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

Record low ozone values over the Arctic in boreal spring 2020. By M. Dameris et al. in Atmospheric Chemistry and Physics.

A methodology for attributing the role of climate change in extreme events: a global spectrally nudged storyline. By L. van Garderen, F. Feser and T.G. Shepherd in Natural Hazards and Earth System Sciences.

Stratospheric ozone and quasi-biennial oscillation (QBO) interaction with the tropical troposphere on intraseasonal and interannual timescales: a normal-mode perspective. By B. Raphaldini et al. in Earth System Dynamics.

Improving ECC Ozonesonde Data Quality: Assessment of Current Methods and Outstanding Issues. By D.W. Tarasick et al. in Earth and Space Science.

Global temperatures in 2020 tied record highs. By P. Voosen in Science.

Discussion papers – open for comment

Orographically-Induced Spontaneous Imbalance within the Jet Causing a Large Scale Gravity Wave Event. By M. Geldenhuys et al. in Atmospheric Chemistry and Physics.

A stratospheric prognostic ozone for seamless Earth System Models: performance, impacts and future. By B.M. Monge-Sanz et al. in Atmospheric Chemistry and Physics.