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source region [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-08-01

English

Subject field(s)
  • Atmospheric Physics
DEF

Extensive region of the Earth's surface characterized by essentially uniform surface conditions and so placed with respect to the general atmospheric circulation that an air mass may remain in contact with it long enough to acquire its own characteristic properties.

CONT

... air masses are classified according to the characteristics of their source region or area of formation. A source region can have one of four temperature attributes: equatorial, tropical, polar or arctic. Air masses are also classified as being either continental or maritime in terms of moisture characteristics. Combining these two categories, several possibilities are commonly found associated with North America: maritime polar (mP), continental polar (cP), maritime tropical (mT), continental tropical (cT), and continental arctic (A).

Key term(s)
  • air-mass source region
  • air-mass source area
  • airmass source area
  • air-mass source
  • air mass source

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Région étendue de la surface terrestre caractérisée par des conditions de surface essentiellement uniformes et située de telle façon, par rapport à la circulation atmosphérique générale, qu'une masse d'air puisse rester en contact avec elle suffisamment longtemps pour acquérir ses propriétés caractéristiques.

Spanish

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

Región extensa de la superficie de la Tierra, con condiciones superficiales esencialmente homogéneas, situada de tal manera con respecto a la circulación atmosférica general, que una masa de aire puede permanecer sobre ella un intervalo de tiempo lo suficientemente largo como para adquirir sus propiedades características.

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Record 2 2002-06-25

English

Subject field(s)
  • Air Pollution
CONT

Eastern North America can be divided up in a variety of ways for purposes of source-receptor modeling as described in Chapter 4. In the United States many modelers have used a basic 80 km grid with the cells aggregated into 63 geographical areas ... Of particular interest in the present context is the impact of individual or combined source areas on the ten areas designated as sensitive receptor areas.

French

Domaine(s)
  • Pollution de l'air
CONT

Les dépôts sont exprimés en kilogramme de soufre par hectare par année [kg S ha-1an-1. On a ajouté au calcul, le pourcentage du dépôt total affectant une région collectrice donnée et provenant d'une région émettrice donnée.

Spanish

Campo(s) temático(s)
  • Contaminación del aire
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