OB026
Seasonal Cycles of Ocean Biogeochemistry and Ecosystems Under a Changing Climate

Session ID#: 85131

Session Description:
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. 

Index Terms:

1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]
4227 Diurnal, seasonal, and annual cycles [OCEANOGRAPHY: BIOLOGICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]

Primary Chair:  Keith B Rodgers, IBS Center for Climate Physics, Busan, South Korea
Co-chairs:  Jorg Schwinger, NORCE Climate, Bergen, Norway and Andrea J Fassbender, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States
Primary Liaison:  Peter Landschuetzer, Max Planck Institute for Meteorology, Hamburg, Germany
 
The seasonal cycle of physical, biogeochemical and biological properties in the marginal ice zone in the Fram Strait: differences in sea ice conditions during the growth phase lead to different carbon production and export patterns (635771)
Wilken-Jon von Appen1, Melanie Bergmann1, Christina Bienhold2, Astrid Bracher3, Morten H. Iversen1, Katja Metfies4, Barbara Niehoff5, Eva-Maria Nothig6, Autun Purser4, Ian Salter7, Sinhue Torres-Valdes1, Frank Wenzhofer8, Matthias Wietz9 and Antje Boetius1, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (2)Max Planck Institute for Marine Microbiology, HGF-MPG Group for Deep Sea Ecology and Technology, Bremen, Germany, (3)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Climate Sciences, Bremerhaven, Germany, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, (5)Alfred Wegener Institute, Polar Biology, Bremerhaven, Germany, (6)Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany, (7)Faroe Marine Research Institute, Environment, Torshavn, Faroe Islands, (8)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, HGF-MPG Group for Deep Sea Ecology and Technology, Bremerhaven, Germany, (9)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Germany
 
Depicting the Need for High Temporal Resolution pH and Oxygen Variability in a Dynamic Alaskan Estuary (636344)
Cale Andrew Miller1,2 and Amanda Kelley1, (1)University of Alaska Fairbanks, College of Fisheries and Ocean Sciences, Fairbanks, AK, United States, (2)University of California Davis, Evolution and Ecology, Davis, CA, United States
 
Creating a New England Salt Marsh Sediment Profile: Methods and Implications for Climate Change Mitigation Strategies (637151)
Hayley Schiebel, Suffolk University, Center for Urban Ecology and Sustainability, Boston, MA, United States, Alexandra MacFarland, Suffolk University, Boston, United States and Taylor Templeton, Suffolk University, United States
 
Seasonal upwelling links iron recycling with eastern equatorial Pacific nitrate consumption and new primary production (637282)
Patrick A Rafter, University of California Irvine, Irvine, CA, United States, Daniel Mikhail Sigman, Princeton University, Princeton, NJ, United States and Katherine Mackey, University of California Irvine, Department of Earth System Science, Irvine, CA, United States
 
Seasonal carbon remineralization in the Mediterranean Sea: Results from a paired-radioisotopic approach (637750)
Wokil Bam1,2, Roberta Hansman1, Beat Gasser1 and Peter Swarzenski1, (1)IAEA International Atomic Energy Agency, Environment Laboratories, Principality of Monaco, Monaco, (2)Louisiana State University, Department of Oceanography and Coastal Sciences, Baton Rouge, LA, United States
 
The importance of the biological pump for reducing uncertainties in future carbon uptake projections (641579)
Timothee Bourgeois1,2, Nadine Goris2,3, 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
 
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, AK, 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
 
Estimates of particulate organic carbon export and loss rates in the warmest sea of the global ocean from a bio-optical profiling float (642241)
Malika Kheireddine1, Giorgio Dall'Olmo2, Mustapha Ouhssain3, George Krokos4, Herve Claustre5, Catherine Schmechtig6, Antoine Poteau7, Peng Zhan8, Ibrahim Hoteit4,9 and Burton H Jones3, (1)KAUST- King Abdullah University of Science and Technology, Red Sea Research Center, Thuwal, Saudi Arabia, (2)Plymouth Marine Laboratory, Plymouth, United Kingdom, (3)King Abdullah University of Science and Technology, Thuwal, Saudi Arabia, (4)King Abdullah University of Science and Technology, Division of Physical Science and Engineering, Thuwal, Saudi Arabia, (5)Laboratoire d'Océanographie de Villefranche, Villefranche-sur-Mer, France, (6)OSU Ecce Terra, UMS 3455, CNRS and Université Pierre et Marie Curie, Paris 6, 4 place Jussieu 75252, Paris, France, (7)Sorbonne Universités, UPMC Univ Paris 06, INSU-CNRS, Laboratoire d'Océanographie de Villefranche, Villefranche-sur-mer, France, (8)Earth Sciences and Engineering Program, King Abdullah University of Science and Technology (KAUST), Jeddah, Saudi Arabia, (9)King Abdullah University of Science and Technology (KAUST), Department of Earth Sciences and Engineering, Thuwal, Saudi Arabia
 
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
 
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 Hussain2 and Baoshan Chen2, (1)Louisiana State University, Baton Rouge, LA, United States, (2)University of Delaware, School of Marine Science and Policy, Newark, DE, United States
 
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 Müller1, Henry C Bittig2, Mati Kahru3, Seppo Kaitala4, Bernd Schneider1, Simo-Matti Siiriä5, Laura Tuomi5 and Norbert Wasmund6, (1)Leibniz Institute for Baltic Sea Research, Department of Marine Chemistry, Rostock, Germany, (2)Leibniz Institute for Baltic Sea Research, Department of Physical Oceanography and Instrumentation, Warnemünde, Germany, (3)Univ California San Diego, La Jolla, CA, United States, (4)Finnish Environment Institute, Helsinki, Finland, (5)Finnish Meteorological Institute, Marine Research Unit, Helsinki, Finland, (6)Leibniz Institute for Baltic Sea Research, Department of Biological Oceanography, Warnemünde, Germany
 
Mechanisms of seasonal variability of carbon cycle in the North Western Pacific: a biogeochemical and carbon modeling study coupled with an operational ocean model product (644565)
Miho Ishizu, Japan Agency for Marine-Earth Science and Technology, Application Lab, Yokohama, Japan, Yasumasa Miyazawa, JAMSTEC, Application Laboratory, Yokohama, Japan, Tomohiko Tsunoda, the Ocean Policy Institute, Tokyo, Japan and Xinyu Guo, CMES, Ehime University, Matsuyama, Japan
 
Diel and Seasonal Cycles of Coastal Acidification and Carbonate Chemistry at Elkhorn Slough (644850)
Lena Champlin, Drexel University, Biodiversity, Earth, and Environmental Sciences, Philadelphia, PA, United States and Elizabeth Watson, Drexel University, Philadelphia, PA, United States
 
Biological Impacts of Physics through Idealized Tracers: Changes in the seasonal cycle of vertical exchange from early to late 21st century (647866)
Genevieve Jay Brett, University of Hawaii at Manoa, International Pacific Research Center, Honolulu, HI, United States, Kelvin John Richards, University of Hawaii at Manoa, Honolulu, HI, United States, Daniel B Whitt, NCAR, CO, United States and Matthew C Long, National Center for Atm Res, Boulder, CO, United States
 
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 Stanley1, (1)Wellesley College, Wellesley, MA, United States, (2)Woods Hole Oceanographic Institution, Woods Hole, MA, United States
 
Coral skeleton-bound nitrogen isotopes reconstruct patterns of upwelling on the Great Barrier Reef (649404)
Hanieh Tohidi Farid, Southern Cross university, Southern Cross Geoscience, Lismore, Australia and Dirk Erler, Southern Cross University, Centre for Coastal Biogeochemistry, School of Environment, Science and Engineering, Lismore, NSW, Australia
 
Seasonal time series profiles provide insight into iron sources to Gulf of Alaska surface waters (649417)
John Crusius, USGS Alaska Science Center at UW School of Oceanography, Seattle, WA, United States
 
Significant future changes in bloom phenology over the high latitudes identified with a large ensemble suite of simulations (649669)
Ryohei Yamaguchi1, Keith B Rodgers1, Karl Joseph Stein1, Axel Timmermann1, John P Dunne2, Sarah Schlunegger3 and Richard Slater3, (1)IBS Center for Climate Physics, Pusan National University, Busan, South Korea, (2)NOAA Geophys Fluid Dynamic, Princeton, United States, (3)Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States
 
Spatial and temporal variability in the carbonate system of Galveston Bay (651669)
Larissa Dias, Texas A&M University Corpus-Christi, Corpus Christi, TX, United States, Xinping Hu, Texas A&M University - Corpus Christi, Physical and Environmental Sciences, Corpus Christi, TX, United States and Hui Liu, Texas A&M University at Galveston, Marine Biology, Galveston, TX, United States
 
A climatology of spatial and seasonal patterns of carbonate chemistry parameters on the Northeast U.S. Continental Shelf (652066)
Chris Melrose, NOAA, National Marine Fisheries Service, Northeast Fisheries Science Center, Narragansett, RI, United States and Aleck Zhaohui Wang, Marine Chemistry and Geochemistry, Woods Hole, MA, United States
 
The Effect of Modelling Mechanistically Phytoplankton Photo-physiology on the Seasonal Cycle of Primary Production in Polar Regions (652287)
Eva Alvarez1,2, Onur Karakus1 and Judith Hauck1, (1)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Marine Biogeosciences, Bremerhaven, Germany, (2)Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Oceanography, Trieste, Italy
 
Seasonal and tidal pH changes in a New England salt marsh: climate change implications for marsh functionality (652430)
Alexandra MacFarland, Suffolk University, Boston, United States and Hayley Schiebel, Suffolk University, Center for Urban Ecology and Sustainability, Boston, MA, United States
 
Future Phase Reversal of the Seasonal Cycle of pCO2 in the Arctic Ocean (652957)
James C Orr, LSCE/IPSL, Laboratoire des Sciences du Climat et de l'Environnement, Gif-Sur-Yvette, France, Lester Kwiatkowski, LOCEAN / IPSL, Paris, France and Hans O Portner, Intergovernmental Panel on Climate Change, WGII Co-Chair, Alfred Wegener Institute, Bremen, Germany
 
The spatiotemporal variability in ocean acidification on the Newfoundland and Labrador Shelves (653491)
Olivia T Gibb1, Frederic Cyr2, David Bélanger1, Gary Maillet3 and Pierre Pepin2, (1)Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St John's, NF, Canada, (2)Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St. John's, NF, Canada, (3)Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, NF, Canada
 
State of the Eastern Mediterranean, Black Sea and the Sea of Marmara under a changing environment. (654024)
Baris Salihoglu1, Bettina Fach2, Devrim Tezcan1, Ehsan Sadighrad3, Mustafa Yucel1, Hasan Orek1, Sinan S Arkin1 and Suleyman Tugrul1, (1)Middle East Technical University, Institute of Marine Sciences, Mersin, Turkey, (2)Middle East Technical University, Institute of Marine Sciences, Mersin, Turkey, Turkey, (3)Middle East Technical University, Institute of Marine Sciences, Mersin, Erdemli, Turkey
 
Evaluation of model representations of the Southern Ocean seasonal air-sea carbon dioxide flux (Invited) (654437)
Seth M Bushinsky, University of Hawaii at Manoa, Marine Sciences Building, Honolulu, HI, United States, Syukuro Manabe, Princeton University, Princeton, NJ, United States, Sarah Schlunegger, Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States, Alexander Haumann, Princeton University, United States, Peter Landschuetzer, Max Planck Institute for Meteorology, Hamburg, Germany, Matthew R Mazloff, SIO, La Jolla, CA, United States, Alison R Gray, University of Washington, School of Oceanography, Seattle, WA, United States and Jorge L Sarmiento, Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States
 
Picophytoplankton Phenology in the Global Ocean Addressed by Quantitative Niche Models (655353)
Natalia Visintini and Pedro Flombaum, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones del Mar y la Atmósfera, Buenos Aires, Argentina
 
Influence of Drought, Periodic Storm Events, and Hurricane Harvey on the Phytoplankton Community in a South Texas Estuary (656173)
Sarah V Douglas, University of Texas at Austin, Marine Science Institute, Port Aransas, United States, Jianhong Xue, UT Austin MSI, Port Aransas, TX, United States, Zhanfei Liu, UT Austin, Port Aransas, TX, United States and Amber Hardison, University of Texas at Austin, Marine Science Institute, Port Aransas, TX, United States
 
Seasonal cycles of plankton ecology and CO2: subpolar lessons from satellite data and coupled climate models (657982)
Irina Marinov1, Shunzi Lu2, Priya Sharma2, Anna Cabre3 and Behzad Asadieh2, (1)University of Pennsylvania, Department of Earth and Environmental Sciences, Philadelphia, PA, United States, (2)University of Pennsylvania, Philadelphia, PA, United States, (3)Instituto de Ciencias del Mar, Barcelona, Spain
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