The Government of Canada’s terminology and linguistic data bank.

atmospheric concentration of greenhouse gases [1 record]

Record 1 1991-06-18


Subject field(s)
  • Climate Warming and Ozone Layer
  • Air Pollution

As a consequence of the long atmospheric lifetimes of GHGs, major reductions in emissions from current levels are required. Even after serious reductions in emissions, atmospheric concentrations of GHGs will fall only very slowly. Because of the heat capacity of the oceans, the climatic response would be delayed by decades more.


Concentrations are calculated in terms of "bundle" of greenhouse gases, so the plural forms "gases or GHGs" are usual for these terms. The calculation of the atmospheric concentration of a single greenhouse gas could also be possible.


  • Réchauffement climatique et couche d'ozone
  • Pollution de l'air

Rapport de mélange, généralement volumique, entre les molécules de gaz à effet de serre et les molécules d'air.


Les gaz à effet de serre sont des gaz traces. On calcule leur concentration par des rapports de mélanges volumiques : parties par million, par milliard ou, pour les constituants mineurs, par trillion. Cette grandeur sans unité l'avantage de ne pas faire référence aux conditions de température et de pression contrairement aux microgrammes par mètre cube du rapport de mélange massique.


Save record 1

Copyright notice for the TERMIUM Plus® data bank

© Public Works and Government Services Canada, 2020
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau


Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.

Writing tools

A collection of writing tools that cover the many facets of English and French grammar, style and usage.

Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.

Date Modified: