PC51A:
Marine Heat Waves and Ocean Biogeochemical Extremes I

Session ID#: 92912

Session Description:
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.

Co-Sponsor(s):
  • AI - Air-Sea Interactions
  • ME - Marine Ecology and Biodiversity
  • OC - Ocean Change: Acidification and Hypoxia
  • PI - Physical-Biological Interactions
  • PS - Physical Oceanography: Mesoscale and Smaller
Index Terms:
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:  SOFIA Darmaraki, Meteo-France/CNRM, Toulouse, France, Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States, Hillary A Scannell, University of Washington, School of Oceanography, Seattle, WA, United States and Robert Schlegel, Dalhousie University, Oceanography, Halifax, Canada
Student Paper Review Liaison:  Thomas L Froelicher, Princeton Univ, Princeton, NJ, United States

Abstracts Submitted to this Session:

Changes in marine heatwaves globally over the 20th and 21st centuries (650732)
Eric Oliver1, Markus Donat2, Michael T Burrows3, Pippa J Moore4, Dan E Smale5, Lisa Alexander6, Jessica Benthuysen7, Ming Feng8, Alexander Sen Gupta9, Neil John Holbrook10, Sarah Perkins-Kirkpatrick11, Hillary A Scannell12, Sandra E Straub13, Mads S Thomsen14 and Thomas Wernberg13, (1)Dalhousie University, Department of Oceanography, Halifax, NS, Canada, (2)Barcelona Supercomputing Center, Barcelona, Spain, (3)Scottish Marine Institute, Department of Ecology, Oban, United Kingdom, (4)Aberystwyth University, Institute of Biological, Environmental and Rural Sciences, Aberystwyth, United Kingdom, (5)Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom, (6)University of New South Wales, ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia, (7)Australian Institute of Marine Science, Townsville, QLD, Australia, (8)CSIRO, Oceans and Atmosphere, Crawley, WA, Australia, (9)University of New South Wales, Climate Change Research Centre, Sydney, NSW, Australia, (10)University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, (11)University of New South Wales, Climate Change Research Centre and ARC Centre of Excellence for Climate System Science, Sydney, NSW, Australia, (12)University of Washington, School of Oceanography, Seattle, WA, United States, (13)The University of Western Australia, UWA Oceans Institute and School of Biological Sciences, Perth, WA, Australia, (14)School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, New Zealand
Extreme Marine Heatwaves –common characteristics, drivers and impacts (638002)
Alexander Sen Gupta, ARC Centre of Excellence for Climate Extremes, Sydney, Australia, Mads S Thomsen, School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, New Zealand, Jessica Benthuysen, Australian Institute of Marine Science, Townsville, QLD, Australia, Alistair J Hobday, CSIRO Oceans and Atmosphere, Hobart, TAS, Australia, Eric Oliver, Dalhousie University, Department of Oceanography, Halifax, NS, Canada, Lisa Alexander, University of New South Wales, ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia, Michael T Burrows, Scottish Marine Institute, Department of Ecology, Oban, United Kingdom, Markus Donat, Barcelona Supercomputing Center, Barcelona, Spain, Ming Feng, CSIRO, Oceans and Atmosphere, Crawley, WA, Australia, Neil John Holbrook, University of Tasmania, Institute for Marine and Antarctic Studies, Hobart, TAS, Australia, Sarah Perkins-Kirkpatrick, University of New South Wales, Climate Change Research Centre and ARC Centre of Excellence for Climate System Science, Sydney, NSW, Australia, Pippa J Moore, Aberystwyth University, Institute of Biological, Environmental and Rural Sciences, Aberystwyth, United Kingdom, Regina Rodrigues, Federal University of Santa Catarina, Florianopolis, SC, Brazil, Hillary A Scannell, University of Washington, School of Oceanography, Seattle, WA, United States, Andrea Taschetto, University of New South Wales, Sydney, NSW, Australia, Caroline Ummenhofer, WHOI, Woods Hole, MA, United States, Thomas Wernberg, The University of Western Australia, UWA Oceans Institute and School of Biological Sciences, Perth, WA, Australia and Dan E Smale, Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom
Recent Extremes in North Pacific Climate and the 2019 Alaskan Heatwave (652616)
Emanuele Di Lorenzo, Georgia Institute of Technology Main Campus, Program in Ocean Science & Engineering, Atlanta, GA, United States and Dillon J Amaya, University of Colorado, Boulder, CO, United States
The 2019 Reappearance of the Northeast Pacific Marine Heatwave (649029)
Hillary A Scannell1, Stephen Riser1, LuAnne Thompson1 and Gregory C Johnson2, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
What Caused the Warm Anomalies at Depth in the Northern Gulf of Alaska in 2019? (653313)
Nicholas A Bond, University of Washington Seattle Campus, Seattle, WA, United States and Phyllis J Stabeno, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Deep marine heatwaves: relating drivers and characteristics. (644638)
Amandine Schaeffer, University of New South Wales, School of Mathematics and Statistics, Sydney, NSW, Australia, Youstina Elzahaby, University of New South Wales, Sydney, NSW, Australia and Moninya Roughan, University of New South Wales, Biological Earth and Environmental Sciences, UNSW Sydney, NSW, Australia
Mediterranean Marine Heatwaves: Past Variability, Future Evolution and Physical Drivers (645988)
SOFIA Darmaraki, University of Dalhousie, Oceanography, Halifax, NS, Canada, Samuel Somot, CNRM (Météo-France and CNRS), Toulouse, France, Robin Waldman, Centre National de Recherches Meteorologiques (CNRM), Meteo France/CNRS, Toulouse, France, Florence Sevault, CNRM / Météo-France, Toulouse, France and Pierre Nabat, METEO FRANCE/CNRM, Toulouse, France
Using a Long-term Landsat Timeseries to Understand the Effect of Marine Heatwaves on Unprecedented Declines in Northern California Bull Kelp (648799)
Meredith L McPHERSON, University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, Dennis Finger, University of California, Berkeley, Berkeley, CA, United States, Raphael Martin Kudela, University of California Santa Cruz, Santa Cruz, United States and Henry Francis Houskeeper, University of California Santa Cruz, Santa Cruz, CA, United States