Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by...
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Transcript of Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by...
![Page 1: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/1.jpg)
Oceans
![Page 2: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/2.jpg)
Vitally Important to Our Planet
• Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions
• Starting point of the Hydrological Cycle (evaporation, water vapour, clouds, snow, ice)
• Carbon sinks and producers of oxygen (phytoplankton produce 25% of the world’s oxygen)
![Page 3: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/3.jpg)
![Page 4: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/4.jpg)
![Page 5: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/5.jpg)
![Page 6: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/6.jpg)
![Page 7: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/7.jpg)
![Page 8: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/8.jpg)
Ocean Pollution
• Shared dumping ground
• Shoreline areas, which teem with aquatic life are the most polluted areas of our oceans
• Rivers bring agricultural, city and industrial waste
• Tides bring pollutants back to shore
![Page 9: Oceans. Vitally Important to Our Planet Ocean conveyor (current) regulates world temperatures by transporting heat from tropical regions to northern regions.](https://reader035.fdocuments.us/reader035/viewer/2022081520/56649e355503460f94b24d79/html5/thumbnails/9.jpg)
Types of Marine Pollution
• Oil : in transit for our use– Tanker accidents “Exxon Valdez”
• Biggest culprit “US” ; oil from drains, streets. The oily runoff from a city of 5m people can be equivalent to one oil tanker spill
• Bilges; past a problem but more regulation• Technology now ‘fingerprinting oil’• Satellite tracking• Recycling of used oil• Recreational boating• Off shor oil drilling• Illegal dumping by cruise ships
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Can carry 2,600 people and 1200 crewMany now have sewage treatment on board
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Agricultural run-off
• fertilizers, pesticides and herbicides used to increase crop yields
• Chemicals are not bio-degradable• Rainwater washes them into streams• Infiltration carries them through the soil and out,
often super-enrich these streams increasing plant growth until it becomes oxygen starved – eutrophication
• creating dead zones ; often near river mouths
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Sewage
• waste from urban centers– Cost to treat waste– Primary treatment (just removing solids)
• Many urban centers barge waste out to sea and dump it
• Worst Canadian centers, Victoria, Saint John, Halifax, St. John’s
• Storm and sanitary sewers (combines snow this has stopped in many centers)
• Industrial waste and thermal pollution• Chemicals and heavy metals
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Why Should We Be Concerned?
• Oceans like Tropical Rainforests …oxygen, carbon dioxide and the hydrologic cycle
• We might need to become ‘farmers of the seas’