Portal:Oceans
The Oceans Portal
A portal dedicated to oceans, seas, oceanography and related topics
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Introduction

The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the world ocean is conventionally divided. Separate names are used to identify five different areas of the ocean: Pacific (the largest), Atlantic, Indian, Antarctic/Southern, and Arctic (the smallest). Seawater covers approximately 361,000,000 km2 (139,000,000 sq mi) of the planet. The ocean is the principal component of Earth's hydrosphere, and therefore integral to life on Earth. Acting as a huge heat reservoir, the ocean influences climate and weather patterns, the carbon cycle, and the water cycle. (Full article...)

Sea refers to a large body of salty water, specifically of seawater. There are particular seas and the sea. The body of saline water that is generally referred to as the sea, is a body of salt water that extends as ocean water and ocean (or world ocean) over approximately 71% of the Earth's surface. The particular seas are either marginal seas, second-order sections of the oceanic sea (e.g. the Mediterranean Sea), or certain large, entirely landlocked, saltwater lakes (e.g. the Caspian Sea). (Full article...)
Oceanography (from Ancient Greek ὠκεανός (ōkeanós) 'ocean', and γραφή (graphḗ) 'writing'), also known as oceanology and ocean science, is the scientific study of the oceans. It is an Earth science, which covers a wide range of topics, including ecosystem dynamics; ocean currents, waves, and geophysical fluid dynamics; plate tectonics and the geology of the sea floor; and fluxes of various chemical substances and physical properties within the ocean and across its boundaries. These diverse topics reflect multiple disciplines that oceanographers utilize to glean further knowledge of the world ocean, including astronomy, biology, chemistry, climatology, geography, geology, hydrology, meteorology and physics. Paleoceanography studies the history of the oceans in the geologic past. An oceanographer is a person who studies many matters concerned with oceans, including marine geology, physics, chemistry and biology. (Full article...)
Selected article -

The Central American Seaway (also known as the Panamanic Seaway, Inter-American Seaway and Proto-Caribbean Seaway) was a body of water that once separated North America from South America. It formed during the Jurassic (200–154 Ma) during the breakup of the supercontinent Pangaea, and closed when the Isthmus of Panama was formed by volcanic activity in the late Pliocene (2.76–2.54 Ma).
The closure of the Central American Seaway had tremendous effects on oceanic circulation and the biogeography of the adjacent seas, isolating many species and triggering speciation and diversification of tropical and sub-tropical marine fauna. The inflow of nutrient-rich water of deep Pacific origin into the Caribbean was blocked and so local species had to adapt to an environment of lower productivity. It had an even larger impact on terrestrial life. The seaway had isolated South America for much of the Cenozoic, which allowed the evolution of a wholly-unique diverse mammalian fauna there. When it closed, a faunal exchange with North America ensued and led to the extinction of many of the native South American forms. (Full article...)Interesting facts -

- Captain James Young's capture of a Spanish frigate in 1799 (illustrated) brought each of his seamen the equivalent of ten years' pay in prize money.
- Observations and samplings from Jasper Seamount show that it is very similar to Hawaiian volcanoes.
- The snail species Oxygyrus keraudrenii shows an evolutionary reduction of the gastropod shell for living in open sea.
Selected list articles and Marine habitat topics
| Marine habitats |
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- List of oceans
- List of ancient oceans
- List of seas
- List of circumnavigations
- List of cruise lines
- List of largest lakes and seas in the Solar System
- List of marine biologists
- List of marine ecoregions
- List of maritime explorers
- List of naval battles
- List of ocean liners
- List of oceanographic institutions and programs
- List of oldest surviving ships
- List of rogue waves
- List of seafood dishes
- List of submarine topographical features
Tasks
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Related portals
In the news
- 7 February 2023 – Global spread of H5N1
- Peru's Ministry of Environment reports that the H5N1 influenza A virus has killed 585 sea lions and more than 55,000 birds within its protected areas in recent weeks. (AFP via Hindustan Times)
- 4 February 2023 – High-altitude object events in 2023
- The high-altitude balloon is shot down by a United States Air Force F-22 Raptor over the Atlantic Ocean at 2:39 PM EST. An operation to collect the remnants of the balloon in U.S. territorial waters is currently underway. It is the first time that an aircraft has been shot down in the United States since World War II. (AP) (CNN)
- 29 January 2023 – 2022–23 South-West Indian Ocean cyclone season
- The death toll from Cyclone Cheneso's landfall in Madagascar has increased to 25, with 21 others still missing. (AFP via ABS-CBN News)
- 20 January 2023 –
- A Dominican man who was lost in the Caribbean Sea for 24 days is rescued by the Colombian Navy. (AP)
- 10 January 2023 – Territorial disputes in the South China Sea
- The Supreme Court of the Philippines nullifies the country's Joint Marine Seismic Undertaking agreement with the China National Offshore Oil Corporation and Petrovietnam to conduct joint oil and gas exploration activities within the Philippine exclusive economic zone in the South China Sea since 2005, citing the unconstitutionality of permitting foreign corporations and governments to exploit the country's natural resources. (Reuters via CNN)
WikiProjects
- WikiProject Oceans
- WikiProject Limnology and Oceanography
- WikiProject Marine life
- WikiProject Cetaceans
- WikiProject Fishes
- WikiProject Sharks
- Related WikiProjects
- WikiProject Arthropods
- WikiProject Fisheries and Fishing
- WikiProject Lakes
- WikiProject Rivers
Topics
Categories
Associated Wikimedia
The following Wikimedia Foundation sister projects provide more on this subject:
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Commons
Free media repository -
Wikibooks
Free textbooks and manuals -
Wikidata
Free knowledge base -
Wikinews
Free-content news -
Wikiquote
Collection of quotations -
Wikisource
Free-content library -
Wikiversity
Free learning tools -
Wiktionary
Dictionary and thesaurus
Admiralty law
| Admiralty law |
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| History |
| Features |
| Contract of carriage/Charterparty |
| Parties |
| Judiciary |
| International conventions |
| International organisations |
Need assistance?
Do you have a question about oceans, seas or oceanography that you can't find the answer to? Consider asking it at the Wikipedia reference desk.
External media
- World Ocean Database and World Ocean Atlas Series – from the U.S. National Centers for Environmental Information, National Oceanic and Atmospheric Administration. Includes the World Ocean Atlas.
- European Atlas of the Seas – the European Atlas of the Seas, from the European Commission
- NOAA Research – NOAA research news, Oceanic and Atmospheric Research (OAR)
- Ocean Research – from The World Ocean Observatory
- Ocean Biodiversity Information System – "a global open-access data and information clearing-house on marine biodiversity for science, conservation and sustainable development"
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