Title: HISTORY OF OCEANOGRAPHY, Part 2: Development of Modern Oceanography
1HISTORY OF OCEANOGRAPHY,Part 2Development of
Modern Oceanography
2DEVELOPMENT OF MODERN OCEANOGRAPHY
- Shallow areas of high traffic needed depth
studies (sounding refers to determining water
depth) were well-charted for safety and
navigation - Deep oceans were poorly known until late 1800s
- Some soundings by explorers as early as 1500 (de
la Cosa) - James Ross' soundings (early 1800'S)
- Little incentive
- Hard work long, wet, heavy ropes weight
- This changed with the Challenger Expedition of
1872-1876! - Challenger used a steam engine to run a winch
piano wire replaced rope - Eventually, the economic incentive came from need
to lay submarine telegraph cables between N A
Europe
3DEVELOPMENT OF MODERN OCEANOGRAPHY - Challenger
Expedition
- John Murray and Charles Thomson conceived this
first sailing expedition devoted entirely to
oceanographic science - They coined the term 'oceanography'
- The 4-year Challenger voyage was a milestone in
the history of marine science.
4DEVELOPMENT OF MODERN OCEANOGRAPHY - Challenger
Expedition
- 226' x 36' Sailing ship (2,306 ton corvette),
auxiliary steam engine - Several 1 000 m cable covered most of deck
- Travelled 130 000 km- Atlantic, Pacific, Indian,
Antarctic oceans - Enormous biological collections of pelagic
benthic organisms - 5 000 new species discovered by this one
expedition! - Proved that life existed in deep ocean.
- Dredged seafloor for organisms, rocks,
sediments - Collected data on atmosphere, weather, and
physical chemical properties of seawater - Obtained extensive data on bathymetry of the
seafloor - Discovered the Mid-Atlantic Ridge
- the Marianas Trench
5DEVELOPMENT OF MODERN OCEANOGRAPHY
- During next 50 years (late 1800's-early 1900's),
many nations copied Britain with own deep-sea
expeditions - For example, Germany, Russia, Austria, USA,
Norway, Denmark - Motivations included fisheries, commerce, naval
activities, transoceanic communication cables - Non-governmental governmental funding of
research - Some international cooperation developed
- Evolution from descriptive to more quantitative
science - New instruments developed for depth, temperature,
salinity - USA
- Albatross - Pacific Ocean, 1888-1920
- Blake - Gulf of Mexico Atlantic Ocean,
1887-1890, included - Alex. Agassiz became a famous biologist
- Chas. Sigsbee became a famous geologist
6DEVELOPMENT OF MODERN OCEANOGRAPHY
- Norwegian Fram under Nansen studied Arctic,
1893-1898 - Nansen invented a marine water sampling device,
now called a Nansen bottle. - Fram was a specially engineered wooden ship
- 1.2m-thick hull
- 3 years intentionally frozen and drifted in polar
ice - 5-year voyage firmly established Nansen's ideas
that - No Polar continent
- Arctic Ocean was a major ocean basin.
- German Meteor Expedition (1925-1927)
- Very modern studies of South Atlantic Ocean,
including - Sediment studies
- Chemical properties of seawater
- Physical properties of seawater
- Topography of seafloor
- Initiated continuous echo sounder (PDR) where
sound travel time was used to calculate water
depths, so a depth profile established along
ship's route.
7DEVELOPMENT OF MODERN OCEANOGRAPHY
- Later major British expeditions
- Antarctic Ocean and later all ocean deep-sea
studies - Discovery I - 1925-1927
- Discovery II - 1930
- Discovery III - Later 1900's
- Initial incentive was the whale industry
- USA eventually lagged behind world, so
established during the 1920's - WHOI (Woods Hole Oceanographic Institute)
- Scripps Institute of Oceanography at La Jolla,
California (Began as a biological field station
in 1912.)
8DEVELOPMENT OF MODERN OCEANOGRAPHY
- An aerial view of Woods Hole (June 1985) showing
a complex of oceanographic research facilities
including - the National Marine Fisheries Service,
- the Marine Biology Laboratory, and
- the Woods Hole Oceanographic Institute.
9DEVELOPMENT OF MODERN OCEANOGRAPHY
- Aerial view of part of the campus and pier of the
Scripps Oceanographic Institute
10DEVELOPMENT OF MODERN OCEANOGRAPHY
- World War II
- Tremendous increase in interest in oceans by many
nations during after the war - Motivations
- Warfare (ship, submarine, mine fields, amphibious
activities) - Advances in technology
- Greater awareness of natural disasters
- Much learned
- Post-war era
- Many international political changes Cold War
began - Stimulated continuous studies of oceans
- Government funding of research became very
important - Seismic studies of oceanic crust initiated
- Lamont-Doherty Earth Observatory (LDEO)
established in late 1940's at Columbia University
in New York
11DEVELOPMENT OF MODERN OCEANOGRAPHY
- Mohole Project (USA)
- Late 1950's to early 1960's
- Purpose drill core through crust to upper
mantle - Thinner crust in ocean basins
- Had to develop new technology
- Deep-water drilling
- Ship stability
- Terminated because
- Costs were too high
- Recession of late 1950s
- Led to JOIDES
- Joint Oceanographic Institutions for Deep Earth
Sampling - Cooperative efforts of scientists of different
U.S. institutions - Reduce costs of oceanographic research
- Not waste new technology developed by Mohole
Project - Still do some limited deep-sea upper crustal
drilling sampling
12DEVELOPMENT OF MODERN OCEANOGRAPHY
- Deep Sea Drilling Program (DSDP)
- Initiated by JOIDES in 1964
- Commissioned the Glomar Challenger 1968
- Seabed cores totalled 96 km end-to-end
- Sampled bottom sediments, rocks, etc.
- Conducted other concurrent studies
- Determined Earth's recent long-term climate
changes - Confirmed theory of seafloor spreading major
contribution! - Ocean Margin Drilling Program (OMDP)
- 10-year project during the 1980's
- Less costly than DSDP
- Focussed on N A continental margins (application
oriented) - Commissioned a new, more modern ship, the Glomar
Explorer
400' long
13DEVELOPMENT OF MODERN OCEANOGRAPHY
- 1960's 1970's
- On-board computers revolutionized research at sea
- Dangers of marine pollution became widely
recognized - Need for broad marine policies and management
recognized - Use of satellites for navigation remote sensing
of oceans - International cooperation programs increased
from late 1950's - Because of the
- High costs of marine research
- Recession during late 1950's
- International Geophysical Year (IGY)
- 1957-8
- Multi-national efforts
- Included oceanographic research
- International Decade of Ocean Exploration (IDOE)
- 1970's
- Geochemical, biological, water circulation,
environmental studies - Seabed mineral assessment
- Led to GEOSECS
14DEVELOPMENT OF MODERN OCEANOGRAPHY
- Geochemical Ocean Section Study (GEOSECS)
- Chemical properties of seawater
- Mid-Ocean Dynamics Experiment (MODE)
- Studied water movements
- Seabed Assessment Program
- Studied mineral petroleum occurrences in the
oceans - Coastal Upwelling Project
- High biological productivity in 1 of ocean's
area - International Geodynamics Project
- 1970's
- Studied plate tectonics
- led to FAMOUS
- FAMOUS
- 1970's
- France USA
- Studied Mid-Atlantic Ridge with manned
submersibles - Much was see firsthand and much learned about
mid-ocean ridge rift valleys
15DEVELOPMENT OF MODERN OCEANOGRAPHY
- Ocean Drilling Program (ODP)
- 1980's outgrowth of OMDP DSDP
- Need to share the growing cost of ocean research
- Annual membership fee of 3 million
- USA plus other countries Great Britain, Japan,
West Germany, France, USSR (later dropped out),
Canada (1983), consortia of smaller nations
sharing annual fee - Canada later dropped to a 3-nation consortia
- New, bigger, better drilling ship built in Canada
(JOIDES Resolution) that can operate in worse
weather, drill where hydrocarbons may be present,
and in Arctic ice conditions - After about 18 years of high-seas research
expeditions, ODP is to end with Leg 210.
16Future Deep-Sea Drilling?
- Yes, the Integrated Ocean Drilling Program
(IODP) will replace ODP. - The Resolution may be still used for awhile, but
a new, bigger, and better ship is planned. - Proposals include drilling for petroleum in
deep-water areas. - 22 nations will contibute 406 million to support
the first 5 years of the program - Research will include investigation of gas
hydrates, climate dynamics (including the
Arctic), continental margins, petroleum
resources, the subsurface biosphere, earthquake
phenomena, mineral deposits associated with the
formation of oceanic lithosphere at mid-ocean
ridges - This is timely for Canada with its young offshore
oil and gas program in Atlantic Canada. - Canada needs about 31 million to participate
during the first 5 years.
17Future?
- More international cooperation cost sharing of
basic research, e. g., IODP - More industry involvement in basic oceanographic
research - Greater use of manned unmanned submersibles
- More applied research uses for
remote-controlled vehicles and cameras - safer - Greater use of satellites for navigation, remote
sensing, weather prediction, basic research, etc. - Greater emphasis on applied research energy,
climate, coastal zones, biological productivity,
environmental problems, mineral petroleum
exploration exploitation, international laws of
the sea, marine engineering
18END OF FILE