Stratospheric contraction under Climate Intervention by Sulfate Aerosol Injection

Anthropogenic CO₂ emissions cause the Earth's Stratosphere to contract because of radiative cooling of the layer, lowering of the stratopause, heating of the troposphere, and rising of the tropopause.
Stratospheric sulphate aerosol injection (SAI) has been proposed over the years as a potential climate intervention technique to counteract some of the impacts of climate change. Many of the impacts of such interventions on the tropospheric climate have been studied; however, the impacts on the stratosphere are not so well studied.
Here, we present results from model simulations on the impact of SAI on the current trend of stratospheric contraction, using data from the Geoengineering Large Ensemble Project (GLENS). Our results show that in GLENS simulations, SAI can counteract part of the stratosphere contraction while the whole stratosphere moves down.