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ESD | Articles | Volume 10, issue 4
Earth Syst. Dynam., 10, 885–900, 2019
https://doi.org/10.5194/esd-10-885-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Earth Syst. Dynam., 10, 885–900, 2019
https://doi.org/10.5194/esd-10-885-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 13 Dec 2019

Research article | 13 Dec 2019

Climate system response to stratospheric sulfate aerosols: sensitivity to altitude of aerosol layer

Krishna-Pillai Sukumara-Pillai Krishnamohan et al.

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Cited articles

Alados, I. and Alados-Arboledas, L.: Direct and diffuse photosynthetically active radiation: Measurements and modeling, Agr. Forest Meteorol., 93, 27–38, https://doi.org/10.1016/S0168-1923(98)00107-5, 1999. 
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Aquila, V., Garfinkel, C. I., Newman, P. A., Oman, L. D., and Waugh, D. W.: Modifications of the quasi-biennial oscillation by a geoengineering perturbation of the stratospheric aerosol layer, Geophys. Res. Lett., 41, 1738–1744, https://doi.org/10.1002/2013GL058818, 2014. 
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We find that sulfate aerosols are more effective in cooling the climate system when they reside higher in the stratosphere. We explain this sensitivity in terms of radiative forcing at the top of the atmosphere. Sulfate aerosols heat the stratospheric layers, causing an increase in stratospheric water vapor content and a reduction in high clouds. These changes are larger when aerosols are prescribed near the tropopause, offsetting part of the aerosol-induced negative radiative forcing/cooling.
We find that sulfate aerosols are more effective in cooling the climate system when they reside...
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