{"id":60049588,"date":"2024-09-04T13:13:15","date_gmt":"2024-09-04T12:13:15","guid":{"rendered":"https:\/\/dialogue.earth\/uncategorized\/climate-change-in-the-arctic-is-a-wake-up-call-for-the-global-south-2\/"},"modified":"2024-09-04T17:25:21","modified_gmt":"2024-09-04T16:25:21","slug":"opiniao-mudancas-climaticas-artico-alerta-sul-global","status":"publish","type":"opinion","link":"https:\/\/dialogue.earth\/pt-br\/clima\/opiniao-mudancas-climaticas-artico-alerta-sul-global\/","title":{"rendered":"Opini\u00e3o: Mudan\u00e7as clim\u00e1ticas no \u00c1rtico servem de alerta para o Sul Global"},"content":{"rendered":"\n<p>Em setembro de 1846, os navios expedicion\u00e1rios brit\u00e2nicos HMS Erebus e HMS Terror ficaram <a href=\"https:\/\/www.nationalgeographic.es\/historia\/hallado-el-hms-terror-perdido-en-el-artico-hace-168-anos\">presos<\/a> no \u00c1rtico canadense enquanto navegavam pela Passagem do Noroeste, rota mar\u00edtima entre a Europa e a \u00c1sia. Com a embarca\u00e7\u00e3o rodeada por gelo, a tripula\u00e7\u00e3o esperava seguir viagem no ver\u00e3o, mas a camada congelada n\u00e3o recuou. Todos os tripulantes morreram.<\/p>\n\n\n\n<p>Em 2016, 170 anos depois, um cruzeiro da Crystal Cruises fez hist\u00f3ria <a href=\"https:\/\/www.cruisenation.com\/blog\/crystal-cruises-makes-history-northwest-passage-itinerary\/\">como a primeira embarca\u00e7\u00e3o de seu tipo<\/a>\u00a0a navegar pela Passagem do Noroeste.<br><br>Esses dois epis\u00f3dios revelam como o derretimento do \u00c1rtico tem avan\u00e7ado rapidamente em pouco tempo. Em 2019, o Painel Intergovernamental sobre Mudan\u00e7as Clim\u00e1ticas (IPCC) alertou que a extens\u00e3o do gelo marinho no \u00c1rtico est\u00e1 <a href=\"https:\/\/www.ipcc.ch\/srocc\/chapter\/chapter-3-2\/#:~:text=Arctic%20sea%20ice%20extent%20continues\">diminuindo<\/a> progressivamente com o passar dos anos. Recentemente, foram registradas algumas das maiores redu\u00e7\u00f5es dos \u00faltimos mil anos \u2014 com picos de derretimento geralmente no m\u00eas de setembro. As geleiras da Groenl\u00e2ndia, maior massa de gelo do hemisf\u00e9rio norte, perderam um <a href=\"https:\/\/www.elmundo.es\/ciencia-y-salud\/medio-ambiente\/2023\/11\/10\/654cd056fc6c8391548b4576.html\">ter\u00e7o<\/a> de seu volume desde 1978.<\/p>\n\n\n\n<p>Mas qual \u00e9 a relev\u00e2ncia do degelo acelerado em um lugar in\u00f3spito e distante, onde a noite dura seis meses e para onde a maioria das pessoas provavelmente jamais ir\u00e1? Uma resposta simples \u00e9 que os impactos das mudan\u00e7as clim\u00e1ticas no gelo do norte tamb\u00e9m afetam o hemisf\u00e9rio sul, representando um risco para todo o planeta.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-aumento-do-nivel-do-mar-e-inundacoes\">Aumento do n\u00edvel do mar e inunda\u00e7\u00f5es<\/h2>\n\n\n\n<p>O derretimento glacial nas regi\u00f5es polares amea\u00e7a o futuro de muitas zonas costeiras. De acordo com uma pesquisa de Laura Larocca, professora assistente da Escola de Futuros do Oceano da Universidade Estadual do Arizona, nos Estados Unidos, o recuo das geleiras na Groenl\u00e2ndia e na Ant\u00e1rtida tem contribu\u00eddo para o aumento de <a href=\"https:\/\/news.northwestern.edu\/stories\/2023\/11\/greenlands-glacier-retreat-rate-has-doubled-over-past-two-decades\/\">21%<\/a> no n\u00edvel do mar desde a virada do s\u00e9culo.\u00a0<\/p>\n\n\n\n<p>At\u00e9 2100, <a href=\"https:\/\/www.theguardian.com\/environment\/2023\/jun\/26\/its-absolutely-guaranteed-the-best-and-worst-case-scenarios-for-sea-level-rise\">a eleva\u00e7\u00e3o do n\u00edvel do mar<\/a> dever\u00e1 atingir de 28 a 101 cent\u00edmetros. Os valores exatos depender\u00e3o do sucesso nos esfor\u00e7os de redu\u00e7\u00e3o das emiss\u00f5es de gases de efeito estufa. Alguns dos <a href=\"https:\/\/sealevel.nasa.gov\/ipcc-ar6-sea-level-projection-tool\">aumentos<\/a> mais significativos do n\u00edvel do mar ser\u00e3o vistos nas plan\u00edcies litor\u00e2neas rasas.<\/p>\n\n\n\n<p>Isso n\u00e3o ocorrer\u00e1 apenas no Norte Global, em pa\u00edses como os Estados Unidos, mas tamb\u00e9m no Sul Global. As na\u00e7\u00f5es do Sudeste Asi\u00e1tico, como Tail\u00e2ndia, Camboja, Indon\u00e9sia e Filipinas, ser\u00e3o <a href=\"https:\/\/nsidc.org\/learn\/ask-scientist\/where-will-sea-level-rise-most-ice-sheet-melt\">fortemente<\/a> afetadas, assim como os pa\u00edses do Mar do Caribe e <a href=\"https:\/\/globalclimaterisks.org\/insights\/blogs\/arctic-basecamp-insight-blogs\/greenland-slr\/\">Bangladesh<\/a>, no sul da \u00c1sia.<\/p>\n\n\n\n<div class=\"wp-block-cd-article-image aligncenter block--article-image block--article-image--article\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><div class=\"block--article-image__column\"><div class=\"hide-expand block--article-image__image\"><img class=\"lazy\" data-src=\"https:\/\/dialogue.earth\/content\/uploads\/2024\/09\/Sand-bags-protecting-Belize-beach_Alamy_2C4P2JK-2.jpg\" data-srcset=\"https:\/\/dialogue.earth\/content\/uploads\/2024\/09\/Sand-bags-protecting-Belize-beach_Alamy_2C4P2JK-2-768x512.jpg 768w, https:\/\/dialogue.earth\/content\/uploads\/2024\/09\/Sand-bags-protecting-Belize-beach_Alamy_2C4P2JK-2-1024x683.jpg 1024w, https:\/\/dialogue.earth\/content\/uploads\/2024\/09\/Sand-bags-protecting-Belize-beach_Alamy_2C4P2JK-2.jpg 2560w\" data-sizes=\"(max-width: 600px) 768px, (max-width: 1024px) 1024px, 2560px\" alt=\"Sand bags lined along beach \"\/><\/div><div class=\"block--article-image__content\"><div itemprop=\"caption\" class=\"block--article-image__caption\">Sacos de areia protegem a praia em San Pedro, Belize. Toda a regi\u00e3o caribenha pode ser duramente atingida pela eleva\u00e7\u00e3o do n\u00edvel do mar nos pr\u00f3ximos anos, como j\u00e1 ocorre em algumas ilhas (Imagem: Global Vibes \/ Alamy)<\/div><\/div><\/div><meta itemprop=\"contentUrl\" content=\"https:\/\/dialogue.earth\/content\/uploads\/2024\/09\/Sand-bags-protecting-Belize-beach_Alamy_2C4P2JK-2.jpg\"\/><meta itemprop=\"contentSize\" content=\"3 MB\"\/><meta itemprop=\"height\" content=\"1707\"\/><meta itemprop=\"width\" content=\"2560\"\/><meta itemprop=\"author\"\/><meta itemprop=\"representativeOfPage\" content=\"true\"\/><\/div>\n\n\n\n<p>Os signat\u00e1rios do Acordo de Paris firmaram o compromisso de conter o aumento da temperatura m\u00e9dia global para menos de 2\u00b0C acima dos n\u00edveis pr\u00e9-industriais. Um estudo publicado em 2018 pela revista cient\u00edfica Environmental Research Letters, do Reino Unido, estimou que, se as metas n\u00e3o forem cumpridas, a eleva\u00e7\u00e3o do n\u00edvel do oceano custar\u00e1 <a href=\"https:\/\/www.sciencedaily.com\/releases\/2018\/07\/180703190745.htm\">US$ 14 trilh\u00f5es<\/a> \u00e0 economia global em danos causados por enchentes recorrentes at\u00e9 2100. Isso se deve principalmente \u00e0 vulnerabilidade da infraestrutura b\u00e1sica, como usinas de energia, instala\u00e7\u00f5es de tratamento de \u00e1gua, cabos subterr\u00e2neos de comunica\u00e7\u00e3o e redes de transporte, incluindo portos e ferrovias<strong>.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-perturbacao-do-ecossistema-polar\">Perturba\u00e7\u00e3o do ecossistema polar<\/h2>\n\n\n\n<a class=\"wp-block-cd-related-news alignright block--related-news loading\" data-post-id=\"50389950\"><div class=\"block--related-news__image\"><\/div><div class=\"block--related-news__content\"><span class=\"block--related-news__heading\">LEIA MAIS<\/span><span class=\"block--related-news__title\"><\/span><\/div><\/a>\n\n\n\n<p>Algumas esp\u00e9cies marinhas do Atl\u00e2ntico Norte amea\u00e7adas pelo aquecimento de seus habitats t\u00eam migrado em dire\u00e7\u00e3o ao \u00c1rtico, em busca de \u00e1guas mais frias. Isso tem duas consequ\u00eancias: a competi\u00e7\u00e3o por alimento e espa\u00e7o com esp\u00e9cies vulner\u00e1veis e com seres nativo dessas \u00e1reas; e o decl\u00ednio das popula\u00e7\u00f5es de peixes, um dos pilares econ\u00f4micos de pa\u00edses como Isl\u00e2ndia, Noruega e Espanha.Os oceanos absorvem o di\u00f3xido de carbono (CO\u2082) emitido pelos combust\u00edveis f\u00f3sseis. O enorme fluxo de \u00e1gua doce proveniente do derretimento das geleiras pode reduzir a salinidade do oceano e <a href=\"https:\/\/www.ngenespanol.com\/ecologia\/cientificos-advierten-que-corriente-del-atlantico-esta-al-borde-del-colapso\/\">desestabilizar<\/a> as pr\u00f3prias correntes oce\u00e2nicas, vitais para essa absor\u00e7\u00e3o de carbono e para a regula\u00e7\u00e3o do clima global. Isso, por sua vez, quebra o ciclo do CO\u2082, aumentando sua concentra\u00e7\u00e3o na atmosfera e agravando o aquecimento global. Al\u00e9m disso, a baixa salinidade do oceano pode desacelerar a Corrente do Golfo, afetando o inverno na Europa e a biodiversidade do Golfo do M\u00e9xico e do Atl\u00e2ntico Norte.<\/p>\n\n\n\n<p>Mas os estragos n\u00e3o param por a\u00ed. A Corrente do Golfo influencia significativamente as condi\u00e7\u00f5es clim\u00e1ticas em boa parte das na\u00e7\u00f5es em desenvolvimento. A desacelera\u00e7\u00e3o significaria um <a href=\"https:\/\/www.theguardian.com\/environment\/2021\/aug\/05\/climate-crisis-scientists-spot-warning-signs-of-gulf-stream-collapse\">aumento<\/a> nos eventos clim\u00e1ticos extremos na Am\u00e9rica do Sul, no Caribe, na \u00cdndia e na \u00c1frica Ocidental. As enchentes ou secas nessas regi\u00f5es colocam em risco a seguran\u00e7a alimentar e a vida de centenas de milh\u00f5es de pessoas.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-geopolitica-da-transicao-energetica\">Geopol\u00edtica da transi\u00e7\u00e3o energ\u00e9tica<\/h2>\n\n\n\n<p>Estima-se que aproximadamente <a href=\"https:\/\/pubs.usgs.gov\/fs\/2008\/3049\/fs2008-3049.pdf\">13%<\/a> (90 bilh\u00f5es de barris) das reservas globais de petr\u00f3leo convencional ainda n\u00e3o comprovadas e 30% das reservas de g\u00e1s natural convencional n\u00e3o comprovadas estejam sob a tundra e o gelo do \u00c1rtico. Al\u00e9m disso, o \u00c1rtico cont\u00e9m <a href=\"https:\/\/www.icog.es\/TyT\/index.php\/2024\/02\/los-recursos-minerales-y-energeticos-en-el-artico-una-nueva-frontera-a-explorar\/\">minerais<\/a> essenciais, como n\u00edquel, zinco e cobre.<\/p>\n\n\n\n<p>Embora esses recursos permane\u00e7am inacess\u00edveis devido ao clima extremo, eles est\u00e3o localizados parcialmente nas Zonas Econ\u00f4micas Exclusivas pertencentes a EUA, Canad\u00e1, Noruega, R\u00fassia e Dinamarca. O restante est\u00e1 localizado em uma zona internacional com 2,8 milh\u00f5es de quil\u00f4metros quadrados, no <a href=\"https:\/\/arctic-council.org\/news\/exploring-the-arctic-ocean-the-agreement-that-protects-an-unknown-ecosystem\/\">Oceano \u00c1rtico central<\/a>. Pa\u00edses do mundo todo assinaram o <a href=\"https:\/\/dialogue.earth\/pt-br\/oceanos\/364022-onu-acordo-vinculante-alto-mar\/\">Tratado de Alto-Mar<\/a> no ano passado para regulamentar essa zona internacional, mas o acordo s\u00f3 ser\u00e1 v\u00e1lido legalmente ap\u00f3s a ratifica\u00e7\u00e3o de pelo menos <a href=\"https:\/\/highseasalliance.org\/treaty-ratification\/\">60 pa\u00edses<\/a>.<\/p>\n\n\n\n<a class=\"wp-block-cd-related-news alignright block--related-news loading\" data-post-id=\"50364749\"><div class=\"block--related-news__image\"><\/div><div class=\"block--related-news__content\"><span class=\"block--related-news__heading\">LEIA MAIS<\/span><span class=\"block--related-news__title\"><\/span><\/div><\/a>\n\n\n\n<p>Caso o degelo polar libere o acesso a esses recursos, novos cen\u00e1rios geopol\u00edticos poder\u00e3o se desenhar, com diferentes consequ\u00eancias. Por um lado, os pa\u00edses com acesso soberano a esses recursos poderiam sofrer press\u00e3o pol\u00edtica para \u201crefossilizar\u201d suas economias, deixando de lado quaisquer estrat\u00e9gias de descarboniza\u00e7\u00e3o. Por outro, pot\u00eancias n\u00e3o \u00e1rticas, como a China e a \u00cdndia, est\u00e3o buscando alian\u00e7as comerciais, especialmente com a Groenl\u00e2ndia e a R\u00fassia, para a explora\u00e7\u00e3o de terras raras \u2014 minerais essenciais para <a href=\"https:\/\/dialogue.earth\/en\/energy\/53160-the-risks-and-rewards-of-the-minerals-required-for-the-energy-transition\/\">muitos dispositivos de alta tecnologia<\/a> \u2014 al\u00e9m de hidrocarbonetos nas costas e Zonas Econ\u00f4micas Exclusivas (ZEEs) desses pa\u00edses. Seria uma forma de se antecipar estrategicamente a essa nova explora\u00e7\u00e3o de combust\u00edveis f\u00f3sseis para refor\u00e7ar sua pr\u00f3pria seguran\u00e7a energ\u00e9tica.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-novo-xadrez-global\">Novo xadrez global<\/h2>\n\n\n\n<p>O derretimento do gelo no \u00c1rtico representa mais do que grandes riscos ambientais. Ele remodelar\u00e1 o tabuleiro de xadrez geopol\u00edtico global, provocando tens\u00f5es sobre o acesso a recursos energ\u00e9ticos e rotas mar\u00edtimas.&nbsp;<\/p>\n\n\n\n<p>Nesse contexto, a coopera\u00e7\u00e3o internacional e a governan\u00e7a ser\u00e3o cruciais para gerenciar os desafios e as oportunidades de uma regi\u00e3o no epicentro das mudan\u00e7as clim\u00e1ticas. Para os pa\u00edses do Sul Global, o Polo Norte deve ser um motivo de enorme preocupa\u00e7\u00e3o \u2014 afinal, s\u00e3o eles que pagar\u00e3o o pre\u00e7o pelas decis\u00f5es e medidas tomadas sobre o \u00c1rtico.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Derretimento de gelo no \u00c1rtico se intensifica, trazendo riscos ambientais e alterando o cen\u00e1rio geopol\u00edtico at\u00e9 em pa\u00edses subdesenvolvidos, escreve Felipe Arango Garc\u00eda<\/p>\n","protected":false},"featured_media":60049522,"comment_status":"closed","ping_status":"closed","template":"","categories":[50039920,50039947],"tags":[50042240,50039989,50040214,50041498],"country":[50040492,50041258,50040509,50040799,50003545,50040807,50040879,50003538,50040999,50041023,50041038,50040594,50041182],"class_list":["post-60049588","opinion","type-opinion","status-publish","has-post-thumbnail","hentry","category-clima","category-oceanos","tag-aquecimento-global","tag-arctic-pt-br","tag-aumento-do-nivel-do-mar","tag-glaciares-pt-br","country-bangladesh-pt-br","country-belize-pt-br","country-cambodia-pt-br","country-canada-pt-br","country-cuba-pt-br","country-denmark-pt-br","country-indonesia-pt-br","country-mexico-pt-br","country-norway-pt-br","country-philippines-pt-br","country-russia-pt-br","country-thailand-pt-br","country-united-states-of-america-pt-br"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.0 (Yoast SEO v26.0) - 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