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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;\">LE CLIMAT ANTARCTIQUE<\/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\/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-9355\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT01-300x98.png\" alt=\"\" width=\"300\" height=\"98\" srcset=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT01-300x98.png 300w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT01.png 399w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>[\/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<div>\n<p>Sur sa route, le Polar POD va rencontrer la ceinture des vents d&rsquo;ouest des Quaranti\u00e8mes Rugissants et des Cinquanti\u00e8mes Hurlants, puis, pr\u00e8s du continent, les d\u00e9pressions circum-antarctiques avec, par moments, de grandes bouff\u00e9es d\u2019air glac\u00e9es qui descendent de la calotte ; et malgr\u00e9 la pr\u00e9sence ti\u00e9dissante de l&rsquo;oc\u00e9an, la temp\u00e9rature de l&rsquo;air chutera nettement en dessous de 0 \u00b0C. \u00c0 No\u00ebl, au-del\u00e0 du cercle polaire, l&rsquo;\u00e9quipage vivra dans un jour continu.<\/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\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<h2><span style=\"color: #ff6b1a;\">CE QU&rsquo;IL FAUT SAVOIR :<\/span><\/h2>\n<p><strong>Pourquoi fait-il si froid en Antarctique ?<\/strong> Outre l&rsquo;inclinaison de l&rsquo;axe de rotation de la Terre qui limite l&rsquo;ensoleillement des deux r\u00e9gions polaires par rapport \u00e0 l\u2019\u00e9quateur, plus de 80% de l&rsquo;\u00e9nergie solaire estivale qui atteint la glace antarctique est renvoy\u00e9e vers l&rsquo;espace, contre 35% sur les continents et 15% sur l&rsquo;oc\u00e9an. C\u2019est ce que l\u2019on appelle l\u2019alb\u00e9do. Et en hiver, la banquise double encore cette surface blanche r\u00e9fl\u00e9chissante. De plus, la neige rayonne de l&rsquo;\u00e9nergie sous forme d&rsquo;infra-rouge (rayonnement li\u00e9 \u00e0 la temp\u00e9rature d\u2019un corps). Au total, l&rsquo;immense Antarctique perd plus de chaleur qu&rsquo;il n&rsquo;en re\u00e7oit : c&rsquo;est un v\u00e9ritable \u00ab puits de froid \u00bb. Ce manque est compens\u00e9 par l&rsquo;oc\u00e9an environnant et par l&rsquo;air venu des r\u00e9gions temp\u00e9r\u00e9es.<\/p>\n<p><strong>\u00c9l\u00e9ment fondamental des \u00e9changes oc\u00e9an-glace-atmosph\u00e8re,<\/strong> l&rsquo;Antarctique est un des moteurs du climat. Dans le fonctionnement global de la \u00ab machine atmosph\u00e9rique \u00bb, l&rsquo;air chaud et humide qui s&rsquo;\u00e9l\u00e8ve au-dessus des r\u00e9gions \u00e9quatoriales retombe, froid et sec, au niveau des p\u00f4les. Ce brassage, d\u00e9vi\u00e9 par la rotation terrestre (force de Coriolis) et la distribution particuli\u00e8re des terres dans l&rsquo;h\u00e9misph\u00e8re Sud, cr\u00e9e la ceinture des hautes pressions oc\u00e9aniques australes et une \u00ab auge barom\u00e9trique \u00bb d\u00e9pressionnaire stable (en d\u2019autres mots une zone de faible pression) \u00e0 la p\u00e9riph\u00e9rie du continent. Pendant la longue nuit hivernale, l&rsquo;air de l\u2019Antarctique est isol\u00e9 de la circulation g\u00e9n\u00e9rale au centre d\u2019un gigantesque man\u00e8ge de circulation atmosph\u00e9rique. C\u2019est ce que l\u2019on appelle le vortex antarctique.<\/p>\n<p>De m\u00eame, l\u2019Antarctique comme l\u2019Arctique<strong> sont des r\u00e9gions responsables de la formation d\u2019eau de fond<\/strong>, de l\u2019eau dense et donc \u00ab\u00a0lourde\u00a0\u00bb qui se charge en sel pr\u00e8s des zones de cr\u00e9ation de banquise. Cette eau plonge ensuite dans l\u2019oc\u00e9an et alimente le moteur du grand tapis roulant que l\u2019on appelle \u00ab\u00a0la circulation thermohaline\u00a0\u00bb. Le bon fonctionnement de cette circulation assure les \u00e9changes de chaleur et de sel dans l\u2019oc\u00e9an mondial et donc une grande partie de notre climat r\u00e9gional. La plong\u00e9e des eaux en Arctique est notamment un moteur du \u00ab\u00a0Gulf Stream\u00a0\u00bb donnant un climat plus chaud et cl\u00e9ment \u00e0 la latitude de Bordeaux en France, compar\u00e9e \u00e0 celle de Montr\u00e9al.[\/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-9358\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT04-300x134.png\" alt=\"\" width=\"300\" height=\"134\" srcset=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT04-300x134.png 300w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT04.png 700w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>[\/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-full wp-image-9356\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT02.png\" alt=\"\" width=\"209\" height=\"152\" \/>[\/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<div>\n<p>D&rsquo;extraordinaires \u00ab vall\u00e9es s\u00e8ches \u00bb ont \u00e9t\u00e9 d\u00e9couvertes dans les montagnes de la Terre Victoria et vers la c\u00f4te est. L\u00e0, des glaciers ne parviennent pas jusqu&rsquo;\u00e0 la mer, mais convergent vers les cuvettes balay\u00e9es par les vents tr\u00e8s secs qui descendent du plateau et \u00e9vaporent neige et glace, momifiant pour des mill\u00e9naires le corps des animaux \u00e9gar\u00e9s et mettant \u00e0 nu la roche : une aubaine pour les g\u00e9ologues et les biologistes ! Au fond d&rsquo;\u00e9tranges lacs sal\u00e9s, l&rsquo;eau atteint 25\u00b0C gr\u00e2ce au jeu de la lumi\u00e8re \u00e0 travers la glace superficielle. Sans la moindre gout\u00adte de pluie depuis 2 millions d&rsquo;ann\u00e9es, ces vall\u00e9es ont servi de mod\u00e8le \u00e0 la NASA pour imaginer le climat sur Mars.<\/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\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]<strong>Le vent, le froid et la s\u00e9cheresse caract\u00e9risent le climat antarctique.<\/strong> Amen\u00e9es sur la c\u00f4te par les d\u00e9pressions oc\u00e9aniques, les pr\u00e9cipitations diminuent rapidement vers l&rsquo;int\u00e9rieur : de 900 mm d&rsquo;eau (90 g\/cm2 de neige) tomb\u00e9s par an \u00e0 l&rsquo;extr\u00e9mit\u00e9 de la P\u00e9ninsule, la quantit\u00e9 chute \u00e0 30 mm \u00e0 peine, au c\u0153ur du continent. C\u2019est d\u2019ailleurs moins que dans bien des d\u00e9serts. Cette s\u00e9cheresse et l&rsquo;absence de poussi\u00e8res conf\u00e8rent \u00e0 l&rsquo;air antarctique une extraordinaire puret\u00e9. Les temp\u00e9ratures diminuent, elles aussi, vers l&rsquo;int\u00e9rieur, mais \u00e9galement en fonction de l&rsquo;altitude ; entre la c\u00f4te et le point culminant de la calotte (4 000 m, dans l&rsquo;est), l&rsquo;\u00e9cart varie de 0\u00b0\u00e0 -35 \u00b0C l&rsquo;\u00e9t\u00e9, et de -10\u00b0 \u00e0 \u2013 80\u00b0C l&rsquo;hiver (minimum mondial : -98\u00b0C \u00e0 l\u2019Est de l\u2019Antarctique et maximum de 20,7\u00b0C enregistr\u00e9 sur la p\u00e9ninsule Antarctique en f\u00e9vrier 2020). Quant aux vents, la c\u00f4te antarctique subit les plus fortes rafales du monde : on a mesur\u00e9 des pointes \u00e0 327 km\/h en juin 1977 en Terre Ad\u00e9lie (l&rsquo;\u00e9chelle de Beaufort, qui s&rsquo;arr\u00eatait aux typhons, a d\u00fb \u00eatre compl\u00e9t\u00e9e&#8230;). \u00c0 ces vitesses, les hommes et le mat\u00e9riel s&rsquo;envolent ! Cette violence est due \u00e0 un \u00e9coulement particulier de l&rsquo;air polaire, tr\u00e8s froid au contact du sol et donc tr\u00e8s dense, qui \u00ab ruisselle \u00bb de plus en plus rapidement depuis les hauteurs de la calotte vers la p\u00e9riph\u00e9rie, sous une couche plus chaude. Ces vents sont dits catabatiques (du grec kata, en dessous). Les vents catabatiques \u00ab r\u00e9chauffent \u00bb les r\u00e9gions polaires en \u00ab emportant du froid \u00bb vers les r\u00e9gions p\u00e9riph\u00e9riques ; ils participent aussi \u00e0 la formation et \u00e0 la dispersion de la banquise. Les blizzards, eux, peuvent durer plusieurs jours avec d&rsquo;impr\u00e9visibles rafales ; ils soul\u00e8vent et transportent d&rsquo;\u00e9normes quantit\u00e9s de neige pr\u00e8s du sol, rendant brutalement tout d\u00e9placement impossible et dangereux. Un seul moyen de s&rsquo;en prot\u00e9ger : attendre et se mettre \u00e0 l\u2019abri.[\/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=\"size-medium wp-image-9357 aligncenter\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-300x257.png\" alt=\"\" width=\"300\" height=\"257\" srcset=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-300x257.png 300w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-1024x876.png 1024w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-768x657.png 768w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-1536x1314.png 1536w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2026\/03\/CLIMAT03-2048x1751.png 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><em>La force et la direction des vents en Antarctique.<\/em>[\/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][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<div id=\"propositions-d-activites\" class=\"pt-header\">\n<h3 class=\"text-primary\">Propositions d\u2019activit\u00e9s:<\/h3>\n<div id=\"propositions-d-activites\" class=\"pt-header\">\n<p><strong>L&rsquo;oc\u00e9an Austral<\/strong><\/p>\n<p><strong>Le climat antarctique<\/strong><\/p>\n<ul>\n<li>\u00c0 partir de quelle limite de latitude a-t-on une journ\u00e9e de 24 h (et un soleil de minuit) ?<\/li>\n<li>Comparez les mouvements ascendants d&rsquo;air chaud et descendants d&rsquo;air froid observ\u00e9s au niveau du globe \u00e0 ceuxconstat\u00e9s par un sp\u00e9cialiste du delta plane.<\/li>\n<li>Imagine une exp\u00e9rience pour faire plonger de l\u2019eau dense et sal\u00e9e dans un aquarium. Refais cette m\u00eame exp\u00e9rience avec de l\u2019eau chaude pour comparer leurs comportements.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<div id=\"pour-plus-de-details\" class=\"pt-header\">\n<h3 class=\"text-primary\"><i class=\"icon icon-pp-add\"><\/i>\u00a0Pour plus de d\u00e9tails :<\/h3>\n<p>Livres\u00a0:<\/p>\n<ul>\n<li>Glaces de l\u2019Antarctique \u2013 C. Lorius<\/li>\n<li>La voix des p\u00f4les \u2013 L. Lescarmontier<\/li>\n<li>Le changement climatique, Questions \/ R\u00e9ponses \u2013 M. Hirtzig, M. Tricoire, D. Wilgenbus<\/li>\n<\/ul>\n<p>Divers :<\/p>\n<ul>\n<li>Site de l\u2019Office for Climate Education : <a href=\"https:\/\/web.archive.org\/web\/20240718102800\/https:\/\/www.oce.global\/en\">oce.global<\/a><\/li>\n<\/ul>\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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