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

A Method to Determine Gravity Wave Net Momentum Flux, Propagation Direction and “Real” Wavelengths: a GPS Radio Occultations Soundings Case Study. By P. Alexander, T. Schmidt, and A. de la Torre in Earth and Space Science.

Transport variability of very short‐lived substances from the West Indian Ocean to the stratosphere. By A. Fiehn et al. in the Journal of geophysical Research: Atmospheres.

A statistical study of inertia gravity waves in the lower stratosphere over the Arctic region based on radiosonde observations. By K.M. Huang et al. in the Journal of Geophysical Research: Atmosphers.

Sensitivity of the Brewer–Dobson Circulation and Polar Vortex Variability to Parameterized Nonorographic Gravity Wave Drag in a High-Resolution Atmospheric Model. By I. Polichtchouk et al. in the Journal of the Amtospheric Sciences.

Radiative effects of ozone waves on the Northern Hemisphere polar vortex and its modulation by the QBO. By V. Silverman et al. in Atmospheric Chemistry and Physics.

Impact of the ozone monitoring instrument row anomaly on the long-term record of aerosol products. By O. Torres et al. in Atmospheric Measurement Techniques.

Systematic Errors in Weather and Climate Models: Nature, Origins, and Ways Forward. By A. Zadra et al. in the Bulletin of the American Metaorological Society.