Just to list some uncertainties:

(1) Gulf Stream is a wind-driven western boundary current and the equatorial Atlantic is getting warmer and warmer so heat delivery is probably stable;

(2) Greenland melt rates are real and fresher ocean water won’t sink as much and could push northern surface currents south;

(3) Wind-driven upwelling (other end of the AMOC) is likely to stay stable so you have the suction pump effect;

(4) Atmospheric warming and overall climate conditions today are very different from that 12,000 ya system the article cites;

Regardless, dumping all this fossil CO2 and CH4 into the atmosphere is definitely changing the climate system; but rather than cooling Europe and the UK I’d guess this will just reduce the warming rate in that region over the next 100 years, and it might cause problems with ocean hypoxia due to slower rates of deep water formation, impacting fish populations.

P.S. If you want to vet these claims, plug it into an LLM with this header: “ As an expert in global planetary science, give me some critiques with positive/negative paper references that both support and push back against each point (eight papers total please, prefer recent, then critique summary).”