It has long been known that seasonal cycles in biogeochemistry and ecosystems present some of the largest variations that can be observed. However, only recently has it been identified that the seasonal cycles of ocean chemistry are changing significantly under anthropogenic forcing. This is important not only for the uptake of carbon by the ocean but also for ecosystem stressors and ecosystems themselves, as they will be exposed to critical thresholds earlier in time under continued emissions. It has been also shown that parts of the uncertainties in future projections of ocean carbon uptake can be traced back to the skill of Earth system models in simulating the seasonal cycles of biogeochemical drivers.
This session welcomes studies that work with observational records and/or modeling tools to understand the mechanistic controls on seasonal variations in biogeochemistry and ecosystems. Studies that focus on the evaluation of models and show how and why seasonal cycles can be used as observational constraints for future projections are also invited. Abstracts are particularly welcomed that focus on the interplay between biological/biogeochemical and physical processes, with scientific questions that range from the marine carbon cycle to fisheries.
Primary Chair: Keith B Rodgers, IBS Center for Climate Physics, Busan, South Korea
Co-chairs: Jorg Schwinger, NORCE Climate, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway and Andrea J Fassbender, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Primary Liaison: Peter Landschuetzer, Max Planck Institute for Meteorology, Hamburg, Germany
Moderators: Jorg Schwinger, NORCE Climate, Bergen, Norway and Andrea J Fassbender, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States
Student Paper Review Liaison: Keith B Rodgers, IBS Center for Climate Physics, Pusan National University, Busan, South Korea
Benthic Fluxes of Dissolved Inorganic Carbon (DIC) and Total Alkalinity (TA) in the Northern Gulf of Mexico Shelf Sediments (643986)
Hannah Beck1, Kanchan Maiti1, Wei-Jun Cai2, Najid Hussain3 and Baoshan Chen2, (1)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, United States, (2)University of Delaware, School of Marine Science and Policy, Newark, DE, United States, (3)University of Delaware, School of Marine Science and Policy, Newark, United States
Biological Impacts of Physics through Idealized Tracers: Changes in the seasonal cycle of vertical exchange from early to late 21st century (647866)
Dr. Genevieve Jay Brett, PhD, University of Hawaii at Manoa, International Pacific Research Center, Honolulu, HI, United States, Kelvin John Richards, University of Hawai’i at Mānoa, International Pacific Research Center, Honolulu, United States, Daniel B Whitt, NASA, Mountain View, CA, United States and Matthew C Long, [C]Worthy, LLC, Boulder, United States
Decadal Study: What are the Factors Influencing the Carbon Cycle in the Western European Coastal Ecosystems? (643243)
Jean-Philippe Gac1, Thierry Cariou1, Emilie Grossteffan2, Eric Macé1, Peggy Rimmelin-Maury2, Marc Vernet1 and Yann Bozec1, (1)Sorbonne Université, CNRS, UMR 7144 AD2M, Station Biologique de Roscoff, Roscoff, France, (2)IUEM, UMS3113, Service d'observation, Technopôle Brest-Iroise, rue Dumont d'Urville, Plouzané, France
Depicting the Need for High Temporal Resolution pH and Oxygen Variability in a Dynamic Alaskan Estuary (636344)
Cale Andrew Miller, University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States; University of California Davis, Evolution and Ecology, Davis, CA, United States and Amanda Kelley, University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, United States
Evaluation of model representations of the Southern Ocean seasonal air-sea carbon dioxide flux (Invited) (654437)
Seth M Bushinsky, University of Hawaii at Manoa, Department of Oceanography, Honolulu, United States, Syukuro Manabe, Princeton University, AOS, Princeton, United States, Sarah Schlunegger, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States, Alexander Haumann, Princeton University, Princeton, United States, Peter Landschuetzer, Max Planck Institute for Meteorology, Hamburg, Germany, Matthew R Mazloff, Scripps Institution of Oceanography, UCSD, La Jolla, United States, Alison R Gray, University of Washington, School of Oceanography, Seattle, United States and Jorge L Sarmiento, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States
High-frequency multiyear time-series highlights seasonal and annual pH variability along a freshwater gradient in Alaska’s Beaufort Sea (641618)
Amanda Kelley, University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, United States, Arley Muth, University of Texas at Austin, Marine Science Institute, Port Aransas, TX, United States and Kenneth H Dunton, University of Texas at Austin, Marine Science Institute, Austin, TX, United States
Influence of Drought, Periodic Storm Events, and Hurricane Harvey on the Phytoplankton Community in a South Texas Estuary (656173)
Sarah V Douglas1, Jianhong Xue2, Zhanfei Liu3 and Amber Hardison2, (1)University of Texas at Austin, Marine Science Institute, Austin, TX, United States, (2)University of Texas at Austin, Marine Science Institute, Port Aransas, United States, (3)University of Texas at Austin- Marine Science Institute, Port Aransas, United States
Seasonal carbon remineralization in the Mediterranean Sea: Results from a paired-radioisotopic approach (637750)
Dr. Wokil Bam, PhD1,2, Roberta Hansman1, Beat Gasser3 and Peter Swarzenski1, (1)IAEA International Atomic Energy Agency, Environment Laboratories, Principality of Monaco, Monaco, (2)Woods Hole Oceanographic Institution, Department of Marine Chemistry & Geochemistry, Woods Hole, United States, (3)IAEA International Atomic Energy Agency, Marine Environment Laboratories, Principality of Monaco, Monaco
Seasonal variations in Rates of Net Community and Gross Primary Production on the Northeastern Shelf (648123)
Arshia Mehta1, Helene Rachel Alt1, Elizabeth Lambert1, Emily B Kopp1, Zoe Sandwith2, Heidi M Sosik2 and Rachel Stanley3, (1)Wellesley College, Wellesley, MA, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States, (3)Wellesley College, Wellesley, United States
The importance of the biological pump for reducing uncertainties in future carbon uptake projections (641579)
Timothee Bourgeois1,2, Nadine Goris3,4, Jorg Schwinger1,2 and Jerry Tjiputra1,2, (1)NORCE Climate, Bergen, Norway, (2)Bjerknes Centre for Climate Research, Bergen, Norway, (3)NORCE Climate, Bjerknes Centre for Climate Research, Bergen, Norway, (4)NORCE Norwegian Research Centre and Bjerknes Centre for Climate Research, Bergen, Norway
Unusually High Solar Flux Triggered Extreme Productivity Patterns During the Spring Bloom 2018 in the Central Baltic Sea suggesting Vertical Nutrient Shuttling: a Glimpse into a Potential Future? (644068)
Gregor J Rehder1, Jens Daniel Müller2, Henry C Bittig3, Mati Kahru4, Seppo Kaitala5, Bernd Schneider2, Simo-Matti Siiriä6, Laura Tuomi6 and Norbert Wasmund7, (1)Leibniz Institute for Baltic Sea Research, Rostock, Germany, (2)Leibniz Institute for Baltic Sea Research, Department of Marine Chemistry, Rostock, Germany, (3)Leibniz Institute for Baltic Sea Research, Department of Physical Oceanography and Instrumentation, Warnemünde, Germany, (4)Univ California San Diego, La Jolla, CA, United States, (5)Finnish Environment Institute, Helsinki, Finland, (6)Finnish Meteorological Institute, Marine Research Unit, Helsinki, Finland, (7)Leibniz Institute for Baltic Sea Research, Department of Biological Oceanography, Warnemünde, Germany
