{"id":13919,"date":"2023-01-09T23:27:18","date_gmt":"2023-01-09T22:27:18","guid":{"rendered":"https:\/\/www.cerege.fr\/?page_id=13919"},"modified":"2023-01-12T10:32:48","modified_gmt":"2023-01-12T09:32:48","slug":"applications-de-lunite-radiocarbone","status":"publish","type":"page","link":"https:\/\/www.cerege.fr\/fr\/equipements\/poles-techniques\/geochimie-organique-inorganique-et-isotopique-2\/unite-du-radiocarbone\/applications-de-lunite-radiocarbone\/","title":{"rendered":"Applications de l&#8217;Unit\u00e9 Radiocarbone"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"13919\" class=\"elementor elementor-13919\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-422f39ea elementor-section-full_width elementor-section-height-min-height elementor-section-height-default elementor-section-items-middle\" data-id=\"422f39ea\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5955d7db\" data-id=\"5955d7db\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ee9c7cd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ee9c7cd\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-339f7767\" data-id=\"339f7767\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1e72fa43 elementor-widget elementor-widget-shortcode\" data-id=\"1e72fa43\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><nav aria-label=\"breadcrumbs\">\n            <div class=\"breadcrumb-container theme1\">\n                <ol>\n                                    <\/ol>\n            <\/div>\n        <\/nav>    <script type=\"application\/ld+json\">\n        {\n            \"@context\": \"http:\/\/schema.org\",\n            \"@type\": \"BreadcrumbList\",\n            \"itemListElement\": [\n                            ]\n        }\n    <\/script>\n   \n    <script>\n            <\/script>\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5a21ecd4 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5a21ecd4\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-extended\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-78da8f79\" data-id=\"78da8f79\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-4a16e2ab\" data-id=\"4a16e2ab\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-72c6b680 elementor-widget elementor-widget-heading\" data-id=\"72c6b680\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Calibration du radiocarbone et cycle du carbone global<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f3b41cc elementor-widget elementor-widget-text-editor\" data-id=\"7f3b41cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Dans sa forme originale, la datation radiocarbone n&#8217;est pas exacte car la teneur atmosph\u00e9rique en <sup>14<\/sup>C ne reste pas constante au fil du temps. Cette teneur a vari\u00e9 en raison des changements du taux de production par les rayons cosmiques, ainsi que des r\u00e9arrangements du cycle biog\u00e9ochimique du carbone. Pour calculer l\u2019\u00e2ge d\u2019un objet ancien \u00e0 partir de la mesure du <sup>14<\/sup>C qu\u2019il contient, il faut conna\u00eetre la teneur en <sup>14<\/sup>C de l\u2019atmosph\u00e8re contemporaine de l\u2019\u00e9poque d\u2019apparition de cet objet. L\u2019\u00e2ge radiocarbone initial est donc corrig\u00e9 (on dit calibr\u00e9) en comparant la teneur en <sup>14<\/sup>C mesur\u00e9e avec celles d\u2019autres \u00e9chantillons pour lesquels des \u00e2ges justes et pr\u00e9cis ont \u00e9t\u00e9 mesur\u00e9s par des m\u00e9thodes ind\u00e9pendantes comme le comptage des cernes annuels des arbres ou la datation des carbonates par la m\u00e9thode \u00e0 l\u2019uranium-thorium (U-Th). Depuis trente ans, les courbes de calibration du radiocarbone sont pr\u00e9par\u00e9es par le groupe de travail international IntCal auquel le CEREGE participe depuis sa fondation.<\/p><p>La derni\u00e8re it\u00e9ration de la calibration IntCal20 (Reimer et al. 2020, Heaton et al. 2020, 2021, 2022, 2023, Bard et al. 2020) inclut notamment les r\u00e9sultats obtenus gr\u00e2ce au spectrom\u00e8tre AixMICADAS (Bard et al. 2015) mesur\u00e9s dans le cadre des projets EQUIPEX ASTER-CEREGE et ANR CARBOTRYDH (Capano et al. 2018, 2020a). La qualit\u00e9 des datations r\u00e9alis\u00e9es par AixMICADAS a \u00e9t\u00e9 d\u00e9montr\u00e9e dans le cadre d\u2019une intercomparaison internationale sur des s\u00e9ries d\u2019arbres subfossiles (Wacker et al. 2020).<\/p><p>En parall\u00e8le \u00e0 l\u2019am\u00e9lioration de la justesse du chronom\u00e8tre radiocarbone, l\u2019enregistrement des variations naturelles du <sup>14<\/sup>C est essentiel pour notre compr\u00e9hension de processus climatiques, des variations de l&#8217;activit\u00e9 solaire, de l\u2019intensit\u00e9 de la g\u00e9odynamo et du cycle biog\u00e9ochimique du carbone. Le d\u00e9veloppement d&#8217;un enregistrement du <sup>14<\/sup>C sur 50 000 ans permet d\u2019\u00e9tudier et de simuler les processus terrestres et d\u2019am\u00e9liorer les mod\u00e8les informatiques utilis\u00e9s pour les projections du changement climatique actuel (Heaton et al. 2021). En effet, les simulations climatiques compil\u00e9es par le Groupe d&#8217;experts intergouvernemental sur l&#8217;\u00e9volution du climat (GIEC) s&#8217;appuient sur le <sup>14<\/sup>C comme indicateur de l\u2019activit\u00e9 solaire et en tant que traceur du cycle global du carbone \u2013 ainsi que bien s\u00fbr comme chronom\u00e8tre pour la plupart des s\u00e9ries pal\u00e9oclimatiques des 50 000 derni\u00e8res ann\u00e9es. Nos enregistrements r\u00e9alis\u00e9s sur des bois provenant des Alpes fran\u00e7aises sont compar\u00e9s \u00e0 des r\u00e9sultats similaires pour l\u2019h\u00e9misph\u00e8re sud (Nouvelle-Z\u00e9lande et Tasmanie) ce qui permet d\u2019\u00e9tudier les \u00e9changes interh\u00e9misph\u00e9riques et l\u2019\u00e9volution des flux de CO<sub>2<\/sub> vers l\u2019atmosph\u00e8re (Capano et al. 2020). Le <sup>14<\/sup>C nous renseigne aussi sur l\u2019occurrence dans le pass\u00e9 d\u2019\u00e9ruptions solaires extr\u00eames, avec des amplitudes beaucoup plus grandes que celles observ\u00e9es par les astronomes.<\/p><p>L\u2019\u00e9tude des variations du <sup>14<\/sup>C dans les archives marines permet de compl\u00e9ter la calibration du radiocarbone ainsi que de quantifier les variations du cycle du carbone en comparant les s\u00e9ries atmosph\u00e9riques et oc\u00e9aniques. En r\u00e9alisant des datations <sup>14<\/sup>C de coraux et de foraminif\u00e8res planctoniques, il est possible de reconstituer la variabilit\u00e9 de l&#8217;\u00e2ge <sup>14<\/sup>C du r\u00e9servoir marin de surface (ARM) qui est un traceur des \u00e9changes gazeux air-mer et du m\u00e9lange du carbone dans l\u2019oc\u00e9an (Skinner &amp; Bard 2022, Skinner et al. 2023). En outre, les \u00e2ges <sup>14<\/sup>C mesur\u00e9s sur les foraminif\u00e8res benthiques permettent d\u2019\u00e9valuer la circulation oc\u00e9anique profonde (Skinner &amp; Bard 2022, Skinner et al. 2023). Notre projet de recherche collaborative internationale (ANR MARCARA avec l\u2019Institut Alfred Wegener de Bremerhaven) est focalis\u00e9 sur l\u2019observation et la mod\u00e9lisation num\u00e9rique de l&#8217;ARM pour des sites cl\u00e9s des principaux oc\u00e9ans. Nous mesurons les \u00e2ges <sup>14<\/sup>C de micro-\u00e9chantillons gr\u00e2ce \u00e0 la source d&#8217;ions polyvalente d\u2019AixMICADAS, permettant notamment de dater des foraminif\u00e8res individuels (Fagault et al. 2019). Cela nous conduit \u00e0 mieux quantifier l&#8217;ARM en \u00e9vitant, ou en corrigeant, certains biais (Bard &amp; Heaton 2021). Notre projet est focalis\u00e9 sur la derni\u00e8re d\u00e9glaciation et les changements climatiques brusques tels que les \u00e9v\u00e9nements de Heinrich et de Dansgaard-Oeschger, dont le r\u00f4le sur le cycle du carbone est encore mal compris.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4decffff elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4decffff\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-17483ef\" data-id=\"17483ef\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-766ba56\" data-id=\"766ba56\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44592704 elementor-widget elementor-widget-heading\" data-id=\"44592704\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pollution atmosph\u00e9rique r\u00e9gionale<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7ea725 elementor-widget elementor-widget-text-editor\" data-id=\"a7ea725\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Le radiocarbone est le meilleur traceur pour distinguer et quantifier les produits issus de l\u2019utilisation des carbones fossiles des autres sources carbon\u00e9es telles que la combustion de biomasse et les \u00e9missions naturelles d\u2019origines biog\u00e8nes. La mesure directe du <sup>14<\/sup>C sur les particules fines de filtres d\u2019a\u00e9rosols atmosph\u00e9riques est r\u00e9alis\u00e9e \u00e0 l\u2019aide de l\u2019analyseur \u00e9l\u00e9mentaire coupl\u00e9 \u00e0 la source d&#8217;ions \u00e0 CO<sub>2<\/sub> gazeux d\u2019AixMICADAS qui permet d\u2019analyser des \u00e9chantillons de quelques microgrammes de carbone (Bard et al. 2015, Tuna et al. 2018). Cette technique a \u00e9t\u00e9 appliqu\u00e9e \u00e0 des a\u00e9rosols de la vall\u00e9e de Chamonix (Bonvalot et al. 2016) et de Fos-sur-Mer (Bonvalot et al. 2019). Nos \u00e9tudes ont d\u00e9montr\u00e9 l\u2019int\u00e9r\u00eat de la combinaison du <sup>14<\/sup>C avec d\u2019autres traceurs mol\u00e9culaires diagnostiques des sources pour quantifier le fort impact du br\u00fblage de la biomasse, notamment en hiver, et de le dissocier des autres contributions comme le trafic automobile ou les \u00e9missions biog\u00e9niques. Nous \u00e9tudions aussi les flux de particules et compos\u00e9s pyrog\u00e9niques vers la M\u00e9diterran\u00e9e (projet ANR FIRETRAC). La d\u00e9termination des origines des compos\u00e9s s\u00e9par\u00e9s par chromatographie liquide est r\u00e9alis\u00e9e gr\u00e2ce \u00e0 la mesure du <sup>14<\/sup>C de micro-\u00e9chantillons (Nouara et al. 2019).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-53c3e84d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"53c3e84d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-58b1549a\" data-id=\"58b1549a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1d1b7bb0\" data-id=\"1d1b7bb0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5b4ac625 elementor-widget elementor-widget-heading\" data-id=\"5b4ac625\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Datations en arch\u00e9ologie et en pr\u00e9histoire\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e52ecd8 elementor-widget elementor-widget-text-editor\" data-id=\"1e52ecd8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La datation de la cellulose du bois, optimis\u00e9e pour nos travaux sur la calibration du radiocarbone, permet de dater pr\u00e9cis\u00e9ment des sites arch\u00e9ologiques gr\u00e2ce \u00e0 la technique de wiggle-matching combinant le <sup>14<\/sup>C avec la dendrochronologie (projet ARKAIA Chrono-Ignis). Nos premi\u00e8res applications concernent des sites de l\u2019\u00c2ge du Bronze en Italie (Capano et al. 2020b) et de la p\u00e9riode sassanide en Iran (Djamali et al. 2022).<\/p><p>Pour les objets les plus rares et les plus pr\u00e9cieux de l&#8217;arch\u00e9ologie, notamment les restes humains, les outils et sculptures en os, la destruction des \u00e9chantillons n\u00e9cessaires \u00e0 la datation classique en spectrom\u00e9trie de masse par acc\u00e9l\u00e9rateur causerait des dommages irr\u00e9parables. La source d&#8217;ions \u00e0 CO<sub>2<\/sub> gazeux d\u2019AixMICADAS permet de s\u2019affranchir de cette contrainte gr\u00e2ce \u00e0 la tr\u00e8s petite taille des \u00e9chantillons (Tuna et al. 2018). Le d\u00e9veloppement de la datation de collag\u00e8ne purifi\u00e9 \u00e0 partir d\u2019ossement humains a \u00e9t\u00e9 men\u00e9 sous la forme d\u2019une collaboration avec l&#8217;Institut Max-Planck d&#8217;Anthropologie \u00e9volutionniste de Leipzig et la chaire de pal\u00e9oanthropologie du Coll\u00e8ge de France. La premi\u00e8re \u00e9tape a consist\u00e9 \u00e0 \u00e9tablir une m\u00e9thode optimale de synth\u00e8se du CO<sub>2<\/sub> \u00e0 partir du collag\u00e8ne au moyen d\u2019un analyseur \u00e9l\u00e9mentaire et d\u2019un pi\u00e8ge \u00e0 z\u00e9olite coupl\u00e9 \u00e0 la source d&#8217;ions d&#8217;AixMICADAS (Fewlass et al. 2018, 2019a). Cette m\u00e9thode a \u00e9t\u00e9 utilis\u00e9e pour dater des \u00e9chantillons de collag\u00e8ne purifi\u00e9 \u00e0 partir de fragments de restes humains provenant de sites c\u00e9l\u00e8bres comme la triple s\u00e9pulture humaine de Dolni Vestonice en R\u00e9publique tch\u00e8que (Fewlass et al. 2019b), la grotte di Pradis en Italie (Lugli et al. 2022) et la grotte de Bacho Kiro en Bulgarie (Fewlass et al. 2020) pour laquelle les m\u00eames ossements humains dat\u00e9s par <sup>14<\/sup>C ont fait l\u2019objet d\u2019analyses g\u00e9n\u00e9tiques et prot\u00e9omiques (Hublin et al. 2020).<\/p><p>Pour les \u00e9chantillons tr\u00e8s contamin\u00e9s par du carbone exog\u00e8ne, une m\u00e9thode plus performante consiste \u00e0 purifier et dater un des acides amin\u00e9s principaux du collag\u00e8ne. La s\u00e9paration de l\u2019hydroxyproline est en cours de d\u00e9veloppement dans l\u2019unit\u00e9 de g\u00e9ochimie organique.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7ca18d5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7ca18d5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9d46a86\" data-id=\"9d46a86\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3642ee0 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"3642ee0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d62f168 elementor-widget elementor-widget-heading\" data-id=\"d62f168\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">R\u00e9f\u00e9rences de l\u2019unit\u00e9 du radiocarbone\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f195a97 elementor-widget elementor-widget-text-editor\" data-id=\"f195a97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>2023<\/p><p>Heaton TJ, Butzin M, Bard E, Bronk Ramsey C, K\u00f6hler P, Hughen KA, Reimer PJ. Marine Radiocarbon calibration in polar regions: A simple approximate approach using Marine20. <em>Radiocarbon<\/em>, (2023).<\/p><p>Skinner L, Primeau F, Jeltsch-Th\u00f6mmes A, Joos F, K\u00f6hler P, Bard E. Rejuvenating the ocean: ventilation seesaws, CO<sub>2<\/sub> release, and radiocarbon budget closure across the last deglaciation. <em>Communications Earth &amp; Environment<\/em> (2023).<\/p><p>2022<\/p><p>Heaton TJ, Bard E, Bronk Ramsey C, Butzin M, Hatt\u00e9 C, Hughen KA, K\u00f6hler P, and Reimer PJ. A response to community questions on the Marine20 radiocarbon age calibration curve: Marine reservoir ages and the calibration of <sup>14<\/sup>C samples from the oceans. <em>Radiocarbon<\/em>, DOI:10.1017\/RDC.2022.66 (2022).<\/p><p>Lugli F, Nava A, Sorrentino R, Vazzana A, Bortolini E, Oxilia G, Silvestrini S, Nannini N, Bondioli L, Fewlass H, Talamo S, Bard E, Mancini L, M\u00fcller W, Romandini M, Benazzi S. Tracing the mobility of a Late Epigravettian (~\u200913 ka) male infant from Grotte di Pradis (Northeastern Italian Prealps) at high-temporal resolution. <em>Scientific Reports<\/em> 12, 8104, 1-13, +6 p. suppl. DOI\u00a0: 10.1038\/s41598-022-12193-6 (2022)<\/p><p>Schimmelpfennig I, Schaefer JM, Lamp J, Godard V, Schwartz R, Bard E, Tuna T, Ak\u00e7ar N, Schl\u00fcchter C, Zimmerman S, and ASTER Team: Glacier response to Holocene warmth inferred from in situ <sup>10<\/sup>Be and <sup>14<\/sup>C bedrock analyses in Steingletscher&#8217;s forefield (central Swiss Alps), <em>Climate of the Past<\/em> 18, 23-44, DOI: 10.5194\/cp-18-23-2022 (2022).<\/p><p>Skinner LC, Bard E. Radiocarbon as a dating tool and tracer in palaeoceanography. <em>Reviews of Geophysics<\/em> 60, 1, 1-64, e2020RG000720, DOI: 10.1029\/2020RG000720 (2022).<\/p><p>Djamali M, Capano M, Askari A, Faucherre N, Guibal F, Northedge A, Rashidian E, Tuna T, Bard E, An absolute radiocarbon chronology for the World Heritage site of Sarvestan (SW Iran); a late Sasanian heritage in early Islamic era. <em>Archaeometry<\/em> 64, 545-559, DOI: 10.1111\/arcm.12716 (2022).<\/p><p>2021<\/p><p>Bard E, Heaton TJ. On the tuning of plateaus in atmospheric and oceanic <sup>14<\/sup>C records to derive calendar chronologies of deep-sea cores and records of <sup>14<\/sup>C marine reservoir age changes. <em>Climate of the Past<\/em> 17, 1701-1725, DOI: 10.5194\/cp-17-1701-2021 (2021).<\/p><p>Heaton TJ, Bard E, Bronk Ramsey C, Butzin M, K\u00f6hler P, Muscheler R, Reimer PJ, Wacker L. Radiocarbon: a key tracer for studying the Earth\u2019s dynamo, climate system, carbon cycle and Sun. <em>Science<\/em> 374, 707, 1-11, eabd7096, DOI: 10.1126\/science.abd7096 (2021).<\/p><p>Young NE, Lesnek AJ, Cuzzone JK, Briner JP, Badgeley JA, Balter-Kennedy A, Graham BL, Cluett A, Lamp JL, Schwartz R, Tuna T, Bard E, Caffee MW, Zimmerman SRH, Schaefer JM. Cosmogenic isotope measurements from recently deglaciated bedrock as a new tool to decipher changes in Greenland Ice Sheet size. <em>Climate of the Past<\/em> 17, 419-450, DOI: 10.5194\/cp-17-419-2021 (2021).<\/p><p>2020<\/p><p>Bard E, Heaton TJ, Talamo S, Kromer B, Reimer RW, Reimer PJ. Extended dilation of the radiocarbon time scale between 40,000 and 48,000 years BP and the overlap between Neanderthals and Homo sapiens. <em>Proceedings of the National Academy of Sciences <\/em>117 (35), 21005-21007, +2 p. suppl., DOI: 10.1073\/pnas.2012307117 (2020).<\/p><p>Capano C, Martinelli N, Baioni M, Tuna T, Bernabei M, Bard E. Is the dating of short tree-ring series still a challenge? New evidence from the pile dwelling of Lucone di Polpenazze (northern Italy). <em>Journal of Archaeological Sciences<\/em> 121, 1-12, 105190, DOI:10.1016\/j.jas.2020.105190 (2020b).<\/p><p>Wacker L, Scott EM, Bayliss A, Brown D, Bard E, Bollhalder S, Friedrich M, Capano M, Cherkinsky A, Chivall D, Culleton BJ, Dee MW, Friedrich R, Hodgins GWL, Hogg A, Kennett DJ, Knowles TDJ, Kuitems M, Lange TE, Miyake F, Nadeau M-J, Nakamura T, Naysmith JP, Olsen J, Omori T, Petchey F, Philippsen B, Ramsey CB, Prasad GVR, Seiler M, Southon J, Staff R, Tuna T. Findings from an in-depth annual tree ring radiocarbon intercomparison. <em>Radiocarbon<\/em> 62 (4), 873-882, DOI: 10.1017\/RDC.2020.49 (2020).<\/p><p>Heaton TJ, K\u00f6hler P, Butzin M, Bard E, Reimer RW, Austin WEN, Bronk Ramsey C, Grootes PM, Hughen KA, Kromer B, Reimer PJ, Adkins JF, Burke A, Cook MS, Olsen J, Skinner LC. Marine20 &#8211; the marine radiocarbon age calibration curve (0-55,000 cal BP). <em>Radiocarbon <\/em>62 (4), 821-863, DOI: 10.1017\/RDC.2020.68 (2020).<\/p><p>Reimer PJ, Austin WEN, Bard E, Bayliss A, Blackwell PG, Bronk Ramsey C, Butzin M, Cheng H, Edwards RL, Friedrich M, Grootes PM, Guilderson TP, Hajdas I, Heaton TJ, Hogg AG, Hughen KA, Kromer B, Manning SW, Muscheler R, Palmer JG, Pearson C, Plicht Jvd, Reimer RW, Richards DA, Scott EM, Southon JR, Turney CSM, Wacker L, Adophi F, B\u00fcntgen U, Capano M, Fahrni S, Fogtmann-Schulz A, Friedrich R, K\u00f6hler P, Kudsk S, Miyake F, Olsen J, Reinig F, Sakamoto M, Sookdeo A, Talamo S. The IntCal20 Northern Hemisphere radiocarbon calibration curve (0-55 kcal BP). <em>Radiocarbon<\/em> 62 (4), 725-757, DOI: 10.1017\/RDC.2020.41 (2020).<\/p><p>Hublin JJ, Sirakov N, Aldeias V, Bailey S, Bard E, Delvigne V, Endarova E, Fagault Y, Fewlass H, Hajdinjak M, Kromer B, Krumov I, Marreiros J, Martisius N, Paskulin L, Sinet-Mathiot V, Meyer M, P\u00e4\u00e4bo S, Popov V, Rezek Z, Sirakova S, Skinner MM, Smith GM, Spasov R, Talamo S, Tuna T, Wacker L, Welker F, Wilcke A, Zahariev N, McPherron SP, Tsanova T. Initial Upper Palaeolithic Homo sapiens from Bacho Kiro Cave, Bulgaria. <em>Nature<\/em> 581, 299-302, + 13 p. suppl., DOI: 10.1038\/s41586-020-2259-z (2020).<\/p><p>Fewlass H, Talamo S, Wacker L, Kromer B, Tuna T, Fagault Y, Bard E, McPherron SP, Aldeias V, Maria R, Martisius NL, Paskulin L, Rezek Z, Sinet-Mathiot V, Sirakova S, Smith GM, Spasov R, Welker F, Sirakov N, Tsanova T, Hublin JJ. A <sup>14<\/sup>C chronology for Middle\u2013to\u2013Upper Palaeolithic transition at Bacho Kiro Cave, Bulgaria. <em>Nature Ecology &amp; Evolution<\/em> 4, 794-801, + 4 p. suppl., DOI: 10.1038\/s41559-020-1136-3 (2020).<\/p><p>Milesi VP, Debure M, Marty NCM, Capano M, J\u00e9z\u00e9quel D, Steefel C, Rouchon V, Alb\u00e9ric P, Bard E, Sarazin G, Guyot F, Virgone A, Gaucher EC, Ader M. Early Diagenesis of Lacustrine Carbonates in Volcanic Settings: The Role of Magmatic CO<sub>2<\/sub> (Lake Dziani Dzaha, Mayotte, Indian Ocean).<em> American Chemical Society Earth and Space Chemistry <\/em>4 (3), 363-378, DOI: 10.1021\/acsearthspacechem.9b00279 (2020).<\/p><p>Capano M, Miramont C, Shindo L, Guibal F, Marschal C, Kromer B, Tuna T, Bard E. Onset of the Younger Dryas recorded with <sup>14<\/sup>C at annual resolution in French subfossil trees. <em>Radiocarbon<\/em> 62 (4), 901-918, DOI: 10.1017\/RDC.2019.116 (2020a).<\/p><p>2019<\/p><p>Fewlass H, Talamo S, Kromer B, Bard E, Tuna T, Fagault Y, Sponheimer M, Ryder C, Hublin JJ, Perri A, S\u00e1zelov\u00e1 S, Svoboda J. Direct radiocarbon dates of mid Upper Palaeolithic human remains from Doln\u00ed V\u011bstonice II and Pavlov I, Czech Republic. <em>Journal of Archaeological Science<\/em> 27, 102000, 1-8, DOI: 10.1016\/j.jasrep.2019.102000 (2019b).<\/p><p>Lamp JL, Young NE, Koffman T, Schimmelpfennig I, Tuna T, Bard E, Schaefer JM. Update on the cosmogenic in situ <sup>14<\/sup>C laboratory at the Lamont-Doherty Earth Observatory. <em>Nuclear Instruments and Methods in Physics Research B <\/em>456, 157-162, DOI: 10.1016\/j.nimb.2019.05.064 (2019).<\/p><p>Bonvalot L, Tuna T, Fagault Y, Sylvestre A, Mesbah B, Wortham H, Jaffrezo JL, Marchand N, Bard E. Source apportionment of carbonaceous aerosols in the vicinity of a Mediterranean industrial harbor: A coupled approach based on radiocarbon and molecular tracers. <em>Atmospheric Environment<\/em> 212, 250-261, DOI: 10.1016\/j.atmosenv.2019.04.008 (2019).<\/p><p>Fewlass H, Tuna T, Fagault Y, Hublin JJ, Kromer B, Bard E, Talamo S. Pretreatment and gaseous radiocarbon dating of 40\u2013100\u2009mg archaeological bone, <em>Scientific Reports<\/em> 9, 5342, 1-11, + 4 p. suppl., DOI: 10.1038\/s41598-019-41557-8 (2019a).<\/p><p>Nouara A, Panagiotopoulos C, Balesdent J, Violakia K, Bard E, Fagault Y, Repeta DJ, Semp\u00e9r\u00e9 R. Liquid chromatographic isolation of individual carbohydrates from environmental matrices for stable carbon analysis and radiocarbon dating. <em>Analytica Chimica Acta<\/em> 1067, 137-146, DOI: 10.1016\/j.aca.2019.03.028 (2019).<\/p><p>Fagault Y, Tuna T, Rostek F, Bard E. Radiocarbon dating small carbonate samples with the gas ion source of AixMICADAS. <em>Nuclear Instruments and Methods in Physics Research B <\/em>455, 276-283, DOI: 10.1016\/j.nimb.2018.11.018 (2019).<\/p><p>2018<\/p><p>Tuna T, Fagault Y, Bonvalot L, Capano C, Bard E. Development of small CO<sub>2<\/sub> gas measurements with AixMICADAS. <em>Nuclear Instruments and Methods in Physics Research B<\/em> 437, 93-97, DOI: 10.1016\/j.nimb.2018.09.012 (2018).<\/p><p>Capano M, Miramont C, Guibal F, Kromer B, Tuna T, Fagault Y, Bard E. Wood <sup>14<\/sup>C dating with AixMICADAS: methods and application to tree-ring sequences from the Younger Dryas event in the southern French Alps. <em>Radiocarbon <\/em>60<em>, <\/em>51-74, DOI: 10.1017\/RDC.2017.83 (2018).<\/p><p>Fewlass H, Talamo S, Tuna T, Fagault Y, Kromer B, Hoffman H, Pangrazzi C, Hublin JJ, Bard E. Size matters: radiocarbon dates on microgram collagen samples back to the Palaeolithic with AixMICADAS and its gas ion source. <em>Radiocarbon<\/em>, 60 (2), 425-439, DOI: 10.1017\/RDC.2017.98 (2018).<\/p><p>2017<\/p><p>Sepulcre S, Durand N, Bard E. Large <sup>14<\/sup>C age offsets between the fine fraction and coexisting planktonic foraminifera in shallow Caribbean sediments. <em>Quaternary Geochronology<\/em> 38, 61-74, DOI: 10.1016\/j.quageo.2016.12.002 (2017).<\/p><p>2016<\/p><p>Bonvalot L, Tuna T, Fagault Y, Jaffrezo JL, Jacob V, Chevrier F, Bard E. Estimating contributions from biomass burning, fossil fuel combustion, and biogenic carbon to carbonaceous aerosols in the Valley of Chamonix: a dual approach based on radiocarbon and levoglucosan. <em>Atmospheric Chemistry and Physics <\/em>16, 1-20, DOI: 10.5194\/acp-16-13753-2016 (2016).<\/p><p>2015<\/p><p>Bard E, Tuna T, Fagault Y, Bonvalot L, Wacker L, Fahrni S, Synal H-A. AixMICADAS, the accelerator mass spectrometer dedicated to <sup>14<\/sup>C recently installed in Aix-en-Provence, France. <em>Nuclear Instruments and Methods in Physics Research B<\/em> 361, 80-86, DOI: 10.1016\/j.nimb.2015.01.075 (2015).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Calibration du radiocarbone et cycle du carbone global Dans sa forme originale, la datation radiocarbone n&#8217;est pas exacte car la teneur atmosph\u00e9rique en 14C ne reste pas constante au fil [&hellip;]<\/p>\n","protected":false},"author":551,"featured_media":13888,"parent":13902,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-13919","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-05-11 12:07:43","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/pages\/13919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/users\/551"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/comments?post=13919"}],"version-history":[{"count":5,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/pages\/13919\/revisions"}],"predecessor-version":[{"id":15286,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/pages\/13919\/revisions\/15286"}],"up":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/pages\/13902"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/media\/13888"}],"wp:attachment":[{"href":"https:\/\/www.cerege.fr\/fr\/wp-json\/wp\/v2\/media?parent=13919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}