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Lecture 1: OCN400 Chemical Oceanography Prof: Jim Murray TA: Nemiah Ladd

Lecture 1: OCN400 Chemical Oceanography Prof: Jim Murray TA: Nemiah Ladd Introduce Murray and Ladd 2. Who are the Students? 3. Syllabus / Text (Emerson and Hedges) 4. Course web site: http: // www.ocean.washington.edu /courses/oc400/ 4. Themes for course

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Lecture 1: OCN400 Chemical Oceanography Prof: Jim Murray TA: Nemiah Ladd

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  1. Lecture 1: OCN400 Chemical Oceanography • Prof: Jim Murray • TA: Nemiah Ladd • Introduce Murray and Ladd • 2. Who are the Students? • 3. Syllabus / Text (Emerson and Hedges) • 4. Course web site: http://www.ocean.washington.edu/courses/oc400/ • 4. Themes for course • 5. What do we want students to be able to do? • 6. How will we know what they can do? • Problem Sets (7), Paper Discussions (5), Mid-Term (1) • 7. Course Activities / Materials • 8. Greatest Challenges for Students

  2. Four Main Themes • Global Carbon Cycle • Are humans changing the • chemistry of the ocean? • 3.What are chemical controls and tracers • for biological production? • 4. What is the fate of organic matter • made by biological production?

  3. Global Carbon Cycle

  4. Global Carbon Cycle Sabine et al. (2004) SCOPE Reservoirs and Fluxes

  5. Mauna Loa CO2 record – Started by David Keeling (SIO) Latest CO2 Reading 397.57 ppm January 03, 2014 NOAA-ERL Data

  6. Source of anthropogenic CO2

  7. Vostok Record Law Dome Record Mauna Loa Record IPCC IS92a Scenario Projected (2100) CO2 Concentration (ppmv) Current (2001) (BP 1950) Source: C. D. Keeling and T. P. Whorf; Etheridge et.al.; Barnola et.al.;(PAGES / IGBP); IPCC

  8. Carbon Tracker Atmospheric CO2 from 800,000 years ago to the present http://www.youtube.com/watch?v=bbgUE04Y-Xg

  9. Are Humans Changing the Composition of the Ocean? Yes, in may ways! Examples include: Ocean Acidification Lead distributions Nitrate distributions Fukushima radionuclides

  10. Global Anthropogenic CO2 Inventory = 118±19 Pg C Because the ocean mixes slowly, half of the anthropogenic CO2 stored in the oceans is found in the upper 10% of the ocean. Sabine et al. Science (2004)

  11. Chemistry, Biology and Circulation

  12. Nitrate concentrations High Nutrient-Low Chlorophyll regions:

  13. Fate of Organic Matter

  14. CO2 CO2 CO2 Preindustrial CO2: maximum strength bio pump: 160 ppm Preindustrial CO2: Physical pump alone: 400 ppm Oceanic Primary Production: Sept. 97 – Aug. 98 Biological Pump Physical (solubility) Pump Source: JGOFS / IGBP

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