Thermohaline Circulation and Ocean Salinity Made Simple YouTube Lecture Handouts Geography
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Thermohaline Circulation & Ocean Salinity Made Simple - In 20 Minutes
Thermohaline Circulation
- Thermohaline circulation begins in the Earth՚s Polar Regions.
- It is a part of the large-scale ocean circulation.
- Driven by global density gradients created by surface heat and freshwater fluxes.
Where Salt Comes From?
Salinity
- Concentration of salt in seawater or salinity is about 35 parts per thousand.
Psu
- Practical Salinity Scale defines salinity as conductivity ratio of a sample to that of a solution of 32.4356 g of KCl at 15°C in a 1 kg solution.
- Sample of seawater at 15°C with conductivity equal to this KCl solution has a salinity of exactly 35 practical salinity units (Psu) .
Factors Affecting Salinity
- Evaporation
- Precipitation
- River water and Melt water
- Atmospheric Pressure
- Wind Direction
- Movement of Seawater
- Location and Characteristics of Sea
Role of Sea Life
- Lobsters concentrate copper and cobalt
- Snails secrete lead
- Sea cucumber extracts vanadium
- Sponges and seaweeds remove iodine
✍ Manishika