Study on Extreme Climate Events

Context:

A new study published in Nature Ecology & Evolution warns that climate change-driven extreme weather events could severely impact global biodiversity in the coming decades. The research highlights that by 2085, nearly 36% of terrestrial animal habitats may be exposed to multiple extreme climate events if global emissions continue on a high trajectory.

About Extreme Climate Events:

Extreme climate events are rare and high-intensity weather phenomena that go beyond normal historical patterns. They include heatwaves and cold waves, floods and heavy rainfall, droughts, wildfires, and cyclones and storms. These events are increasingly becoming more frequent and severe due to human-induced climate change, particularly the rising concentration of greenhouse gases in the atmosphere.

Key Findings of the Study:

The study by the Potsdam Institute for Climate Impact Research analysed around 34,000 vertebrate species and 794 ecosystems. It shows rising exposure of habitats to climate extremes by 2050, about 74% may face heatwaves, 16% wildfires, 8% droughts, and 3% floods. By 2085, nearly one-third of land habitats could face multiple overlapping extreme events. Biodiversity hotspots like the Amazon, tropical Africa, and Southeast Asia are expected to be the most affected, with increasing heatwaves, droughts, and fires threatening ecosystems.

Why This Study is Important:

The study highlights that climate change is not just gradual warming but also increasing extreme events that can cause mass species deaths and ecosystem disruption. For instance, Australian heatwaves (2019–20) killed over 72,000 flying foxes, and Pantanal wildfires killed around 17 million vertebrates. It also stresses that rapid emission cuts to net zero can still reduce these risks, emphasizing the urgent need for global climate action.

Implications for India and the World:

• • • Biodiversity loss: India, being a mega-diverse country, may face risks to ecosystems like the Western Ghats, Himalayas, and coastal regions.
    • Disaster risk increase: Higher frequency of heatwaves, floods, and forest fires will increase disaster management challenges.
    • Need for climate-resilient planning: Conservation strategies must include not only gradual climate change but also extreme event preparedness.

Way Forward:

• • • Accelerate global transition to net-zero emissions
    • Strengthen ecosystem-based adaptation strategies
    • Improve early warning systems for extreme events
    • Integrate climate risk into biodiversity conservation planning
    • Enhance international cooperation on climate mitigation

Conclusion:

The study clearly shows that climate change is intensifying not only average temperatures but also extreme weather events that threaten global biodiversity. Without urgent emission reductions, more than one-third of land animal habitats could face severe and overlapping climate shocks by the end of the century. However, timely climate action can still prevent the worst outcomes.