AtlantECO podcast podcast

46. Mega marine heatwaves in the North Atlantic

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In the latest episode of the AtlantECO Podcast, we delve into the critical topic of mega heatwaves in the Atlantic withguest Thomas Frölicher. The conversation covers the causes, consequences, monitoring, and future expectations of theseincreasingly observed phenomena, including the recent heatwave observed in the North Atlantic.

Thomas Frölicher, originally from landlocked Switzerland, shares his unique journey into oceanography. Growing up with a curious mind inspired by his father's interest in physics, Thomas eventually found his passion for environmental science. His focus on atmospheric physics led him to explore oceanography during his PhD, where he investigated the variations in oceanic oxygen concentration and its connection to human-caused global warming.


We then discuss marine heatwaves, defined as periods of persistently warm ocean temperatures. Thomas explains that these events are becoming more prevalent globally, affecting ecosystems, weather patterns, and land conditions. The North Atlantic, in particular, is experiencing mega heatwaves, with temperatures significantly higher than ever recorded. Thomas discusses potential causes of marine heatwaves, such as enhanced air-sea heat uptake, changing ocean currents, and various other factors. The global ocean currently faces record-high temperatures, with about 30% experiencing a marine heatwave. The North Atlantic stands out with temperatures 0.5 degrees higher than previous records, raising concerns among scientists.


To understand these heat waves, scientists rely on high-temporal-resolution datasets from satellites, ARGO floats, buoys, and ocean models. Thomas emphasises the importance of collaboration among researchers with diverse expertise to comprehensively analyse the multitude of factors contributing to the current temperature anomalies.


We then touch upon the consequences of mega heat waves on marine life and ecosystems, and Thomas highlights the sensitivity of ecosystems to high temperatures, leading to damages worth billions of dollars in industries such as fisheries and tourism. In AtlantECO project, Thomas and his team aim to assess the impact of a combination of multiple extreme events in the Atlantic, providing valuable data for managing ocean resources and mitigating risks.


More on AtlantECO: www.atlanteco.eu

The AtlantECO project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 862923. This output reflects only the author’s view and the European Union cannot be held responsible for any use that may be made of the information contained therein.

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