Rapid Sea-Level Rise Expected Even with 1.5°C Warming Limit

Fast Summary

• Limiting global warming to 1.5°C above pre-industrial levels will not prevent sea levels from rising substantially over the next centuries, according to new research.
• Satellite data and studies indicate Greenland and West Antarctic ice sheets are already losing ice rapidly, even at 1.2°C of warming.
• Predictions estimate that temperatures around 2.9°C by 2100 could led to the collapse of both Greenland and West Antarctic ice sheets, causing over 12 metres of sea level rise.
• The review examines satellite observations from the past three decades, historical warm periods in Earth’s history, and advanced computer models regarding ice sheet behavior.
• Current trends suggest previous models underestimated rapid responses in ice mass loss observed through satellites; such losses are described as “unprecedented.”
• Historical records show that warmer intervals during the last 3 million years corresponded with significantly higher sea levels.
• IPCC’s earlier report predicted up to 2 metres of sea level rise if warming is limited to 1.5°C; recent findings suggest worst-case scenarios might potentially be unfolding now based on satellite evidence.
• A reduction in global average temperature closer to about +1°C is crucial for slowing effects like melting ice sheets and worsening coastal flooding risks globally.

Indian Opinion Analysis

This study underscores a critical challenge for coastal nations worldwide, including India: adapting sustainably to long-term environmental changes driven by climate change. For India specifically-with densely populated coastlines like mumbai, Chennai, Kolkata-and important fishing industries reliant on coastal stability-a rise in sea levels poses direct threats ranging from displacement crises to economic costs tied with infrastructure damage.

While wealthier nations may have better resources for defending coastlines against rising seas via technological interventions or relocations, less wealthy regions such as India’s vulnerable coastal communities might struggle greatly without proactive measures including early adaptation plans or international technical aid partnerships. In addition-emphasizing efforts tied toward achieving/reducing Paris low-notice-affect.shortcuts