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Our research group focuses on investigating how the chemical properties and micro-physics of individual aerosol particles are affected by particle mixing state and aging. We aim to understand the effect of aerosol surface properties and mixing state on initiating and sustaining rainfall (Pöschl et al. 2010, Pöhlker et al. 2012) and on the direct climate forcing of aerosol. We investigate multiphase and heterogeneous reactions taking place on the surface of aerosol particles (Harris et al. 2013) with the purpose of improving global climate model predictions of secondary inorganic (Harris et al. 2013) and secondary organic particle formation (Pöschl et al. 2010).
More recently our research focus has shifted towards quantifying the sources of ozone precursors and aerosol sources over the North West Indo Gangetic plain using various source receptor modeling tools and in-situ observations. We also work towards improving VOC emission inventories over South Asia and quantify the impact of air pollution on crops and natural vegetation using in-situ measurements and stomatal flux based approaches.