{"id":1744,"date":"2024-10-18T10:44:30","date_gmt":"2024-10-18T10:44:30","guid":{"rendered":"https:\/\/iasquest.com\/?p=1744"},"modified":"2026-02-11T19:03:58","modified_gmt":"2026-02-11T19:03:58","slug":"gs-1important-geophysical-phenomena-such-as-earthquakes-tsunami-volcanic-activity-cyclone-etc-geographical-features-and-their-location-changes-in-critical-geographical-features-including-water","status":"publish","type":"post","link":"https:\/\/kingmakersiasacademy.com\/current-affairs\/gs-1important-geophysical-phenomena-such-as-earthquakes-tsunami-volcanic-activity-cyclone-etc-geographical-features-and-their-location-changes-in-critical-geographical-features-including-water\/","title":{"rendered":"GS-1:Important Geophysical Phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc., geographical features and their location-changes in critical geographical features (including water-bodies and ice-caps) and in flora and fauna and the effects of such changes."},"content":{"rendered":"\n

In News: Why researchers studied marine heat waves more than 200m below the ocean surface<\/strong><\/p>\n\n\n\n

2.Bring out the relationship between climate change and the increasing frequency and intensity of marine heat waves (MHWs).<\/strong><\/p>\n\n\n\n

Relationship between climate change and MHWs:<\/strong>
\u25cf Anthropogenic influence:<\/strong> According to a study published in Nature Geoscience,human activities have increased the likelihood of MHWs, with approximately 87% attributed to greenhouse gas emissions.
\u25cf Increased frequency and intensity:<\/strong>According to Nature Geoscience, MHWs have become 50% more frequent in the past decade, with projections indicating a potential 50-fold increase by 2100.
\u25cf Reduced sea ice:<\/strong> The decline of sea ice, particularly in the Arctic, can disrupt ocean circulation patterns and contribute to the formation of MHWs in adjacent regions.
\u25cf Temperature anomalies:<\/strong> Accelerated warming has led to higher sea surface temperature (SST) anomalies, contributing to MHW occurrences.
\u25cf Ecosystem vulnerability:<\/strong> Marine species near thermal limits are at risk, leading to increased mortality and shifts in species distributions.
\u25cf Feedback mechanisms:<\/strong> Changes in ocean currents and weather patterns exacerbate local warming, complicating the relationship between climate change and marine ecosystems.
\u25cf Long-term projections:<\/strong> Climate models predict rising intensity and duration of MHWs under high-emission scenarios, necessitating urgent climate action.<\/p>\n\n\n\n

Implications of MHWs:<\/strong>
\u25cf Ecosystem disruption:<\/strong> MHWs cause coral bleaching, altered migration patterns, and shifts in marine biodiversity.
\u25cf Economic consequences:<\/strong> Coastal communities reliant on fisheries and tourism face economic losses due to disrupted fish stocks.
\u25cf Biodiversity loss: <\/strong>Prolonged high temperatures can lead to local extinctions and reduced biodiversity.
\u25cf Public health risks:<\/strong> Warmer oceans may increase pathogens, impacting marine life health and food security.
\u25cf Socio-economic impact:<\/strong> MHWs threaten livelihoods and food security, increasing vulnerability to extreme weather events.
Thus the interplay between climate change and increasing MHWs presents a complex challenge that requires comprehensive understanding and proactive measures to mitigate its impacts on marine ecosystems and coastal communities.<\/p>\n\n\n\n

PYQ<\/strong><\/p>\n\n\n\n

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  1. What is sea surface temperature rise? How does it affect the formation of tropical cyclones?2024<\/li>\n\n\n\n
  2. Bring out the relationship between the shrinking Himalayan glaciers and the symptoms of climate change in the Indian sub-continent. 2014<\/li>\n<\/ol>\n\n\n\n

    Source:<\/strong><\/p>\n\n\n\n

    https:\/\/indianexpress.com\/article\/explained\/explained-sci-tech\/new-study-ocean-heat-waves-9626685\/<\/a><\/p>\n\n\n\n

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