Stratospheric Aerosols

Heterogenous Reaction of Stratospheric Aerosols

We are interested in understanding the heterogeneous reaction and uptake rates of stratospheric aerosols that affect stratospheric chemistry and dynamics. For this, we measure reaction kinetics in an aerosol flow tube under stratospheric temperatures.

Chemical imaging of stratospheric aerosol samples

Using different chemical imaging techniques, such as SEM-EDX and STXM/NEXFAS, we are interested in improving the understanding of carbonaceous components in stratospheric aerosols. We aim to address their elemental composition, morphology, and surface chemical properties, to determine their radiative and chemical impacts.

Stratospheric Aerosol Radiative Forcing

Organics have long been disregarded for stratospheric aerosols, although aircraft studies have shown that they account for 5-50% of particle mass in the lower stratosphere. We investigated the composition dependence of stratospheric aerosol radiative forcing, with a specific focus on the refractive index of organics and their mixing states with ubiquitous sulfuric acid. (Li et al., GRL, 2021)

SOCOL-AERv2 Simulation of Stratospheric Aerosol

We use the SOCOL-AERv2 coupled aerosol-chemistry-climate model to study the impacts of perturbations to the stratosphere such as volcanic eruptions or stratospheric aerosol injection.