This study reads so convoluted that it falls short of debunking just about anything. It is not possible to separate us humans from the natural global climate system. We are and always have been part of the overall changes in climate. But continuing to rediscover this is not getting us any closer to being able to respond to changes in climate.
“Unforced Surface Air Temperature Variability and Its Contrasting Relationship with the Atmospheric TOA Energy Flux at Local and Global Spatial Scales,” Patrick T. Brown, Wenhong Li, Jonathan H. Jiang, Hui Su, Feb. 1, 2016, Journal of Climate; DOI: http://dx.doi.org/10.1175/JCLI-D-15-0384.1