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

The semiannual oscillation of the tropical zonal wind in the middle atmosphere derived from satellite geopotential height retrievals. By A.K. Smith et al. in the Journal of the Atmospheric Sciences.

Local wave activity budgets of the wintertime Northern Hemisphere: Implication for the Pacific and Atlantic storm tracks. By C.S.Y. Huang and N. Nakamura in Geophysical Research Letters.

Trace gas composition in the Asian summer monsoon anticyclone: a case study based on aircraft observations and model simulations. By K.-D. Gottschaldt et al. in Atmospheric Chemistry and Physics.

The robustness of future changes in Northern Hemisphere blocking: a large ensemble projection with multiple sea surface temperature patterns. By M. Matsueda and H. Endo in Geophysical Research Letters.

In Retrospect: Half a century of robust climate models. By P. Forster in Nature.

Do differences in future sulfate emission pathways matter for near-term climate? A case study for the Asian monsoon. By R.E. Bartlett et al. in Climate Dynamics.

Enhanced stratospheric water vapor over the summertime continental United States and the role of overshooting convection. By R.L. Herman et al. in Atmospheric Chemistry and Physics.

The Impact on the Ozone Layer from NOx Produced by Terrestrial Gamma-ray Flashes. By E.S. Cramer et al. in Geophysical Research Letters.

Discussion papers – open for comment

Impacts of Stratospheric Sulfate Geoengineering on Tropospheric Ozone. By L. Xia et al. in Atmospheric Chemistry and Physics Discussions.

Equatorward dispersion of high-latitude volcanic plume and its relation to the Asian summer monsoon: a case study of the Sarychev eruption in 2009. By X. Wu et al. in Atmospheric Chemistry and Physics Discussions.