{"id":8960,"date":"2026-03-09T00:15:39","date_gmt":"2026-03-08T23:15:39","guid":{"rendered":"https:\/\/www.polarpod.fr\/?page_id=8960"},"modified":"2026-03-09T00:16:32","modified_gmt":"2026-03-08T23:16:32","slug":"bio-optique-couleur-de-locean-et-phytoplancton","status":"publish","type":"page","link":"https:\/\/www.polarpod.fr\/fr\/polar-pod\/bio-optique-couleur-de-locean-et-phytoplancton\/","title":{"rendered":"Bio-optique, couleur de l&rsquo;oc\u00e9an et phytoplancton"},"content":{"rendered":"[vc_row type=\u00a0\u00bbfull_width_background\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 bg_color=\u00a0\u00bb#454156&Prime; scene_position=\u00a0\u00bbcenter\u00a0\u00bb top_padding=\u00a0\u00bb4%\u00a0\u00bb bottom_padding=\u00a0\u00bb0%\u00a0\u00bb text_color=\u00a0\u00bblight\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 id=\u00a0\u00bbintro\u00a0\u00bb row_name=\u00a0\u00bbIntro\u00a0\u00bb color_overlay=\u00a0\u00bb#0a0a0a\u00a0\u00bb color_overlay_2=\u00a0\u00bb#C02020&Prime; 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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 column_position=\u00a0\u00bbdefault\u00a0\u00bb advanced_gradient_angle=\u00a0\u00bb0&Prime; 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 gradient_type=\u00a0\u00bbdefault\u00a0\u00bb column_padding_type=\u00a0\u00bbdefault\u00a0\u00bb][vc_column_text css=\u00a0\u00bb\u00a0\u00bb max_width=\u00a0\u00bb700&Prime; text_direction=\u00a0\u00bbdefault\u00a0\u00bb]\n<h1 class=\"home_intro_title\" style=\"text-align: left;\"><span class=\"text-primary\" style=\"color: #ff5b00;\">Bio-optique, couleur de l&rsquo;oc\u00e9an et phytoplancton<\/span><\/h1>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=\u00a0\u00bbfull_width_background\u00a0\u00bb full_screen_row_position=\u00a0\u00bbmiddle\u00a0\u00bb column_margin=\u00a0\u00bb30px\u00a0\u00bb column_direction=\u00a0\u00bbdefault\u00a0\u00bb column_direction_tablet=\u00a0\u00bbdefault\u00a0\u00bb column_direction_phone=\u00a0\u00bbdefault\u00a0\u00bb bg_color=\u00a0\u00bb#ffffff\u00a0\u00bb scene_position=\u00a0\u00bbcenter\u00a0\u00bb top_padding=\u00a0\u00bb4%\u00a0\u00bb bottom_padding=\u00a0\u00bb4%\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 id=\u00a0\u00bbATMOSPHERE\u00a0\u00bb row_name=\u00a0\u00bbSeul sur la banquise\u00a0\u00bb overlay_strength=\u00a0\u00bb0.3&Prime; 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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 enable_animation=\u00a0\u00bbtrue\u00a0\u00bb animation=\u00a0\u00bbfade-in\u00a0\u00bb animation_easing=\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.vc_custom_1773011584290{padding-bottom: 10px !important;}\u00a0\u00bb text_direction=\u00a0\u00bbdefault\u00a0\u00bb]<img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-8961\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-300x300.png\" alt=\"\" width=\"400\" height=\"400\" srcset=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-300x300.png 300w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-150x150.png 150w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-768x768.png 768w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-140x140.png 140w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-100x100.png 100w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-500x500.png 500w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-350x350.png 350w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire-800x800.png 800w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/validation_satellitaire.png 1000w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>Vu depuis l\u2019espace, la couleur de l\u2019oc\u00e9an raconte une histoire essentielle : celle du phytoplancton, ces micro-algues qui forment la base de toute la vie marine et jouent un r\u00f4le majeur dans le climat en captant du CO\u2082. Les satellites permettent d\u00e9j\u00e0 de suivre \u00e0 grande \u00e9chelle la r\u00e9partition de ce phytoplancton gr\u00e2ce \u00e0 la \u00ab radiom\u00e9trie couleur de l\u2019oc\u00e9an \u00bb. Mais dans l\u2019oc\u00e9an Austral, ces observations restent approximatives, parfois fauss\u00e9es d\u2019un facteur deux \u00e0 trois, faute de donn\u00e9es locales de r\u00e9f\u00e9rence.<\/p>\n<p>Le Polar POD va changer la donne. En d\u00e9rivant pendant trois ans dans le courant circumpolaire antarctique, il mesurera en continu les propri\u00e9t\u00e9s optiques de l\u2019eau (l\u2019absorption et la diffusion de la lumi\u00e8re, les signatures spectrales du phytoplancton, etc.).<span class=\"Apple-converted-space\">\u00a0<\/span><\/p>\n<p>Ces donn\u00e9es permettront :<\/p>\n<p>D\u2019am\u00e9liorer la pr\u00e9cision des satellites en validant leurs mesures sur le terrain, notamment pour le programme PACE de la NASA et les missions europ\u00e9ennes.<\/p>\n<p>De mieux comprendre la \u00ab signature optique \u00bb particuli\u00e8re de l\u2019oc\u00e9an Austral, diff\u00e9rente du reste du globe \u00e0 cause de la composition sp\u00e9cifique du phytoplancton et de la mati\u00e8re organique dissoute.<\/p>\n<p>D\u2019identifier les types fonctionnels de phytoplancton (comme les diatom\u00e9es ou les coccolithophores), chacun jouant un r\u00f4le diff\u00e9rent dans le cycle du carbone et dans les cha\u00eenes alimentaires.<\/p>\n<p>De suivre l\u2019\u00e9volution du phytoplancton au fil des saisons et des ann\u00e9es, afin de d\u00e9tecter d\u2019\u00e9ventuelles tendances li\u00e9es au changement climatique.<\/p>\n<p>Ces recherches nous permettront de r\u00e9pondre \u00e0 une question cruciale : comment la vie microscopique qui colore l\u2019oc\u00e9an Austral r\u00e9agit-elle aux bouleversements en cours, et quelles cons\u00e9quences cela a-t-il pour le climat et la biodiversit\u00e9 mondiale ?[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner 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 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 css=\u00a0\u00bb.vc_custom_1758189586257{border-color: #FFFFFF00 !important;}\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; 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