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

Technical Note: Reanalysis of upper troposphere humidity data from the MOZAIC programme for the period 1994 to 2009. By H.G. Smit et al. in Atmospheric Chemistry and Physics.

Energetic particle induced inter-annual variability of ozone inside the Antarctic polar vortex observed in satellite data. By T. Fytterer et al. in Atmospheric Chemistry and Physics Discussions.

Gravity waves simulated by high-resolution Whole Atmosphere Community Climate Model. By H.-J. Liu et al. in Geophysical Research Letters.

The hydrological sensitivity to global warming and solar geoengineering derived from thermodynamic constraints. By A. Kleidon et al. in Geophysical Research Letters.

A cautionary note on the use of EESC-based regression analysis for ozone trend studies. By J. Kuttippurath et al. in Geophysical Research Letters.

Regional Structure of the Indian Summer Monsoon in Observations, Reanalysis, and Simulation. By B.A. Cash et al. in the Journal of Climate.

Bromine partitioning in the tropical tropopause layer: implications for stratospheric injection. By R.P. Fernandez et al. in Atmospheric Chemistry and Physics.

Reevaluation of stratospheric ozone trends from SAGE II data using a simultaneous temporal and spatial analysis. By R.P. Damadeo et al. in Atmospheric Chemistry and Physics.

Variability of stratospheric mean age of air and of the local effects of residual circulation and eddy mixing. By F. Ploeger et al. in the Journal of Geophysical Research: Atmospheres.

A review of Stratospheric Sounding Unit radiance observations for climate trends and reanalyses. By J. Nash and R. Saunders in the Quarterly Journal of the Royal Meteorological Society.

Variability and trends in dynamical forcing of tropical lower stratospheric temperatures. By S. Flueglistaler et al. in Atmospheric Chemistry and Physics.

Reference quality upper-air measurements: GRUAN data processing for the Vaisala RS92 radiosonde. By R.J. Dirksen et al. in Atmospheric Measurement Techniques.

Middle-atmospheric zonal and meridional wind profiles from polar, tropical and midlatitudes with the ground-based microwave Doppler wind radiometer WIRA. By R. Rüfenacht et al. in Atmospheric Measurement Techniques.

Intercomparison of stratospheric gravity wave observations with AIRS and IASI. By L. Hoffmann et al. in Atmospheric Measurement Techniques.