The Growth of Oceanography

Transcription

1 The Growth of Oceanography

2 Why study oceanography? Scientific Curiosity How do oceans operate and interact with entire earth system?

3 Why study oceanography? Scientific Curiosity How do oceans operate and interact with entire earth system? Need for Marine Resources We need both food and mineral resources from oceans to survive.

4 Why study oceanography? Scientific Curiosity How do oceans operate and interact with entire earth system? Need for Marine Resources We need both food and mineral resources from oceans to survive. Impact on Human activities Must maintain a balance between nature and human activities to protect the coastal zones, prevent over polluting, ensure safe transportation/recreation on the world s oceans and better prepare for natural hazards.

5 Historical Review of Oceanography There are three major stages in the history of ocean research: 1. Ocean exploration was the period when people explored the ocean boundaries.

6 Notable explorers include: Phoenicians - explored the eastern Atlantic Ocean reaching England and sailing around Africa.

7 Notable explorers include: The Greek Pytheas circumnavigated England and reached Iceland

8 Notable explorers include: The Polynesians- sailed and explored the western Pacific Ocean in log rafts.

9 Notable explorers include: Herodotus- prepared a world map in 450 BC illustrating three continents surrounded by a vast ocean.

10 Notable explorers include: The Vikings- dominated marine exploration during the Middle Ages reaching North America.

11 Notable explorers include: Bartholomew Diaz- reached the southern tip of Africa in an attempt to reach India in 1480s.

12 Notable explorers include: Vasco de Gama- reached India in 1498 by sailing around Africa.

13 Notable explorers include: An expedition led by Ferdinand Magellan, and continued after his death by Juan Sebastian Elcano, circumnavigated the globe from 1519 to 1522.

14 2. Early scientific investigations began when people began to describe the ocean.

15 Notable explorers include: James Cook In his ships the Endeavour, Resolution, & Discovery, made three voyages in the late 1700 s; these voyages: -Charted New Zealand -Mapped the Great Barrier Reef -Circumnavigated the Globe at high southerly latitudes (71 o S) - Discovered Hawaii Video: James Cook and Hawaii

16 Notable explorers include: John Harrison: in 1728 invented the chronometer, a clock that was spring driven, thus could work at sea and be used to determine longitude Video: The Chronometer

17 Notable explorers include: Matthew Fountaine Maury- published The Physical Geography of the Sea in 1855 and became known as the father of physical oceanography. He was also born in Virginia!

18 The Voyage of the HMS Beagle Charles Darwin was a naturalist aboard a 4 1/2 year voyage that began in 1831 and later led to Darwin s book Origin of Species Video: Darwin and The Beagle

19 3. Modern oceanography Began in the twentieth century with interdisciplinary oceanic research and use of complex scientific instruments.

20 HMS Challenger HMS Challenger 1872, first purely scientific sailing expedition; 4 year voyage discovered 4,717 new species Took global ocean salinity, temperature, and water density measurements The Challenger Report, a 50 volume set documenting the findings of the Challenger expedition provided the foundation for modern oceanographic study

21 Early Scientific Exploration In the 1920s the German vessel SMS Meteor studied the salinity, temperature, oxygen content, and sea floor topography of the South Atlantic.

22 Current Research Major institutions were established. In the U.S. these include: Scripps Institute of Oceanography, Woods Hole Oceanographic Institute, and Lamont Doherty Geological Observatory.

23 Current Research NOAA (National Oceanic and Atmospheric Administration) founded in 1970, government branch that conducts oceanography research and weather monitoring.

24 Current Research The National Aeronautics and Space Administration (NASA) has become an important institutional contributor to marine science through satellite technology. Jason-1 and TOPEX/Poseidon Satellites