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Bering Sea Ecosystem Study

Bering Sea Ecosystem Study. Changing Climate Seasonal sea ice has retreated over last two decades (1970 - 2002). ♦. Maximum ice extent. Percent ice cover within gray box on map above. P. Stabeno & J. Overland, PMEL.

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Bering Sea Ecosystem Study

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  1. Bering Sea Ecosystem Study

  2. Changing Climate Seasonal sea ice has retreated over last two decades (1970 - 2002) ♦ Maximum ice extent Percent ice cover within gray box on map above P. Stabeno & J. Overland, PMEL

  3. Vertically Averaged Water Temperature (°C) at M2 P. Stabeno, PMEL

  4. What is BEST ? • Mechanistic and Predictive Program: Designed to understand and predict the consequences of climate change for Bering Sea marine ecosystems • End to End Approach: Climate, physics, primary production, zooplankton, fish, birds, marine mammals and people

  5. Assembling an End-to-End Program • - Atmosphere / Ocean • Local Physics • Phys - Biol Coupling • Food Web Interactions • Harvesting / Fisheries • Socioeconomic Aspects • Modeling Activities • Field Research • Retrospective Studies www.arcus.org/bering/

  6. BEST Priority Research Modules • How is the Disappearance of Sea Ice Affecting the Bering Sea Ecosystem? • What Controls the Abundance of Nutrients on the Shelf and What is the Influence of Climate Variability? • What will be the Ecosystem Effects of a Warmer and More Stratified Bering Sea?

  7. First Phase (2007-2010): Sea Ice P. Stabeno, PMEL

  8. Winter Sea Ice Cover Index (1954 – 2005) +2 +1 0 -1 -2 http://www.beringclimate.noaa.gov 1960 1970 1980 1990 2000 Loss of Winter Sea Ice Winter-time (MONTHS) sea ice has vanished from the Bering Sea over the last five decades (1954 - 2005) P. Stabeno & J. Overland, PMEL

  9. Anticipated Long-term Change Warmer Everywhere Arctic vs. Antarctic asymmetry Decline in sub-polar surface salinity Sarmiento et al. (2004) Response of ocean ecosystems to climate warming. Global Biogeochemical Cycles 18 (3). GB3003

  10. February March April May June Ice, Wind, Bloom, Copepods Early Ice Retreat Late Bloom, Warm Water – Large Copepod Biomass Late Ice Retreat Early Bloom, Cold Water – Small Copepod Biomass G. Hunt, UW - SAFS

  11. Graph Courtesy of Jeff Napp

  12. Integrated Bering Sea Ecosystem Study BASIS (NPAFC) NPCREP LOSI AFSC NMML PMEL OPP Arctic Natural & Social Sciences USFWS USGS

  13. Beyond the Bering Sea Integrated Bering Sea Ecosystem Study

  14. http://www.arcus.org/Bering

  15. Lower Trophic Level Session Poster Presentations Mark Benfield, Nicola Hillgruber, Philippe Grosjean, Marianne Alford, Sara Arndt, Jeffrey Bacon, and Sean Keenan Semi‑automated Processing of Bering Sea Zooplankton Samples Using ZOOIMAGE Software Clara Deal, M. Jin, J. Wang, and T. Whitledge An Ecosystem Model Study of Plankton and Nutrient Dynamics in the Bering Sea Shelf with a Focus on the Nitrogen Budget and Water Column Nitrification Lawrence Schaufler, and Jeff Napp Fatty Acid Composition of Mesozooplankton From The Bering Sea

  16. Lower Trophic Level Session Oral Presentations George Hunt - Bering Ecosystem Study (BEST) Kohei Mizobata - Biochemical enhancement related to mesoscale eddies in the Bering Sea Green Belt Jeffrey Napp - Regulation of Zooplankton Standing Stock and Production in the SE Bering Sea: Top-Down v. Bottom-Up Control and Recent Climate-Related Declines in a Subarctic Ecosystem Lisa Eisner - Variations in physical and biological oceanography and forage fish distributions during fall in the eastern Bering Sea

  17. BEST Information Sources • Web Site: http://www.arcus.org/Bering/index.html • Science Plan, available in Hard Copy at: Arctic Research Consortium of the U.S. (ARCUS) 3535 College Road, Suite 101, Fairbanks, AK 99709 Phone: 907-474-1600; Fax: 907-474-1604 • Planning Group. c/o George L. Hunt, Jr. School of Aquatic & Fishery Sciences University of Washington, Seattle Email: geohunt2@u.washington.edu

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