Marine Heatwaves

SUPER EL NIÑO: CAUSES, GLOBAL IMPACTS AND IMPLICATIONS FOR INDIA

A Super El Niño involves extreme warming of the equatorial Pacific Ocean, severely disrupting global weather. It weakens the Indian monsoon, triggers marine heatwaves, and threatens agricultural yields, requiring urgent climate-resilient planning and robust early warning systems to mitigate localized and macroeconomic disasters.

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CORAL REEFS AND CLIMATE RESILIENCE: CAN CORALS ADAPT TO GLOBAL WARMING?

Scientists recently mapped 165,000 sq km of climate-resilient coral reefs globally and successfully bred adult corals for enhanced heat tolerance. These interventions, alongside drastic carbon emission cuts, are crucial for combating the 4th Global Coral Bleaching Event and saving marine ecosystems.

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WORLD’S FOURTH MASS CORAL BLEACHING EVENT: CAUSES, IMPACTS, AND WAY FORWARD

The 2023–2025 global coral bleaching event, the most extensive ever recorded, impacted 84.4% of reefs worldwide. Driven by extreme marine heatwaves, it highlights the urgent need for resilience-based management, emission reductions, and adaptive global conservation strategies.

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FRESHENING OF THE SOUTHERN INDIAN OCEAN: CAUSES AND IMPACTS

A new study finds rapid freshening in the Southern Indian Ocean due to warming-driven wind shifts moving water from the Indo-Pacific Freshwater Pool. This creates stratification that traps heat, blocks nutrients, harms fisheries, may weaken AMOC, and heighten cyclones and marine heatwaves.

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DISCOVERY OF RESILIENT CORALS IN LAKSHADWEEP

Amid the Fourth Global Mass Coral Bleaching Event, scientists found a resilient 1.8 km reef near Kalpeni Island, Lakshadweep, hosting 35 species despite global heat stress. It offers genetic hope against marine heatwaves. The discovery strengthens India’s conservation push, including Biorock restoration and Wildlife Protection Act safeguards.

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INDIA'S CLIMATE CRISIS AND THE PATH FORWARD

A PLOS Climate update reveals India has warmed by 0.9°C since 1901, leading to intensified Arabian Sea cyclones, rising marine heatwaves, and Himalayan ice loss. Urgent action is needed for adaptation, resilient infrastructure, and climate-smart agriculture to safeguard water security and coastal communities.

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