History of Marine Science - PowerPoint PPT Presentation

Loading...

PPT – History of Marine Science PowerPoint presentation | free to view - id: 728860-ZjFmO



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

History of Marine Science

Description:

History of Marine Science Unit 2 – PowerPoint PPT presentation

Number of Views:112
Avg rating:3.0/5.0
Slides: 33
Provided by: ems108
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: History of Marine Science


1
History of Marine Science
  • Unit 2

2
Voyaging
  • Travelling for a specific purpose
  • First navigation was by celestial navigation-
    finding ones position in reference to heavenly
    bodies.
  • First Voyages
  • 4000 BC Egyptians organize commerce on Nile
  • 800 BC first cartographers make ocean charts

3
Library at Alexandria in Egypt
  • First university
  • Housed scrolls copied by law off ships that
    harbored.
  • Eratosthenes
  • Librarian whom calculated circumference of Earth.
  • Realized if the sun was directly over one place
    (shining straight down), and over another place
    (shining at an angle) then the Earth must be
    curved
  • Estimated Earth size within 8 of true value.
  • Developed longitude and latitude
  • present day longitude and latitude was developed
    by Hipparchus in 120 BC
  • Hypatia
  • Last librarian
  • First woman recognized as mathematician,
    philosopher, and scientist
  • Murdered
  • library burned because of religious opposition to
    knowledge-Incalculable loss

4
Research Vessels
  • Submersibles
  • small underwater vehicles
  • ROV
  • remotely operated vehicle
  • Bathysphere
  • lowered by a cable from a ship
  • Drilling ships
  • take sediment cores
  • Floating and Fixed platforms (FLIP floating
    instrument platform)
  • -gather data like temperature, salinity, density,
    and weather patterns

5
ROV
bathysphere
submersible
6
Fixed platform
Drilling ship
Floating platform
7
Other Research Instruments
  • Airplanes
  • Satellites
  • SEASAT 1st satellite dedicated to ocean
    studies
  • Echo-sounding
  • Underwater cameras
  • Side scan sonar
  • great for sunken ships

8
The Egyptians
  • The Egyptians established sea trade throughout
    the Indian Ocean as early as 2300 B.C.
  • ca 1938 - 1756 B.C. built the canal, the Isthmus
    of Suez, to navigate ships across land.
  • It operated until 775 A.D.

http//search.eb.com.ezproxy.uhd.edu/eb/article-22
787
9
The Phoenicians
  • Phoenicians (from the Middle East)
  • Sailed around Africa in 590 B.C.

A stone carving from the 1st century AD shows the
kind of ship that the Phoenicians used on the
Mediterranean Sea
10
The Greeks
  • Greeks
  • Herodotus published accurate map of Mediterranean
    region, ca 450 B.C.
  • Alexander the Great, 336 B.C. Developed trade
    routes throughout the Mediterranean and expanded
    their empire under Alexander the Great

http//www.henry-davis.com/MAPS/Ancientimages/109.
JPEG
11
The Greeks
  • 200 B.C. Eratosthenes
  • mathematically calculated the circumference of
    the Earth to be 40,000 km.
  • It actually is 40,032 km.
  • 2,200 years ago his math was good enough to be
    off only 32 km!
  • Eratosthenes knew that at noon on the summer
    solstice the Sun is directly overhead at Syene (a
    city)
  • He also knew the distance between Syene and
    Alexandria (another city)
  • combined with his measurement of the solar angle
    a between the Sun and the vertical, he was able
    to calculate Earth's circumference.
  • From Encyclopædia Britannica, Inc.

12
The Arabs
  • ca 200 B.C Islamic and Arab Merchants
  • Experienced sailors
  • traded throughout the Mediterranean and Indian
    Oceans.
  • They are believed to have invented the lateen
    sail
  • triangular sail important in early navigation.

http//search.eb.com.ezproxy.uhd.edu/eb/art-12539/
A-lateen-rigged-ship-used-by-Arab-merchants
13
Science Voyaging Middle Ages
  • 900 A.D. The Vikings crossed the North Atlantic
    to colonize Iceland, Greenland, and Newfoundland
  • using the North Star to determine latitude

Exhumed Viking ship Viking Ship Museum, Oslo,
Norway.
14
Science Voyaging 15th Century
  • Chinese
  • Sailed to influence and impress their neighbors.
  • 1492 Columbus
  • Sailing for Spain, sailed the Atlantic and
    discovered the Americas.
  • 1497 Vasco de Gama
  • Sailing for Portugal, sailed around Africa from
    Portugal to India to establish trade routes.
  • Europeans searched for the Northwest passage
    through northern Canada to trade with Asia
    explored the Arctic.

15
Science Voyaging 16th Century
  • 1519 - Portuguese explorer Ferdinand Magellan
  • the 1st European expedition to circumnavigate the
    world.
  • 237 men began the voyage 18 returned.
  • Magellan actually died before the journey was
    finished, but his crew returned in 1522.

http//www.solarnavigator.net/history/explorers_hi
story/ferdinand_magellan_charcoal_fur_robe.jpg
16
Science Voyaging 18th Century
  • John Harrison in 1728 developed the first
    chronometer.
  • This was a timepiece governed by a spring instead
    of a pendulum
  • allowed longitude to be known
  • 4 are still located in Greenwich, England, which
    is the 0 meridian.
  • If your noon is before Greenwich noon then you
    are to the east, if your noon is after Greenwich
    then you are to the west.
  • Latitude can be known by stars (angle between
    your eyes, horizon and north star).

17
Science Voyaging 18th Century
  • 1762 American Ben Franklin
  • created a chart of the Gulf Stream.
  • The Gulf Stream gives the US its warm climate,
    bringing warm water north from the equator.

18
Science Voyaging 18th Century
  • 1768 James Cook of the British Royal Navy
  • First marine scientist
  • charted New Zealand, many islands, and the Great
    Barrier Reef of Australia sailing upon the HMS
    Endeavor.
  • Recorded and successfully interpreted natural
    history, anthropology, and oceanography with
    accuracy and thoroughness.
  • Insisted on cleanliness and made his men eat
    limes to ward off scurvy (Vitamin C deficiency)

19
Science Voyaging 19th Century
  • 1831 Charles Darwin
  • HMS Beagle
  • Explored Galapagos Islands
  • led to the origin of species and the modern
    theories of evolution.

http//uk.gizmodo.com/charles_darwin_l.jpg
20
Science Voyaging 19th Century
  • 1838 US began the US Exploring Expedition with
    the unpopular Lt. Charles Wilkes
  • Expedition was to gain knowledge and disprove
    theory that Earth was hollow and there were holes
    in the poles.
  • Information obtained made up 19 volumes of maps,
    text, and illustrations.
  • 1840 Matthew Maury of US Navy
  • Father of Oceanography
  • used sounding with a weighted line to discover
    the Mid-Atlantic Ridge, a hidden range of
    underwater mountains
  • Made charts and sailing directions
  • 1855 published the Physical Geography of the Sea
  • Monument in Richmond, VA

21
Science Voyaging 19th Century
  • 1872-1876 Charles Wyville Thomson and John Murray
    (who coined the term oceanography)
  • set out on famous HMS Challenger Expedition for
    British
  • Took samples and disproved theory that there were
    no organisms below 1,800 feet due to pressure and
    lack of light.
  • Discovered 4,727 new species, tested water, made
    soundings, 151 trawls, currents, meteorology,
    sediments, and charted reefs.
  • The first pure oceanographic investigation that
    stimulated the science of marine biology.
  • Complied a 50 volume set of information still
    used today
  • gathered more data in its time than all other
    data to date.
  • Expedition is also still ongoing today and is
    considered the first only for science
    expedition
  • this is the voyage that discovered the worlds
    deepest ocean trench, the Marianas Trench, now
    sometimes called the Challenger Deep.

22
Science Voyaging 19th Century
  • The map below shows the
  • routeof HMS Challenger(in red)
  • the expedition lasted 1,000
  • days and covered more than
  • 68,000 nautical miles.
  • 1895 Fridtjof Nansen
  • studied the polar oceans aboard the Fram, a ship
    built to withstand crushing ice
  • confirmed the relationship between whales and
    plankton- from a whaling stand point

23
Science Voyaging 20th Century
  • 1898 John Holland invents 1st gas engine/battery
    powered submarine
  • bought by US government in 1900.
  • The world wars were the catalyst for US
    oceanographic research
  • Development of technology including electronic
    equipment, deep sea drilling programs, (1916)
    SONAR, use of GPS (global positioning system) and
    satellites.

24
Science Voyaging 20th Century
  • 1914 British explorer Sir Ernest Shackelton
    aboard the Endurance
  • pursues a dream of crossing Antarctica on foot by
    way of the South Pole.
  • 1925 German Meteor Expedition
  • the first to use echo sounding (depth and
    contour) to discover that the ocean was rugged,
    not flat as thought.
  • 1943 Jacque Cousteau and Emil Gagnan
  • invent the aqualung

25
Science Voyaging 20th Century
  •  1960 Jacque Piccard and Don Walsch in the US
    Trieste bathyscaphe (small submarine)
  • descend 35,801 ft. into the deepest part of the
    ocean within the Marianas trench
  • NO ONE HAS BEEN BACK SINCE!

26
  • ".... I saw a wonderful thing. Lying on the
    bottom just beneath us was some type of flatfish
    Even as I saw him, his two round eyes on top of
    his head spied us
  • Why should he have eyes? Merely to see
    phosphorescence?...Here, in an instant, was the
    answer that biologists had asked for the decades.
    Could life exist in the greatest depths of the
    ocean? It could! - J. Picard

27
Science Voyaging 20th Century
  •  1962 Alvin
  • Designed by Woods Hole Oceanographic Institute
  • First deep sea submersible to carry passengers
  • has traveled around the world completing 4,162
    dives.
  • has mechanical arms and in 1966 helped to locate
    a H-bomb that was lost in the Mediterranean Sea.
  • In 1979 discovered black smokers on the sea
    floor.

28
  • Black Smokers" are named for the soot-like
    appearance of the ejected material billowing out
    of the "chimneys".
  • Super-heated water from the Earths crust with
    very high concentrations of dissolved minerals.
  • As the super-heated water meets the very cold
    ocean-bottom water, the dissolved minerals
    precipitate out and settle onto the rock around
    them.
  • This causes the chimneys to grow in height over
    time.

29
Science Voyaging 20th Century
  •  1968 Glomar Challenger
  • confirmed evidence of seafloor spreading and
    plate tectonics from core drilling samples.

30
Science Voyaging 20th Century
  • 1985 JASON (a satellite)
  • found and documented the wreck of the Titanic.
  • JJ attached to Alvin to go inside the ship
  • 1989 - Japan launched the Shinkai 6500
  • - can carry a crew without a tether (rope) up
    to 21,414 ft deep into the ocean (a world
    record).

31
Science Voyaging 21st Century
  • In 2006, a Chinese mineral company (COMRA)
    designed a craft to reach 23,000 ft

32
Conclusion
  • The ocean represents the Earths last frontier
    for exploration and the key to understanding the
    future of our planet.
  • The human race depends on the life and
    sustainability of the ocean for economic,
    biological, and environmental stability.
  • The world of Aquatic science is ever reaching for
    new discoveries in this blue realm.
About PowerShow.com