“The article bases its claims on a 1ºF (0.6ºC) drop in land temperatures.”
Yes it does. That is what the satellites say so you can’t debate the observations.
“short variations in temperature would do little to contradict the evidence”
Quite true. We should be concerned with climate change not global weather. El Nino/La Nina are natural weather phenomena with multiyear global impacts. They should be ignored when it comes to the debate on climate change. The global and regional impacts of El Nino/La Nina are quite predictable and the Breitbart article is mixing up indicators of global cooling, which is inevitable in a post El Nino world, with a long term, multi-decadal climate change. Of course, nobody should mix up the 2015–2016 spike in global temperatures with climate change either.