OS22A:
Eastern Boundary Upwelling Systems: Natural Laboratories for Studying the Impacts of Multiple Stressors on Marine Ecosystems I


Session ID#: 8570

Session Description:
The major Eastern Boundary Upwelling Systems are among the most productive areas in the world ocean supporting important fisheries. Their high productivity is intimately linked with shallow, intense Oxygen Minimum Zones (OMZs), which have high CO2 concentrations, low pH values, and shallow aragonite saturation horizons. When these waters upwell and impinge on the euphotic zone, they impact the surface ecosystem and release CO2 and N2O, strong greenhouse gases, to the atmosphere. The EBUS-OMZs are also characterized by strong submeso- and mesoscale variability and intense nitrogen and sulphur cycling associated with microbial activity, also influencing the structure and functioning of the ecosystem, as well as greenhouse gas production. Improving projected evolution of ocean deoxygenation in the EBUS depends on a comprehensive understanding of the relationships between climate variability, upwelling dynamics, the marine ecosystem and atmospheric chemistry. We solicit presentations that address the underlying dynamics of EBUS-OMZs from   modeling and observational approaches.
Primary Convener:  Ivonne Montes, Instituto Geofísico del Perú, Lima, Peru
Conveners:  Francisco Chavez, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, Boris Dewitte, LEGOS, Toulouse, France and Veronique Garcon, CNRS-LEGOS, Toulouse, France
Chairs:  Ivonne Montes, Instituto Geofísico del Perú, Lima, Peru, Francisco Chavez, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States and Veronique Garcon, CNRS-LEGOS, Toulouse, France
OSPA Liaison:  Veronique Garcon, CNRS-LEGOS, Toulouse, France

Cross-Listed:
  • A - Atmospheric Sciences
  • B - Biogeosciences
Co-Sponsor(s):
  • IGBP: International Geosphere-Biosphere Programme -
Index Terms:

3339 Ocean/atmosphere interactions [ATMOSPHERIC PROCESSES]
4516 Eastern boundary currents [OCEANOGRAPHY: PHYSICAL]
4520 Eddies and mesoscale processes [OCEANOGRAPHY: PHYSICAL]
4834 Hypoxic environments [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]

Abstracts Submitted to this Session:

Eastern Boundary Upwelling Ecosystems: Review and Observing Needs (81369)
Francisco Chavez, Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States, Veronique Garcon, CNRS-LEGOS, Toulouse, France, Boris Dewitte, LEGOS, Toulouse, France and Ivonne Montes, Instituto Geofísico del Perú, Lima, Peru
Resolving Phytoplankton Diversity, Growth and Mortality in an Eastern Boundary Upwelling System (Invited) (67565)
Alexandra Z Worden1,2 and Valeria Jimenez2,3, (1)Marine Biological Laboratory, Woods Hole, MA, United States, (2)University of California Santa Cruz, Ocean Sciences, Santa Cruz, CA, United States, (3)Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States

The seasonal California Undercurrent variability off Baja California: A numerical model (80678)

Felipe Gómez-Valdivia, CICESE, Ensenada, Mexico and Alejandro Pares-Sierra, Centro de Investigación Científica y de Educación Superior de Ensenada, San Diego, CA, United States
Chemical and Biological Impacts of Ocean Acidification Along the West Coast of North America (Invited) (74770)
Richard A Feely, NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States, Simone R Alin, NOAA, Seattle, United States, Brendan Carter, NOAA Pacific Marine Environmental Laboratory, Seattle, United States and Nina Bednarsek, University of Washington, School of Marine and Environmental Affairs, Seattle, WA, United States
Retention controls on-shelf hypoxia in coastal upwelling systems (81787)
Cheryl S Harrison1, Matthew C Long2, Burke R Hales3, Samantha A Siedlecki4 and Roger M Samelson3, (1)Louisiana State University, Baton Rouge, LA, United States, (2)[C]Worthy, LLC, Boulder, United States, (3)Oregon State Univ, Corvallis, OR, United States, (4)Univ of Washington-JISAO, Seattle, United States
Seasonal advection of Pacific Equatorial Water alters oxygen and pH in the Southern California Bight (82996)
Yuichiro Takeshita, Carnegie Institution for Science Stanford, Global Ecology, Stanford, CA, United States, Christina Frieder, University of Southern California, Biological Sciences, Los Angeles, CA, United States, SungHyun Nam, Seoul National University, Research Institute of Oceanography, Seoul, South Korea and Todd R Martz, University of California San Diego, La Jolla, CA, United States
Ocean-Atmosphere-Land interactions and their consequences on the biogeochemical variability in Eastern Boundary Upwelling System (82075)
Lionel Renault1, James C. McWilliams2, Curtis A. Deutsch3 and Maarten J Molemaker2, (1)University of California Los Angeles, Los Angeles, CA, United States, (2)University of California, Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States, (3)University of Washington Seattle Campus, School of Oceanography, Seattle, United States
The Influence of Natural Variability on Future California Current Upwelling (86693)
Riley Xavier Brady, University of Colorado at Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, CO, United States, Ryan R Rykaczewski, University of South Carolina, Columbia, SC, United States and Michael A Alexander, NOAA Boulder, ESRL/PSD, Boulder, CO, United States

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