Introduction to Oceans
Course Development
- Why important? /spatial scale of the ocean
- Water and seawater; density
- Ocean basins and margins
- Changing land/ocean arrangement
- Water in motion (physics of circulation, waves, tides)
- Coast features; seafloor sediments; chemistry
- Life in the sea
- Humans and the ocean (fisheries, pollution, etc)
- Carbon cycle: natural and human forced
- Other oceans
MENU:
- Why important?
- Brief overview of early exploration
- Water and seawater
Why is understanding the ocean relevance and interest to society?
- Natural resources
- Life in the sea
- Trade/commerce
- Influences weather
- Recreation
- Exploration/learning
- Timescale of circulation/rapid change & global warming evidence
- National security
- Renewable sources of energy
- Research origin of life
- Expansion of living space
- Photosynthesis in ocean
- Carbon cycle: ocean - atmosphere
- Aesthetic value
- Medical research
- Natural disaster
- Cosmetics
- Coastal erosion
- Waste disposal
- Response time
- Food
Voyaging: population of Polynesia
Began 30000BC
Philippines 20000 BC
Tonga, Samoa, Solomons 900-800 BC
Polynesia 300-600 AD
Hawaii - Easter Is 450-600 AD
How did they do it?
Wave patterns
Flights of birds at dusk
Distant clouds
Temperature
Smell of water/life
Color of water
Sea life
Stars
Involuntary voyaging wars
Natural disasters
Magallen
First circumnavigation of the Globe. Benefitted from Chinese Compass/Rudder and middle eastern mathematics
Charting
Latitude equal divisions know through celestial navigation
Longitude: known by difference between the time of solar noon (local) and the noon at the "prime meridian"
First Successful chronometer
Needed to get Longitude right.
Development of accurate clocks was driven by the life and death consequences of not knowing longitude location.
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