Periods of prolonged and extremely high ocean temperatures, known as marine heatwaves, have negatively impacted marine organisms and ecosystems throughout the global ocean. Projections under global warming suggest that these heatwaves will increase in frequency, duration, and intensity, leading to a high risk of severe, pervasive and in some cases irreversible impacts on natural and socio-economic systems. Combined with the progression of extreme events in ocean acidification and deoxygenation, marine heatwaves expand the dimensions of such events. Of particular concern are compound events with multiple concurrent or consecutive drivers (e.g. marine heatwaves co-occur with hypoxic conditions) that may exacerbate consequences for marine ecosystems. Although there are a few studies on individual and compound extreme events in the ocean, the underlying drivers and the degree to which they can be represented in current climate models is currently unknown, making it difficult to design appropriate management strategies.
This session seeks current knowledge as well as new and evolving insights into modeling and observational efforts that advance our understanding of the regional and global changes in marine extreme events (heatwaves, hypoxia, acidification, nutrient stress) and how these events impact marine organisms, biodiversity and ecosystem services.
Primary Chair: Thomas L Froelicher, University of Bern, Climate and Environmental Physics, Bern, Switzerland
Co-chairs: Hillary A Scannell1, SOFIA Darmaraki2 and Robert Schlegel2, (1)University of Washington, School of Oceanography, Seattle, United States(2)Dalhousie University, Oceanography, Halifax, Canada
Primary Liaison: Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States
Moderators: Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States and Hillary A Scannell, University of Washington, School of Oceanography, Seattle, WA, United States
Student Paper Review Liaison: Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States