Abstract
Robustness of climate models is considered by philosophers of climate science to be a crucial issue in determining whether and to what extent the projections of the Earth’s future climate that models yield should be trusted—and in turn whether society should pursue policies to address mitigation of and adaptation to anthropogenic climate change. Parker (2011) and Lloyd (2009, 2015) have introduced influential accounts of robustness for climate models with seemingly conflicting conclusions. I argue that Parker and Lloyd are characterizing distinct notions of robustness and that confidence in the projections is warranted in virtue of confidence in the models.
