• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer

RealClimate

Climate science from climate scientists...

  • Start here
  • Model-Observation Comparisons
  • Miscellaneous Climate Graphics
  • Surface temperature graphics
You are here: Home / Extras / Glossary / Forçages

Forçages

28 Nov 2004 by group

Translations: (English)
English

Les forçages aux sens climatique du terme, correspondent aux conditions aux limites ou “entrées” (input du modèle climatique. Les changements de rayonnement solaire sont évidemment externes, de telle manière qu’ils forment toujours un forçage. C’est également vrai pour les changements de l’orbite terrestre (“Cycles de Milankovitch”). Par contre, cette définition est plus ambiguë quand on se rapproche de la surface de la planète. Dans les modèles n’incluant pas le cycle du carbone (c’est a dire la majorité), la concentration du CO2 est fixée en externe, ce qui peut donc être considéré comme un forçage également. Par contre, dans les modèles qui incluent le cycle du carbone, les changements de concentration en CO2 seront fonction du climat et des changements liés a l’activité industrielle. Dans ce cas, les niveaux de CO2 seront des rétroactions, et non pas des forçages. Presque tous les éléments constitutifs de l’atmosphère peuvent être considérées comme des rétroactions, et donc définir un forçage est réellement dépendant des rétroactions possibles dans le modèle, et dans quel but il est utilisé. Une bonne discussion des forçages récents peut être trouvée dans Hansen et al (2002) et dans Schmidt et al (2004).

Filed Under: Glossary

Primary Sidebar

Search

Search for:

Email Notification

get new posts sent to you automatically (free)
Loading

Recent Posts

  • Unforced variations: Oct 2025
  • “But you said the ice was going to disappear in 10 years!”
  • Time and Tide Gauges wait for no Voortman
  • Lil’ NAS Express
  • DOE CWG Report “Moot”?
  • Climate Scientists response to DOE report

Our Books

Book covers
This list of books since 2005 (in reverse chronological order) that we have been involved in, accompanied by the publisher’s official description, and some comments of independent reviewers of the work.
All Books >>

Recent Comments

  • Russell Seitz on “But you said the ice was going to disappear in 10 years!”
  • Kevin McKinney on “But you said the ice was going to disappear in 10 years!”
  • Kevin McKinney on Unforced variations: Oct 2025
  • Kevin McKinney on “But you said the ice was going to disappear in 10 years!”
  • MA Rodger on Unforced variations: Oct 2025
  • MA Rodger on Unforced variations: Oct 2025
  • MA Rodger on Unforced variations: Oct 2025
  • Barton Paul Levenson on Unforced variations: Oct 2025
  • Barton Paul Levenson on “But you said the ice was going to disappear in 10 years!”
  • Silvia Leahu-Aluas on Unforced variations: Oct 2025
  • Pete best on “But you said the ice was going to disappear in 10 years!”
  • Susan Anderson on “But you said the ice was going to disappear in 10 years!”
  • Mo Yunus on Unforced variations: Oct 2025
  • Geoff Miell on Unforced variations: Oct 2025
  • Russell Seitz on “But you said the ice was going to disappear in 10 years!”
  • Mo Yunus on “But you said the ice was going to disappear in 10 years!”
  • Mo Yunus on “But you said the ice was going to disappear in 10 years!”
  • Mo Yunus on “But you said the ice was going to disappear in 10 years!”
  • Piotr on Unforced variations: Oct 2025
  • Atomsk's Sanakan on Unforced variations: Oct 2025
  • Tomáš Kalisz on Unforced variations: Oct 2025
  • Kevin McKinney on “But you said the ice was going to disappear in 10 years!”
  • Kevin McKinney on “But you said the ice was going to disappear in 10 years!”
  • Kevin McKinney on “But you said the ice was going to disappear in 10 years!”
  • John Pollack on “But you said the ice was going to disappear in 10 years!”
  • Mal Adapted [also spelled "no mo' dodos"] on “But you said the ice was going to disappear in 10 years!”
  • Tomáš Kalisz on “But you said the ice was going to disappear in 10 years!”
  • Piotr on “But you said the ice was going to disappear in 10 years!”
  • MA Rodger on Unforced variations: Oct 2025
  • Russell Seitz on “But you said the ice was going to disappear in 10 years!”

Footer

ABOUT

  • About
  • Translations
  • Privacy Policy
  • Contact Page
  • Login

DATA AND GRAPHICS

  • Data Sources
  • Model-Observation Comparisons
  • Surface temperature graphics
  • Miscellaneous Climate Graphics

INDEX

  • Acronym index
  • Index
  • Archives
  • Contributors

Realclimate Stats

1,383 posts

11 pages

247,226 comments

Copyright © 2025 · RealClimate is a commentary site on climate science by working climate scientists for the interested public and journalists.