Lecture 1: OCN520 Chemical Oceanography

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Lecture 1 OCN520 Chemical Oceanography Prof
Jim Murray
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• Four Main Themes
• Global Carbon Cycle
• Are humans changing the
• chemistry of the ocean?
• 3.What are chemical controls
• on biological production?
• 4. What is the fate of organic matter
• made by biological production?

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Global Carbon Cycle
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Mauna Loa CO2 record Started by David Keeling
(SIO)
NOAA-ERL Data
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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
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Global Carbon Cycle
Sabine et al. (2004) SCOPE
Reservoirs and Fluxes
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Are Humans Changing the Composition of the
Ocean Ocean Acidification
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Global Anthropogenic CO2 Inventory 11819 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)
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Chemistry, Biology and Circulation
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Nitrate concentrations High Nutrient-Low
Chlorophyll regions
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Fate of Organic Matter
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Biological Pump
Physical (solubility) Pump
Source JGOFS / IGBP
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