{"id":4801,"date":"2009-03-13T19:36:30","date_gmt":"2009-03-13T17:36:30","guid":{"rendered":"http:\/\/www.laterredufutur.com\/accueil1\/?p=4801"},"modified":"2015-04-13T19:37:51","modified_gmt":"2015-04-13T17:37:51","slug":"le-cycle-solaire-toujours-aussi-bas","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/le-cycle-solaire-toujours-aussi-bas\/","title":{"rendered":"le Cycle solaire toujours aussi bas"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p><span style=\"font-size: small;\">L&rsquo;activit\u00e9 solaire, en d\u00e9pit des pr\u00e9visions, continue \u00e0 se maintenir extr\u00eamement basse,\u00a0sa dilatation\u00a0est au\u00a0minimum\u00a0et d\u00e9finir un fait\u00a0exceptionnel est maintenant un euphemisme. Le mois de F\u00e9vrier a\u00a0fini avec une moyenne journali\u00e8re de taches solaires \u00e0 1.4. Le\u00a0r\u00e9sultat du mois de f\u00e9vrier qui s&rsquo;est termin\u00e9 en de\u00e7a du mois de janvier. Les deux premiers mois de 2009 pr\u00e9sentent une\u00a0faiblesse pire\u00a0que 2008. Pendant les premiers soixante jours de l&rsquo;an dernier, en effet, les seules t\u00e2ches solaires\u00a0produites avaient\u00a0une moyenne journali\u00e8re\u00a0 2.7 t\u00e2ches solaires, presque le double de 2009. Ce n&rsquo;est pas tout, le nombre de\u00a0t\u00e2ches solaires au jour\u00a0rejoignait, dans l&rsquo;ensemble, les 40 unit\u00e9s contre les 49 de cet annn\u00e9e. Mais nous voyons en d\u00e9tail le nombre de cet interminable minimum solaire.<\/span><\/p>\n<p>Nous vivons actuellement un nouveau cycle solaire au plus bas, les records du XXeme si\u00e8cle sont en train d&rsquo;\u00eatre battus en terme de nombre de t\u00e2ches solaires. Jamais l&rsquo;activit\u00e9 du soleil depuis le d\u00e9but du XIX eme si\u00e8cle a \u00e9t\u00e9 aussi calme.<\/p>\n<p>La situation actuelle rappelle \u00e9trangement le minimum de Dalton. Intensit\u00e9 tr\u00e8s faible du soleil o\u00f9 l&rsquo;on a pu observer derni\u00e8rement encore une t\u00e2che solaire du cycle 23. La Nasa en fait l&rsquo;echos actuellement.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Il est \u00e9vident que le rayonnement solaire re\u00e7u par la Terre est d\u00e9terminant pour la temp\u00e9rature \u00e0 la surface de la plan\u00e8te. Cependant, en l\u2019absence de l\u2019effet de serre naturel de l\u2019atmosph\u00e8re, la temp\u00e9rature moyenne \u00e0 la surface de notre plan\u00e8te serait de l\u2019ordre de \u201318\u00b0C alors qu\u2019elle est en r\u00e9alit\u00e9 de l\u2019ordre de 15\u00b0C. On voit donc que les deux facteurs, rayonnement solaire et effet de serre sont ceux qui d\u00e9terminent la temp\u00e9rature \u00e0 la surface de la Terre. Avant que l\u2019homme ne rejette massivement dans l\u2019atmosph\u00e8re les r\u00e9serves de carbone accumul\u00e9es dans les gisements de p\u00e9trole ou de charbon, ce sont surtout les fluctuations du rayonnement solaire qui influen\u00e7aient la temp\u00e9rature \u00e0 la surface de la Terre. Les plus connues de ces fluctuations (mais pas les seules) sont celles li\u00e9es au cycle de 11 ans du soleil. Le nombre de taches solaires, li\u00e9 \u00e0 ces cycles, a \u00e9t\u00e9 observ\u00e9 depuis le 17\u00e8me si\u00e8cle. On peut voir sur le graphique ci-dessous qu\u2019il y a des p\u00e9riodes o\u00f9 les cycles sont plus ou moins intenses ; en particulier, entre 1650 et 1700, il n\u2019y avait pas de taches solaires ; en revanche, au 20\u00e8me si\u00e8cle, on a relev\u00e9 une intensification des cycles apr\u00e8s la p\u00e9riode 1880 \u2013 1910. Le cycle le plus intense a lieu vers 1960.<\/p>\n<p><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/soleil_2.gif\" alt=\"\" \/><\/p>\n<p>Traduction, adaptation de la Terre du Futur<\/p>\n<p>sources : <a href=\"http:\/\/blogs.tv5.org\/\">http:\/\/blogs.tv5.org\/<\/a>\u00a0\/ <a href=\"http:\/\/daltonsminima.wordpress.com\/\">http:\/\/daltonsminima.wordpress.com\/<\/a>\u00a0\/ <a href=\"http:\/\/www.3bmeteo.com\/\">http:\/\/www.3bmeteo.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"4801\">(465)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>L&rsquo;activit\u00e9 solaire, en d\u00e9pit des pr\u00e9visions, continue \u00e0 se maintenir extr\u00eamement basse,\u00a0sa dilatation\u00a0est au\u00a0minimum\u00a0et d\u00e9finir un fait\u00a0exceptionnel est maintenant un&#8230;<\/p>\n","protected":false},"author":1,"featured_media":4802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[24],"tags":[1152,3594,1203,1258,3595,37],"class_list":["post-4801","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil","tag-activite-solaire","tag-cycles-solaires","tag-dalton","tag-faible","tag-minimum-solaire","tag-soleil","wpcat-24-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/mars2009.jpg?fit=450%2C322&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-1fr","jetpack-related-posts":[{"id":4712,"url":"https:\/\/www.laterredufutur.com\/accueil\/cycle-solaire-24-ou-minimum-de-dalton\/","url_meta":{"origin":4801,"position":0},"title":"Cycle solaire 24 ou minimum de Dalton","author":"Admin","date":"2 janvier 2009","format":false,"excerpt":"Vers un minimum de Dalton, nous avions vu certains points dans cet article. Depuis maintenant 1 an, le cycle solaire N\u00b024 a d\u00e9but\u00e9, il est toujours aussi pr\u00e9sent par son absence et son manque de t\u00e2ches solaires. Le d\u00e9but du cycle solaire 24 semble\u00a0s'\u00eatre mat\u00e9rialis\u00e9\u00a0puis a\u00a0abruptement disparu. La tache solaire\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/cycl3x.gif?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/cycl3x.gif?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/cycl3x.gif?resize=525%2C300 1.5x"},"classes":[]},{"id":12734,"url":"https:\/\/www.laterredufutur.com\/accueil\/quoi-de-neuf-concernant-lactivite-solaire-actuelle\/","url_meta":{"origin":4801,"position":1},"title":"Quoi de neuf concernant l&rsquo;activit\u00e9 solaire actuelle ?","author":"Admin","date":"23 juin 2016","format":false,"excerpt":"Disparition des t\u00e2ches solaires, Pour la deuxi\u00e8me fois ce mois-ci, le soleil est vide de taches solaires. Cette image du soleil prise par Solar Dynamics Observatory de la NASA sur June23rd montre aucune tache solaire\u00a0: Qu'est-ce que cela change\u00a0? Tous les 11 ans, le cycle solaire est comme une pendule,\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/06\/soleil-juin2016.gif?fit=512%2C512&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":20315,"url":"https:\/\/www.laterredufutur.com\/accueil\/cest-officiel-nous-sommes-dans-un-profond-minimum-solaire\/","url_meta":{"origin":4801,"position":2},"title":"C&rsquo;est officiel: nous sommes dans un \u00abprofond\u00bb minimum solaire","author":"Admin","date":"20 d\u00e9cembre 2019","format":false,"excerpt":"Le physicien solaire, le Dr Tony Phillips, \u00e9crit par mail ce qui suit : \"Le minimum solaire est officiellement \u00abprofond\u00bb. 2019 vient de battre un record de l'\u00e8re spatiale comptabilisant des jours sans taches solaires. De plus, un panel international de scientifiques dirig\u00e9 par la NOAA et la NASA pr\u00e9dit\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/12\/sun-12-16-19-SDO_1024_HMIIC.jpg?fit=720%2C720&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/12\/sun-12-16-19-SDO_1024_HMIIC.jpg?fit=720%2C720&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/12\/sun-12-16-19-SDO_1024_HMIIC.jpg?fit=720%2C720&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/12\/sun-12-16-19-SDO_1024_HMIIC.jpg?fit=720%2C720&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":18258,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-cycle-solaire-le-plus-calme-des-200-dernieres-annees\/","url_meta":{"origin":4801,"position":3},"title":"Le cycle solaire le plus calme des 200 derni\u00e8res ann\u00e9es","author":"Admin","date":"5 f\u00e9vrier 2019","format":false,"excerpt":"Le cycle solaire 24 a eu la plus faible activit\u00e9 solaire depuis le minimum de Dalton vers 1810. Par Frank Bosse et Fritz Vahrenholt. Notre soleil \u00e9tait \u00e9galement tr\u00e8s peu actif en d\u00e9cembre 2018. Nous d\u00e9passions le 121\u00e8me mois depuis le d\u00e9but du cycle num\u00e9ro 24. Tous les autres mois\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/02\/cycle-24-cycle25.png?fit=1200%2C912&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/02\/cycle-24-cycle25.png?fit=1200%2C912&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/02\/cycle-24-cycle25.png?fit=1200%2C912&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/02\/cycle-24-cycle25.png?fit=1200%2C912&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/02\/cycle-24-cycle25.png?fit=1200%2C912&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":20851,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-cycle-solaire-25-a-commence\/","url_meta":{"origin":4801,"position":4},"title":"Le cycle solaire 25 a commenc\u00e9","author":"Admin","date":"24 avril 2020","format":false,"excerpt":"Selon David Archibald, la feuille de courant h\u00e9liosph\u00e9rique s'est aplatie, ce qui signifie que le cycle solaire 24 est termin\u00e9 et nous sommes maintenant dans le cycle solaire 25. Le cycle solaire n'est pas termin\u00e9 tant que la nappe de courant h\u00e9liosph\u00e9rique ne s'est pas aplatie. Les donn\u00e9es sont fournies\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/04\/soleil-cycle-25.jpg?fit=800%2C478&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/04\/soleil-cycle-25.jpg?fit=800%2C478&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/04\/soleil-cycle-25.jpg?fit=800%2C478&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/04\/soleil-cycle-25.jpg?fit=800%2C478&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":18593,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-soleil-est-plus-calme-que-la-normale-mais-pas-de-panique\/","url_meta":{"origin":4801,"position":5},"title":"Le soleil est plus calme que la normale, mais pas de panique !","author":"Admin","date":"13 mars 2019","format":false,"excerpt":"Certains craignent que nous nous dirigions vers un autre petit \u00e2ge glaciaire, mais les scientifiques disent que c'est peu probable. Le soleil est calme\u2026 tr\u00e8s calme. En f\u00e9vrier, pour la premi\u00e8re fois depuis ao\u00fbt 2008, le soleil a pass\u00e9 un mois entier sans taches solaires. Les taches solaires sont des\u2026","rel":"","context":"Dans &quot;Soleil&quot;","block_context":{"text":"Soleil","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/soleil\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/soleil-1.jpg?fit=780%2C439&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/soleil-1.jpg?fit=780%2C439&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/soleil-1.jpg?fit=780%2C439&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/03\/soleil-1.jpg?fit=780%2C439&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4801","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=4801"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4801\/revisions"}],"predecessor-version":[{"id":4803,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/4801\/revisions\/4803"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/4802"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=4801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=4801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=4801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}