{"id":33500,"date":"2017-09-25T08:36:27","date_gmt":"2017-09-25T12:36:27","guid":{"rendered":"http:\/\/uqactualite.odev.ca\/?p=33500"},"modified":"2017-09-25T08:36:27","modified_gmt":"2017-09-25T12:36:27","slug":"luqac-contribue-a-une-etude-sur-le-plateau-tibetain","status":"publish","type":"post","link":"https:\/\/www.uqac.ca\/uqactualites\/2017\/09\/25\/luqac-contribue-a-une-etude-sur-le-plateau-tibetain\/","title":{"rendered":"L\u2019UQAC contribue \u00e0 une \u00e9tude sur le plateau tib\u00e9tain"},"content":{"rendered":"<p style=\"text-align: justify\">Selon une \u00e9tude publi\u00e9e le 3 juillet dernier dans la tr\u00e8s prestigieuse revue<em> Proceedings of the National Academy of Sciences<\/em> (PNAS), la saison de croissance des arbres sur le plateau tib\u00e9tain a augment\u00e9 de 24 jours depuis 1960. L\u2019article, intitul\u00e9 <a href=\"http:\/\/www.pnas.org\/content\/114\/27\/6966.full?sid=d68fde7c-eb1c-400f-a2d6-c2052c333f00\"><strong><em>New perspective on spring vegetation phenology and global climate change based on Tibetan Plateau tree-ring data<\/em><\/strong><\/a>, est le r\u00e9sultat d\u2019une collaboration internationale entre chercheurs de trois continents. Sergio Rossi, professeur au D\u00e9partement des sciences fondamentales de l\u2019UQAC et professeur associ\u00e9 \u00e0 L\u2019Acad\u00e9mie des sciences de la Chine (Guangzhou), a cosign\u00e9 l\u2019\u00e9tude avec huit autres chercheurs provenant de la Chine, de l\u2019Allemagne, de la Russie et de la Su\u00e8de.<\/p>\n<p style=\"text-align: justify\">L\u2019analyse a \u00e9t\u00e9 effectu\u00e9e au Tibet sur 3 000 arbres. Immense territoire avec une \u00e9l\u00e9vation moyenne de 4 000 m\u00e8tres, le Tibet repr\u00e9sente la r\u00e9gion ayant la plus haute altitude au monde. Depuis 54\u00a0ans, la r\u00e9activation printani\u00e8re de la croissance d\u00e9bute 2 semaines plus t\u00f4t et se termine 9 jours plus tard. Les changements les plus importants ont \u00e9t\u00e9 observ\u00e9s depuis les 32 derni\u00e8res ann\u00e9es. L\u2019\u00e9tude a d\u00e9termin\u00e9 qu\u2019un r\u00e9chauffement de 1 \u00b0C de la temp\u00e9rature d\u2019avril \u00e0 juin est suffisant pour anticiper la saison de croissance d\u2019une semaine. Les modifications observ\u00e9es dans la saison de croissance des arbres sont reli\u00e9es avec le r\u00e9chauffement climatique en cours et pourraient affecter la quantit\u00e9 de carbone s\u00e9questr\u00e9 par les \u00e9cosyst\u00e8mes forestiers froids de la plan\u00e8te.<\/p>\n<p style=\"text-align: justify\"><span style=\"color: #808080\"><strong>\u00a9 Ren Ping<\/strong><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Selon une \u00e9tude publi\u00e9e le 3 juillet dernier dans la tr\u00e8s prestigieuse revue Proceedings of the National Academy of Sciences (PNAS), la saison de croissance des arbres sur le plateau tib\u00e9tain a augment\u00e9 de 24 jours depuis 1960. L\u2019article, intitul\u00e9 New perspective on spring vegetation phenology and global climate change based on Tibetan Plateau tree-ring [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":33501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>L\u2019UQAC contribue \u00e0 une \u00e9tude sur le plateau tib\u00e9tain - UQACtualit\u00e9s<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.uqac.ca\/uqactualites\/2017\/09\/25\/luqac-contribue-a-une-etude-sur-le-plateau-tibetain\/\" \/>\r\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"L\u2019UQAC contribue \u00e0 une \u00e9tude sur le plateau tib\u00e9tain - UQACtualit\u00e9s\" \/>\r\n<meta property=\"og:description\" content=\"Selon une \u00e9tude publi\u00e9e le 3 juillet dernier dans la tr\u00e8s prestigieuse revue Proceedings of the National Academy of Sciences (PNAS), la saison de croissance des arbres sur le plateau tib\u00e9tain a augment\u00e9 de 24 jours depuis 1960. 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