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

How does downward planetary wave coupling affect polar stratospheric ozone in the Arctic winter stratosphere? By S.W. Lubis et al. in Atmospheric Chemistry and Physics.

Strato-mesospheric carbon monoxide profiles above Kiruna, Sweden (67.8 ° N, 20.4 ° E), since 2008. By N.J. Ryan et al. in Earth System Science Data.

Trend and recovery of the total ozone column in South America and Antarctica. By R. Toro et al. in Climate Dynamics.

Impact of a moderate volcanic eruption on chemistry in the lower stratosphere: balloon-borne observations and model calculations. By G. Berthet et al. in Atmospheric Chemistry and Physics.

Decadal predictability without ocean dynamics. By A. Srivastava and T. DelSole in Proceedings of the National Academy of Sciences of the United States of America.

Long-lived contrails and convective cirrus above the tropical tropopause. By U. Schumann et al. in Atmospheric Chemistry and Physics.

Evaluation of the Ozone Fields in NASA’s MERRA-2 Reanalysis. By K. Wargan et al. in the Journal of Climate.

Development of a self-consistent lightning NOx simulation in large-scale 3-D models. By C. Luo et al. in the Journal of Geophysical Research: Atmospheres.

Robustness of the simulated tropospheric response to ozone depletion. By W.J.M Seviour et al. in the Journal of Climate.

Discussion papers – open for comment

Response of Trace Gases to the Disrupted 2015–2016 Quasi-Biennial Oscillation. By O.V. Tweedy et al. in Atmospheric Chemistry and Physics Discussions.

Validation of 10-year SAO OMI Ozone Profile (PROFOZ) Product Using Ozonesonde Observations. By G. Huang et al. in Atmospheric Measurement Techniques Discussions.

Validation of meteorological analyses and trajectories in the Antarctic lower stratosphere using Concordiasi superpressure balloon observations. By L. Hoffmann et al. in Atmospheric Chemistry and Physics Discussions.