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Using Data to Explore Ocean Processes

Dive into the world of marine science and oceanography by exploring data collected using CTD Niskin Bottles to study processes like photosynthesis, respiration, and the marine nitrogen cycle. Learn about the Hawaii Ocean Time-series project started in 1988, measuring variables in the Pacific Ocean.

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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.

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