Thanks for this. I'd never heard of Michael Dowd, but I've landed on a secular version of this. It's nice to know there are others who share this view.
Looks like nothing has changed with Co2, it is following the same exact trend line. Methane for some reason had flat lined 2000-2006, is back up too; mostly likely its due to increased livestock farming serving increased population. Learned a new term. global albedo.. which means an earth that is getting darker and absorbing more light.