Scientists warn of severe impact as sudden global temperature swings increase

Climate change is presenting new challenges globally, with scientists observing a sharp increase in sudden and extreme temperature shifts, known as “rapid temperature flips.”

Researchers from China, the United States, and Canada have identified a growing trend of temperatures fluctuating drastically within short periods. These fluctuations—from intense heat to cold or vice versa—are becoming more common and pose serious risks, particularly to vulnerable countries like Nepal.

These findings, published in the international journal Nature Communications, are based on the analysis of global temperature data from 1961 to 2023, focusing on deviations occurring within five-day periods.

The study found that more than 60% of the planet has experienced an increase in the frequency, intensity, and speed of such changes over the past six decades. South America, Western Europe, Africa, South Asia, and Southeast Asia are among the most affected regions.

Though Nepal was not specifically mentioned, its inclusion in South Asia suggests it is highly exposed to these changes. Scientists warn that developing nations may be 4 to 6 times more vulnerable than developed countries.

Real-World Examples:

• In March 2012, temperatures in North America rose by 10°C above normal and then dropped by 5°C within a week, severely damaging early-blooming crops.
• The Rocky Mountains experienced a heat wave followed by a sudden 20°C drop, leading to heavy snowfall and power disruptions.
• In April 2021, Europe saw a warm spell followed by snowfall, damaging crops across several regions.

Using climate models and historical data, scientists predict that if greenhouse gas emissions continue at current levels, the intensity and frequency of extreme weather events will increase dramatically by the end of the century.

They urge strengthening the resilience of developing nations to adapt to such rapid climate changes.

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