HadSST3 has finally been updated for February and March so I can calculate global temperatures based on spherical triangulation.
So far 2021 is running much cooler that 2020. The temperatures for the first 3 months of the year are:
|Jan||0.65C (down 0.01C from Dec 2020 and 0.31 from Nov 2020)|
|Feb||0.52C (further drop of 0.16C)|
|Mar||0.65C (rise of 0.13C)|
Based on the first 3 months there has also been a large drop in the “annual” temperature of ~0.3C compared to 2020, back to levels seen 15 years ago (2005).
Much of the Southern Hemisphere temperatures are actually even lower than the 1961-1990 average temperature.
I may convert to HadSST4 once HadCRUT5 becomes operational. However this update yet again increases warming trends (surprised?)