Scientists have long been aware that many substances released into the atmosphere by human activities serve as both climate change agents and air pollutants. However, the complex interactions of these substances—involving non-linear interactions and complex chemical reactions—make predicting how the atmospheric system will respond to changes in emissions difficult. Changes in a single component in the atmosphere can lead to significantly different interactions that can alter the behavior of the entire system.
PEGASOS, using in-depth analysis of observational data and modeling, is intended to quantify the magnitude of regional to global feedbacks between atmospheric chemistry and climate change. The project will also try to develop ways to improve air quality while limiting the negative impacts those changes could have on the broader problem of climate change.
As PEGASOS develops an improved representation of atmospheric chemistry and aerosol formation, IIASA researchers, using the GAINS-Europe model, will employ those insights to develop emission control strategies that create win-win solutions for climate change, short-term climate forcing, health impacts and mitigation costs.
Last edited: 14 August 2012
International Institute for Applied Systems Analysis (IIASA)
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