Introduction Course overview History of Oceanography Origin of earth, ocean, atmosphere
Interdisciplinary Biology Chemistry Physics Geology Geography Political Science Mathematics Computer Science
History of Oceanography Early Age of Discovery Science and the Oceans Modern Oceanography Different motivations at different times
Early history Reasons: trade, fishing, defense Self centered view of Earth Examples Dates included for discussion purposes Some examples from book, others added
Early history (2) Around edges of Mediterranean Sea Phoenicians (approx. 1000 BC) Greeks (approx. 500 BC) Pytheus – latitude, tides Erasthosthenes (working in Egypt) – circumference of earth
Early history (3) Romans – Ptolemy as example Approx. 150 AD Ocean more vast than thought Used both latitude and longitude Middle Ages: very little exploration except Vikings (approx. 1000 AD) Arabs Polynesians (300-600 AD most important)
Age of Discovery (1) Travel for economic, political and religious reasons Portugal: Prince Henry Vasco Da Gama (1498)
Age of Discovery (2) Spain Columbus (1492) Balboa (1513) Magellan (1522)
Age of Discovery (3) Discovery with some science James Cook (1768-1780) Endeavour, Resolution, Adventure Ben Franklin (1769) Matthew F. Maury (early 1800s) Charles Darwin (early 1800s)
Purely scientific Challenger Expedition (1872-1876) Extremely significant
More for science Voyages of Nansen aboard Fram (end of 1800s)
Modern Oceanography (20th century) International Interdisciplinary Scientific Complex instruments “Modern” technology
History of the Earth Approx. 4.5 billion years old Nebular hypothesis……all of our solar system was “formed” from the same cloud of dust Gravitational forces
Earth (cont.) Separation of earth’s material by density Layered Earth….most dense in core, less dense mantle, less dense crust…..density stratification Ocean and atmosphere formed as a result of out-gassing from Earth’s interior
Comparison of ocean basins Atlantic Pacific Indian Arctic Southern Ocean Much left to students