., Flato, G. M., Kharin, V. V., Lee, W. G., and Merryfield, W. J.: Carbon emission limits required to satisfy future representative concentration pathways of greenhouse gases, Geophys. Res. Lett., 38, L05805,, 2011. 
Banerjee, A., Chiodo, G., Previdi, M., Ponater, M., Conley, A. J., and Polvani, L. M.: Stratospheric water vapor: an important climate feedback, Clim. Dynam., 53, 1697–1710,, 2019. 
Bellouin, N., Rae, J., Jones, A., Johnson, C., Haywood, J., and Boucher, O.: Aerosol forcing in the Climate Model Intercomparison Project (CMIP5) simulations by HadGEM2-ES and the role of ammonium nitrate, J. Geophys. Res., 116, D20206,, 2011. 
Short summary
We investigate the response of stratospheric water vapor (SWV) to different forcing agents, including greenhouse gases and aerosols. For most forcing agents, the SWV response is dominated by a slow response, which is coupled to surface temperature changes and exhibits a similar sensitivity to the surface temperature across all forcing agents. The fast SWV adjustment due to forcing is important when the forcing agent directly heats the cold-point region, e.g., black carbon.
Final-revised paper