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

Advancements, measurement uncertainties, and recent comparisons of the NOAA frost point hygrometer. By E.G. Hall et al. in Atmospheric Measurement Techniques.

In situ and space-based observations of the Kelud volcanic plume: The persistence of ash in the lower stratosphere. By J.-P. Vernier et al. in the Journal of Geophysical Research: Atmospheres.

Lessened response of boreal winter stratospheric polar vortex to El Niño in recent decades. By J. Hu et al. in Climate Dynamics.

The effect of representing bromine from VSLS on the simulation and evolution of Antarctic ozone. By L.D. Oman et al. in Geophysical Research Letters.

Evaluation of water vapour assimilation in the tropical upper troposphere and lower stratosphere by a chemical transport model. By S. Payra et al. in Atmospheric Measurement Techniques.

Effects of a warming Arctic. By T.G. Shepherd in Science.

Infrared limb emission measurements of aerosol in the troposphere and stratosphere. By S. Griessbach et al. in Atmospheric Measurement Techniques.

The dynamics of mesoscale winds in the upper troposphere and lower stratosphere. By J. Callies et al. in the Journal of the Atmospheric Sciences.

Uncertainty budgets of major ozone absorption cross sections used in UV remote sensing applications. By M. Weber et al. in Atmospheric Measurement Techniques.

Recent divergences in stratospheric water vapor measurements by frost point hygrometers and the Aura Microwave Limb Sounder. By D.F. Hurst et al. in Atmospheric Measurement Techniques.

Discussion papers – open for comment

Antarctic Ozone Depletion between 1960 and 1980 in Observations and Chemistry-Climate Model Simulations. By U. Langematz et al. in Atmospheric Chemistry and Physics Discussions.

A decadal satellite record of gravity wave activity in the lower stratosphere to study polar stratospheric cloud formation. By L. Hoffmann et al. in Atmospheric Chemistry and Physics Discussions.

Wave Modulation of the Extratropical Tropopause Inversion Layer. By R. Pilch Kedzierski et al. in Atmospheric Chemistry and Physics Discussions.

Evaluation and Error Apportionment of an Ensemble of Atmospheric Chemistry Transport Modelling Systems: Multi-variable Temporal and Spatial Breakdown. By E. Solazzo et al. in Atmospheric Chemistry and Physics Discussions.