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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\u00bb5\/6&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]\n<h2><span style=\"color: #ff6b1a;\">L&rsquo;AUGMENTATION DE L&rsquo;EFFET DE SERRE<\/span><\/h2>\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; 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icon_linea=\u00a0\u00bbicon-basic-printer\u00a0\u00bb][\/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<h3><span style=\"color: #ff5b00;\">L&rsquo;EFFET DE SERRE : INDISPENSABLE \u00c0 LA VIE SUR TERRE<\/span><\/h3>\n<p>Comme les vitres d\u2019une serre, l\u2019atmosph\u00e8re retient \u00e0 la surface de la Terre une partie du rayonnement infrarouge (de la \u201cchaleur\u201d) qu\u2019elle \u00e9met, r\u00e9chauff\u00e9e par l\u2019\u00e9nergie solaire. Cet effet de serre est naturel : sans lui, notre plan\u00e8te serait un d\u00e9sert de glace (-18 \u00b0C) ! Certains gaz, m\u00eame en traces infimes, les poussi\u00e8res et les nuages contribuent \u00e0 accentuer \u2013 ou \u00e0 affaiblir \u2013 ce ph\u00e9nom\u00e8ne.<\/p>\n<h3><span style=\"color: #ff5b00;\">L&rsquo;ACTIVIT\u00c9 HUMAINE PERTURBE L&rsquo;\u00c9QUILIBRE<\/span><\/h3>\n<p>Industries, transports, agriculture modifient la composition de l\u2019atmosph\u00e8re. Les gaz rejet\u00e9s augmentent l\u2019effet de serre. Mais comment notre environnement, et en particulier le climat, r\u00e9agit ? On observe d\u00e9j\u00e0 quelques changements : mont\u00e9e du niveau marin, augmentation de la temp\u00e9rature moyenne, etc\u2026 Pour tenter de pr\u00e9voir les variations \u00e0 venir, des \u201cmod\u00e8les\u201d de plus en plus complexes sont test\u00e9s par de super-ordinateurs.[\/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\/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]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8741\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/02\/39_sch_03-262x300.gif\" alt=\"\" width=\"262\" height=\"300\" \/>[\/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\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][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<h3><span style=\"color: #ff5b00;\">LE CYCLE DU CARBONE<\/span><\/h3>\n<div>\n<div>\n<p>Chaque ann\u00e9e, la croissance et la d\u00e9composition des plantes rejettent et consomment autour de 200 milliards de tonnes de carbone ; les activit\u00e9s humaines, elles, en lib\u00e8rent 7 milliards. On sait que la v\u00e9g\u00e9tation terrestre et l\u2019oc\u00e9an en absorbent chacun environ un quart. La moiti\u00e9 restante semble donc s\u2019accumuler dans l\u2019atmosph\u00e8re\u2026 participant \u00e0 l\u2019augmentation de l\u2019effet de serre.<\/p>\n<\/div>\n<\/div>\n[\/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<h3><span style=\"color: #ff5b00;\">COMMENT R\u00c9AGIR ?<\/span><\/h3>\n<div>\n<div id=\"toutes-les-pollutions-convergent-vers-l-ocean\" class=\"grid pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div id=\"comment-reagir\" class=\"pt-header\">\n<p>L\u2019activit\u00e9 solaire et les \u00e9changes Terre-Oc\u00e9an-Atmosph\u00e8re sont les clefs du climat de notre plan\u00e8te. Les satellites effectuent des mesures \u00e0 l\u2019\u00e9chelle du globe (vents, temp\u00e9ratures, nuages, v\u00e9g\u00e9tation\u2026), mais de multiples ph\u00e9nom\u00e8nes interagissent, rendant l\u2019interpr\u00e9tation des r\u00e9sultats d\u00e9licate. R\u00e9duire nos rejets dans l\u2019atmosph\u00e8re permettrait incontestablement de limiter les d\u00e9r\u00e8glements. Faisons vite, car les \u201ccorrections\u201d prendront des ann\u00e9es !<\/p>\n<\/div>\n<div id=\"les-gaz-a-effet-de-serre-ges\" class=\"pt-header\">\n<h3><span style=\"color: #ff5b00;\">LES GAZ \u00c0 EFFET DE SERRE (GES)<\/span><\/h3>\n<p>L\u2019atmosph\u00e8re contient un certain nombre de gaz, en quantit\u00e9s infimes, dont les teneurs sont exprim\u00e9es en \u201cparties par millions\u201d (ppm). Ces gaz sont dits \u201c\u00e0 effet de serre\u201d car leurs mol\u00e9cules ont un pouvoir extr\u00eamement absorbant vis-\u00e0-vis de l\u2019\u00e9nergie traversant l\u2019atmosph\u00e8re. La vapeur d\u2019eau, le CO2, le m\u00e9thane (CH4), le protoxyde d\u2019azote sont les plus importants.<br \/>\nBien s\u00fbr, cet effet de serre est naturel et existe depuis l\u2019origine de notre plan\u00e8te. Cependant, nos activit\u00e9s humaines, par leurs rejets, en amplifient la puissance, soit en inoculant des GES artificiels jusqu\u2019alors inconnus dans l\u2019atmosph\u00e8re, soit en augmentant de fa\u00e7on consid\u00e9rable les concentrations naturelles.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/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\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<h3><span style=\"color: #ff5b00;\">NOS REJETS DE CARBONE<\/span><\/h3>\n<div>\n<div id=\"toutes-les-pollutions-convergent-vers-l-ocean\" class=\"grid pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div>\n<p>M\u00eame si le CO2 n\u2019est pas \u2013 loin de l\u00e0 \u2013 le seul gaz responsable de l\u2019effet de serre, il \u00e9quivaut \u00e0 tous les autres r\u00e9unis.<br \/>\nAvant l\u2019\u00e8re industrielle, l\u2019atmosph\u00e8re renfermait quelque 280 ppm de CO2. Actuellement, on en mesure 370, soit la quantit\u00e9 la plus importante depuis\u2026 400 000 ans si l\u2019on en croit les \u201carchives climatiques\u201d conserv\u00e9es dans les glaces des calottes polaires !\u2026 Et l\u2019on parle de 540 \u00e0 970 ppm de CO2 possibles en 2100 !<br \/>\nCette augmentation sans pr\u00e9c\u00e9dent est exclusivement due aux rejets de l\u2019homme.<br \/>\nLes cons\u00e9quences sur le climat terrestre ne font plus de doute\u2026<\/p>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"reseaux-alimentaires-et-concentrations-toxiques\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-4\"><\/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-8742\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/02\/39_sch_04-234x300.gif\" alt=\"\" width=\"234\" 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][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<h3><span style=\"color: #ff5b00;\">ET POUR LE M\u00c9THANE<\/span><\/h3>\n<div>\n<p>Aujourd\u2019hui, la concentration en m\u00e9thane atteint 1,8 ppm (contre 0,7 \u00e0 l\u2019\u00e9poque de Charlemagne), soit un total de 5 Gt (Milliards de tonnes) dans l\u2019atmosph\u00e8re : en augmentation de pr\u00e8s de 1% par an, 3 fois plus que pour le CO2 !<br \/>\nCe m\u00e9thane est \u00e9mis lors de la d\u00e9composition de la mati\u00e8re organique ; les sources sont essentiellement les zones humides, les rizi\u00e8res, mais aussi les d\u00e9charges d\u2019ordures, les bovins (digestion), etc.<br \/>\nChaque mol\u00e9cule de m\u00e9thane a un pouvoir r\u00e9chauffant 21 fois plus important qu\u2019une mol\u00e9cule de CO2.<\/p>\n<\/div>\n[\/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\/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]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-8743\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/02\/39_sch_02-214x300.gif\" alt=\"\" width=\"214\" height=\"300\" \/>[\/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\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][vc_column_text css=\u00a0\u00bb\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<h3><span style=\"color: #ff5b00;\">LA DUR\u00c9E DE VIE DES COUPABLES<\/span><\/h3>\n<div>\n<div>\n<p>L\u2019importance des GES d\u00e9pend non seulement de leurs teneurs instantan\u00e9es, mais aussi du temps de r\u00e9sidence de chacun d\u2019eux dans l\u2019atmosph\u00e8re. Le temps n\u00e9cessaire \u00e0 la disparition de la moiti\u00e9 de la quantit\u00e9 pr\u00e9sente d\u2019un gaz donn\u00e9 est appel\u00e9 \u201cdur\u00e9e de vie\u201d de ce gaz. S\u2019il faut une douzaine d\u2019ann\u00e9es pour que la moiti\u00e9 du m\u00e9thane disparaisse, la dur\u00e9e de vie du CO2 atteint un si\u00e8cle, contre quelques jours seulement pour la vapeur d\u2019eau ; un autre GES, le CF4 (t\u00e9trafluorom\u00e9thane), poss\u00e8de une dur\u00e9e de vie de 50 000 ans ! Voil\u00e0 pourquoi, m\u00eame en cas d\u2019arr\u00eat d\u2019\u00e9mission imm\u00e9diat, les effets des GES mettront des d\u00e9cennies \u00e0 s\u2019estomper\u2026<\/p>\n<\/div>\n<\/div>\n[\/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\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<h3><span style=\"color: #ff5b00;\">O\u00d9 VA LE CARBONE ?<\/span><\/h3>\n<div>\n<div>\n<p>On estime que l\u2019atmosph\u00e8re contient 750 Gt (milliards de tonnes) de carbone, contre 39 000 Gt conserv\u00e9es dans l\u2019oc\u00e9an (dont 1000 en surface) et environ 2200 Gt dans les sols et la v\u00e9g\u00e9tation. Entre ces immenses r\u00e9servoirs, les \u00e9changes sont aussi colossaux : 60 Gt vont de la v\u00e9g\u00e9tation \u00e0 l\u2019atmosph\u00e8re et vice-versa chaque ann\u00e9e (photosynth\u00e8se, respiration\u2026) et 90 Gt circulent entre ciel et oc\u00e9an.<br \/>\nCes quantit\u00e9s sont gigantesques face \u00e0 nos rejets humains : 5,5 Gt de carbone sont \u00e9mises en br\u00fblant les \u00e9nergies fossiles (p\u00e9trole, charbon\u2026) et 1,6 par alt\u00e9ration des sols (br\u00fblis\u2026).<br \/>\nQue devient ce surplus de carbone d\u2019origine anthropique ? La plan\u00e8te peut-elle l\u2019absorber ? Pas compl\u00e8tement : elle semble satur\u00e9e. En effet, m\u00eame si la moiti\u00e9 est effectivement absorb\u00e9e par l\u2019oc\u00e9an et la v\u00e9g\u00e9tation terrestre (\u00e0 \u00e9galit\u00e9), le reste \u2013 3 \u00e0 4 Gt \u2013 demeurent dans l\u2019atmosph\u00e8re.<br \/>\nLa nature n\u2019est pas un \u201cpuits\u201d de carbone suffisamment efficace pour faire dispara\u00eetre nos exc\u00e8s. Et c\u2019est cet apport artificiel qui augmente l\u2019effet de serre, d\u00e9r\u00e9glant le chauffage de la plan\u00e8te.<br \/>\nLes cons\u00e9quences commencent \u00e0 se faire sentir (temp\u00e9ratures, niveau de la mer, fonte des glaciers\u2026) et, malgr\u00e9 les incertitudes, les experts concluent, \u00e0 la quasi-unanimit\u00e9, \u00e0 une r\u00e9elle menace pour l\u2019avenir.<br \/>\nComment imaginer que puisse dispara\u00eetre notre exc\u00e8s de carbone<\/p>\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-8744\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/02\/39_sch_01-300x250.gif\" alt=\"\" width=\"300\" height=\"250\" \/>[\/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<h3><span style=\"color: #ff5b00;\">FOR\u00caTS ET CULTURES<\/span><\/h3>\n<div>\n<div id=\"forets-et-cultures\" class=\"pt-header\">\n<p>Les for\u00eats sont, au premier abord, un \u201cpuits\u201d pour le carbone atmosph\u00e9rique, absorbant le CO2 par photosynth\u00e8se. Du moins, en p\u00e9riode de croissance et d\u2019extension (augmentation de la biomasse); car \u00e0 maturit\u00e9, incendies et pourrissement rejettent dans l\u2019air ambiant le carbone emmagasin\u00e9 par la vie v\u00e9g\u00e9tale ! En revanche, un arbre utilis\u00e9 pour la construction ne restitue pas de carbone \u00e0 l\u2019atmosph\u00e8re (tant qu\u2019il ne br\u00fble pas, ni ne pourrit\u2026).<br \/>\nPuisque la croissance des arbres et les sols pompent une partie du carbone atmosph\u00e9rique, certains pensent que notre exc\u00e9dent pourrait \u00eatre absorb\u00e9 en replantant les for\u00eats. Mais attention : le carbone stock\u00e9 ressurgira un jour, et pour conserver \u201cl\u2019aspirateur \u00e0 carbone\u201d en \u00e9tat, il faudra r\u00e9guler les surfaces foresti\u00e8res et les essences (rapidit\u00e9 de croissance, l\u2019utilisation du bois, etc.).<br \/>\nQuant aux cultures, m\u00eame si elles absorbent un peu de carbone, elles produisent indirectement m\u00e9thane et protoxyde d\u2019azote\u2026 autres puissants gaz \u00e0 effet de serre !<\/p>\n<\/div>\n<div id=\"le-long-voyage-oceanique\" class=\"pt-header\">\n<h3><span style=\"color: #ff5b00;\">LE LONG VOYAGE OC\u00c9ANIQUE<\/span><\/h3>\n<p>L\u2019Oc\u00e9an contient 60 fois plus de carbone que l\u2019atmosph\u00e8re, sous diff\u00e9rentes formes (dissolution dans l\u2019eau, mati\u00e8res organiques, min\u00e9rales, etc.). Cet immense r\u00e9servoir naturel pompe le carbone de deux mani\u00e8res.<br \/>\nD\u2019abord, par un ph\u00e9nom\u00e8ne purement physico-chimique : l\u2019eau de mer peut contenir du gaz carbonique dissous, en quantit\u00e9 d\u2019autant plus grande que la temp\u00e9rature est basse : les mers polaires sont donc des \u201cpuits de carbone\u201d tr\u00e8s efficaces. Une fois prisonnier des masses d\u2019eau, ce carbone est entra\u00een\u00e9 tout au long du \u201ctapis roulant\u201d que forme la circulation oc\u00e9anique mondiale profonde ; il r\u00e9appara\u00eetra en surface pr\u00e8s de 1000 ans plus tard, \u00e0 des milliers de kilom\u00e8tres des r\u00e9gions o\u00f9 il a \u00e9t\u00e9 pi\u00e9g\u00e9 ! Une partie sera rest\u00e9e dans les s\u00e9diments, entra\u00een\u00e9e par le cycle de la vie.<br \/>\nCar la vie oc\u00e9anique, elle aussi, pompe le carbone : par photosynth\u00e8se lors des pouss\u00e9es de phytoplancton, mais aussi par la formation de coquilles et la chute vers les fonds des d\u00e9chets organiques.<br \/>\nPourrait-on am\u00e9liorer le rendement de la double pompe oc\u00e9anique ? Attention de ne pas jouer les apprentis sorciers\u2026<\/p>\n<\/div>\n<div id=\"nous-devons-faire-un-effort\" class=\"pt-header\">\n<h3><span style=\"color: #ff5b00;\">NOUS DEVONS TOUS FAIRE UN EFFORT !<\/span><\/h3>\n<p>Puisque la nature ne semble pas pouvoir absorber notre surplus de carbone annuel, il faudrait r\u00e9duire de pr\u00e8s de moiti\u00e9 nos \u00e9missions pour rester en dessous de la quantit\u00e9 que la Terre peut recycler (3 \u00e0 4 Gt). Ce qui est tr\u00e8s loin d\u2019\u00eatre le cas ! En effet, 5 % seulement de r\u00e9duction ont \u00e9t\u00e9 propos\u00e9s lors de la conf\u00e9rence de Kyoto ! Et comme le CO2 persiste pr\u00e8s de 2 si\u00e8cles dans l\u2019atmosph\u00e8re, on voit \u00e0 quel point les effets de nos rejets actuels auront, \u00e0 priori, du mal \u00e0 dispara\u00eetre\u2026<\/p>\n<\/div>\n<div id=\"pour-aller-plus-loin\" class=\"pt-header\">\n<h3><span style=\"color: #ff5b00;\">POUR ALLER PLUS LOIN&#8230;<\/span><\/h3>\n<p><span style=\"color: #ff5b00;\">BIBLIOGRAPHIE<\/span><\/p>\n<ul>\n<li>Changement climatique 2001: impact, adaptation et vuln\u00e9rabilit\u00e9 \u2013 GIEC\/IPCC, janvier 2001<\/li>\n<li>Les d\u00e9rives du climat : Dossiers &amp; Documents \u2013 Le Monde Nov. 2001<\/li>\n<li>Quel climat pour demain ? S. Huet, Calmann-L\u00e9vy, 2000<\/li>\n<li>Enqu\u00eate sur le climat pass\u00e9, enqu\u00eate sur le climat du futur, Revue du Palais de la D\u00e9couverte, mars-avril 2001<\/li>\n<li>L\u2019effet de serre \u2013 La Jaune et la Rouge, mai 2000 (Conf\u00e9rences-d\u00e9bats, X-Environnement) Changement climatique : un d\u00e9fi majeur (Ademe, d\u00e9c. 2000)<\/li>\n<\/ul>\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; 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