Obtaining comprehensive information on the chemical composition of atmospheric particles is challenging because no single method of analytical chemistry can provide the full range of needed information. ...speakers discussed multimodal applications of complementary analytical methods in a context of providing comprehensive information ranging from microscopy-level details of individual particles to advanced molecular characterization of complex molecules that form particulate matter. ...presenters emphasized that future climate models would need to include dynamic evolution of aerosol composition and properties for improved predictions of their atmospheric and climate impact. ...examples of recent knowledge advances derived from laboratory studies demonstrated the types of cutting-edge studies that can be conducted in simulation chambers. With the help of modeling results, presenters demonstrated sensitivity of direct radiative effects to hygroscopic growth of aerosols, impacts of photolysis rates on gas-phase chemistry, historical trends in aerosol emissions, and radiative forcing by black and brown carbon.