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BOUNDARY SURFACE [2 records]

Record 1 2015-03-11

English

Subject field(s)
  • Atmospheric Physics
DEF

Thin layer of air adjacent to the Earth's surface and whose depth varies about 10 and 100 metres.

CONT

... the "Atmospheric Surface Layer" (ASL), the layer of the atmosphere within which all our activities (except flying) take place. The ASL is the inner layer of the PBL within which vertical mixing is limited by proximity to the ground - a layer within which the eddy size is small because the solid barrier prohibits any organized downward (or upward) motion. Vast amounts of heat and vapour travel through this surface layer to the outer PBL and ultimately the whole atmosphere.

OBS

The term "atmospheric boundary layer" may sometimes means "planetary boundary layer". To avoid confusion and misunderstanding within one another, preferably do not use these terms.

OBS

Reproduced from "Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of Unesco", with the authorization of Unesco.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Mince couche d'air adjacente à la surface du globe dont l'épaisseur est d'environ 10 à 100 mètres.

OBS

Le terme «couche limite atmosphérique» peut parfois s'appliquer aussi à la notion de «couche limite planétaire» (planetary boundary layer, en anglais).

OBS

Reproduit de «Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of Unesco», avec l'autorisation de l'Unesco.

Spanish

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

Capa fina de aire adyacente a la superficie terrestre cuyo espesor varía entre 10 y 100 m.

OBS

Reproducido del "Titles, Names and Acronyms related to the activities of the International Oceanographic Commission of Unesco", con la autorización de Unesco.

Save record 1

Record 2 2005-04-20

English

Subject field(s)
  • Vulcanology and Seismology
  • Geophysics
DEF

A surface at which seismic-wave velocities abruptly change; a boundary between seismic layers of the Earth.

French

Domaine(s)
  • Volcanologie et sismologie
  • Géophysique
DEF

[...] surface marquée par des modifications brutales des propriétés physiques à l'intérieur du globe terrestre.

CONT

[...] l'étude de la transmission des tremblements de terre, ou séismologie, permet d'affirmer qu'il existe trois zones concentriques séparées par deux surfaces de discontinuité principales. La première [...] se situe à une profondeur de 5 à 35 km et sépare l'écorce proprement dite du manteau [...] La seconde surface de discontinuité [...] sépare à 2 900 km de profondeur le manteau du noyau.

Spanish

Campo(s) temático(s)
  • Vulcanología y sismología
  • Geofísica
DEF

Cada una de las superficies esféricas que, en el interior del globo terrestre, separan dos medios de propiedades físicas muy diferentes.

CONT

La existencia de discontinuidades se revela por los desvíos que experimentan las ondas sísmicas en el seno del globo [...]

Save record 2

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