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History of Ocean Exploration
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19
Other
Undergraduate 2
09/23/2012

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Cards

Term
Why explore?
Definition
Resources
War/famine
Disease/epidemic
Term
Polynesians
Definition
First explorers
30,000 years ago, started migrating across the pacific
Hawaiian islands, papa new guinea, phillipines
Term
Early Navigation
Definition
Reflection of islands in the clouds
Followed birds
Stars
Swells
Stick charts
Smell of water
Term
Kontiki
Definition
Thor Heyerdahl
Tried to mimic what early explorers were doing --- 1940’s
Term
Greek Exploration
Definition
Herodotus
Navigation limited to medit. Sea
Red sea: phytoplankton dominated
Eratosthenes---dis. Accurate circumference of world
• Difference from Alexandria, syene 7 degress
• 40,032 km =world
Term
Vikings
Definition
Erik the R. : Discovered Greenland
Bjarni Herjolfson: 1st to see newfoundland
Leif Eriksson: discovered north america
Term
Zheng He (1371-1433)
Definition
Sophisticated vessels
Massive expedition
Scurvy prevention with Vit. C
Grow vegetables on there boat
Term
US Exploring Expedition (US Ex Ex)
Definition
Explored the coast of Antarctica
Mapped the Oregon territory and San Fran Bay
Thoroughly explored Hawaii
Lt. Charles Wilkes
Details on currents, temps, changes in water
Term
Lt. Matthew Maury
Definition
Father of Oceanography
Tract how tides change/winds
Notice sea state
Physical Geography of the Sea
1st person to devote full time to the study of the ocean
movement from gentleman’s hobby → career in oceanography
Term
Challenger expedition
Definition
led by charles wyville thompson
Wanted to understand ocean: chemistry, animals,
70,000 nautical miles in n. and s. Atlantic and pacific
found marianas trench in w. pacific
depth of water
chemical/physical examination of water
tow net
temperature observations
motivation: is there life at depth, Darwin (origin of species)
133 dredges
discovered 4,700 new species
Term
Edward Forbes
Definition
Azoics Theory: no life in the deep ocean (greater than 550 m)-false
Term
Fridtjof Nansen
Definition
Neurobiologist, nobel peace prize, alpine skiing
Cross Greenland ice sheet
Siberia drift wood --→ water under artic ice
Boat built to cut in ice for north pole provisions for 5 year
Drifted 2km per day got within 250 miles of the pole
Term
Woods Hole:
Definition
US fish commission, instit. For science
NOA: national ocean and atmospheric
MBL:Marine Biological Library
Term
Bathysphere
Definition
William Beebe and Otis Barton built
Dropped 900 m into the ocean
Term
Trieste
Definition
Walsh and Piccard 1960’s
go down to Marrianas trench US Navy
6 hours to get down
Term
Alvin
Definition
Safely transported over 2500 researchers on more than 4400 dives to depths of 14000
Term
JOIDES
Definition
Joint Oceanographic institutes for Deep earth sampling ship that takes sample of ocean sediment
Term
Satellites
Definition
measure:
Ocean height
Waves
Temperature
Chl a (plant productivity)---chlorophyl
bacteria/viruses
Term
Ocean observing system
Definition
Buoys
Pioneer array
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