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:

1616 Climate variability [GLOBAL CHANGE]
4271 Physical and chemical properties of seawater [OCEANOGRAPHY: GENERAL]
4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4954 Sea surface temperature [OCEANOGRAPHY: GENERAL]
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:

PC51A-01
Changes in marine heatwaves globally over the 20th and 21st centuries (650732)
Eric Oliver, Dalhousie University, Department of Oceanography, Halifax, NS, Canada, Markus Donat, Barcelona Supercomputing Center, Barcelona, Spain, Michael T Burrows, Scottish Marine Institute, Department of Ecology, Oban, United Kingdom, Pippa J Moore, Aberystwyth University, Institute of Biological, Environmental and Rural Sciences, Aberystwyth, United Kingdom, Dan E Smale, Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom, Lisa Alexander, University of New South Wales, ARC Centre of Excellence for Climate Extremes, Sydney, NSW, Australia, Jessica Benthuysen, Australian Institute of Marine Science, Perth, Western Australia, Australia, Ming Feng, CSIRO, Environment, Crawley, Western Australia, Australia, Alexander Sen Gupta, University of New South Wales, Climate Change Research Centre, Sydney, NSW, 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, Hillary A Scannell, University of Washington, School of Oceanography, Seattle, WA, United States, Sandra E Straub, The University of Western Australia, UWA Oceans Institute and School of Biological Sciences, Perth, WA, Australia, Mads S Thomsen, School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand, New Zealand and Thomas Wernberg, The University of Western Australia, UWA Oceans Institute and School of Biological Sciences, Perth, Western Australia, Australia
PC51A-02
Extreme Marine Heatwaves –common characteristics, drivers and impacts (638002)
Alexander Sen Gupta, ARC Centre of Excellence for Climate Extremes, Sydney, NSW, 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, Perth, Western Australia, Australia, Alistair J Hobday, CSIRO Environment, 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, Environment, Crawley, Western Australia, 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, United States, Thomas Wernberg, The University of Western Australia, UWA Oceans Institute and School of Biological Sciences, Perth, Western Australia, Australia and Dan E Smale, Marine Biological Association of the United Kingdom, The Laboratory, Citadel Hill, Plymouth, United Kingdom
PC51A-03
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, United States
PC51A-04
The 2019 Reappearance of the Northeast Pacific Marine Heatwave (649029)
Hillary A Scannell1, Stephen Riser2, LuAnne Thompson2 and Gregory C Johnson3, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)University of Washington, School of Oceanography, Seattle, United States, (3)NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
PC51A-05
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
PC51A-06
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, Coastal and Regional Oceanography Lab, School of Biological, Earth & Environmental Sciences, Sydney, NSW, Australia
PC51A-07
Mediterranean Marine Heatwaves: Past Variability, Future Evolution and Physical Drivers (645988)
Sofia Darmaraki, National and Kapodistrian University of Athens, Department of Biology, Athens, ARRAY(0xff17fe0), Greece, 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
PC51A-08
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
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