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Using Data to Explore Ocean Processes PowerPoint Presentation
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Using Data to Explore Ocean Processes

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Using Data to Explore Ocean Processes

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  1. Using Data to Explore Ocean Processes Koshland Science Museum of the National Academy of Sciences

  2. + CTD Niskin Bottles Conductivity Temperature Depth

  3. 10m 75m 125m

  4. Fluorescence 0 0.1 0.2 0.3 04 0.5 0.6 0.7 0.8 0.9 1.0 Temperature (ITS-90) 0 5 10 15 20 25 30 0 200 400 600 800 1000 Depth (m) 34 .0 34.25 34.50 34.75 35.0 35.25 35.5 Salinity (PSU) 0 25 50 75 100 125 150 175 200 225 250 Oxygen uMol/kg

  5. Phytoplankton form the base of the marine food web!

  6. Photosynthesis CO2 Carbon dioxide + H2O Water + nutrients  e.g., nitrate, phosphate + O2 Oxygen Organic carbon Organic carbon Respiration and Decomposition CO2 + Carbon dioxide H2O + Water nutrients  e.g., nitrate, phosphate + O2 Oxygen

  7. Marine Nitrogen Cycle Nitrogenous base

  8. Grazing Photosynthesis Respiration or Death Inorganic Nutrients (NO3, PO4) Dissolved Organic Matter e.g., ATP, lipids, sugars, proteins

  9. Long-term Oceanographic Research • Hawaii Ocean Time-series (HOT) • Started in October 1988 • Scientists measure a wide range of variables in the Pacific Ocean

  10. http://hahana.soest.hawaii.edu/hot/hot-dogs/interface.html

  11. Time (year) Horizontal Profiles  Time-series  Bottle

  12. Let’s change the grouping Highest oxygen during the spring Oxygen peak in 1991 Horizontal Profiles  Time-series  Bottle

  13. Summary • Scientists use technology, like CTDs, to study the ocean. • Phytoplankton play important roles in food production and chemical cycling. • Time-series are valuable for understanding large-scale ocean processes.