Sea surface temperatures in the subpolar North Atlantic increased by nearly 1°C from 2015 to 2018 according to a new study (Desbruyères et al., 2021). As of 2020, this region is now almost as hot as it was in 2007, 1930, and 1890 (Birkel et al., 2018).
Image Source: Desbruyères et al., 2021
Image Source: Birkel et al., 2018
For an even longer-term perspective, it would appear this region is now colder than just about any other period in the last 7000 years (Orme et al., 2018).