Also, go here to see Roy Spencer's satellite data (UHC) as well as RSS's along with the surface data. Most meaningful to look at 20+ year trends. And it's important to remember that satellite data doesn't measure surface temps and is subject to systemic bias due to orbital decay:

http://www.ysbl.york.ac.uk/~cowtan/applets/trend/trend.html


For details on the science, go here: https://scienceofdoom.com/

and for a gentle introduction go here: http://history.aip.org/climate/summary.htm