TERMIUM Plus®

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

GRADIENT MAGNITUDE [11 records]

Record 1 2023-02-23

English

Subject field(s)
  • Atmospheric Physics
CONT

A veering wind is a wind that turns clockwise with height. An example of a veering wind would be a southeast wind at the surface and a west wind at 700 millibars. The wind turns in the same direction as a clock from the surface to 700 millibars. A veering wind is associated with warm air advection and dynamic lifting... The magnitude of warm air advection is a function of wind speed and the pre-existing thermal gradient. Weak winds will result in weak advection. Winds often veer ahead of cold fronts(in the warm sector of a mid-latitude cyclone).

French

Domaine(s)
  • Physique de l'atmosphère
OBS

Vent tournant dans le sens des aiguilles d'une montre, par exemple du sud-est au sud-ouest en passant par le sud.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Cambio de la dirección del viento en el sentido de las agujas del reloj en cualquiera de los dos hemisferios.

Save record 1

Record 2 2013-06-20

English

Subject field(s)
  • Remote Sensing
  • Cartography
CONT

The magnitude of the horizontal gradient of each of [the] line segments is plotted as large dots, and these define a bell-shaped curve. The peak of the horizontal gradient curve is located over the contact.

French

Domaine(s)
  • Télédétection
  • Cartographie

Spanish

Save record 2

Record 3 2013-06-20

English

Subject field(s)
  • Remote Sensing
  • Cartography
DEF

... the arctangent of the ratio of the vertical gradient to the magnitude of horizontal gradient of the magnetic field.

French

Domaine(s)
  • Télédétection
  • Cartographie
DEF

Angle du vecteur champ magnétique avec l'horizontale du lieu.

Spanish

Save record 3

Record 4 2006-06-07

English

Subject field(s)
  • Scientific Instruments
  • Optics
  • Scientific Measurements and Analyses
DEF

An instrument that measures very small distances by splitting a light beam into two parts directed over separate paths and then reuniting the beams. The difference in paths lengths is displayed as a light interference pattern, which can be related to the distance moved.

CONT

Space Based Detectors. Ground based interferometers are limited at the low frequency end by the practical difficulties of operating on Earth : the increasing difficulty of vibration isolation at lower frequencies, the effects of the curvature of the Earth for longer baseline detectors, and the expense of longer vacuum systems. There is also the fundamental difficulty of gravity gradient noise... The obvious solution to these specific difficulties is to use an interferometric detector in space. Interferometer arms may be made orders of magnitude longer than is practical on Earth.

French

Domaine(s)
  • Instruments scientifiques
  • Optique
  • Mesures et analyse (Sciences)
CONT

L'interféromètre est un [...] dispositif qui utilise les interférences. C'est un appareil dans lequel un faisceau lumineux est divisé en deux rayons parallèles. Chaque rayon se déplace alors sur une distance fixe avant qu'il soit rejoint par son jumeau au sein d'un faisceau unique. Si les distances parcourues et les indices de réfraction des deux trajets sont les mêmes, les rayons se recombineront de manière constructive et le faisceau original sera recréé. Si les distances sont différentes, ou si l'indice de réfraction de l'un des deux trajets est modifié, les rayons subiront une interférence destructive et le nouveau faisceau affichera une intensité réduite. Les interféromètres sont extrêmement sensibles aux modifications de la distance ou de l'indice de réfraction des deux trajets. Avec ce dispositif, des écarts de distance inférieurs à une longueur d'onde peuvent être mesurés facilement.

PHR

Interféromètre intégré.

Spanish

Campo(s) temático(s)
  • Instrumentos científicos
  • Óptica
  • Medición y análisis (Ciencias)
Save record 4

Record 5 2004-03-19

English

Subject field(s)
  • Atmospheric Physics
DEF

The rate of change of pressure with distance.

OBS

pressure gradient; barometric gradient. Mathematically, [it is] a vector, perpendicular to an isobaric line or surface, directed toward low pressure and with a magnitude equal to the rate of change of the pressure with distance. It is equal to-Vp, p being the pressure, or to-[delta] p/[delta] n, n being the distance along the normal directed towards low pressure.

OBS

pressure gradient : the term is sometimes loosely used to denote simply the magnitude of the gradient of the pressure field.

OBS

pressure gradient: term standardized by ISO and officially approved by the International Civil Aviation Organization (ICAO).

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Taux de variation de la pression avec la distance.

OBS

Mathématiquement, [le gradient de pression est un] vecteur perpendiculaire à l'isobare ou à la surface isobare dirigé vers les basses pressions et dont l'intensité est égale au taux de variation de la pression en fonction de la distance.

OBS

gradient de pression : terme normalisé par l'ISO; uniformisé par l'Organisation de l'aviation civile internationale (OACI).

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Tasa de variación de la presión con la distancia.

OBS

Matemáticamente, vector perpendicular a la isobara o a la superficie isobárica dirigido hacia las bajas presiones y cuya magnitud es igual a la tasa de variación de la presión en función de la distancia.

OBS

gradiente de presión; gradiente barométrico: términos aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

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Record 6 2003-02-24

English

Subject field(s)
  • Space Physics
CONT

Amplitude and phase of 24-and 12-hours oscillations strongly depended on the electric field magnitude. This suggests that electromagnetic force such as ion drag and pressure gradient caused by Joule and particle heating can generate and/or modulate thermospheric tides in the transient region.

French

Domaine(s)
  • Physique spatiale

Spanish

Save record 6

Record 7 2002-06-06

English

Subject field(s)
  • Atmospheric Physics
DEF

Force applied to each particle of a fluid as the result of the non-uniform field of pressure.

OBS

It [the force] acts in the direction and sense of the pressure gradient; for a particle of unit mass its magnitude is(1/p) grad p, p being the fluid density and grad p, the pressure gradient.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Force s'appliquant sur chaque particule d'un fluide par suite de la non-uniformité du champ de pression.

OBS

Elle [la force] s'exerce dans la direction et le sens du gradient de pression; pour une particule de masse unitaire, son intensité est (1/p) grad p, p étant la densité du fluide et grad p, le gradient de pression.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
DEF

Fuerza aplicada a todas las partículas de un fluido, ocasionada por la falta de uniformidad del campo de la presión.

OBS

Actúa en la dirección y en el sentido del gradiente de presión; para una partícula con unidad de masa, su magnitud viene dada por (1/p) grad p, donde p es la densidad del fluido y grad p el gradiente de presión.

Save record 7

Record 8 1994-07-21

English

Subject field(s)
  • Artificial Intelligence
DEF

Operator that yields the magnitude of the two dimensional, first order brightness gradient at each point as a means of edge detection in an image.

French

Domaine(s)
  • Intelligence artificielle

Spanish

Save record 8

Record 9 1994-07-15

English

Subject field(s)
  • Artificial Intelligence
DEF

Operator that yields the magnitude of the brightness gradient as a means of edge detection in an image.

French

Domaine(s)
  • Intelligence artificielle
OBS

Projet de norme ISO sur la visionique.

Spanish

Save record 9

Record 10 1988-05-13

English

Subject field(s)
  • Environmental Studies and Analyses
  • Atmospheric Physics
CONT

K-theory. In this approach, diffusion by turbulent atmospheric motion is of a gradient type treated analogously with molecular diffusion, with the exception that the molecular coefficient of diffusivity is replaced by its turbulent counterpart. The turbulent coefficient is of several orders of magnitude greater than the molecular one.

French

Domaine(s)
  • Études et analyses environnementales
  • Physique de l'atmosphère

Spanish

Save record 10

Record 11 1986-06-18

English

Subject field(s)
  • Calorimetry
  • Geophysics
CONT

... [A figure] shows the depths to which we would have to penetrate in order to reach various temperatures in zones of various mean temperature gradients. Of course in practice the temperature/depth relationship would never be a simple linear one... owing to changes of thermal conductivity with depth, but in terms of average thermal gradient the figure serves to show the order or magnitude of the required penetration depths to reach various required temperatures in non-thermal and semi-thermal areas.

French

Domaine(s)
  • Calorimétrie
  • Géophysique

Spanish

Save record 11

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