{"id":64102,"date":"2018-03-09T22:52:04","date_gmt":"2018-03-09T22:52:04","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/cambios-climaticos-a-escala-astronomica-y-milenaria-registrados-en-el-mediterraneo-occidental\/"},"modified":"2018-03-09T22:52:04","modified_gmt":"2018-03-09T22:52:04","slug":"cambios-climaticos-a-escala-astronomica-y-milenaria-registrados-en-el-mediterraneo-occidental","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/paleontologia\/cambios-climaticos-a-escala-astronomica-y-milenaria-registrados-en-el-mediterraneo-occidental\/","title":{"rendered":"Cambios clim\u00e1ticos a escala astron\u00f3mica y milenaria registrados en el mediterr\u00e1neo occidental"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Beatriz Gonz\u00e1lez Mora <\/strong><\/h2>\n<p>Se han estudiado las asociaciones de foramin\u00edferos planct\u00f3nicos y  la geoqu\u00edmica en muestras del mar de albor\u00e1n y el golfo de le\u00f3n) para analizar los cambios en la microfauna, el paleoclima y la paleoceanograf\u00eda en el mediterr\u00e1neo occidental durante los \u00faltimos 250 ka. las asociaciones de foramin\u00edferos planct\u00f3nicos en el mar de albor\u00e1n parecen haber estado controladas principalmente por cambios en la temperatura del agua superficial (sst), lo que confirma la variabilidad milenaria observada en anteriores estudios.  Varios posibles eventos heinrich  tuvieron lugar causaron un dr\u00e1stico y r\u00e1pido descenso en la productividad superficial y una estratificaci\u00f3n de la columna de agua por densidad.  Adem\u00e1s, se han reconocido cuatro capas ricas en materia org\u00e1nica cuya formaci\u00f3n se relaciona con la llegada de aguas isot\u00f3picamente m\u00e1s ligeras causada por un aumento en las precipitaciones sobre la regi\u00f3n mediterr\u00e1nea o una mayor influencia de las aguas atl\u00e1nticas debido a un mayor intercambio a trav\u00e9s del estrecho de gibraltar bajo condiciones de estratificaci\u00f3n de la columna de agua y alta productividad superficial.  se han reconstruido las sst en el mar de albor\u00e1n basadas en el m\u00e9todo de los an\u00e1logos modernos aplicado a los foramin\u00edferos planct\u00f3nicos y utilizando la relaci\u00f3n mg\/ca. Ambos resultados son similares aunque la relaci\u00f3n mg\/ca presenta ciertas ventajas.  con el fin de evaluar los  factores que controlan la tasa calcificaci\u00f3n en los foramin\u00edferos planct\u00f3nicos y si su peso se puede utilizar como indicador de co2 atmosf\u00e9rico, se ha estudiado la evoluci\u00f3n del peso de los foramin\u00edferos en diferentes especies y parece que dicho par\u00e1metro debe ser utilizado con cautela. finalmente, los cambios en la asociaci\u00f3n de foramin\u00edferos bent\u00f3nicos entre 27 y 57 ka en el golfo de le\u00f3n parecen haber estado controlados fuertemente por la variabilidad milenaria dansgaard-oeschger, que pudo haber afectado a la oceanograf\u00eda de todo el  mediterr\u00e1neo.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Cambios clim\u00e1ticos a escala astron\u00f3mica y milenaria registrados en el mediterr\u00e1neo occidental<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Cambios clim\u00e1ticos a escala astron\u00f3mica y milenaria registrados en el mediterr\u00e1neo occidental <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Beatriz Gonz\u00e1lez Mora <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Salamanca<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 21\/04\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Francisco Javier Sierro S\u00e1nchez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan Grimalt obrador <\/li>\n<li>guillermo Franc\u00e9s pedraz (vocal)<\/li>\n<li>susana Mart\u00edn lebreiro (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Beatriz Gonz\u00e1lez Mora Se han estudiado las asociaciones de foramin\u00edferos planct\u00f3nicos y la geoqu\u00edmica en muestras del [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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