Speaker: Dr. Jaime Palter, GSO Assistant Professor
Title: Global Climate Impacts of North Atlantic Ocean Variability
North Atlantic sea surface temperatures have pronounced multi-decadal variability, very likely a result of fluctuations in ocean heat transport convergence. This multi-decadal signal manifests in Western European climate variability in all seasons except winter, despite the persistence of the North Atlantic anomalies throughout the year. Using complementary Lagrangian and Eulerian approaches, both driven by reanalysis data, we show that the absence of the wintertime signal in European climate is due to a dynamic perturbation to the atmospheric circulation associated with the SST anomalies. Notably, this atmospheric perturbation resembles that predicted due to a reduction in the Atlantic Meridional Overturning Circulation (AMOC) under CO2 forcing. With a global climate model, we explore the global climate implications of the atmosphere’s response to an AMOC slowdown.