AUTHOR=Bishop Craig H. , Whitaker Jeffrey S. , Lei Lili TITLE=Commentary: On the Efficiency of Covariance Localisation of the Ensemble Kalman Filter Using Augmented Ensembles JOURNAL=Frontiers in Applied Mathematics and Statistics VOLUME=6 YEAR=2020 URL=https://www.frontiersin.org/journals/applied-mathematics-and-statistics/articles/10.3389/fams.2020.00002 DOI=10.3389/fams.2020.00002 ISSN=2297-4687