Recent  

Observations and climate models consistently indicate that, during the past decades in the tropics and subtropics, land surfaces at higher altitudes have been warming faster than lower-elevated ones, a phenomenon denoted as elevation-dependent warming (EDW). In this study, Byrne and co-authors quantify the magnitude of this effect, attribute it to greenhouse gas forcing, and provide a very thorough and comprehensive analysis of the underlying mechanisms. They identify Planck and surface albedo feedback as well as atmospheric energy transport as most important drivers of EDW, while water vapor and cloud feedback oppose EDW. In this way, the authors substantially improve our understanding of a fundamental aspect of current climate warming.