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Incertitude dans les prévisions concernant la réponse climatique aux émissions croissantes de gaz à effet de serre.

Uncertainty in predictions of the climate response to rising levels of greenhouse gases.

Auteurs : STAINFORTH D. A., AINA T., CHRISTENSEN C., et al.

Type d'article : Article

Résumé

The range of possibilities for future climate evolution needs to be taken into account when planning climate change mitigation and adaptation strategies. This requires ensembles of multi-decadal simulations to assess both chaotic climate variability and model response uncertainty. Statistical estimates of model response uncertainty, based on observations of recent climate change, admit climate sensitivities-defined as the equilibrium response of global mean temperature to doubling levels of atmospheric carbon dioxide-substantially greater than 5 K. But such strong responses are not used in ranges for future climate change because they have not been seen in general circulation models. The authors present results from the 'climateprediction.net' experiment, the first multi-thousand-member grand ensemble of simulations using a general circulation model and thereby explicitly resolving regional details.

Détails

  • Titre original : Uncertainty in predictions of the climate response to rising levels of greenhouse gases.
  • Identifiant de la fiche : 2005-2295
  • Langues : Anglais
  • Sujet : Environnement, Généralités
  • Source : Nature - vol. 433 - n. 7024
  • Date d'édition : 27/01/2005

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