“thermocline”的概念、定义、翻译、参考文献-科学参考

thermocline

Biology

A steep temperature gradient that exists between the relatively warm surface layer and the much colder deep layer of a body of water such as a lake or ocean. In a lake the thermocline occurs in the middle zone (the metalimnion) and gives rise to thermally induced vertical stratification of the water. The metalimnion lies between the relatively warm epilimnion above and the cold hypolimnion below. The thermocline may be short-lived, especially in shallow lakes where wind action can mix the water from different levels. However, it can exist for most of the summer period in temperate lakes and sometimes nearly all year in tropical lakes. A thermocline can speed up the process of eutrophication by preventing the diffusion of oxygen from the epilimnion to the hypolimnion (see eutrophic). The depth and temperature range of oceanic thermoclines vary with season and latitude, typically being deepest and strongest during the summer months and in tropical latitudes.

Geology and Earth Sciences

Generally, a gradient of temperature change, but applied more particularly to the zone of rapid temperature change between the warm surface waters and cooler waters at depth. In the oceans, this zone of rapid temperature change starts at 10–500 m below the surface and can extend down to more than 1500 m. In polar regions the thermocline is generally absent since the ocean surface is covered with ice in winter and solar radiation is small in summer. In thermally stratified lakes in summer the thermocline separates the warm surface waters (epilimnion) from the cooler deep waters (hypolimnion).

Geography

Also known as the metaliminion, the thermocline is the depth at which the temperature gradient of a large body of fluid water changes rapidly with depth. In an ocean, it is the transition layer between the mixed layer at the surface, which is of almost uniform temperature, and the deep water layer below. Within the lower atmosphere, a thermocline occurs at the boundary between the troposphere and the stratosphere.
Oceanic thermocline

单词	thermocline
释义	thermocline Biology A steep temperature gradient that exists between the relatively warm surface layer and the much colder deep layer of a body of water such as a lake or ocean. In a lake the thermocline occurs in the middle zone (the metalimnion) and gives rise to thermally induced vertical stratification of the water. The metalimnion lies between the relatively warm epilimnion above and the cold hypolimnion below. The thermocline may be short-lived, especially in shallow lakes where wind action can mix the water from different levels. However, it can exist for most of the summer period in temperate lakes and sometimes nearly all year in tropical lakes. A thermocline can speed up the process of eutrophication by preventing the diffusion of oxygen from the epilimnion to the hypolimnion (see eutrophic). The depth and temperature range of oceanic thermoclines vary with season and latitude, typically being deepest and strongest during the summer months and in tropical latitudes. Geology and Earth Sciences Generally, a gradient of temperature change, but applied more particularly to the zone of rapid temperature change between the warm surface waters and cooler waters at depth. In the oceans, this zone of rapid temperature change starts at 10–500 m below the surface and can extend down to more than 1500 m. In polar regions the thermocline is generally absent since the ocean surface is covered with ice in winter and solar radiation is small in summer. In thermally stratified lakes in summer the thermocline separates the warm surface waters (epilimnion) from the cooler deep waters (hypolimnion). Geography Also known as the metaliminion, the thermocline is the depth at which the temperature gradient of a large body of fluid water changes rapidly with depth. In an ocean, it is the transition layer between the mixed layer at the surface, which is of almost uniform temperature, and the deep water layer below. Within the lower atmosphere, a thermocline occurs at the boundary between the troposphere and the stratosphere. Oceanic thermocline
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