: Paléoclimatologie: thermocline

scientific discipline > hydrography > thermocline

thermocline

The thermocline is the zone of rapid thermal transition between the surface waters of the ocean (generally warmer and oxygenated) and the deep waters (generally colder, anoxic and sometimes saltier). Depending largely on season, latitude, and turbulent mixing by wind, thermoclines may be a semi-permanent feature of the body of water in which they occur, or they may form temporarily in response to phenomena such as the radiative heating/cooling of surface water during the day/night. Factors that affect the depth and thickness of a thermocline include seasonal weather variations, latitude, and local environmental conditions, such as tides and currents. The zone above the thermocline is called the epilimnion, and the zone below is called the hypolimnion. In a eutrophic environment, the hypolimnion can be depleted in oxygen, or even anoxic, with the possible appearance of a dead zone. (Adapted from: https://en.wikipedia.org/wiki/Thermocline and translated from: https://fr.wikipedia.org/wiki/Thermocline)

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