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Chapter 3

Chapter 3. Part 2. Do Now. 1) What is a thermocline 2) How does the graph look? (where are the axis and how are they labeled?) 3) What information do we get from a temperature profile?. Temperature profile. CTDs. Conductivity, temperature and depth in the water column

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Chapter 3

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  1. Chapter 3 Part 2

  2. Do Now • 1) What is a thermocline • 2) How does the graph look? (where are the axis and how are they labeled?) • 3) What information do we get from a temperature profile?

  3. Temperature profile

  4. CTDs • Conductivity, temperature and depth in the water column • Used along with other instruments. • Bathythermographs – measure temp but not salinity

  5. Complications w/ samples • What are some complications that scientists may face when collecting samples? • Hmm.. • Trying to get samples from multiple sites • Weather and climate variability

  6. Solutions • What are some solutions to these problems? • Hmm… • Instruments could drift with the currents • Use multiple ships at once • Satellites

  7. Dissolved Gases • Gasses dissolved in sea water: O2, CO2, N2 • Found in atmosphere • Gas exchange between ocean and atm. • Gases dissolve better in cold water • Oxygen is not very soluble • 1L of seawater: 0-8mL dissolved O2 • 1L of air: 210mL dissolved O2 • O2 in water is strongly affected by photosynthesis and respiration

  8. Dissolved Gasses • Most gasses produced by photosynthesis get released into the atm. • Carbon dioxide is more soluble than oxygen • Makes up more than 80% of the dissolved gas in the ocean.

  9. Transparency • One of the most important properties • Not all the colors of light penetrate to all depths of the ocean

  10. What do we notice?

  11. What else affects transparency? • Suspended and dissolved material • Plankton • Through what process do plankton produce oxygen • What is the “key” to these phytoplankton blooms happening? • What are the mixing of ocean layers caused by?

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