Marine History Notes

ONLY write the words in RED! You will also need the titles of the slides

3 reasons for early civilizations to interact with the oceans:

1. Food2. Trade3. Discovery

How did ancient civilizations navigate the oceans?

Did early civilizations have GPS?Celestial NavigationCurrents and WindsPoints of ReferenceSticks and Stones Maps

Longitude verse Latitude

Eratosthenes- Earth‘s cicumference; developed a system of latitude and longitude

Longitude- east-west position of a point on the Earth's surface

Pytheas- researched the Atlantic from Italy to Norway; determination of latitude

Latitude-north or south of the earth's equator

Prime Meridian verse Equator

John Harrison

Invented the chronometerCaptain James Cook used during his researchPermitted accurate knowledge of longitude

The Phoenicians

-2,000 - 400 B.C.-some of the first known explorers to leave

their local communities bordering the Mediterranean Sea

(Mediterranean Sea trade routes)-sailed along shore and open ocean-learned to follow the North Star at night-marine science knowledge they gained was

lost until after the dark ages.

Ships were so important to early Egyptians that the Pharoah buried an entire boat in the great pyramid

The Polynesians

300 - 1500 A.D.Used currents and winds to travel from

Hawaii to TahitiPrimitive mapping (Sticks and Stones Map)Earliest known regular, long distance open

ocean seafaring journey beyond the sight of land

Greeks

Used the sun, constellations, North star, and sea conditions for navigation

Used mathematical principlesNoticed tide patterns based upon moon

phases

-EXPLORED THE NORTH ATLANTIC FROM THEIR SCANDINAVIAN HOMELAND USING FAST AND STABLE SHIPS (WARSHIPS)-REACHED ICELAND, GERMANY, AND NORTH AMERICA-THEY HAD TO DEVELOP DETAILED KNOWLEDGE OF CURRENTS, WINDS, TIDES AND OCEAN PHENOMENA -LIEF ERIKSON- 1ST TO COME TO NORTH AMERICA

Vikings

Chinese

Invented the magnetic compassExtensive trade routesUsed large treasure ships with multiple masts2 key ship innovations:

Central rudders Watertight compartments

Captain James Cook

British captain that made 3 voyages to map the Pacific between 1768 - 1779.

Charted coasts of New Zealand and Australia - discovered Hawaiian Islands in 1778

Sampling of marine lifeRecorded data of ocean floorAttention to scientific methodHis voyages were the first to include a full-time naturalist.

Ben Franklin

American contributionMapped the Gulf Stream Current (1769) US Congress formed Coast and Geodetic

Survey in 1807

Charles DarwinOne of the early professional

naturalists that made significant contributions to marine biology

most famous for his later works on theories of evolution, was commissioned early in life as a naturalist on the H.M.S. Beagle expeditions (1831-1836).

Darwin collected and studied numerous marine organisms during this famous voyage, which eventually lead to his famous subsidence theory of coral reef formation (for atolls), and a classification of barnacles that is still useful today.

Challenger Expedition The first expedition that was purely

for marine science. Mostly funded by the British, it took

3.5 years (1872 - 1876) to investigate deep-sea regions of all the major ocean basins.

The ship itself was converted for this scientific purpose from a wartime ship with sails and a steam winch.

It was the first government funded, non-military ocean expedition.

Results from this expedition included: 715 new genera 4,717 new species the deepest depth of the oceans

found to be in the Mariana Trench (still the deepest)

50 volumes of information published in the British Museum and the word 'oceanography' used for the first time.

20th Century Expeditions

Scientists reached both the north and south poles

Atlantis- research vessel that confirmed the presence of the Mid-Atlantic Ridge

Germany’s ship- Meteor which used optical and electronic equipment for investigation

Glomar ChallengerTriesteAlvin

The Glomar Challenger Expedition

In 1968, proved the theory of plate tectonics by developing the technology for deep-sea drilling.

The samples from this United States expedition focused on the ocean bottom and provided specimens and data to substantiate the theory of plate tectonics and continental drift.

The Glomar Challenger ship was built specifically for this purpose with a specialized drilling rig in the middle (with 10,000 meters of pipe), engines to position the ship sideways and rotate it, and new satellite navigation equipment and computers.

Submersibles were built like small submarines to take marine scientists to even deeper depths and keep the divers at one atmosphere pressure to avoid the physiological complications associated with scuba, helmets and bells.

The first models could hold several people (usually a submersible pilot and one or two passengers), had small ports allowed limited visibility but allowed marine scientists to actually see and photograph the deeper portions of the ocean.

Submersibles like the Alvin, run by WHOI still operate for deep-sea exploration today.

TriesteThe deepest point of water is the Challenger Deep

located in the Mariana Trench in the Pacific Ocean. In 1960, sponsored by the US Navy,  Jacques

Piccard and Lieutenant Don Walsh manned Bathyscaphe Trieste and descended to the bottom.

The world's longest dive took almost 6 hours and reached a measured depth of  10,916 meters or 35,813 feet.

Dr. Ballard & Alvin

14,764 feet

Made over 150 dives

Titanic

Johnson Sealink

2 submersibles3,000 feetPanoramic viewsManipulator armsSuction devicesPlankton samplersVideo camera

Today’s TechnologyTechnology has changed marine science

over the years. Sonar (Sound Navigation Ranging)

originally for military use.This allowed humans to 'see' the bottom

and other solid objects underwater as sound was transmitted from a vessel with its reflection received and translated into a profile of the ocean bottom (or midwater object).

used by marine scientists to profile the bottom of the ocean (as a fathometer) and outline organisms in the water column.

ROV’s

ROV's (remotely operated vehicles) are now used with and without submersibles to view deep areas of the ocean without the dangers of sending humans down to these depths.

-The ROVs carry all types of cameras and sampling equipment. These have become the latest technology for viewing the ocean. The images from the ROV cameras are transmitted to the vessel overhead and the ROV operator (on the vessel) can maneuver the sampling equipment and cameras to the best positions.

-Dr. Ballard used ROVs to explore the inside of the Titanic.

AUV

Autonomous Underwater Vehicle-robot which travels underwater without requiring input from an operator.

Remote sensing using transmitters and satellites now allows information to be gathered from almost any place.

Transmitters placed on seals, sea lions, and whales send information when the organism surfaces as to the depths of their dives, the temperature of the water, and other things.

This information is bounced from the satellite and picked up almost instantaneously so that the location of the organism and its information is known.

The same thing occurs from buoys placed in the ocean where periodic measurements of temperature, wind, currents and such is transmitted.

Satellites can also be programmed to send almost instant monitoring of the oceanographic conditions all over the world including sea level and color.

LORAN C

Long Range NavigationRadio signal transmittersImproved accuracy24 hour navigationMade shipping saferOnly work with transmitters

GPS

Global Positioning SystemUS military1990sSignals from satellitesWorks and land and seaMore accurate

Aquarius Reef Base

NOAAOriginally in California commisioned in

1986Started research in the Florida Keys in 1992

(Key Largo at Conch Reef)4 scientists and 2 technicians for 10 day

staysAquanats- saturated diving for up to 9 hours

Scuba Diving

Self-Contained Underwater Breathing Apparatus

Jacques Cousteau introduced first practical scuba in 1943

Advantages to scuba