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Oceanography: the ocean floor, ocean water and its movements
Oceanography: the ocean floor, ocean water and its movements for UPSC Prelims and Mains, taught in 3 parts. Each part has tables, exam traps, a recap and practice questions, and every paragraph is explained in Marathi.
Quick recap: Quick recap: oceanography on one page
Parts of this chapter
The ocean floor, temperature and salinity
How water is spread over the Earth and the five oceans; the relief of the ocean floor: continental shelf, slope and rise, abyssal plains, trenches, mid-ocean ridges, seamounts and guyots; the temperature of ocean water, its controls and its layers, including the thermocline; and salinity, what raises and lowers it, and how it varies from the subtropics to the poles and from the Red Sea to the Baltic.Waves, tides and ocean currents
How wind waves form and break, and why a tsunami is different; what causes tides, why they come about 50 minutes later each day, spring and neap tides, tidal range, bores and tidal energy in India; the forces behind ocean currents, gyres and the thermohaline circulation; the main warm and cold currents of the Atlantic, Pacific and Indian Oceans; and how currents shape climate, deserts, fog and fisheries.El Niño, the Indian Ocean Dipole, coral reefs and ocean resources
The normal Walker circulation and the Southern Oscillation; how El Niño and La Niña develop and affect rainfall worldwide and the Indian monsoon; the Indian Ocean Dipole and its interplay with El Niño; how coral polyps and their algae build reefs, the three types of reef, India's reef areas and coral bleaching; and the maritime zones of UNCLOS, Article 297, polymetallic nodules, the International Seabed Authority and India's Deep Ocean Mission.Study this in the Upscore app to keep notes, save it for revision, track your practice scores and follow a plan to the exam date. It's free.
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