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La glace des calottes polaires enregistre la composante atmospherique des changements climatiques passes. Ces donnees viennent donc completer les informations fournies par les sediments marins et les archives continentales. La reconstruction de l'evolution des gaz a effet de serre constitue une des specificites de l'etude des carottes de glace. Elle permet d'analyser le role de ces gaz dans le forcage...
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