“…In the last decade, there has been a surge of interest in the BDC, mainly resulting from the development and continuing improvement of general circulation models (GCMs) and chemistry-climate models (CCMs) with detailed representations of the stratosphere (e.g., Butchart, 2014;Eyring et al, 2005;Gerber et al, 2012;Pawson et al, 2000;SPARC CCMVal, 2010). In agreement with pioneering work by Rind et al (1990), the new stratosphere-resolving GCMs and CCMs consistently predict a strengthening of the BDC in response to greenhouse gas-induced climate change (e.g., Bunzel & Schmidt, 2013;Butchart et al, 2006;Fu et al, 2015;Fu et al, 2019;Garcia & Randel, 2008;Li et al, 2008;Lin & Fu, 2013;McLandress & Shepherd, 2009;Oberlander et al, 2013;Okamoto et al, 2011). Modeling studies also find that the BDC becomes stronger (weaker) in response to the ozone depletion (recovery) (e.g., Li et al, 2008;Lin & Fu, 2013;McLandress et al, 2010;Oman et al, 2009;Polvani et al, 2011;Polvani et al, 2018;Polvani et al, 2019;Shindell & Schmidt, 2004).…”