{"id":868982,"date":"2019-06-09T19:46:55","date_gmt":"2019-06-09T18:46:55","guid":{"rendered":"https:\/\/www.pressenza.com\/?p=868982"},"modified":"2019-06-09T19:46:55","modified_gmt":"2019-06-09T18:46:55","slug":"cientificos-hallan-una-nueva-fuente-del-campo-magnetico-de-la-tierra","status":"publish","type":"post","link":"https:\/\/www.pressenza.com\/es\/2019\/06\/cientificos-hallan-una-nueva-fuente-del-campo-magnetico-de-la-tierra\/","title":{"rendered":"Cient\u00edficos hallan una nueva fuente del campo magn\u00e9tico de la Tierra"},"content":{"rendered":"<p><strong>Una forma de \u00f3xido de hierro, la hematita, retiene sus propiedades magn\u00e9ticas a temperaturas equivalentes a las del manto de nuestro planeta.<\/strong><\/p>\n<p>Un equipo internacional de investigadores descubri\u00f3 que el manto terrestre contribuye a la creaci\u00f3n del campo magn\u00e9tico, desmintiendo la idea de que el magnetismo de nuestro planeta, crucial para la vida, se genera solo por la corteza y el n\u00facleo de la Tierra. El\u00a0<a href=\"https:\/\/www.nature.com\/articles\/s41586-019-1254-8\" target=\"_blank\" rel=\"noopener noreferrer\">art\u00edculo<\/a>\u00a0fue publicado este mi\u00e9rcoles en la revista Nature.<\/p>\n<div class=\"arcticle__read-more read-more\"><a class=\"read-more__link\" href=\"https:\/\/actualidad.rt.com\/actualidad\/286024-reversion-campo-magnetico-tierra-podria\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" class=\"read-more__cover\" src=\"https:\/\/cdni.rt.com\/actualidad\/public_images\/2018.08\/thumbnail\/5b7d05c208f3d9152a8b4569.jpg\" alt=\"Imagen ilustrativa\" \/><span class=\"read-more__footer\">La reversi\u00f3n del campo magn\u00e9tico de la Tierra podr\u00eda ser m\u00e1s r\u00e1pida de lo que se pensaba<\/span><\/a><\/div>\n<p>Generalmente se piensa que esa capa del planeta es &#8216;<strong>magn\u00e9ticamente muerta&#8217;<\/strong>\u00a0debido a la enorme presi\u00f3n y temperatura que privan a los \u00f3xidos\u00a0de hierro de sus propiedades magn\u00e9ticas.<\/p>\n<p>No obstante, el equipo liderado por el doctor Ily\u00e1 Kupenko, de la Universidad de M\u00fcnster, logr\u00f3 recrear las condiciones extremas del manto y revel\u00f3 que por lo menos un mineral de ese tipo, la\u00a0<strong>hematita<\/strong>, retiene la capacidad de crear el campo magn\u00e9tico a temperaturas de cerca de\u00a0<strong>925 \u00baC<\/strong>.<\/p>\n<p>Por lo tanto, algunas partes de la llamada &#8216;<strong>zona de transici\u00f3n&#8217;<\/strong>\u00a0\u2014la capa entre el manto exterior y el manto inferior, que se extiende\u00a0<strong>entre 410 y 660 kil\u00f3metros<\/strong>\u00a0bajo la superficie de la Tierra\u2014, participan en la creaci\u00f3n de la magnetosfera terrestre.<\/p>\n<p>En particular, se trata de las placas tect\u00f3nicas subducidas relativamente fr\u00edas, conocidas como &#8216;losas&#8217;, que se ubican principalmente debajo de la regi\u00f3n occidental del Pac\u00edfico.<\/p>\n<p>\u00abEse nuevo conocimiento sobre el manto terrestre y la regi\u00f3n fuertemente magn\u00e9tica del Pac\u00edfico occidental podr\u00eda arrojar nueva luz sobre cualquier observaci\u00f3n del campo magn\u00e9tico de la Tierra\u00bb, cita a Kupenko el\u00a0<a href=\"https:\/\/www.uni-muenster.de\/news\/view.php?cmdid=10326&amp;lang=en\" target=\"_blank\" rel=\"noopener noreferrer\">comunicado<\/a>emitido por la Universidad de M\u00fcnster.<\/p>\n<div class=\"video-iframe\"><iframe loading=\"lazy\" id=\"widget4\" src=\"https:\/\/www.youtube.com\/embed\/C05-NMLLgk4?enablejsapi=1\" width=\"100%\" height=\"100%\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/div>\n<p>La magnetosfera, que defiende la superficie de la Tierra de los mort\u00edferos rayos c\u00f3smicos, sigue siendo un objeto mal estudiado.<\/p>\n<p>Por ahora la ciencia no ha establecido con precisi\u00f3n las\u00a0<strong>causas del movimiento de los polos<\/strong>\u00a0magn\u00e9ticos (estos no deben confundirse con los polos geogr\u00e1ficos), que se ha acelerado en las \u00faltimas d\u00e9cadas. La probable\u00a0<strong>inversi\u00f3n de polaridad\u00a0<\/strong>\u2014evento que se produce ordinariamente cada 200.000 o 300.000 a\u00f1os, pero no ha ocurrido en los \u00faltimos 780.000 a\u00f1os\u2014\u00a0<strong>afectar\u00eda gravemente a la civilizaci\u00f3n humana<\/strong>, indica el comunicado.<\/p>\n<p>\u00abLo que ahora sabemos \u2014que hay materiales ordenados magn\u00e9ticamente en el manto de del planeta\u2014 deber\u00eda tenerse en cuenta en cualquier an\u00e1lisis futuro del campo magn\u00e9tico de la Tierra y del movimiento de los polos\u00bb, explic\u00f3 la importancia del estudio\u00a0el coautor, Leonid Dubrovinsky, de la Universidad de Bayreuth.<\/p>\n<div class=\"video-iframe\"><iframe loading=\"lazy\" id=\"widget2\" src=\"https:\/\/www.youtube.com\/embed\/ZIdL12EELvQ?enablejsapi=1\" width=\"100%\" height=\"100%\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\" data-mce-fragment=\"1\"><\/iframe><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Una forma de \u00f3xido de hierro, la hematita, retiene sus propiedades magn\u00e9ticas a temperaturas equivalentes a las del manto de nuestro planeta. Un equipo internacional de investigadores descubri\u00f3 que el manto terrestre contribuye a la creaci\u00f3n del campo magn\u00e9tico, desmintiendo&hellip;<\/p>\n","protected":false},"author":1181,"featured_media":868983,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[497,66],"tags":[5374,598,56437,23317],"class_list":["post-868982","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-tecnologia","category-europa-es","tag-alemania","tag-ciencia","tag-fisica-es","tag-internacional"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cient\u00edficos hallan una nueva fuente del campo magn\u00e9tico de la Tierra<\/title>\n<meta name=\"description\" content=\"Una forma de \u00f3xido de hierro, la hematita, retiene sus propiedades magn\u00e9ticas a temperaturas equivalentes a las del manto de nuestro planeta. 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