News 28.1.2022

Assessments of effectiveness of climate modification depend on how fine particulate matter is modelled

A study has modelled various strategies for injecting sulphur particles into the stratosphere, where they would reflect sunlight and cool the climate.

Climate model simulations were made using two fine particle models, one of which was developed at the Finnish Meteorological Institute. The simulations produced sharply differing estimates of the ability of particles of sulphur injected into the upper atmosphere to cool the climate.

The results of the study highlight the great uncertainties connected with the effects of climate modification even in matters as basic as the ability of climate modification to cool the climate.

Further information:

Researcher Anton Laakso, Finnish Meteorological Institute, Laakso, A., Niemeier, U., Visioni, D., Tilmes, S., and Kokkola, H.: Dependency of the impacts of geoengineering on the stratospheric sulfur injection strategy – Part 1: Intercomparison of modal and sectional aerosol modules, Atmos. Chem. Phys., 22, 93–118,, 2022. Scientific article is available on Atmospheric Chemistry and Physics.

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