TERMIUM Plus®

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CONCENTRATION METHANE [1 record]

Record 1 2011-03-21

English

Subject field(s)
  • Pollutants
CONT

Interpretation of the observed methane concentration is complicated in that a number of atmospheric chemical reactions involving methane and other constituents, such as carbon monoxide, can lead to increases or decreases in atmospheric methane concentration. ... Observations made over the past decade at a number of stations show that the CH4 concentration is increasing at about 2% per year.

OBS

CH4 concentration: The number 4 is subscripted.

French

Domaine(s)
  • Agents de pollution
CONT

Certains auteurs pensent que la végétation se serait déjà adaptée à l'accroissement de la teneur en CO2, ce qui amplifierait les variations saisonnières. Ce fait serait confirmé par l'accroissement de la teneur en méthane dans l'atmosphère (accroissement de 1% par an).

OBS

teneur en CH4; concentration en CH4 : Le chiffre 4 s'écrit en indice.

Spanish

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