For all the BEST Fans

 The chart above is the BEST monthly "Global" average temperature with several layers of smoothing plus a volcanic forcing overlay.

The BEST land surface temperature data set is a nice piece of work, but it is still just land surface temperature data with most of the land in the northern hemisphere.  Surface temperature anomaly in general is falling out of favor with Climate Scientist because of all the noise in the data mainly due to land amplification of dozens of possible "effects".  

BEST is still useful though.  You can see all the land areas that have warmed along with about a third of the areas that have cooled.  You can also use SST data to filter out some of the BEST noise.

This is BEST "Global" Tave scaled to fit the Hadley Center Sea Surface Temperature data for both hemispheres.

Here is the BEST data scaled and spliced to a reconstruction of Indo-Pacific Warm Pool Data by Oppo et al. 2009.  The humps, bumps and slope appear to indicate there is a long term trend common to BEST and HadSST3 which might just be something truly "Global".

And that "Global" something appears to have something to do with Solar and Volcanic (Sol y Vol) activity in the past.    Imagine that?

Update:   Since I am using the newer Crowley and Unterman volcanic forcing estimate instead of the BEST volcanic forcing I should show how they differ.

I didn't try to make this a super fit just a close match to BEST on some of the major eruptions.  Circled are some difference that may appear to be insignificant at first, but with the solar component included is a lot larger than first glance.  The 1915 to 1918 influence was much larger in the SST data and likely contributed to the 1941 SST pop and drop.