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

Causes of climate change over the historical record. By G.C. Hegerl et al. in the Environmental Research Letters.

Wintertime North American Weather Regimes and the Arctic Stratospheric Polar Vortex. By S.H. Lee, J.C. Furtado, and A.J. Charlton-Perez in the Geophysical Research Letters.

Observed Sub‐Decadal Variations of European Summer Temperatures. By W.A. Müller, L. Borchert, and R. Ghosh in the Geophysical Research Letters.

Interannual Variation of Upper Stratospheric Ozone in the Northern Midlatitudes in Early Winter Caused by Planetary Waves. By H. Ohyama et al. in the Journal of Geophysical Research: Atmospheres.

How does knowledge of atmospheric gravity waves guide their parameterizations? By R. Plougonven et al. in the Quarterly Journal of the Royal Meteorological Society.