{"id":37947,"date":"2025-02-24T18:59:03","date_gmt":"2025-02-24T13:29:03","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=37947"},"modified":"2025-03-24T12:27:04","modified_gmt":"2025-03-24T06:57:04","slug":"greenland-ice-sheet-melting","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/24-02-2025\/greenland-ice-sheet-melting","title":{"rendered":"Glacier Ice Algae Accelerate Greenland Ice Sheet Melting"},"content":{"rendered":"\n<p><strong>Syllabus: GS3\/ Environment<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Context<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A study highlights how glacier microalgae accelerate Greenland Ice Sheet melting by efficiently colonizing exposed ice without additional nutrients.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Key Findings<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ice Algae\u2019s Role in Melting:<\/strong> Dark-pigmented microalgae grow rapidly on exposed ice surfaces.\n<ul class=\"wp-block-list\">\n<li>Their pigmentation reduces ice reflectivity, increasing heat absorption and accelerating melting.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Efficient Nutrient Uptake:<\/strong> Ice algae store phosphorus and sustain high carbon-to-nutrient ratios, enabling survival in nutrient-poor conditions.<\/li>\n\n\n\n<li><strong>Significance: <\/strong>The study stresses the need to integrate biological factors into climate projections.\n<ul class=\"wp-block-list\">\n<li>Ice algae have also been found in the Alps, Himalayas, and Alaska, suggesting that similar biological processes may contribute to glacier retreat globally.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-background\" style=\"background-color:#fff2cc\"><tbody><tr><td><strong>Ice Algae<\/strong><br>&#8211; Ice algae are <strong>single-celled, elongated, brownish, and ellipse-shaped<\/strong> microorganisms that thrive on ice surfaces worldwide.<br>&#8211; Similar to plants, they perform photosynthesis, releasing oxygen and producing organic molecules.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Implications<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Accelerated Sea-Level Rise:<\/strong> The <a href=\"https:\/\/www.nextias.com\/ca\/current-affairs\/14-11-2022\/greenland-ice-sheet\">Greenland Ice Sheet<\/a> is the largest contributor to global sea-level rise.\u00a0<\/li>\n\n\n\n<li><strong>Disruption of Ocean Circulation:<\/strong> The melting ice releases large volumes of freshwater, which disrupt thermohaline circulation such as the<strong> Atlantic Meridional Overturning Circulation, AMOC<\/strong>.<\/li>\n\n\n\n<li><strong>Impact on Global Climate: <\/strong>Darkened ice absorbs more heat, contributing to regional warming and amplifying Arctic temperature rise, which is already occurring at twice the global average.<\/li>\n\n\n\n<li><strong>Marine and Polar Ecosystems:<\/strong> The influx of freshwater into the ocean alters salinity and nutrient cycles, affecting marine food chains.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Way Forward<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Improved Climate Models:<\/strong> Incorporating biological factors can enhance the accuracy of sea-level rise predictions.<\/li>\n\n\n\n<li><strong>Mitigation Strategies:<\/strong> Addressing global warming to slow ice melt and minimize feedback loops.<\/li>\n\n\n\n<li><strong>Further Research:<\/strong> Understanding ice algae dynamics in different glacier regions to assess their overall impact.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-background\" style=\"background-color:#ebecf0\"><tbody><tr><td><strong>Greenland<\/strong><br>&#8211; Greenland, the <strong>world&#8217;s largest island<\/strong>, is an autonomous territory of <strong>Denmark <\/strong>located in the <strong>North Atlantic and Arctic Oceans.<\/strong>&nbsp;<br>&#8211; It lies between <strong>North America and Europe,<\/strong> with Canada to the west and Iceland to the east.&nbsp;<br>&#8211; Greenland&#8217;s <strong>80% area <\/strong>is covered by the Ice Sheet, the second-largest ice mass in the world after <strong>Antarctica.<\/strong><br>&#8211; <strong>The capital<\/strong> and largest city of Greenland is <strong>Nuuk.<\/strong><br><br><img loading=\"lazy\" decoding=\"async\" width=\"267\" height=\"189\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXdvCMpU17tMeJO6Juc1mhXQ_Djq7nJja5Eqy-fm_DsYAksE9KBh2APGC9eUfWrDHVF4Q5egdbaG6c0ellE89nXofC_jb1Rw8plXEp_PFGDyWKZaTfyazOGYUBh1hAcJ-jyOOaI7Iw?key=3SmskLqhCkNrTbKfnSjlKRqf\"><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.thehindu.com\/sci-tech\/how-glacier-ice-algae-accelerate-greenland-ice-sheet-melting\/article69247457.ece#:~:text=A%20new%20study%20reveals%20that,expanding\" rel=\"nofollow noopener\" target=\"_blank\"><strong>TH<\/strong><\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A study highlights how dark-pigmented microalgae accelerate Greenland Ice Sheet melting by efficiently colonizing exposed ice without additional nutrients.<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-37947","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/37947","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=37947"}],"version-history":[{"count":5,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/37947\/revisions"}],"predecessor-version":[{"id":39668,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/37947\/revisions\/39668"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=37947"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=37947"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=37947"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}