TERMIUM Plus®

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

DOWNWELLING [4 records]

Record 1 2011-04-01

English

Subject field(s)
  • Climatology
  • Hydrology and Hydrography
DEF

The downward movement of surface water, generally caused by converging currents or by a water mass that becomes denser than the surrounding water.

OBS

Used in opposition with upwelling.

French

Domaine(s)
  • Climatologie
  • Hydrologie et hydrographie
DEF

Mouvement de descente des eaux de surface. La plongée d'eau est provoquée par la formation en surface d'eaux plus denses par suite de mouvements de convergence ou par suite de conditions hydrométéorologiques particulières : baisse de la température, accroissement de salinité par évaporation.

OBS

Ces termes s'emploient par opposition à «remontée d'eau».

Spanish

Campo(s) temático(s)
  • Climatología
  • Hidrología e hidrografía
Save record 1

Record 2 2007-01-31

English

Subject field(s)
  • Earth-based Stations
  • Remote Sensing
CONT

In order to calibrate the sensor, it is essential to know the atmospheric conditions at the time of data acquisition over the known reference site so that data normalization could be carried out by computing the atmospheric transmittance, path radiance and total downwelling irradiance incident on the calibration site. Further, it is also necessary to know the background reflectance of the area in which the calibration site is located.

OBS

[There will be at least one calibration in Canada and one in France] to allow external calibration measurements from the spacecraft.

OBS

calibration site: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Stations terriennes
  • Télédétection
CONT

Le calibrage du senseur exige que soient connues, au moment de l'acquisition des données, les conditions atmosphériques du site de référence, de manière que l'ordinateur puisse générer les données standards qui tiennent compte de la transmittance, de la luminance énergétique de la trajectoire atmosphérique ainsi que de l'éclairement énergétique incident par rapport au site d'étalonnage.

CONT

Il y aura au moins un site d'étalonnage au Canada et un en France pour permettre la tenue de mesures d'étalonnage externe à partir du satellite.

OBS

site d'étalonnage : terme uniformisé par le Comité d'uniformisation de la terminologie spatiale (CUTS) et par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Estaciones terrenas
  • Teledetección
Save record 2

Record 3 2005-05-27

English

Subject field(s)
  • Oceanography
  • Hydrology and Hydrography
  • Meteorology
DEF

Horizontal water motion of the ocean due to the stress exerted on its surface by the wind.

CONT

The main principles of wind-driven ocean circulation are as follows. 1. Wind stress causes transport of water in a thin Ekman surface layer. 2. If there is a curl to the wind stress, the Ekman layer transport will converge or diverge, causing downwelling or upwelling. 3. The downwelling or upwelling motions cause fluid columns to squash or stretch vertically, and this causes slow southward or northward flow due to conservation of potential vorticity. 4. The southward or northward flow is determined by the Sverdrup relationship, which links the N-S transport of water with the curl of the wind stress. In order to conserve mass, the water returns to its original position via a relatively thin boundary layer adjacent to the western edge of the basin.

Key term(s)
  • wind driven oceanic circulation

French

Domaine(s)
  • Océanographie
  • Hydrologie et hydrographie
  • Météorologie
DEF

Mouvement horizontal de l'eau océanique dû à la contrainte exercée par le vent sur sa surface.

Spanish

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

Movimiento horizontal del agua oceánica debido a la tensión ejercida por el viento sobre su superficie.

Save record 3

Record 4 1999-07-19

English

Subject field(s)
  • Law of the Sea

French

Domaine(s)
  • Droit de la mer

Spanish

Save record 4

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: