A new study reports there has been a -0.3°C cooling in the Southern Ocean since 1982 per multiple observational data sets. The authors detail the “failure of CMIP5 models in simulating the observed SST cooling in the Southern Ocean.”
Image Source: Shuttleworth et al., 2021
Image Source: Civel-Mazens et al., 2021
Image Source: Ghadi et al., 2020
A new study (Xu et al., 2022) suggests the Southern Ocean (50°S–70°S) has continued to cool for the last 40 years, with amplitudes ranging from -0.1°C to -0.3°C per decade in some regions.
Climate models are unable to simulate this cooling, as they are famously incapable of accurately depicting the role of cloud forcing in modulating sea surface temperature trends.
“SST in the Southern Ocean is considered as an important indicator of climate change. This study shows that the Southern Ocean (50°S–70°S) sea surface temperature has a significant and robust cooling trend during 1982–2020”