{"id":310,"date":"2011-05-03T23:00:00","date_gmt":"2011-05-03T22:00:00","guid":{"rendered":"http:\/\/www.laterredufutur.com\/wordpress\/?p=310"},"modified":"2011-05-03T23:00:00","modified_gmt":"2011-05-03T22:00:00","slug":"fukushima-radioactivite","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/fukushima-radioactivite\/","title":{"rendered":"Fukushima : Mais o\u00f9 se disperse la radioactivit\u00e9 ?"},"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 style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"306\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/des-traces-de-contamination-radioactive-dans-des-thons-rouges-du-pacifique\/japon-radioactivite\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?fit=120%2C90&amp;ssl=1\" data-orig-size=\"120,90\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"japon-radioactivite\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?fit=120%2C90&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?fit=120%2C90&amp;ssl=1\" class=\" alignleft size-full wp-image-306\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?resize=120%2C90\" border=\"0\" alt=\"radioactivit\u00e9 japonaise oc\u00e9anique\" align=\"left\" width=\"120\" height=\"90\" \/>Suite de la <a href=\"..\/html\/modules.php?name=News&amp;file=article&amp;sid=1231\" target=\"_blank\">catastrophe Japonaise de Fukushima,<\/a> une radioactivit\u00e9 sans pr\u00e9c\u00e9dent a touch\u00e9 les c\u00f4tes japonaises et l&rsquo;oc\u00e9an pacifique. Mais que devient cette pollution nucl\u00e9aire ? Est elle r\u00e9ellement dilu\u00e9e ? <\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">Une situation oc\u00e9anique complexe qui joue sur la dispersion. \u00ab\u00a0Pour ne rien arranger, la r\u00e9gion \u00e9tudi\u00e9e se situe \u00e0 la fronti\u00e8re entre 2 grands syst\u00e8mes oc\u00e9aniques\u00a0\u00bb rappelle la scientifique. Les eaux chaudes du Kuroshio, homologue pacifique du Gulf Stream, y c\u00f4toient des eaux plus froides. \u00ab\u00a0Les \u00e9carts de temp\u00e9rature, de l&rsquo;ordre de 12 \u00e0 15\u00b0C cr\u00e9ent de gros tourbillons, qui participent \u00e0 la dispersion des radio\u00e9l\u00e9ments vers le nord ou vers le sud\u00a0\u00bb souligne Claude Estournel&#8230;<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"> <\/span><\/span><\/span><\/p>\n<p>\u00a0<\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">Les images satellites des r\u00e9gions o\u00f9 la circulation oc\u00e9anique est particuli\u00e8rement intense permettent d&rsquo;anticiper \u00e0 plus long terme les trajectoires.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">A l&rsquo;heure actuelle, la contamination en mer est principalement localis\u00e9e le long des 50 km de c\u00f4te au nord et au sud de la centrale. Suivant la distance, les mesures s&rsquo;\u00e9chelonnent de quelques 10 000 Bq\/L \u00e0 100 Bq\/L. La dilution au large est, proportionnellement, 10 fois plus importante.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\">L&rsquo;IRSN et l&rsquo;IAEA, tous 2 int\u00e9ress\u00e9s par le mod\u00e8le du groupe SIROCCO, soulignent la n\u00e9cessit\u00e9 d&rsquo;\u00e9tudier l&rsquo;impact de la pollution radioactive sur les cha\u00eenes alimentaires.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"307\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/fukushima-radioactivite\/ocean-pacifique-kuroshio\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?fit=450%2C272&amp;ssl=1\" data-orig-size=\"450,272\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"ocean-pacifique-kuroshio\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?fit=300%2C181&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?fit=450%2C272&amp;ssl=1\" class=\" size-full wp-image-307\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?resize=450%2C272\" border=\"0\" alt=\"le courant oc\u00e9anique Kuroshio\" width=\"450\" height=\"272\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?w=450&amp;ssl=1 450w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/ocean-pacifique-kuroshio.jpg?resize=300%2C181&amp;ssl=1 300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\">Bulletin d&rsquo;analyse des courants dans les eaux du Pacifique Nord au 12 avril 2011 (en rouge le Kuroshio). Cr\u00e9dits : Mercator Oc\u00e9an.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\">Donc \u00e0 suivre le courant Kuroshio, la radioactivit\u00e9 devrait se diluer sur l&rsquo;est du pacifique et plonger dans les abisses de l&rsquo;oc\u00e9an. L&rsquo;impact sur la faune et la flore reste incontournable. A l&rsquo;heure actuelle, les discours rassurants des officiels sur cette radioactivit\u00e9 ne doivent pas nous faire oublier que les m\u00eames discours ont eu lieu en 1986 lors de la catastrophe de Tchernobyl. <\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\">Que vont devenir les milliers de tonnes d\u2019eau radioactive de Fukushima Dai-ichi d\u00e9vers\u00e9es dans l\u2019Oc\u00e9an Pacifique ? Evidemment il va y avoir dilution, mais le probl\u00e8me est la long\u00e9vit\u00e9 des radionucl\u00e9ides : il faut par exemple 300 ans au c\u00e9sium pour qu\u2019il perde sa radioactivit\u00e9 et des milliers d\u2019ann\u00e9es pour le plutonium.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"308\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/fukushima-radioactivite\/japon-radioactivite-courant\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?fit=299%2C220&amp;ssl=1\" data-orig-size=\"299,220\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"japon-radioactivite-courant\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?fit=299%2C220&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?fit=299%2C220&amp;ssl=1\" class=\" alignleft size-full wp-image-308\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?resize=299%2C220\" border=\"0\" alt=\"japon radioactivit\u00e9 courant marin\" align=\"left\" width=\"299\" height=\"220\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?w=299&amp;ssl=1 299w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant.jpg?resize=70%2C53&amp;ssl=1 70w\" sizes=\"auto, (max-width: 299px) 100vw, 299px\" \/><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/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> <script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script> <!-- TDF2 --> <ins class=\"adsbygoogle\"      style=\"display:inline-block;width:336px;height:280px\"      data-ad-client=\"ca-pub-2860849627502538\"      data-ad-slot=\"1340140919\"><\/ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); <\/script> <\/p>\n<p><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><span style=\"color: #101010;\"> <\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><br \/><span style=\"font-size: small;\"><span style=\"font-family: arial, helvetica, sans-serif;\">Une partie de ces \u00e9l\u00e9ments va se d\u00e9poser dans les fonds marins proche du Japon, une autre va \u00eatre comprise dans la chaine alimentaire pour se retrouver concentr\u00e9e dans la chair des plus gros pr\u00e9dateurs marins, une autre partie enfin va rester en suspension dans l\u2019eau et se d\u00e9placer avec les courants.<\/p>\n<p>Les deux courants principaux qui circulent au large de la c\u00f4te est du Japon sont le Kuroshio (chaud) et l&rsquo;Oyashio (froid). Ils forment, \u00e0 la hauteur du 40e parall\u00e8le, le courant du Pacifique Nord. Giratoire, celui-ci se dirige vers la Californie et revient ensuite vers les Philippines, puis le Japon. Ce p\u00e9riple dure de trois \u00e0 quatre ans.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><span style=\"font-size: small;\"><span style=\"font-family: arial, helvetica, sans-serif;\">Mais quand on voit la carte des courants marins du monde, on constate que les eaux et les courants se m\u00e9langent et finissent par visiter la terre enti\u00e8re.<\/p>\n<p>Enfin, sans attendre les courants, les animaux marins migrateurs acc\u00e9l\u00e9reront la dispersion mondiale sous-marine des radionucl\u00e9ides.<\/span><\/span><\/span><\/p>\n<p>\u00a0<\/p>\n<p style=\"text-align: justify;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"309\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/fukushima-radioactivite\/japon-radioactivite-courant1\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant1.jpg?fit=298%2C163&amp;ssl=1\" data-orig-size=\"298,163\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"japon-radioactivite-courant1\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant1.jpg?fit=298%2C163&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant1.jpg?fit=298%2C163&amp;ssl=1\" class=\" size-full wp-image-309\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/japon-radioactivite-courant1.jpg?resize=298%2C163\" border=\"0\" alt=\"courant marin monde\" width=\"298\" height=\"163\" \/><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #0a0a0a;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">Voici le rapport de L&rsquo;IRSN au 29 avril 2011 sur les \u00e9l\u00e9ments en mer :<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #0a0a0a;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">L\u2019eau de mer<br \/>Les mesures effectu\u00e9es pendant plusieurs jours dans l\u2019eau de mer \u00e0 proximit\u00e9 imm\u00e9diate de la centrale (quelques centaines de m\u00e8tres) ont montr\u00e9 une forte contamination du milieu marin, cons\u00e9quence de l\u2019\u00e9coulement vers la mer d\u2019une partie des eaux tr\u00e8s contamin\u00e9es pr\u00e9sentes dans les\u00a0 unit\u00e9s accident\u00e9es. L\u2019impact de ces rejets liquides a \u00e9t\u00e9 observ\u00e9 \u00e0 partir du 21 mars \u00e0 proximit\u00e9 de\u00a0 la centrale.\u00a0 <br \/>Les concentrations en radionucl\u00e9ides d\u00e9croissent lorsque l\u2019on s\u2019\u00e9loigne de la centrale de Fukushima Dai-Ichi. Elles sont environ 10 fois plus faibles \u00e0 15 km de la centrale et 100 \u00e0 500 fois plus faibles \u00e0 30 km.\u00a0 <br \/>A la distance de 30 km des c\u00f4tes pour les latitudes situ\u00e9es entre Dai-ichi et Dai-ini : <br \/>&#8211; En surface, les concentrations en c\u00e9sium 137 et en iode 131 ont augment\u00e9 apr\u00e8s le 30 mars pour\u00a0 atteindre respectivement 190 Bq\/L et 160 Bq\/L le\u00a0 15 avril, cons\u00e9quence de la progression vers le sud de la pollution radioactive ; <br \/>&#8211; En profondeur les concentrations mesur\u00e9es sont inf\u00e9rieures \u00e0 15 Bq\/L pour l\u2019iode 131 et 10 Bq\/L pour le c\u00e9sium 137 (3 valeurs sur 4 sont inf\u00e9rieures \u00e0 la limite de d\u00e9tection).<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #0a0a0a;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">Les poissons et les autres esp\u00e8ces marines<br \/>Pour m\u00e9moire, les niveaux maximaux admissibles fix\u00e9s par les autorit\u00e9s japonaises pour les produits\u00a0de la mer apr\u00e8s l\u2019accident de Fukushima sont 2000 Bq\/kg pour l\u2019iode 131 et de 500 Bq\/kg pour le c\u00e9sium 137. <br \/>L\u2019esp\u00e8ce de poisson qui pr\u00e9sente les niveaux de\u00a0 contamination les plus \u00e9lev\u00e9s est l\u2019anguille des sables ou lan\u00e7on japonais (Ammodytes personatus). Cette esp\u00e8ce est p\u00each\u00e9e localement et de fa\u00e7on saisonni\u00e8re (janvier \u00e0 avril). Les\u00a0 niveaux les plus \u00e9lev\u00e9s ont \u00e9t\u00e9 atteints le 13 avril chez des individus d\u00e9barqu\u00e9s au port d\u2019Iwaki dans la pr\u00e9fecture de Fukushima : 12000 Bq\/kg en iode 131, 6200 Bq\/kg en c\u00e9sium 134 et 6300 Bq\/kg en\u00a0 c\u00e9sium 137. Les pr\u00e9l\u00e8vements les plus r\u00e9cents disponibles (Iwaki) indiquent toujours une contamination consid\u00e9rable des lan\u00e7ons\u00a0 (3900Bq\/kg d\u2019iode-131 et 14400Bq\/kg de c\u00e9siums). <br \/>Les autres valeurs concernant les produits de\u00a0 la mer se situent g\u00e9n\u00e9ralement au-dessous de 200 Bq\/kg pour l\u2019iode 131, et de 100 Bq\/kg pour les deux isotopes du c\u00e9sium.<\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\">sources : <a href=\"http:\/\/www.techno-science.net\/\">http:\/\/www.techno-science.net\/<\/a> \/ <a href=\"http:\/\/fukushima.over-blog.fr\/\">http:\/\/fukushima.over-blog.fr\/<\/a> \/ <a href=\"http:\/\/www.irsn.fr\/\">http:\/\/www.irsn.fr\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"310\">(433)<\/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 style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"><img loading=\"lazy\" decoding=\"async\" class=\" alignleft size-full wp-image-306\" src=\"http:\/\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg\" border=\"0\" alt=\"radioactivit\u00e9 japonaise oc\u00e9anique\" align=\"left\" width=\"120\" height=\"90\" \/>Suite de la <a href=\"..\/html\/modules.php?name=News&amp;file=article&amp;sid=1231\" target=\"_blank\">catastrophe Japonaise de Fukushima,<\/a> une radioactivit\u00e9 sans pr\u00e9c\u00e9dent a touch\u00e9 les c\u00f4tes japonaises et l&rsquo;oc\u00e9an pacifique. Mais que devient cette pollution nucl\u00e9aire ? Est elle r\u00e9ellement dilu\u00e9e ? <\/span><\/span><\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\">Une situation oc\u00e9anique complexe qui joue sur la dispersion. \u00ab\u00a0Pour ne rien arranger, la r\u00e9gion \u00e9tudi\u00e9e se situe \u00e0 la fronti\u00e8re entre 2 grands syst\u00e8mes oc\u00e9aniques\u00a0\u00bb rappelle la scientifique. Les eaux chaudes du Kuroshio, homologue pacifique du Gulf Stream, y c\u00f4toient des eaux plus froides. \u00ab\u00a0Les \u00e9carts de temp\u00e9rature, de l&rsquo;ordre de 12 \u00e0 15\u00b0C cr\u00e9ent de gros tourbillons, qui participent \u00e0 la dispersion des radio\u00e9l\u00e9ments vers le nord ou vers le sud\u00a0\u00bb souligne Claude Estournel&#8230;<\/span><\/span><\/span><\/p>\n<p><span style=\"color: #101010;\"><span style=\"font-size: small;\"><span style=\"font-family: arial,helvetica,sans-serif;\"> <\/span><\/span><\/span><\/p>\n","protected":false},"author":1,"featured_media":306,"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_post_was_ever_published":false,"_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":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[28],"tags":[142,337,335,107,338,97,336,243,310],"class_list":["post-310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pollution","tag-courant","tag-courant-marin","tag-fukushima","tag-japon","tag-kuroshio","tag-nucleaire","tag-nucleide","tag-pacifique","tag-radioactivite","wpcat-28-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?fit=120%2C90&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-50","jetpack-related-posts":[{"id":12889,"url":"https:\/\/www.laterredufutur.com\/accueil\/fukushima-le-niveau-de-radioactivite-serait-en-forte-baisse-dans-locean-pacifique\/","url_meta":{"origin":310,"position":0},"title":"Fukushima : le niveau de radioactivit\u00e9 serait en forte baisse dans l&rsquo;oc\u00e9an pacifique ?","author":"Admin","date":"17 juillet 2016","format":false,"excerpt":"Selon une \u00e9tude internationale publi\u00e9e d\u00e9but juillet 2016, le niveau de radioactivit\u00e9 dans l'oc\u00e9an Pacifique a largement diminu\u00e9, cinq ans apr\u00e8s la catastrophe nucl\u00e9aire de Fukushima. Mais les zones les plus proches de la centrale restent encore tr\u00e8s contamin\u00e9es. Les niveaux de radioactivit\u00e9 \u00e0 travers l'oc\u00e9an Pacifique seraient en train\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":910,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-traces-de-contamination-radioactive-dans-des-thons-rouges-du-pacifique\/","url_meta":{"origin":310,"position":1},"title":"Des traces de contamination radioactive dans des thons rouges du Pacifique","author":"Admin","date":"29 mai 2012","format":false,"excerpt":"Suite de la catastrophe Japonaise de Fukushima, une radioactivit\u00e9 sans pr\u00e9c\u00e9dent a touch\u00e9 les c\u00f4tes japonaises et l'oc\u00e9an pacifique. Les mesures effectu\u00e9es pendant plusieurs jours dans l\u2019eau de mer \u00e0 proximit\u00e9 imm\u00e9diate de la centrale (quelques centaines de m\u00e8tres) ont montr\u00e9 une forte contamination du milieu marin. Voir Article Complet\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"radioactivit\u00e9 japonaise oc\u00e9anique","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2011\/05\/japon-radioactivite.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":701,"url":"https:\/\/www.laterredufutur.com\/accueil\/des-debris-emportes-par-le-tsunami-japonais-derivent-jusquen-amerique\/","url_meta":{"origin":310,"position":2},"title":"Des d\u00e9bris emport\u00e9s par le tsunami japonais d\u00e9rivent jusqu\u2019en Am\u00e9rique","author":"Admin","date":"12 janvier 2012","format":false,"excerpt":"Depuis le sinistre japonais de mars dernier, une seule peur obnubilait les esprits : la centrale nucl\u00e9aire de Fukushima hors de contr\u00f4le, faisant oublier les cons\u00e9quences de la catastrophe. Pourtant, des milliers de d\u00e9bris sont toujours \u00e0 la d\u00e9rive dans l\u2019Oc\u00e9an Pacifique.","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"debris japon","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/wordpress\/wp-content\/uploads\/2012\/01\/debris-tsunami-japon-1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":5732,"url":"https:\/\/www.laterredufutur.com\/accueil\/catastrophe-nucleaire-au-japon\/","url_meta":{"origin":310,"position":3},"title":"Catastrophe Nucl\u00e9aire au Japon","author":"Admin","date":"15 mars 2011","format":false,"excerpt":"Une explosion a endommag\u00e9 l'enceinte de confinement du r\u00e9acteur 2 de la centrale de Fukushima Mardi 15 mars 2011 : 8h38: Le risque nucl\u00e9aire est \"extr\u00eamement \u00e9lev\u00e9\" au Japon, a d\u00e9clar\u00e9 mardi le chef de la diplomatie fran\u00e7aise Alain Jupp\u00e9, apr\u00e8s une discussion avec son homologue nippon au sein du\u2026","rel":"","context":"Dans &quot;Ev\u00e8nement Brutal&quot;","block_context":{"text":"Ev\u00e8nement Brutal","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/evenement-brutal\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/04\/le-japon-menace-par-un-accident-nucleaire.jpeg?fit=480%2C329&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":19543,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-japon-sapprete-a-relacher-leau-contaminee-de-fukushima-dans-le-pacifique\/","url_meta":{"origin":310,"position":4},"title":"Le Japon s\u2019appr\u00eate \u00e0 rel\u00e2cher l\u2019eau contamin\u00e9e de Fukushima dans le Pacifique","author":"Admin","date":"11 septembre 2019","format":false,"excerpt":"Huit ans apr\u00e8s la catastrophe nucl\u00e9aire de Fukushima, le Japon projette de rejeter en mer plus d\u2019un million de tonnes d\u2019eau hautement radioactive stock\u00e9e dans la centrale. C\u2019est ce qu\u2019a r\u00e9v\u00e9l\u00e9 Greenpeace. Un de ses experts dans le domaine a publi\u00e9 une tribune dans le magazine The Economist, et le\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/07\/Tepco-Fukushima-Pacific-Ocean.jpg?fit=600%2C350&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/07\/Tepco-Fukushima-Pacific-Ocean.jpg?fit=600%2C350&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2017\/07\/Tepco-Fukushima-Pacific-Ocean.jpg?fit=600%2C350&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":1313,"url":"https:\/\/www.laterredufutur.com\/accueil\/fukushima-irradiation-a-flot-continu\/","url_meta":{"origin":310,"position":5},"title":"Fukushima, irradiation \u00e0 flot continu","author":"Admin","date":"19 mars 2013","format":false,"excerpt":"Deux ans apr\u00e8s la catastrophe, les fuites d\u2019eau contamin\u00e9e vers l\u2019oc\u00e9an semblent se poursuivre. Une prise in\u00e9dite et inqui\u00e9tante. La p\u00eache que vient de faire Tokyo Electric Power Co (Tepco) aux abords de la centrale de Fukushima Daichi alimente les craintes d\u2019une pollution nucl\u00e9aire persistante, au moment o\u00f9 le site\u2026","rel":"","context":"Dans &quot;Pollution&quot;","block_context":{"text":"Pollution","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/pollution\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2013\/03\/radiation.jpg?fit=300%2C243&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/310","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=310"}],"version-history":[{"count":0,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/310\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/306"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}