TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

If there were sufficient NO_x in the remote troposphere, the tropospheric concentration of O₃ would double in about two weeks, and enhanced O₃ would lead to an enhanced "greenhouse" effect and possible climatic changes...  2, record 1, English, - tropospheric%20concentration

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

L'ozone est toxique pour l'homme, il affecte le rendement des cultures et il contribue au réchauffement climatique. Or, sa concentration dans la troposphère – la partie de l'atmosphère la plus proche de la surface terrestre et dont l'épaisseur varie entre 8 et 15 kilomètres environ – a continué à croître depuis le milieu des années 1990, en dépit de la réduction, par endroits, de certains des composants contribuant à sa formation, issus notamment du trafic routier.  2, record 1, French, - concentration%20troposph%C3%A9rique

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A maximum in large particle concentrations observed in the lower stratosphere between 15 and 25 km.  5, record 2, English, - stratospheric%20aerosol%20layer

Record number: 2, Textual support number: 1 CONT

While searching for debris from nuclear bomb tests, Christian Junge discovered in 1960 a layer of microscopic aerosol particles between the tropopause and about 18 miles (30 km) altitude. These particles are composed of sulfuric acid and water and are formed by the chemical transformation of sulfur-containing gases. This layer is called the Junge Layer or the Stratospheric Aerosol Layer.  6, record 2, English, - stratospheric%20aerosol%20layer

Record number: 2, Textual support number: 2 CONT

The relative maximum of the global vertical aerosol concentration profile in the lower stratosphere is commonly referred to as the Junge aerosol layer, or simply the Junge layer. It is of great importance to study the formation of this layer and to monitor its changes because of the possible impacts of these stratospheric aerosols to global climate. At present, the formation mechanism of the Junge layer is not well understood. Current theories of Junge layer formation include the injection of sulfate particles by volcanic eruptions, turbulent diffusion of tropospheric sulfates, natural(biogenic) emissions of carbonyl sulfide, and other processes.  7, record 2, English, - stratospheric%20aerosol%20layer

Record number: 2, Textual support number: 1 OBS

Stratospheric aerosols have a maximum concentration around 20 km and contain large fractions of sulfate.  8, record 2, English, - stratospheric%20aerosol%20layer

Record number: 2, Textual support number: 2 OBS

It is a worldwide phenomenon.  5, record 2, English, - stratospheric%20aerosol%20layer

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Couche d'aérosols de plusieurs kilomètres d'épaisseur située dans la stratosphère à une altitude d'environ 20 km  4, record 2, French, - couche%20d%27a%C3%A9rosols%20stratosph%C3%A9riques

Record number: 2, Textual support number: 1 CONT

Les sulfates disparaissent brusquement de la couche d'aérosols stratosphériques au-delà de 22-23 km d'altitude [...] Il semble donc qu'ils apparaîtraient à ce niveau par réaction [de l'acide sulfurique] néoformé sur l'ammoniac et qu'ils se sédimentent lentement vers le sol. Cette couche joue donc un rôle important dans le cycle biogéochimique du soufre et dans une moindre mesure dans celui de l'azote.  1, record 2, French, - couche%20d%27a%C3%A9rosols%20stratosph%C3%A9riques

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Concentración máxima de partículas grandes observada en la estratosfera baja entre 15 y 25 km.  1, record 2, Spanish, - capa%20de%20aerosol%20de%20Junge

Record number: 2, Textual support number: 1 OBS

Es un fenómeno mundial.  1, record 2, Spanish, - capa%20de%20aerosol%20de%20Junge

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A period during which an abnormally high concentration of tropospheric ozone is detected above a region.  2, record 3, English, - ozone%20episode

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Période pendant laquelle on observe une concentration anormalement élevée d'ozone troposphérique au-dessus d'une région.  2, record 3, French, - %C3%A9pisode%20d%27ozone

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The troposphere is a well-mixed reservoir with concentration C. Pollutants are injected into this reservoir at a rate R by man. They are removed from the reservoir by diffusion into the stratosphere where they are destroyed. The rate of removal depends on a diffusion process which to a first approximation is directly proportional to the tropospheric concentration. The proportionality constant is the exchange coefficient K between upper stratosphere and troposphere.  2, record 4, English, - proportionality%20constant

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish