{"id":29462,"date":"2023-01-22T16:59:10","date_gmt":"2023-01-22T16:59:10","guid":{"rendered":"https:\/\/gifex.com\/fr\/?post_type=ficha&#038;p=29462"},"modified":"2023-01-22T17:01:17","modified_gmt":"2023-01-22T17:01:17","slug":"image-satellite-de-dunes-dans-le-sahara-algerien","status":"publish","type":"ficha","link":"https:\/\/gifex.com\/fr\/fichier\/image-satellite-de-dunes-dans-le-sahara-algerien\/","title":{"rendered":"Image satellite de dunes dans le Sahara alg\u00e9rien"},"content":{"rendered":"<p>Image satellite de la partie terminale occidentale d\u2019un immense champs de dunes dans la wilaya de Tindouf, au nord de l\u2019erg Iguidi. Ici, les dunes sont de moindre taille que celles situ\u00e9es plus \u00e0 l\u2019est o\u00f9 elle peuvent d\u00e9passer les 100 km de longueur. Il est possible que ces dunes soient fossiles et donc relativement anciennes et inertes. Le zoom permet d\u2019observer de plus petites accumulations de sables clairs \u201cen \u00e9toiles\u201d entre les grandes dunes sombres. Ces petites accumulations, tr\u00e8s probablement actuelles et actives, t\u00e9moignent de vents d\u2019orientations multiples, permettant ces morphologies caract\u00e9ristiques. Le plus souvent, le vent dominant fa\u00e7onnant les dunes transverses est orient\u00e9 \u00e0 90\u00b0 par rapport aux dunes, tandis que les dunes en \u00e9toiles sont soumises \u00e0 3 vents d\u2019orientations diff\u00e9rentes, les contraignant dans l\u2019espace autour d\u2019un noyau central.<\/p>\n<p>Photo de dunes dans le Sahara alg\u00e9rien, prise le 7 mars 2017 par Thomas Pesquet depuis l\u2019ISS. Cr\u00e9dit : ESA\/NASA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Partie terminale occidentale d\u2019un immense champs de dunes dans la wilaya de Tindouf, au nord de l\u2019erg Iguidi. Ici, les dunes sont de moindre taille que celles <\/p>\n","protected":false},"author":1,"featured_media":29463,"template":"","categoria_ficha":[1979],"class_list":["post-29462","ficha","type-ficha","status-publish","has-post-thumbnail","hentry","categoria_ficha-cartes-de-tindouf"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Image satellite de dunes dans le Sahara alg\u00e9rien - Gifex<\/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:\/\/gifex.com\/fr\/fichier\/image-satellite-de-dunes-dans-le-sahara-algerien\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Image satellite de dunes dans le Sahara alg\u00e9rien - Gifex\" \/>\n<meta property=\"og:description\" content=\"Partie terminale occidentale d\u2019un immense champs de dunes dans la wilaya de Tindouf, au nord de l\u2019erg Iguidi. 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