{"id":22853,"date":"2021-08-01T18:02:10","date_gmt":"2021-08-01T16:02:10","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=22853"},"modified":"2021-08-01T18:02:10","modified_gmt":"2021-08-01T16:02:10","slug":"quand-le-sahara-regorgeait-deau","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/quand-le-sahara-regorgeait-deau\/","title":{"rendered":"Quand le Sahara regorgeait d&rsquo;eau"},"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>Il y a de cela 10.000 \u00e0 11.000 ans, il pleuvait sur le Sahara. Ce qui est aujourd&rsquo;hui le plus grand d\u00e9sert chaud du monde accueillait une v\u00e9g\u00e9tation riche, des lacs, une faune vari\u00e9e avec des \u00e9l\u00e9phants, des girafes&#8230; Nos anc\u00eatres ont habit\u00e9 ces savanes et for\u00eats sahariennes, vivant de chasse et de cueillette.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/puAMk6CPt-g?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=fr-FR&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>\u00ab\u00a0C&rsquo;\u00e9tait dix fois plus humide qu&rsquo;aujourd&rsquo;hui\u00a0\u00bb, explique Jessica Tierney, sp\u00e9cialiste en g\u00e9osciences \u00e0 l&rsquo;universit\u00e9 de l&rsquo;Arizona, selon une \u00e9tude sur cette p\u00e9riode verdoyante de la r\u00e9gion saharienne dans la revue \u00ab\u00a0Science Advances\u00a0\u00bb. En comparaison, aujourd&rsquo;hui, la pluviom\u00e9trie est de 35 \u00e0 100 millim\u00e8tres par an&#8230;<\/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>En examinant des s\u00e9diments marins, l&rsquo;\u00e9quipe du professeur Tierney a pu retranscrire la pluviom\u00e9trie de la r\u00e9gion en remontant jusqu&rsquo;\u00e0 25.000 ans en arri\u00e8re. De quoi mettre en relief un lien entre les migrations d&rsquo;Homo sapiens et l&rsquo;humidit\u00e9 du lieu. En effet, certains scientifiques sugg\u00e8rent que les populations humaines ont quitt\u00e9 le Sahara au fur et \u00e0 mesure qu&rsquo;il se d\u00e9sertifiait. Or, selon les r\u00e9sultats recueillis par cette \u00e9quipe, les migrations se seraient produites il y a 8.000 ans&#8230; au milieu de la p\u00e9riode dite du \u00ab\u00a0Sahara vert\u00a0\u00bb.<\/p>\n<p>L&rsquo;explication ? Une p\u00e9riode d&rsquo;environ 1.000 ans, durant laquelle le Sahara serait devenu plus sec. Le mill\u00e9naire de s\u00e9cheresse (relative) aurait pouss\u00e9 les humains \u00e0 \u00e9migrer. Une fois cette p\u00e9riode termin\u00e9e, les humains seraient revenus, mais dans d&rsquo;autres circonstances.<\/p>\n<p>source : <a href=\"https:\/\/www.nouvelobs.com\/sciences\/20170315.OBS6618\/l-homme-est-il-responsable-de-la-desertification-du-sahara-il-y-a-8-000-ans.html\" rel=\"noopener\" target=\"_blank\">https:\/\/www.nouvelobs.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"22853\">(1863)<\/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>Il y a de cela 10.000 \u00e0 11.000 ans, il pleuvait sur le Sahara. Ce qui est aujourd&rsquo;hui le plus&#8230;<\/p>\n","protected":false},"author":1,"featured_media":22854,"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":"Quand le #Sahara regorgeait d'#eau @laterredufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[20],"tags":[1331,333,62,636,1330,99,684],"class_list":["post-22853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climat","tag-10000-ans","tag-eau","tag-pluie","tag-sahara","tag-source","tag-vert","tag-video","wpcat-20-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/08\/sahara-vert.jpg?fit=1000%2C667&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-5WB","jetpack-related-posts":[{"id":14657,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-sahara-etait-vert-il-y-a-plus-de-6000-ans-et-avait-10-fois-plus-de-pluie-quaujourdhui\/","url_meta":{"origin":22853,"position":0},"title":"Le Sahara \u00e9tait \u00abvert\u00bb il y a plus de 6000 ans et avait 10 fois plus de pluie qu&rsquo;aujourd&rsquo;hui","author":"Admin","date":"6 f\u00e9vrier 2017","format":false,"excerpt":"Selon une nouvelle \u00e9tude publi\u00e9e r\u00e9cemment dans la revue Advances Sciencemag, il est prouv\u00e9 que les humains occupaient une grande partie du Sahara au cours de la \u00abp\u00e9riode humide\u00bb d'il y a environ 8000 ans. Gr\u00e2ce \u00e0 une analyse des s\u00e9diments marins, des chercheurs de l'Universit\u00e9 de l'Arizona ont \u00e9tabli\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/vert-sahara-sphinx.jpg?fit=620%2C419&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/vert-sahara-sphinx.jpg?fit=620%2C419&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/01\/vert-sahara-sphinx.jpg?fit=620%2C419&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":3698,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-les-riveres-coulaient-dans-le-sahara-i\/","url_meta":{"origin":22853,"position":1},"title":"Quand les riv\u00e8res coulaient dans le Sahara I","author":"Admin","date":"12 octobre 2006","format":false,"excerpt":"Le climat n'est une chose statique, et change graduellement avec le temps. Ainsi des continents ont pu connaitre des changements majeurs au court des millions d'ann\u00e9es et des mill\u00e9naires. Ainsi le Sahara vu par Satellite quand les riv\u00e8res coulaient en son sein. Et aujourd'hui o\u00f9 en sommes nous ? Des\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/laterredufutur.com\/spaw\/images\/sahara_fossil_river.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":22633,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-gigantesque-tempete-de-poussiere-saharienne-sabat-sur-la-floride-et-le-sud-est-des-etats-unis\/","url_meta":{"origin":22853,"position":2},"title":"Une gigantesque temp\u00eate de poussi\u00e8re saharienne s&rsquo;abat sur la Floride et le sud-est des \u00c9tats-Unis","author":"Admin","date":"15 juin 2021","format":false,"excerpt":"La temp\u00eate saharienne se d\u00e9place aujourd'hui sur la Floride et sur d'autres parties du Sud-Est plus tard dans la semaine. Des lueurs vibrantes sont visibles du lever et au coucher du soleil ! Le ciel sera orange et brumeux sur la Floride en milieu de semaine et le restera jusqu'\u00e0\u2026","rel":"","context":"Dans &quot;M\u00e9t\u00e9orologie&quot;","block_context":{"text":"M\u00e9t\u00e9orologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/meteorologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/06\/tempete-saharienne-atlantique.jpg?fit=1000%2C562&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/06\/tempete-saharienne-atlantique.jpg?fit=1000%2C562&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/06\/tempete-saharienne-atlantique.jpg?fit=1000%2C562&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/06\/tempete-saharienne-atlantique.jpg?fit=1000%2C562&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":514,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-sahara-reverdit-iii\/","url_meta":{"origin":22853,"position":3},"title":"Le Sahara reverdit III","author":"Admin","date":"6 septembre 2011","format":false,"excerpt":"Depuis 2004, nous constations un reverdissement du sahel \u00e0 contrario de tous les dires m\u00e9diatiques. Ainsi certains scientifiques nous apportaient \u00e0 l'\u00e9poque cette recherche : \"Le Sahel reverdit\u00a0! Ce n'est pas une incantation, mais une tendance bel et bien observ\u00e9e par des chercheurs qui ont d\u00e9pouill\u00e9 quinze ans de photographies\u2026","rel":"","context":"Dans &quot;Ecologie&quot;","block_context":{"text":"Ecologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/ecologie\/"},"img":{"alt_text":"sahel reverdissement","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/09\/sahel-reverdissement.jpg?fit=370%2C284&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2628,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-sahara-reverdit\/","url_meta":{"origin":22853,"position":4},"title":"Le Sahara reverdit","author":"Admin","date":"27 d\u00e9cembre 2004","format":false,"excerpt":"Le Sahel reverdit\u00a0! Ce n'est pas une incantation, mais une tendance bel et bien observ\u00e9e par des chercheurs qui ont d\u00e9pouill\u00e9 quinze ans de photographies satellites de la r\u00e9gion. Ces g\u00e9ographes europ\u00e9ens affirment que les terres cultivables commencent \u00e0 reprendre progressivement du terrain. Une bonne nouvelle\u00a0! D\u00e9cid\u00e9ment le changement climatique\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/maro0588.jpeg?fit=512%2C341&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":25255,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-etude-revele-pourquoi-et-quand-le-desert-du-sahara-est-devenu-vert\/","url_meta":{"origin":22853,"position":5},"title":"Une \u00e9tude r\u00e9v\u00e8le pourquoi et quand le d\u00e9sert du Sahara est devenu vert","author":"Admin","date":"17 octobre 2023","format":false,"excerpt":"Notre plan\u00e8te a beaucoup \u00e9volu\u00e9 au cours de milliards d'ann\u00e9es, de l'emplacement des continents \u00e0 la composition de l'atmosph\u00e8re. Une nouvelle \u00e9tude examine en d\u00e9tail l'histoire du d\u00e9sert du Sahara, qui n'a pas toujours \u00e9t\u00e9 une r\u00e9gion sauvage et aride. Des chercheurs finlandais et britanniques ont reconstitu\u00e9 les transformations p\u00e9riodiques\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/desert-du-sahara.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/desert-du-sahara.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/desert-du-sahara.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/09\/desert-du-sahara.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/22853","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=22853"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/22853\/revisions"}],"predecessor-version":[{"id":22855,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/22853\/revisions\/22855"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/22854"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=22853"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=22853"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=22853"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}