OB53B:
Seasonal Cycles of Ocean Biogeochemistry and Ecosystems Under a Changing Climate I

Session ID#: 93181

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. 

Co-Sponsor(s):
  • OC - Ocean Change: Acidification and Hypoxia
  • PC - Past, Present and Future Climate
  • PL - Physical Oceanography: Mesoscale and Larger
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; 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

Abstracts Submitted to this Session:

OB53B-01
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
OB53B-02
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
OB53B-03
Seasonal upwelling links iron recycling with eastern equatorial Pacific nitrate consumption and new primary production (637282)
Patrick A Rafter, University of California Irvine, Earth System Science, Irvine, CA, United States, Daniel Mikhail Sigman, Princeton University, Princeton, United States and Katherine Mackey, University of California Irvine, Department of Earth System Science, Irvine, CA, United States
OB53B-04
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 Bergmann2, Christina Bienhold3, Astrid Bracher4, Morten H. Iversen5, Katja Metfies6, Barbara Niehoff7, Eva-Maria Nothig8, Autun Purser6, Ian Salter9, Sinhue Torres-Valdes2, Frank Wenzhofer10, Matthias Wietz6 and Antje Boetius2, (1)Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany, (2)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (3)Max Planck Institute for Marine Microbiology, HGF-MPG Group for Deep Sea Ecology and Technology, Bremen, Germany, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Climate Sciences, Bremerhaven, Germany, (5)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Polar Biological Oceanography, Bremerhaven, Germany, (6)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, (7)Alfred Wegener Institute, Polar Biology, Bremerhaven, Germany, (8)Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany, (9)Faroe Marine Research Institute, Environment, Torshavn, Faroe Islands, (10)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, HGF-MPG Joint Research Group for Deep-Sea Ecology and Technology, Bremerhaven, Germany
OB53B-05
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 Poteau5, Peng Zhan7, Ibrahim Hoteit8,9 and Burton H Jones3, (1)KAUST- King Abdullah University of Science and Technology, Marine Science, Thuwal, Saudi Arabia, (2)Plymouth Marine Laboratory, Plymouth, United Kingdom, (3)King Abdullah University of Science and Technology, Marine Science, Thuwal, Saudi Arabia, (4)King Abdullah University of Science and Technology, Division of Physical Science and Engineering, Thuwal, Saudi Arabia, (5)Sorbonne Université, CNRS, Laboratoire d’Océanographie de Villefranche (LOV), 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)Southern University of Science and Technology, Shenzhen, China, (8)King Abdullah University of Science and Technology (KAUST), Department of Earth Sciences and Engineering, Thuwal, Saudi Arabia, (9)King Abdullah University of Science and Technology, Physical Sciences and Engineering Division, Thuwal, Saudi Arabia
OB53B-06
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 Stein2, Axel Timmermann2, John P Dunne3, Sarah Schlunegger4 and Richard Slater4, (1)IBS Center for Climate Physics, Pusan National University, Busan, South Korea, (2)Center for Climate Physics, Institute for Basic Science, Busan, South Korea, (3)NOAA Geophys Fluid Dynamic, Princeton, United States, (4)Princeton University, Atmospheric and Oceanic Sciences, Princeton, NJ, United States
OB53B-07
The Effect of Modelling Mechanistically Phytoplankton Photo-physiology on the Seasonal Cycle of Primary Production in Polar Regions (652287)
Eva Alvarez1,2, Onur Karakuş1 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
OB53B-08
Seasonal cycles of plankton ecology and CO2: subpolar lessons from satellite data and coupled climate models (657982)
Irina Marinov1, Shunzi Lu1, Priya Sharma2, Anna Cabre3 and Behzad Asadieh2, (1)University of Pennsylvania, Department of Earth and Environmental Science, Philadelphia, United States, (2)University of Pennsylvania, Philadelphia, PA, United States, (3)University of Pennsylvania, Earth and Environmental Science, Philadelphia, United States
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