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

Tropospheric ozonesonde profiles at long-term U.S. monitoring sites: 1. A climatology based on self-organizing maps. By R.M. Stauffer et al. in the Journal of Geophysical Research: Atmospheres.

Effects of sulfate aerosol forcing on East Asian summer monsoon for 1985-2010. By M.J. Kim et al. in Geophysical Research Letters.

Contrasting fast precipitation responses to tropospheric and stratospheric ozone forcing. By C.R. Macintosh et al. in Geophysical Research Letters.

A nudged chemistry–climate model simulation of chemical constituent distribution at northern high–latitude stratosphere observed by SMILES and MLS during the 2009/2010 stratospheric sudden warming. By H. Akiyoshi et al. in the Journal of Geophysical Research: Atmospheres.

On the emissions and transport of bromoform: sensitivity to model resolution and emission location. By M.R. Russo et al. in Atmospheric Chemistry and Physics.

Validation of MIPAS IMK/IAA methane profiles. By A. Laeng et al. in Atmospheric Measurement Techniques.

Observational uncertainty of Arctic sea-ice concentration significantly affects seasonal climate forecasts. By F. Bunzel et al. in Geophysical Research Letters.

The importance of the Montreal Protocol in mitigating the potential intensity of tropical cyclones. By L.M. Polvani et al. in the Journal of Climate.

The seasonally varying effect of the Tibetan Plateau on Northern Hemispheric blocking frequency and amplitude. By K.-S. Yun et al. in Climate Dynamics.

Large Amplitude Mesospheric Response to an Orographic Wave Generated Over the Southern Ocean Auckland Islands (50.7°S) During the DEEPWAVE Project. By P.-D. Pautet et al. in the Journal of Geophysical Research: Atmospheres.

Advancing polar prediction capabilities on daily to seasonal time scales. By T. Jung et al. in the Bulletin of the American Meteorological Society.

Effect of gravity wave temperature fluctuations on homogeneous ice nucleation in the tropical tropopause layer. By T. Dinh et al. in Atmospheric Chemistry and Physics.