Apparently, the warmists can’t wait for this… so they have to cheat.
May 10 Comment: NOAA has reported 400.03 for yesterday, but Scripps has reported 399.73. The difference is similar to other differences we have reported. The difference partly reflects time zone differences. NOAA uses UTC, whereas we use local time in Hawaii to define the start and stop of a given day. Changing to UTC excludes the lower CO2 period from the baseline on the May 9, shifting it to May 10.
The remaining baseline data then averages 400.08 for May 9.