{"id":410,"date":"2010-04-05T09:12:50","date_gmt":"2010-04-05T09:12:50","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/04\/05\/la-calote-glaciere-arctique-presente-une-aire-de-14-millions-de-kilometres-carres\/"},"modified":"2012-07-12T12:13:33","modified_gmt":"2012-07-12T12:13:33","slug":"la-calote-glaciere-arctique-presente-une-aire-de-14-millions-de-kilometres-carres","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/04\/05\/la-calote-glaciere-arctique-presente-une-aire-de-14-millions-de-kilometres-carres\/","title":{"rendered":"La calotte glaciaire arctique pr\u00e9sente une aire de 14 millions de kilom\u00e8tres carr\u00e9s"},"content":{"rendered":"<p>L&#039;hiver 2009-2010 a \u00e9t\u00e9 rude sur l&#039;h\u00e9misph\u00e8re Nord et il semblerait que le printemps soit en retard. Cette impression est confirm\u00e9e par les mesures satellitaires de l&#039;aire de la calotte glaci\u00e8re. La surface mesur\u00e9e \u00e0 la fin du mois de Mars a atteint les 14 millions de kilom\u00e8tres carr\u00e9s nous dit l&#039;Arctic Regional Ocean Observing System (FIG., courbe rouge). Cette valeur d\u00e9passe la moyenne mesur\u00e9e durant les 30 derni\u00e8res ann\u00e9es et le maximum observ\u00e9 tend \u00e0 se d\u00e9placer plus en avant dans l&#039;ann\u00e9e. La diff\u00e9rence de&#160;glaciation par rapport \u00e0 2007 (courbe violette) qui avait affol\u00e9 tout le monde est remarquable. Les variations de glaciations observ\u00e9es dans l&#039;Arctique ces derni\u00e8res ann\u00e9es ne seraient-elles qu&#039;une partie de s\u00e9quence d&#039;oscillation climatique ordinaire?<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20133ec76d4ad970b-pi.jpg\"><img decoding=\"async\" alt=\"Surface-banquise-1979-2010\" class=\"asset asset-image at-xid-6a00d83451b18369e20133ec76d4ad970b \" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/07\/6a00d83451b18369e20133ec76d4ad970b-450wi.jpg\" \/><\/a> <\/p>\n<p>&#160;Les \u00e9tudes les plus r\u00e9centes sur les ph\u00e9nom\u00e8nes historiques de saisonnalit\u00e9 (diff\u00e9rence de temp\u00e9rature entre l&#039;\u00e9t\u00e9 et l&#039;hiver)&#160;dans l&#039;Atlantique Nord montrent que la notion de temp\u00e9rature moyenne du globe n&#039;a que bien peu de sens dans ce cas l\u00e0. C&#039;est ainsi que William Patterson de l&#039;Universit\u00e9 de Saskatchewan, en mesurant les proportions isotopiques de l&#039;oxyg\u00e8ne 18 dans les coquillages fossiles, pr\u00e9lev\u00e9s au nord-ouest de l&#039;Isalnde, vient de montrer que les temp\u00e9ratures du nord de l&#039;Europe entre -360 AV JC et 1660 avaient pu varier dans de tr\u00e8s grandes proportions au cours des si\u00e8cles \u00e9tudi\u00e9s. Il identifie apr\u00e8s une p\u00e9riode chaude allant jusqu&#039;en 400 (p\u00e9riode chaude Romaine) plusieurs phases de rapide refroidissement en Islande avec un minimum vers 1400 correspondant au Petit Age Glaci\u00e8re, suivies de phases de r\u00e9chauffement. <span style=\"text-decoration: underline\">Pour lui, sur la base de ses mesures,&#160;l&#039;affirmation selon laquelle nous vivrions actuellement un changement de temp\u00e9rature exceptionnel, beaucoup plus fort qu&#039;auparavant, est tout simplement fausse<\/span>. Nouveau pav\u00e9 dans la mare des adeptes de la simulation climatique dont les conclusions ne semblent pas r\u00e9sister \u00e0 la dure r\u00e9alit\u00e9 des faits exp\u00e9rimentaux.<\/p>\n<p>&#160;Il n&#039;est pas \u00e9vident que l&#039;\u00e9criture, en France, de lettres indign\u00e9es au Ministre de tutelle par ces tr\u00e8s nombreux savants, soit un acte suffisant pour redorer leur blason un peu terni dans la bataille. Ces fonctionnaires ont tout simplement oubli\u00e9 que c&#039;est de la confrontation des id\u00e9es, parfois rude, que sortiront des id\u00e9es nouvelles plus conformes \u00e0 la r\u00e9alit\u00e9 des faits mesur\u00e9s et quantifi\u00e9s.<\/p>\n<p><a href=\"http:\/\/arctic-roos.org\/observations\/satellite-data\/sea-ice\/ice-area-and-extent-in-arctic\" target=\"_blank\" title=\"ROOS\">ACCEDER<\/a> aux mesures et aux cartes de l&#039;ARTIC ROOS.<\/p>\n<p><a href=\"http:\/\/www.nature.com\/news\/2010\/100308\/full\/news.2010.110.html?s=news_rss&amp;utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+news\/rss\/news_s7+(NatureNews+-+Earth+and+Environment)&amp;utm_content=Netvibes\" target=\"_blank\" title=\"Patterson\">LIRE<\/a> le passionnant r\u00e9sum\u00e9 du dernier papier de William Patterson et <a href=\"http:\/\/www.pnas.org\/content\/early\/2010\/03\/02\/0902522107.full.pdf+html\" target=\"_blank\" title=\"PNAS\">ACCEDER<\/a> \u00e0 l&#039;article complet.<\/p>\n<p><a href=\"http:\/\/www.usask.ca\/communications\/ocn\/10-mar-12\/4.php\" target=\"_blank\" title=\"Saskatchewan\">VOIR<\/a> aussi l&#039;info sur le site de l&#039;Universit\u00e9 de Saskatchewan.<\/p>\n<p>&#160;&#160;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>L&#039;hiver 2009-2010 a \u00e9t\u00e9 rude sur l&#039;h\u00e9misph\u00e8re Nord et il semblerait que le printemps soit en retard. Cette impression est confirm\u00e9e par les mesures satellitaires de l&#039;aire de la calotte glaci\u00e8re. La surface mesur\u00e9e \u00e0 la fin du mois de Mars a atteint les 14 millions de kilom\u00e8tres carr\u00e9s nous dit l&#039;Arctic Regional Ocean Observing [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":21907,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-410","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La calotte glaciaire arctique pr\u00e9sente une aire de 14 millions de kilom\u00e8tres carr\u00e9s - leblogenergie.com<\/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:\/\/blogs.thesocialmedia.com\/leblogenergie\/2010\/04\/05\/la-calote-glaciere-arctique-presente-une-aire-de-14-millions-de-kilometres-carres\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"La calotte glaciaire arctique pr\u00e9sente une aire de 14 millions de kilom\u00e8tres carr\u00e9s - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"L&#039;hiver 2009-2010 a \u00e9t\u00e9 rude sur l&#039;h\u00e9misph\u00e8re Nord et il semblerait que le printemps soit en retard. 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