Southern Ocean wind stress affects the North Atlantic overturning via northward propagating temperature and salinity anomalies ...

• Main Authors: Schulzki, Tobias, Schwarzkopf, Franziska, Biastoch, Arne
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Southern Ocean; North Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-1807; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017780

<!--!introduction!--> The southern hemisphere westerly winds are projected to increase in the future, altering local ocean hydrography and dynamics. While anomalies of southern hemisphere origin were shown to affect the Atlantic Meridional Overturning Circulation, many details of this connection remain unexplained. Most existing studies are limited by the application of forced ocean models that prevent an atmospheric response to the anomalies, coarse resolution ocean models not able to explicitly simulate mesoscale variability, or a short runtime of experiments. Here we apply a coupled, nested model configuration covering the entire Atlantic at an eddying resolution of 1/10°, to study the inter-hemispheric propagation of anomalies generated by a 30% increase in southern hemisphere wind stress. To obtain statistically more robust results, a 5-member ensemble experiment is conducted with a runtime of 120 years of each member. The South Atlantic response is dominated by a sustained increase of Agulhas ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...