Aerosol and Climate

Atmospheric aerosol exerts a forcing on climate by directly reflecting or absorbing the solar radiation and by impacting cloud properties (IPCC AR5 2013). STOPPER has  a long-standing experience in aerosol-climate interactions. Specific research targets are: a) the effect of new-particle formation on cloud condensation nuclei (CCN) and ice condensation nuclei (IN) levels, b) the role of secondary aerosol compounds in enhancing particulate matter concentrations and particle hygroscopicity in background areas, c) the contribution of light-absorbing organic species ("brown carbon") to solar light extinction, d) the atmospheric chemical processes modulating the concentrations of aerosols at high altitudes and in polar regions. Research activities involve modelling and observations from the molecular to the global scale.