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UPPER LEVEL DIVERGENCE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-12-12

English

Subject field(s)
  • Atmospheric Physics

French

Domaine(s)
  • Physique de l'atmosphère
CONT

La convection dans les cyclones tropicaux s'organise en de longues et étroites bandes pluvieuses orientées dans la même direction que le vent horizontal. Ces bandes qui paraissent former une spirale convergeant vers le centre du cyclone, sont quelquefois appelées «bandes spiralées». Le long de ces bandes, la convergence de bas niveau est maximum, et par conséquent, la divergence des niveaux supérieurs est plus prononcée.

Spanish

Save record 1

Record 2 2003-07-16

English

Subject field(s)
  • Meteorology
DEF

Progressive drawing apart of the streamlines in the direction of flow.

OBS

Difluence in an upper level wind field is considered a favorable condition for severe thunderstorm development(if other parameters are also favorable). But difluence is not the same as divergence. In a difluent flow, winds normally decelerate as they move through the region of difluence, resulting in speed convergence which offsets the apparent diverging effect of the difluent flow.

French

Domaine(s)
  • Météorologie
DEF

Épanouissement progressif, dans le sens de l'écoulement, des lignes de courant.

Spanish

Campo(s) temático(s)
  • Meteorología
DEF

Separación progresiva de las líneas de corriente en la dirección del flujo.

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Record 3 2002-05-16

English

Subject field(s)
  • Atmospheric Physics
DEF

Level in the atmosphere at which the horizontal divergence is near zero.

CONT

An operational forecaster locates regions of upper level divergence by locating the divergence sector of a vorticity gradient near the LND(Level of Non-divergence). The LND is closest to the mandatory level of 500 mb, thus upper level vorticity is usually plotted on this prog. The LND is the general level that separates the low levels of the troposphere from the upper levels. Vorticity advection is best assessed near the LND.

OBS

level of non-divergence... It is generally situated at about 600 hPa, the horizontal divergence having opposite signs in the lower and upper troposphere.

Key term(s)
  • non-divergence level
  • non divergence level

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Niveau de l'atmosphère où la divergence horizontale avoisine zéro.

OBS

Il se situe habituellement vers 600 hPa, la divergence horizontale ayant des signes opposés dans la basse et la haute troposphère.

Spanish

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

Nivel de la atmósfera en que la divergencia horizontal está próxima de cero.

OBS

Un nivel de estas características existe con frecuencia en los 600 hPa; la divergencia horizontal tiene signos opuestos en la troposfera alta y baja.

Save record 3

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