A selection of new science articles from the past week of interest to the SPARC community (a SPARC Office choice).

Harnessing stratospheric diffusion barriers for enhanced climate geoengineering. By N.O. Aksamit et al., in Atmospheric Chemistry and Physics.

Anomalous changes of temperature and ozone QBOs in 2015−2017 from radiosonde observation and MERRA-2 reanalysis. By X. Bai et al., in Earth and Planetary Physics.

Differences in the quasi-biennial oscillation response to stratospheric aerosol modification depending on injection strategy and species. By H. Franke, U. Niemeier, and D. Visioni in Atmospheric Chemistry and Physics.

Persistent model biases in the CMIP6 representation of stratospheric polar vortex variability. By R.J. Hall et al., in the Journal of Geophysical Research: Atmospheres.

Unknown eruption source parameters cause large uncertainty in historical volcanic radiative forcing reconstructions. By L.R. Marshall et al. in the Journal of Geophysical Research: Atmospheres.