{"id":56256,"date":"2023-11-24T11:56:50","date_gmt":"2023-11-24T11:56:50","guid":{"rendered":"https:\/\/www.africa-press.net\/cameroun\/politique\/comment-la-montee-des-eaux-va-transformer-lafrique"},"modified":"2023-11-24T12:03:19","modified_gmt":"2023-11-24T12:03:19","slug":"comment-la-montee-des-eaux-va-transformer-lafrique","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/cameroun\/dossiers\/comment-la-montee-des-eaux-va-transformer-lafrique","title":{"rendered":"Comment la mont\u00e9e des eaux va transformer l\u2019Afrique"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Cameroun. <\/strong><\/span>C\u2019est l\u2019une des conse\u0301quences du de\u0301re\u0300glement climatique qui occupera les de\u0301bats a\u0300 la COP28. La monte\u0301e du niveau de la mer va changer le visage du continent, en particulier en Afrique de l\u2019Ouest. E\u0301tat des lieux en infographies.<\/p>\n<p>En Afrique, c\u2019est de\u0301ja\u0300 une re\u0301alite\u0301 face a\u0300 laquelle les populations co\u0302tie\u0300res doivent s\u2019adapter, tant bien que mal. E\u0301coles, maisons, cimetie\u0300res&#8230; Du Se\u0301ne\u0301gal au Be\u0301nin en passant par le Maroc, des pans entiers de quartiers sont peu a\u0300 peu grignote\u0301s par les eaux. Parfois, il s\u2019agit de monuments historiques ou naturels, inscrits au patrimoine de l\u2019humanite\u0301, a\u0300 l\u2019image des sites arche\u0301ologiques dans le nord du Sinai\u0308, en E\u0301gypte, ou du parc national du Sine Saloum, dans le sud du Se\u0301ne\u0301gal.<\/p>\n<p>Une e\u0301tude publie\u0301e en 2022 dans la revue Nature Climate Change dresse un constat plus qu\u2019alarmant : sur les 284 sites du patrimoine africain, 56 sont menace\u0301s par la monte\u0301e des eaux dans le sie\u0300cle a\u0300 venir. Quelles sont les causes de ce phe\u0301nome\u0300ne ? Elles sont multiples, mais ont toutes en commun d\u2019e\u0302tre cause\u0301es par l\u2019activite\u0301 humaine. Le phe\u0301nome\u0300ne d\u2019e\u0301le\u0301vation du niveau de la mer est du\u0302 aux effets combine\u0301s de la fonte des glaces continentales et de la calotte glacie\u0300re, ainsi que l\u2019e\u0301le\u0301vation de la tempe\u0301rature des mers. En se re\u0301chauffant, la mer \u00ab gonfle \u00bb et le niveau de l\u2019eau monte.<\/p>\n<p>Un phe\u0301nome\u0300ne potentiellement de\u0301vastateur en Afrique de l\u2019Ouest, ou un tiers de la population vit en zone co\u0302tie\u0300re. \u00ab Pour l\u2019instant, l\u2019e\u0301rosion en Afrique de l\u2019Ouest est principalement due au de\u0301ficit de sable provoque\u0301 par la mise en place de barrages hydroe\u0301lectriques, qui provoquent un de\u0301ficit de se\u0301dimentation \u00bb, explique Rafael Almar, oce\u0301anographe physicien a\u0300 l\u2019Institut de recherche pour le de\u0301veloppement (IRD). \u00ab L\u2019apport de sable a ainsi largement diminue\u0301 dans les rivie\u0300res. Quant aux inondations qui frappent les zones co\u0302tie\u0300res, elles peuvent e\u0302tre dues au de\u0301frichement de la mangrove dans les estuaires, mais aussi engendre\u0301es par l\u2019urbanisation galopante. \u00bb<\/p>\n<p>1m d\u2019ici a\u0300 2100<\/p>\n<p>Expert au sein du programme \u00ab WACA-VAR \u00bb (Zones co\u0302tie\u0300res d\u2019Afrique de l\u2019Ouest), le chercheur participe a\u0300 la cartographie des impacts du changement climatique dans cette re\u0301gion. Avec trois axe d\u2019e\u0301tude majeurs : vulne\u0301rabilite\u0301, adaptabilite\u0301 et re\u0301silience. \u00ab Les co\u0302tes ouest-africaines sont des zones sableuses et tre\u0300s basses, ce qui les rend tre\u0300s mobiles et sujettes a\u0300 l\u2019e\u0301rosion. Ces co\u0302tes s\u2019inondent rapidement et sont donc sensibles a\u0300 tout changement. \u00bb<\/p>\n<p>Selon les estimations du Giec, la hausse du niveau des mers devrait atteindre pre\u0300s d\u2019un me\u0300tre d\u2019ici a\u0300 2100 dans le cas d\u2019un sce\u0301nario de re\u0301chauffement climatique a\u0300 +4\u00b0C. Sur le court terme, ce sont entre 108 et 116 millions d\u2019Africains re\u0301sidant sur les zones co\u0302tie\u0300res qui seront expose\u0301s de\u0300s 2030. Et la dynamique s\u2019acce\u0301le\u0300re : ils seront 265 millions a\u0300 y vivre d\u2019ici a\u0300 2100. Existe-t-il des pistes pour re\u0301soudre cette e\u0301quation ? Rendez-vous ce jeudi 9 novembre, dans le second volet de cette analyse en infographie pour le savoir.<\/p>\n<p>Source: JeuneAfrique<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/cameroun\">Cameroun<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Cameroun. C\u2019est l\u2019une des conse\u0301quences du de\u0301re\u0300glement climatique qui occupera les de\u0301bats a\u0300 la COP28. La monte\u0301e du niveau de la mer va changer le visage du continent, en particulier en Afrique de l\u2019Ouest. E\u0301tat des lieux en infographies. En Afrique, c\u2019est de\u0301ja\u0300 une re\u0301alite\u0301 face a\u0300 laquelle les populations co\u0302tie\u0300res doivent s\u2019adapter, [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":56253,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,10],"tags":[36,50,49],"class_list":["post-56256","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dossiers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-cameroun","tag-cameroun"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Comment la mont\u00e9e des eaux va transformer l\u2019Afrique - Cameroun<\/title>\n<meta name=\"description\" content=\"C\u2019est l\u2019une des conse\u0301quences du de\u0301re\u0300glement climatique qui occupera les de\u0301bats a\u0300 la COP28. 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