TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

HYPOLIMNION [8 records]

Record 1 2022-01-07

English

Subject field(s)
  • Hydrology and Hydrography
  • Environmental Studies and Analyses
CONT

Large amounts of measurements in space and time are always needed to give reliable estimates of mixing in a water body. One particular interest of this work concerns a dense survey of temperature microstructure at different times of year. This enables testing of the characteristics of the turbulence weather in the hypolimnion of the lake.

Key term(s)
  • temperature micro-structure

French

Domaine(s)
  • Hydrologie et hydrographie
  • Études et analyses environnementales

Spanish

Save record 1

Record 2 2020-05-26

English

Subject field(s)
  • Hydrology and Hydrography
DEF

The layer in a thermally stratified body of water in which the temperature gradient is at a maximum.

CONT

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 thermally stratified lakes in summer the thermocline separates the warm surface waters(epilimnion) from the cooler deep waters(hypolimnion).

OBS

thermocline: term and definition standardized by ISO.

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Partie d'une masse d'eau stratifiée pour laquelle le gradient de température atteint un maximum.

OBS

thermocline : terme et définition normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
DEF

Capa de una masa de agua térmicamente estratificada en la que el gradiente de temperatura es máximo.

Save record 2

Record 3 2020-05-01

English

Subject field(s)
  • Hydrology and Hydrography
DEF

The water below the thermocline in a stratified body of water.

CONT

Water's unique temperature-density relationship results in the formation of distinct layers within nonflowing bodies of water... During the summer, a surface layer(epilimnion) is heated by solar radiation and, because of its lower density, floats upon the bottom layer, or hypolimnion. This phenomenon is called thermal stratification.

OBS

hypolimnion : term and definition standardized by ISO.

OBS

Plural: hypolimnia.

Key term(s)
  • hypolimnia

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Couche d'eau qui, dans une masse d'eau stratifiée, est située sous [la] thermocline.

OBS

hypolimnion : terme et définition normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
DEF

Capa de agua situada en la zona más profunda de un lago, caracterizada por una temperatura generalmente uniforme y más fría que el resto del lago, por lo general es pobre en oxígeno.

Save record 3

Record 4 2020-05-01

English

Subject field(s)
  • Hydrology and Hydrography
CONT

The transition layer between the upper water body(epilimnion) and the lower water body(hypolimnion) in a stratified lake is referred to as the "metalimnion, "whereas if a single depth is to be reported to represent the division between layers, the section of highest temperature gradient with depth within the metalimnion is often employed, and may be referred to as the "thermocline. "

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Couche thermique de transition dans l'eau stratifiée d'un lac située entre l'épilimnion et l'hypolimnion comprenant la thermocline [...]

Spanish

Save record 4

Record 5 2001-01-09

English

Subject field(s)
  • Environmental Studies and Analyses
CONT

... it was necessary to examine the magnitude of the increase in phosphorus loading to the lake. In this regard, several important factors such as phosphorus loading from other sources, flushing rate of the lake, capacity of the shoreline soils to bind phosphorus, and so on, required investigation. It was recognized that the critical link between phosphorus levels and effects on the trout population was the oxygen level(or more correctly, the oxygen deficit) in the hypolimnion. This oxygen level could be translated into carrying capacity for trout which determined the maximum trout biomass that could be supported by the lake.

French

Domaine(s)
  • Études et analyses environnementales

Spanish

Save record 5

Record 6 1988-01-20

English

Subject field(s)
  • Environmental Studies and Analyses
  • Hydrology and Hydrography
CONT

..., it was necessary to examine the magnitude of the increase in phosphorus loading to the lake. In this regard, several important factors such as phosphorus loading from other sources, flushing rate of the lake, capacity of the shoreline soils to bind phosphorus, and so on, required investigation. It was recognized that the critical link between phosphorus levels and effects on the trout population was the oxygen level(or more correctly, the oxygen deficit) in the hypolimnion. This oxygen level could be translated into carrying capacity for trout which determined the maximum trout biomass that could be supported by the lake.

French

Domaine(s)
  • Études et analyses environnementales
  • Hydrologie et hydrographie

Spanish

Save record 6

Record 7 1978-08-08

English

Subject field(s)
  • Hydrology and Hydrography
DEF

Pertaining to the uniform distribution of dissolved oxygen in the hypolimnion of a lake, dependent only "on conditions at circulation and on subsequent physical events".

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Se dit d'une distribution homogène de l'oxygène dans une masse d'eau.

CONT

En profondeur seuls les phénomènes de respiration et de décomposition bactérienne agiront dans la nuit relative ou permanente et il y aura toujours absorption. Le phénomène physique de circulation lié à une turbulence généralisée du milieu tendra à homogénéiser la distribution de l'oxygène qui sera dite orthograde.

Spanish

Save record 7

Record 8 1978-07-24

English

Subject field(s)
  • Hydrology and Hydrography
DEF

Pertaining to the decreasing concentration of oxygen or other chemicals in the hypolimnion of a lake.

CONT

As the temperature curve falls to some limiting value near 4 ° C., so the oxygen curve in extreme cases falls off to zero. Such an extreme distribution is termed by Aberg and Rodhe clinograde.

French

Domaine(s)
  • Hydrologie et hydrographie
DEF

Se dit d'une répartition inégale de l'oxygène dans les couches trophogène et tropholytique d'une masse d'eau.

CONT

Si, au contraire, la biomasse présente, grâce à des conditions particulièrement favorables, se développe beaucoup, elle provoque une augmentation spectaculaire du taux d'oxygène dissous dans la zone trophogène le jour et simultanément une diminution, voire une disparition de ce gaz dans la zone tropholytique bien que la distribution de la température tende à contrarier cette répartition. La distribution de l'oxygène sera clinograde.

Spanish

Save record 8

Copyright notice for the TERMIUM Plus® data bank

© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau

Features

Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: