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In 2015, Professor Lynne D. Talley from the Scripps Institution of Oceanography, US, was a guest speaker. In her presentation “Role of the Southern Ocean in the Global Overturning Circulation”, she drew a broad arc from the global conveyor belt of thermohaline circulation to high-tech carbon measurements in the Southern Ocean.
The 4th lecture took place on September 22nd, 2022 with Professor Jean-Louis Tison from the Université Libre de Bruxelles, Belgium.
Prof. Jean-Louis Tison is an expert in the field of physics and biogeochemistry of glacier and sea ice. His abstract and the title of the lecture were: “SEA ICE: A dynamic physical and biogeochemical interface between ocean and atmosphere”.
Sea ice, the frozen ocean in both polar regions, is known to affect the Earth's albedo, the formation of deep water and the exchange of energy and matter between the ocean and the atmosphere. For a long time it was (and mostly still is) considered a passive insulator between the ocean and the atmosphere, especially in global modeling approaches. More recently, however, it has been shown to be one of the most extensive ecosystems on Earth, with a life of its own in which complex microphysical processes together with active internal biogeochemical processes could challenge the notion of the “passive blanket”, with potential climatic and economic implications.
Henk A. Dijkstra is Professor of Dynamic Oceanography at the Institute for Marine and Atmospheric Research Utrecht and Director of the Center for Complex Systems Studies at the Department of Physics, Utrecht University. He is as an applied mathematician and has held positions at the University of Groningen, Cornell University and Colorado State University. His main research interests are in climate variability, particularly in climate transitions, with a focus on the role of the oceans. He is a member of the Royal Netherlands Academy of Sciences, a Fellow of the Society for Industrial and Applied Mathematics and received the Lewis Fry Richardson Medal from the European Union of Geosciences in 2005. In 2021, he was awarded an Advanced Grant from the European Research Council.
Peter Dueben is head of the Earth System Modeling Department at ECMWF, where he works on the development of one of the world's leading global weather prediction models. He was previously Coordinator for AI and Machine Learning at ECMWF and held a Royal Society University Research Fellowship where he conducted research on the use of machine learning, high performance computing and reduced numerical precision in weather and climate simulations. Peter Dueben is coordinator of the MAELSTROM EuroHPC Joint Undertaking project, which implements a software/hardware co-design cycle to optimize the performance and quality of machine learning applications in the field of weather and climate science.