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Mercury Stable Isotope Investigations in San Francisco Bay: Key Findings and Proposal for Further Research

Summary of results from stable isotope investigations on sediments, fish, and atmospheric samples in San Francisco Bay. Proposal includes analyzing mercury isotopes in sediments, samples from Sacramento River Delta, urban run-off, deposition, and sport fish/sea-bird egg shells for tracing Hg sources.

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Mercury Stable Isotope Investigations in San Francisco Bay: Key Findings and Proposal for Further Research

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  1. Mercury Stable Isotope Investigations in San Francisco Bay: Summary of Results and Proposal for Additional Work Joel D Blum, Principle Investigator Gretchen E Gehrke, Graduate Student RMP Meeting, 7 June 2010

  2. Slide 1: Sediments paper Figure 4

  3. Slide 2: Sediments paper Figure 3

  4. Slide 3: Fish paper Figure 4

  5. Slide 4: Fish paper Figure 5

  6. Slide 5: Fish paper Figure S1-2

  7. Slide 6: Atmospheric summary Figure 3

  8. Slide 7: Atmospheric summary Figure 4

  9. Slide 6: Atmospheric summary Composite Figure

  10. Proposal: Continued Investigation of Mercury Stable Isotopes in San Francisco Bay • Hg isotope analyses of reactive inorganic mercury extracted from sediments. • 2. Hg isotope analyses of sediment from additional sample sites in the Sacramento • River Delta region. • 3. Hg isotope analysis of large-volume urban run-off samples. • 4. Hg isotope analysis of co-located samples of dry deposition, wet deposition and • gaseous elemental mercury at a single location in the Bay area. • 5. Hg isotope analyses of sport fish and sea-bird egg shells to gain information on • Hg sources to these organisms.

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