{"id":39951,"date":"2023-09-11T09:59:09","date_gmt":"2023-09-11T07:59:09","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=resume-foret-mail&#038;p=39951"},"modified":"2023-09-11T09:59:09","modified_gmt":"2023-09-11T07:59:09","slug":"les-arbres-archives-climatiques-mettent-en-evidence-la-cause-du-changement-climatique","status":"publish","type":"resume-foret-mail","link":"https:\/\/foretnature.be\/en\/resume-foret-mail\/les-arbres-archives-climatiques-mettent-en-evidence-la-cause-du-changement-climatique\/","title":{"rendered":"Les arbres, archives climatiques, mettent en \u00e9vidence la cause du changement climatique"},"content":{"rendered":"<p>Nos donn\u00e9es de mesures m\u00e9t\u00e9orologiques existent depuis 150 ans, une p\u00e9riode extr\u00eamement courte \u00e0 l\u2019\u00e9chelle de la vie sur terre. Les arbres peuvent rendre compte de mani\u00e8re indirecte, gr\u00e2ce \u00e0 leurs cernes, des diff\u00e9rents \u00e9pisodes climatiques. Mais c\u2019est une nouvelle \u00e9tude qui nous permet d\u2019obtenir de nouvelles informations bien plus pr\u00e9cises, dans les cellules des arbres cette fois-ci. Et le r\u00e9sultat est sans appel.<\/p>\n<p>Ce sont des pins scandinaves de plus de 1170 ans qui ont \u00e9t\u00e9 analys\u00e9s par l\u2019Institut f\u00e9d\u00e9ral suisse de recherche sur la for\u00eat, auteur de cette d\u00e9couverte. Ceux-ci sont bien pr\u00e9serv\u00e9s aux abords des lacs du nord, et particuli\u00e8rement sensibles aux changements de climat. Chaque cellule de chaque cerne enregistre le climat, et l\u2019ensemble des cellules d\u2019une cerne peut d\u00e9livrer des informations d\u2019une pr\u00e9cision exceptionnelle.<\/p>\n<p>On d\u00e9couvre que le r\u00e9chauffement actuel est bien plus in\u00e9dit que l\u2019on ne le pensait, m\u00eame face aux pr\u00e9c\u00e9dents r\u00e9chauffements comme celui de la p\u00e9riode m\u00e9di\u00e9vale. Les anciennes mesures prises comme exemple de r\u00e9f\u00e9rence ont donc \u00e9t\u00e9 mal \u00e9valu\u00e9es jusqu\u2019ici, ce qui implique une r\u00e9\u00e9valuation de l\u2019impact r\u00e9el du changement climatique.<\/p>\n<p>Si les arbres sont de bons indicateurs, il est \u00e9galement possible de reconstruire le climat gr\u00e2ce aux carottes glaciaires ou aux s\u00e9diments marins, jusqu\u2019\u00e0 plusieurs millions d\u2019ann\u00e9es en arri\u00e8re.<\/p>\n<p>Encore un exemple concret que la hausse des temp\u00e9ratures que nous rencontrons actuellement est le fait de l\u2019humain et de ses activit\u00e9s.<\/p>","protected":false},"excerpt":{"rendered":"<p>Nos donn\u00e9es de mesures m\u00e9t\u00e9orologiques existent depuis 150 ans, une p\u00e9riode extr\u00eamement courte \u00e0 l\u2019\u00e9chelle de la vie sur terre. Les arbres peuvent rendre compte de mani\u00e8re indirecte, gr\u00e2ce \u00e0 leurs cernes, des diff\u00e9rents \u00e9pisodes climatiques. Mais c\u2019est une nouvelle \u00e9tude qui nous permet d\u2019obtenir de nouvelles informations bien plus pr\u00e9cises, dans les cellules des [&hellip;]<\/p>","protected":false},"featured_media":39931,"template":"","categories":[50],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Les arbres, archives climatiques, mettent en \u00e9vidence la cause du changement climatique - For\u00eat.Nature<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/foretnature.be\/en\/resume-foret-mail\/les-arbres-archives-climatiques-mettent-en-evidence-la-cause-du-changement-climatique\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Les arbres, archives climatiques, mettent en \u00e9vidence la cause du changement climatique - For\u00eat.Nature\" \/>\n<meta property=\"og:description\" content=\"Nos donn\u00e9es de mesures m\u00e9t\u00e9orologiques existent depuis 150 ans, une p\u00e9riode extr\u00eamement courte \u00e0 l\u2019\u00e9chelle de la vie sur terre. 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