Sea-level changes refer to fluctuations in the mean sea level caused by eustatic factors (changes in ocean water volume due to ice melt and thermal...
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Theories of Origin of Coral Reefs | UPSC
Various theories have been proposed to explain how coral reefs formed, from Darwin's Subsidence Theory (1842) to Daly's Glacial Control Theory (1915). This guide covers...
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El-Nino, La-Nina, ENSO, El Nino Modoki | UPSC Oceanography
El Nino and La Nina are opposite phases of the El Nino-Southern Oscillation (ENSO) cycle — a recurring climatic pattern involving temperature changes in the...
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Ocean Resources: Biotic and Abiotic | UPSC Oceanography
Ocean resources are classified into biotic (plankton, nekton, benthos) and abiotic (minerals, energy). The ocean provides food, fuel, minerals, renewable energy, and supports global trade....
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Vertical & Horizontal Temperature Distribution of Oceans | UPSC
Ocean temperature varies from latitude to latitude and from the surface to the bottom. The ocean is divided into three vertical zones — the surface...
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Salinity of Ocean Water | UPSC
Salinity of ocean water refers to the total dissolved salt content in seawater, expressed in parts per thousand (ppt). The average ocean salinity is 35.2...
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Ocean Currents | UPSC
Ocean currents are continuous movements of ocean water in a specific direction, driven by planetary winds, temperature, salinity, gravity, and the Coriolis force. This guide...
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Tides: Spring & Neap Tide, Tidal Bulge, Tidal Bore | UPSC
Tides are the periodic rise and fall of sea level produced by the gravitational interaction of earth, sun, and moon. This guide covers spring tides,...
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Ocean Waves & Movements of Ocean Water | UPSC
Ocean water is never still — it moves horizontally as waves and currents, and vertically as tides and upwelling. This guide explains everything about ocean...
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Ocean Salinity Variations: 5 Key Factors & Global Patterns
Ocean salinity variations result from five primary physical processes that work simultaneously across global marine systems. Evaporation increases salinity by removing pure water while leaving...
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Salinity of Ocean Water
As an oceanographer who has spent decades sampling the vast waters of our planet, from the frigid poles to the […]
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How does latitude affect solar radiation?
How Latitude Affects the Distribution of Solar Radiation If Earth were a flat surface oriented perpendicularly to the Sun, solar […]
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