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

Fast descent routes from within or near the stratosphere to the surface at Fukuoka, Japan, studied using ⁷Be measurements and trajectory calculations. By H. Ito and Y. Narazaki in Atmospheric Chemistry and Physics.

Limitations of ozone data assimilation with adjustment of NO_x emissions: mixed effects on NO₂ forecasts over Beijing and surrounding areas. By X. Tang et al. in Atmospheric Chemistry and Physics.

The non-Gaussianity and spatial asymmetry of temperature extremes relative to the storm track: the role of horizontal advection. By C.I. Garfinkel and N. Harnik in the Journal of Climate.