In 1920, NOAA had very poor coverage of the Earth.
ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/daily/figures/station-counts-1891-1920-temp.png
They still have very poor coverage of the Earth.
But not to worry – like Harold they have they have their magic purple and red crayons to fill in all that empty space.
via The Deplorable Climate Science Blog
April 17, 2019 at 10:26AM
Iowa Climate Science Education 
