The Sun is rapidly cooling! So global warming will start reversing any day now, and by 2020 we'll be back to zero anomalies and this AGW crap can be put to bed and the legal prosecutions of scientists can begin. (Or something like that, I guess.)
Sorry, but the Sun goes through dips and spikes like this several times a year, typically (though I don't know the reason.) Here is a graph of the same data as above, but starting in Jan 2014 instead of Jan 2016:
By starting the graph in Jan 2016, WUWT makes it look like the first spike of the year is something unusual. But it's just business as usual.... (I commented on this at WUWT, but -- cowards -- they deleted my comment.)
Reminder: anyway, the climate's sensitivity to changes in solar irradiance is very low, ≈ 0.1 W/m2 or less.
PS: Leif Svalgaard of Stanford says these spikes are due to large sunspots.