Quite the opposite. 
AMOC has slowed way down. If it stops AND, it forces the other conveyors to stop, that will mean increased temp at equator, but decreased at poles. Yes, that would cause a drop in Temp at northern Europe, but would also bring an increase in rain in places such as the equator. That would likely turn a number of deserts into productive land again.
CO2 would likely drop, but most of all, it would prevent the permafrost and ocean methane ice from thawing. After all, If those go, then it will not matter how much co2 that man generates.