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

Transport of ice into the stratosphere and the humidification of the stratosphere over the 21st century. By A.E. Dessler et al. in Geophysical Research Letters.

The double peak in upwelling and heating in the tropical lower stratosphere. By A. Ming et al. in the Journal of the Atmospheric Sciences.

Improved simulation of tropospheric ozone by a global-multi-regional two-way coupling model system. By Y. Yan et al. in Atmospheric Chemistry and Physics.

Sensitivity of Thin Cirrus Clouds in the Tropical Tropopause Layer to Ice Crystal Shape and Radiative Absorption. By R.D. Russotto et al. in the Journal of Geophysical Research: Atmospheres.

Continued emissions of carbon tetrachloride from the United States nearly two decades after its phaseout for dispersive uses. By L. Hu et al. in the Proceedings of the National Academy of Sciences of the United States of America.

Co-ordinated Airborne Studies in the Tropics (CAST). By N.R.P. Harris et al. in the Bulletin of the American Meteorological Society.

Revisiting the relationship between jet position, forced response and annular mode variability in the southern mid-latitudes. By I.R. Simpson and L.M. Polvani. in Geophysical Research Letters.

Impacts of Interactive Stratospheric Chemistry on Antarctic and Southern Ocean Climate Change in the Goddard Earth Observing System – Version 5 (GEOS-5). By F. Li et al. in the Journal of Climate.

Sensitivity of the surface responses of an idealized AGCM to the timing of imposed ozone depletion-like polar stratospheric cooling. By A. Sheshadri and A. Plumb in Geophysical Research Letters.

11-year Solar Cycle Signal in the NAO and Atlantic / European Blocking. By L.J. Gray et al. in the Quarterly Journal of the Royal Meteorological Society.

Simulated long-term climate response to idealized solar geoengineering. By L. Cao et al. in Geophysical Research Letters.

Interannual variability in effective diffusivity in the upper troposphere / lower stratosphere from reanalysis data. By M. Abalos et al. in the Quarterly Journal of the Royal Meteorological Society.

Transport pathways from the Asian monsoon anticyclone to the stratosphere. By H. J. Garny and W. Randel in Atmospheric Chemistry and Physics.

The role of planetary waves in the tropospheric jet response to stratospheric cooling. By K.L. Smith and R.K. Scott in Geophysical Research Letters.

Evaluation of the ACCESS – chemistry–climate model for the Southern Hemisphere. By K.A. Stone et al. in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

Chemical analysis of refractory stratospheric aerosol particles collected within the arctic vortex and inside polar stratospheric clouds. By M. Ebert et al. in Atmospheric Chemistry and Physics Discussions.