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

Modification of the gravity wave parameterization in the Whole Atmosphere Community Climate Model: Motivation and results. By R.R. Garcia et al. in the Journal of the Atmospheric Sciences.

HF Radar Observations of a Quasi Biennial Oscillation in Mid-Latitude Mesospheric Winds. By G. Malhotra et al. in the Journal of Geophysical Research: Atmospheres.

Geoengineering with stratospheric aerosols: What don’t we know after a decade of research? By D.G. MacMartin et al. in Earth’s Future.

Nonlinear response of mid-latitude weather to the changing Arctic. By J.E. Overland et al. in Nature Climate Change.

Decadal variability of European sea level extremes in relation to the solar activity. By A. Martinez-Asensio et al. in Geophysical Research Letters.

A comparison of very short lived halocarbon (VSLS) and DMS aircraft measurements in the tropical west Pacific from CAST, ATTREX and CONTRAST. By S.J. Andrews et al. in Atmospheric Measurement Techniques.

Discussion papers – open for comment

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

Impact of typhoons on the composition of the upper troposphere within the Asian summer monsoon anticyclone: the SWOP campaign in Lhasa 2013. By D. Li et al. in Atmospheric Chemistry and Physics Discussions.

Global large-scale stratosphere-troposphere exchange in modern reanalyses. By A.C. Boothe and C.R. Homeyer in Atmospheric Chemistry and Physics Discussions.

Stratospheric Variability at a glance – Analysis of the intra decadal timescale and the QBO. By D. Cai et al. in Atmospheric Chemistry and Physics Discussions.