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background_hover_color_opacity=\u00a0\u00bb1&Prime; column_backdrop_filter=\u00a0\u00bbnone\u00a0\u00bb column_shadow=\u00a0\u00bbnone\u00a0\u00bb column_border_radius=\u00a0\u00bbnone\u00a0\u00bb column_link_target=\u00a0\u00bb_self\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; width=\u00a0\u00bb2\/3&Prime; tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbsimple\u00a0\u00bb column_border_width=\u00a0\u00bbnone\u00a0\u00bb column_border_style=\u00a0\u00bbsolid\u00a0\u00bb column_padding_type=\u00a0\u00bbdefault\u00a0\u00bb gradient_type=\u00a0\u00bbdefault\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">DE L&rsquo;AIR FOSSILE DANS LA GLACE DES CALOTTES<\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div>\n<p>Les calottes de glace continentale se sont form\u00e9es par accumulation et tassement de la neige, au fil des ann\u00e9es. La glace ainsi form\u00e9e contient des bulles d\u2019air, mais aussi toutes sortes de poussi\u00e8res atmosph\u00e9riques (a\u00e9rosols). Une fois prisonnier des glaces, cet air conserve la composition qu\u2019il avait lors de son pi\u00e9geage. Aujourd\u2019hui, ces bulles, a\u00e9rosols et pollens \u201d fossiles \u201d sont de pr\u00e9cieux t\u00e9moins des climats pass\u00e9s.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=\u00a0\u00bbno-extra-padding\u00a0\u00bb column_padding_tablet=\u00a0\u00bbinherit\u00a0\u00bb column_padding_phone=\u00a0\u00bbinherit\u00a0\u00bb column_padding_position=\u00a0\u00bball\u00a0\u00bb column_element_direction_desktop=\u00a0\u00bbdefault\u00a0\u00bb column_element_spacing=\u00a0\u00bbdefault\u00a0\u00bb desktop_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb tablet_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb phone_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb background_color_opacity=\u00a0\u00bb1&Prime; background_hover_color_opacity=\u00a0\u00bb1&Prime; column_backdrop_filter=\u00a0\u00bbnone\u00a0\u00bb column_shadow=\u00a0\u00bbnone\u00a0\u00bb column_border_radius=\u00a0\u00bbnone\u00a0\u00bb column_link_target=\u00a0\u00bb_self\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; width=\u00a0\u00bb1\/3&Prime; tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbsimple\u00a0\u00bb column_border_width=\u00a0\u00bbnone\u00a0\u00bb column_border_style=\u00a0\u00bbsolid\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7469\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/16_sch_01-239x300.gif\" alt=\"\" width=\"239\" height=\"300\" \/>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=\u00a0\u00bbyes\u00a0\u00bb column_margin=\u00a0\u00bbcustom\u00a0\u00bb column_margin_custom=\u00a0\u00bb2px\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb bottom_padding=\u00a0\u00bb2%\u00a0\u00bb text_align=\u00a0\u00bbleft\u00a0\u00bb row_position=\u00a0\u00bbdefault\u00a0\u00bb row_position_tablet=\u00a0\u00bbinherit\u00a0\u00bb row_position_phone=\u00a0\u00bbinherit\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb pointer_events=\u00a0\u00bball\u00a0\u00bb][vc_column_inner column_padding=\u00a0\u00bbno-extra-padding\u00a0\u00bb column_padding_tablet=\u00a0\u00bbinherit\u00a0\u00bb column_padding_phone=\u00a0\u00bbinherit\u00a0\u00bb column_padding_position=\u00a0\u00bball\u00a0\u00bb column_element_direction_desktop=\u00a0\u00bbdefault\u00a0\u00bb column_element_spacing=\u00a0\u00bbdefault\u00a0\u00bb desktop_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb tablet_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb phone_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb background_color_opacity=\u00a0\u00bb1&Prime; background_hover_color_opacity=\u00a0\u00bb1&Prime; column_backdrop_filter=\u00a0\u00bbnone\u00a0\u00bb column_shadow=\u00a0\u00bbnone\u00a0\u00bb column_border_radius=\u00a0\u00bbnone\u00a0\u00bb column_link_target=\u00a0\u00bb_self\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; width=\u00a0\u00bb1\/1&Prime; tablet_width_inherit=\u00a0\u00bbdefault\u00a0\u00bb animation_type=\u00a0\u00bbdefault\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb border_type=\u00a0\u00bbsimple\u00a0\u00bb column_border_width=\u00a0\u00bbnone\u00a0\u00bb column_border_style=\u00a0\u00bbsolid\u00a0\u00bb column_padding_type=\u00a0\u00bbdefault\u00a0\u00bb gradient_type=\u00a0\u00bbdefault\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"qu-y-a-t-il-dans-l-atmosphere\" class=\"pt-header\">\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"etudier-la-banquise\" class=\"pt-header\">\n<div id=\"naviguer-dans-la-banquise\" class=\"pt-header\">\n<div id=\"jean-louis-etienne-et-les-glaciers\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">LES CAROTTES DE GLACE : DE FABULEUSES MACHINES \u00c0 REMONTER LE TEMPS<\/span><\/h3>\n<div id=\"les-carottes-de-glace-de-fabuleuses-machines-a-remonter-le-temps\" class=\"pt-header\">\n<p>Lorsque l\u2019on fore dans les calottes polaires, plus on descend, plus vieille est la glace. En analysant les \u00e9chantillons de plus en plus anciens, on remonte le temps ; on reconstitue ainsi, peu \u00e0 peu, l\u2019histoire climatique de notre plan\u00e8te. De nombreux r\u00e9sultats concernant cette histoire sont tir\u00e9s de l\u2019\u00e9tude de la calotte groenlandaise ; d\u2019autres proviennent des \u201d archives de glaces \u201d de l\u2019Antarctique.<\/p>\n<\/div>\n<div id=\"dans-les-glaces-du-groenland\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">DANS LES GLACES DUE GROENLAND<\/span><\/h3>\n<p>Dans la partie la plus \u00e9paisse de la calotte Groenlandaise, les glaciologues ont ainsi pu retirer et \u00e9tudier 3 050 m\u00e8tres de glace avant d\u2019atteindre le socle rocheux : cela recouvre les d\u00e9p\u00f4ts glaciaires des 2 500 derniers si\u00e8cles !<br \/>\nOn y retrouve archiv\u00e9es les fluctuations du climat : s\u00e9cheresses, catastrophes climatiques, r\u00e9chauffements, etc.<\/p>\n<\/div>\n<div id=\"nos-pollutions-aussi-sont-piegees-dans-la-glace\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">NOS POLLUTIONS AUSSI SONT PI\u00c9G\u00c9ES DANS LA GLACE<\/span><\/h3>\n<p>Les bulles d\u2019air pi\u00e9g\u00e9es dans la glace montrent que les quantit\u00e9s de CO2 et de m\u00e9thane ont augment\u00e9 tr\u00e8s nettement depuis deux si\u00e8cles. Ce qui correspond au d\u00e9but de l\u2019\u00e8re industrielle. Les glaces r\u00e9centes du Groenland renferment aussi beaucoup plus de polluants que celles de l\u2019Antarctique \u00e0 cause de la proximit\u00e9 des activit\u00e9s humaines de l\u2019h\u00e9misph\u00e8re Nord.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=\u00a0\u00bbin_container\u00a0\u00bb full_screen_row_position=\u00a0\u00bbmiddle\u00a0\u00bb column_margin=\u00a0\u00bbdefault\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb scene_position=\u00a0\u00bbcenter\u00a0\u00bb text_color=\u00a0\u00bbdark\u00a0\u00bb text_align=\u00a0\u00bbleft\u00a0\u00bb row_border_radius=\u00a0\u00bbnone\u00a0\u00bb row_border_radius_applies=\u00a0\u00bbbg\u00a0\u00bb overflow=\u00a0\u00bbvisible\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; gradient_direction=\u00a0\u00bbleft_to_right\u00a0\u00bb shape_divider_position=\u00a0\u00bbbottom\u00a0\u00bb bg_image_animation=\u00a0\u00bbnone\u00a0\u00bb][vc_column column_padding=\u00a0\u00bbno-extra-padding\u00a0\u00bb column_padding_tablet=\u00a0\u00bbinherit\u00a0\u00bb column_padding_phone=\u00a0\u00bbinherit\u00a0\u00bb column_padding_position=\u00a0\u00bball\u00a0\u00bb column_element_direction_desktop=\u00a0\u00bbdefault\u00a0\u00bb column_element_spacing=\u00a0\u00bbdefault\u00a0\u00bb desktop_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb tablet_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb phone_text_alignment=\u00a0\u00bbdefault\u00a0\u00bb background_color_opacity=\u00a0\u00bb1&Prime; 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