{"id":36930,"date":"2025-02-07T19:05:21","date_gmt":"2025-02-07T13:35:21","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=36930"},"modified":"2025-08-11T15:49:28","modified_gmt":"2025-08-11T10:19:28","slug":"climate-crisis-marine-heatwaves","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/07-02-2025\/climate-crisis-marine-heatwaves","title":{"rendered":"Climate Crisis has Intensified Marine Heatwaves Across the World"},"content":{"rendered":"\n<p><strong>Syllabus :GS3\/Environment&nbsp;<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>In News<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In January 2025, marine heatwaves (MHWs) in Western Australia led to the death of over 30,000 fish.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What are Marine Heatwaves?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>They are periods of extremely high temperatures in the ocean.<\/li>\n\n\n\n<li>They occur when sea surface temperatures rise 3-4\u00b0C above average for at least five days.\n<ul class=\"wp-block-list\">\n<li>They can last from weeks to years.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.nextias.com\/blog\/climate-change\/\" data-type=\"link\" data-id=\"https:\/\/www.nextias.com\/blog\/climate-change\/\">Climate change<\/a> <\/strong>is the primary cause, with 90% of excess heat absorbed by oceans.\n<ul class=\"wp-block-list\">\n<li>They have become more frequent, intense, and longer-lasting in recent decades.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Global Presence<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>They are observed in several oceanic regions: North Pacific, North Atlantic, Mediterranean, Caribbean Sea, and parts of the Indian Ocean.<\/li>\n\n\n\n<li>They can cause extreme weather events, like tropical storms and hurricanes, and disrupt the water cycle, increasing floods, droughts, and wildfires.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Recent Trends in the Indian Ocean<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MHWs, once rare in the tropical Indian Ocean, have become annual events.<\/li>\n\n\n\n<li>Western Indian Ocean and Bay of Bengal experienced a significant rise in MHWs, with 1.5 events per decade in the western Indian Ocean and 0.5 events per decade in the Bay of Bengal between 1982-2018.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Impacts<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Monsoons<\/strong>: MHWs in the western Indian Ocean and Bay of Bengal influence monsoon patterns, causing drying in central India and increased rainfall in southern India.\n<ul class=\"wp-block-list\">\n<li>These changes are linked to altered atmospheric circulation driven by the heatwaves.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Socio-economic: <\/strong>MHWs negatively affect coastal communities, aquaculture, fisheries, and tourism.\n<ul class=\"wp-block-list\">\n<li>They can reduce productivity of important species like lobster, snow crab, and scallops.<\/li>\n\n\n\n<li>Disruption of ecosystems can harm the fishing industry and related livelihoods.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img data-dominant-color=\"d2c9d0\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"396\" src=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2025\/02\/marine-heatwaves.webp\" alt=\"marine heatwaves\" class=\"not-transparent wp-image-36931\" style=\"--dominant-color: #d2c9d0; width:468px;height:auto\" srcset=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2025\/02\/marine-heatwaves.webp 670w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2025\/02\/marine-heatwaves-300x177.webp 300w\" sizes=\"auto, (max-width: 670px) 100vw, 670px\" \/><\/figure>\n<\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Biodiversity and Ecosystem Destruction: <\/strong>MHWs can cause mass mortality of marine species, forcing them to relocate or change behavior.\n<ul class=\"wp-block-list\">\n<li>Ecosystems, such as kelp forests and coral reefs, are especially sensitive to MHWs.\n<ul class=\"wp-block-list\">\n<li>MHWs contribute to coral bleaching, reducing coral reproductive ability and making them more vulnerable to disease.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Other threats, like ocean acidification and overfishing, compound the damage caused by MHWs.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Strategies to Combat MHWs<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Slow down ocean warming<\/strong> by reducing fossil fuel emissions (aligning with Paris Agreement goals).<\/li>\n\n\n\n<li><strong>Invest in nature-based solutions<\/strong> and apply the IUCN Global Standard for Nature-based Solutions.<\/li>\n\n\n\n<li><strong>Build research capacity <\/strong>to monitor MHWs, understand their impacts, and predict future events.<\/li>\n\n\n\n<li><strong>Develop global research networks<\/strong> (e.g., Marine Heatwave International Group).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Way Ahead<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Governments should implement protective measures, such as marine protected areas, to safeguard vulnerable species.\n<ul class=\"wp-block-list\">\n<li>Enforce fishing regulations and catch management to limit economic losses.<\/li>\n\n\n\n<li>Raise awareness among stakeholders, including policymakers, researchers, and the private sector.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Source :IE<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In January 2025, marine heatwaves (MHWs) in Western Australia led to the death of over 30,000 fish.<\/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-36930","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\/36930","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=36930"}],"version-history":[{"count":2,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/36930\/revisions"}],"predecessor-version":[{"id":50952,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/36930\/revisions\/50952"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=36930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=36930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=36930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}