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Cruise activities in the eastern Bering Sea during Healy 07-01 (BEST) (April 10 - May 12, 2007)

Cruise activities in the eastern Bering Sea during Healy 07-01 (BEST) (April 10 - May 12, 2007). Ray Sambrotto Lamont-Doherty Earth Observatory Palisades, NY sambrott@ldeo.columbia.edu. Bering Ecosystem Study.

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Cruise activities in the eastern Bering Sea during Healy 07-01 (BEST) (April 10 - May 12, 2007)

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  1. Cruise activities in the eastern Bering Sea during Healy 07-01 (BEST)(April 10 - May 12, 2007) Ray Sambrotto Lamont-Doherty Earth Observatory Palisades, NY sambrott@ldeo.columbia.edu

  2. Bering Ecosystem Study • What is the impact of the on-going decrease in seasonal sea ice on the eastern Bering Sea marine ecosystem? • How might this environmental change affect subsistence and commercial opportunities in the Bering Sea and local communities?

  3. Overarching BEST Questions Addressed (Social Science) • How might environmental change affect subsistence and commercial opportunities in the Bering Sea and the ability of groups to travel on ice and ocean? • How will communities (families, villages, regional organizations, boat captains and crew, cooperatives, processors, operators, managers, and policy makers) respond to these changes? • How will these changes in human use of the Bering Sea have reciprocal impacts on the Bering Sea ecosystem itself? (local, regional, or system-wide and relate to increased or decreased catch rates, pollution, and settlement)

  4. Who are we? Ray Sambrotto (LDEO) Dan Sigman (Princeton Univ.) Phyllis Stabeno (NOAA-PMEL) Cal Mordy (NOAA-PMEL) Jinfeng Wu (UAF) Al Devol (UW) David Shull (UWW) Jeff Napp (NOAA-PMEL) Alex DeRobertis (NOAA-AFSC) Peter Boveng (NOAA-AFSC) Carleton Ray (UVA)

  5. What will we be studying? • Ocean temperature and salinity and nutrients (sensors and water collection) • Ocean and sea ice iron concentrations • Primary Production • Zooplankton and fish distributions using nets and fish finders • Sediment (mud) nutrient fluxes (coring) • Ice seal abundance and tracking (on ice and from helos) • Walrus distribution (on ice and from helos) A seal with a tag

  6. Proposed Locations of Sampling(April 10 - May 12, 2007)

  7. Water collection and measurementswith CTD

  8. Collection of sediment cores

  9. Active Acoustic Activities • Acoustic Doppler Current Profiler (ADCP) • Fish acoustic sonars; 38 KHz & 120 KHz • Multibeam • Sub-bottom profiler • Sperry SRD 500 ship speed log • Pinger on hydro-wire (possible use) • Bridge sounder (possible use)

  10. Ice Distributions (from MODIS satl.)April 21 & May 8, 2004

  11. Major cruise components, HLY0701

  12. Marine Mammal operations, HLY0701

  13. Local Contacts

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