It is now official: November was the warmest November on record by a wide margin in the JRA-55 dataset, beating the prior record set in 2020 by 0.3C. November 2023 was 1.6C above preindustrial levels, and the year-to-date temperatures are 1.4C above preindustrial.

Do you know if the regular El Nino CO2 spike will be less substantial because it's now winter on most of the land?

Here is this November compared to all prior Novembers in the record. This year saw the largest exceedance of a prior November record by far in the JRA-55 dataset.

This is fine

I heard recently that, at least in part, the drastically warmer north Atlantic temperatures that were measured this year have to do with a switch to cleaner ship fuels, which reduced the amount of shielding we got from solar rays.