Site de recherche sur le changement climatique, de l'Alaska. La libération de dioxyde de carbone par le dégel du pergélisol est mesurée avec la croissance de la toundra.

• Contributeur: Martin Shields / Alamy Banque D'Images
• ID de l’image: BE6TH3
• Taille du fichier: 50 MB (2,5 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 5110 x 3421 px | 43,3 x 29 cm | 17 x 11,4 inches | 300dpi
• Date de la prise de vue: 8 avril 2009

Informations supplémentaires

At a site in Healy, Alaska, near Denali National Park, a long term research project studies the release of carbon dioxide into the atmosphere by permafrost that is thawing due to global climate change. The project, led by Dr. Ted Schuur of University of Florida, has found that in the short term CO2 released from decomposing, melting permafrost leads to increased growth of local tundra vegetation. But in the longer term the thawing leads to increased atmospheric loading of CO2. One factor studied is the percentage composition of old isotopes of carbon that are found in CO2 that has been trapped in permafrost for hundreds or thousands of years. The wooden planks are for researchers to walk on without disturbing the site.

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• toundra