Berkeley Earth's work has been published in Science Advances [sciencemag.org] (DOI: 10.1126/sciadv.1601207) (DX [doi.org])
2016 was the warmest year since humans began keeping records, by a wide margin. Global average temperatures were extremely hot in the first few months of the year, pushed up by a large El Nino event. Global surface temperatures dropped in the second half of 2016, yet still show a continuation of global warming.
This is the third record-breaking year in a row.
http://berkeleyearth.org/a-second-half-dip-but-2016-hottest-on-record/ [berkeleyearth.org]