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

Direct injection of water vapor into the stratosphere by volcanic eruptions. By C.E. Sioris et al. in Geophysical Research Letters.

Gravity-wave effects on tracer gases and stratospheric aerosol concentrations during the 2013 ChArMEx campaign. By F. Chane Ming et al. in Atmospheric Chemistry and Physics.

UV and infrared absorption spectra, atmospheric lifetimes, and ozone depletion and global warming potentials for CCl₂FCCl₂F (CFC-112), CCl₃CClF₂ (CFC-112a), CCl₃CF₃ (CFC-113a), and CCl₂FCF₃ (CFC-114a). By M.E. Davis et al. in Atmospheric Chemistry and Physics.

Regional and Seasonal Stratospheric Temperature Trends in the Last Decade (2002-2014) from AMSU observations. By B.M. Funatsu et al. in the Journal of Geophysical Research: Atmospheres.

The STRatospheric Estimation Algorithm from Mainz (STREAM): estimating stratospheric NO2from nadir-viewing satellites by weighted convolution. By S. Beirie et al. in Atmospheric Measurement Techniques.

North Atlantic summer storm tracks over Europe dominated by internal variability over the past millennium. By M.H. Gagen et al. in Nature Geoscience.

The millennium water vapour drop in chemistry–climate model simulations. By S. Brinkop et al. in Atmospheric Chemistry and Physics.

Quantifying Eddy Feedbacks and Forcings in the Tropospheric Response to Stratospheric Sudden Warmings. By P. Hitchcock and I.R. Simpson in the Journal of Atmospheric Sciences.

Impact of Aerosols on Precipitation from Deep Convective Clouds in Eastern China. By M. Jiang et al. in the Journal of Geophysical Research: Atmospheres.

Hybrid ensemble 4DVar assimilation of stratospheric ozone using a global shallow water model. By D.R. Allen et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

Time varying changes in the simulated structure of the Brewer Dobson Circulation. By C.I. Garfinkel et al. in Atmospheric Chemistry and Physics Discussions.

Derivation of Antarctic stratospheric sulfuric acid profiles and nucleation modeling of the polar stratospheric CN layer. By S. Münch and J. Curtius in Atmospheric Chemistry and Physics Discussions.

The role of methane in projections of 21st century stratospheric water vapour. By L. Revell et al. in Atmospheric Chemistry and Physics Discussions.