SPARC Science Update: 6-12 August

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

Which way will the circulation shift in a changing climate? Possible nonlinearity of extratropical cloud feedbacks. By N.F. Tandon and M.A. Cane in Climate Dynamics.

Investigations of the middle atmospheric thermal structure and oscillations over sub-tropical regions in the Northern and Southern Hemispheres. By S. Sharma et al. in Climate Dynamics.

Role of atmospheric chemistry in the climate impacts of stratospheric volcanic injections. By A.N. LeGrande et al. in Nature Geoscience.

A short-term negative eddy feedback on mid-latitude jet variability due to planetary wave reflection. By G. Rivière et al. in the Journal of the Atmospheric Sciences.

The relationship between age of air and the diabatic circulation of the stratosphere. By M. Linz et al. in the Journal of the Atmospheric Sciences.

The anomalous change in the QBO in 2015-16. By P.A. Newman et al. in Geophysical Research Letters.

The representation of solar cycle signals in stratospheric ozone – Part 1: A comparison of recently updated satellite observations. By A.C. Maycock et al. in Atmospheric Chemistry and Physics.

Satellite observations of middle atmosphere gravity wave absolute momentum flux and of its vertical gradient during recent stratospheric warmings. By M. Ern et al. in Atmospheric Chemistry and Physics.

A multi-wavelength classification method for polar stratospheric cloud types using infrared limb spectra. By R. Spang et al. in Atmospheric Measurement Techniques.

A probabilistic study of the return of stratospheric ozone to 1960 levels. By A. Helena Södergren et al. in Geophysical Research Letters.

Interhemispheric differences in seasonal cycles of tropospheric ozone in the marine boundary layer: observation – model comparisons. By R.G: Derwent et al. in the Journal of Geophysical Research: Atmospheres.

LOAC: a small aerosol optical counter/sizer for ground-based and balloon measurements of the size distribution and nature of atmospheric particles – Part 2: First results from balloon and unmanned aerial vehicle flights. By J.-B. Renard et al. in Atmospheric Measurement Techniques.

Glider aims to break world record — and boost climate science. By D. Butler in Nature.

Changes in the width of the tropical belt due to simple radiative forcing changes in the GeoMIP simulations. By N.A. Davis et al. in Atmospheric Chemistry and Physics.

A joint data record of tropospheric ozone from Aura-TES and MetOp-IASI. By H. Oetjen et al. in Atmospheric Chemistry and Physics.

Features of vortex split MSSWs that are problematic to forecast. By M. Taguchi in Atmospheric Science Letters.

Seasonal and inter-annual variability of lower stratospheric age of air spectra. By F. Ploeger and T. Birner in Atmospheric Chemistry and Physics.

Discussion papers – open for comment

Halogen chemistry reduces tropospheric O3 radiative forcing. By T Sherwen et al. in Atmospheric Chemistry and Physics Discussions.

Shortwave radiative forcing and feedback to the surface by sulphate geoengineering: Analysis of the Geoengineering Model Intercomparison Project G4 scenario. By H. Kashimura et al. in Atmospheric Chemistry and Physics Discussions.