Un estudi liderat per investigadors de l’Institut de Ci\u00e8ncia i Tecnologia Ambientals de la Universitat Aut\u00f2noma de Barcelona (ICTA-UAB) i la Universitat de Barcelona (UB) revela un mecanisme poc conegut, per\u00f2 de gran rellev\u00e0ncia clim\u00e0tica: l\u2019alliberament de met\u00e0 (CH\u2084) i di\u00f2xid de carboni (CO\u2082) cap a l\u2019atmosfera a trav\u00e9s d\u2019aig\u00fces subterr\u00e0nies que travessen zones \u00e0rtiques afectades pel desgla\u00e7 del permafrost.<\/p>\n
La recerca ha demostrat que l\u2019escalfament global i l\u2019augment de les precipitacions activen escorrenties subterr\u00e0nies carregades de gasos que acaben desprenent-se en llacs \u00e0rtics. Mitjan\u00e7ant l\u2019\u00fas de t\u00e8cniques com la detecci\u00f3 de rad\u00f3 com a marcador de flux subterrani, l\u2019estudi ha evidenciat que aquestes aig\u00fces contenen alts nivells de met\u00e0 generat per activitat microbiana en s\u00f2ls que fins fa poc romanien congelats.<\/p>\n
Aquesta din\u00e0mica s\u2019intensifica especialment durant els mesos d\u2019estiu, coincidint amb temperatures m\u00e9s altes i un major desgla\u00e7 de neu i gel. L\u2019estudi alerta que l\u2019augment previst de les pluges a l\u2019\u00c0rtic podria incrementar significativament aquest mecanisme d\u2019alliberament de gasos d\u2019efecte hivernacle.<\/p>\n
Els resultats posen de manifest la necessitat d\u2019incorporar aquest nou flux subterrani de carboni als models clim\u00e0tics globals, ja que podria suposar una font d\u2019emissions fins ara infraestimada. Aix\u00f2 \u00e9s especialment rellevant en un context de canvi accelerat a les regions polars, que actuen com a indicadors avan\u00e7ats de la crisi clim\u00e0tica planet\u00e0ria.<\/p>\n","protected":false},"excerpt":{"rendered":"
Un estudi liderat per investigadors de l’Institut de Ci\u00e8ncia i Tecnologia Ambientals de la Universitat Aut\u00f2noma de Barcelona (ICTA-UAB) i la Universitat de Barcelona (UB) revela un mecanisme poc conegut, per\u00f2 de gran rellev\u00e0ncia clim\u00e0tica: l\u2019alliberament de met\u00e0 (CH\u2084) i di\u00f2xid de carboni (CO\u2082) cap a l\u2019atmosfera a trav\u00e9s d\u2019aig\u00fces subterr\u00e0nies que travessen zones \u00e0rtiques […]<\/p>\n","protected":false},"author":2,"featured_media":54729,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[7],"tags":[],"class_list":["post-54731","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized-ca","entry"],"_links":{"self":[{"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/posts\/54731","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/comments?post=54731"}],"version-history":[{"count":1,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/posts\/54731\/revisions"}],"predecessor-version":[{"id":54732,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/posts\/54731\/revisions\/54732"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/media\/54729"}],"wp:attachment":[{"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/media?parent=54731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/categories?post=54731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/econia.net\/ca\/wp-json\/wp\/v2\/tags?post=54731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}