Relevance: GS-III (Climate Change, Disaster Management); Source: WWA Study, International News Reports
News
A new analysis by the World Weather Attribution (WWA) found that the recent cyclones and floods in Sri Lanka, Malaysia, Indonesia and Thailand became far more destructive due to climate change, deforestation, and unplanned urban growth.
How Climate Change Intensified the Cyclones
- Global temperatures have risen by about 1.3°C, increasing atmospheric moisture and making heavy rainfall more likely.
- Warmer sea surface temperatures gave additional energy to the cyclones, increasing rainfall intensity and storm strength.
- Extreme rainfall events now occur more frequently in South and Southeast Asia.
Role of Deforestation and Urbanisation
- Large-scale loss of forest cover reduced soil stability and increased surface runoff, worsening floods and landslides.
- Rapid, unregulated urban expansion into high-risk flood plains increased damage to homes, infrastructure and cropland.
- Poor drainage systems and blocked waterways amplified flood severity.
| UPSC Value Box
Key Concept: Tropical Cyclone A tropical cyclone is a warm-core, low-pressure system that forms over tropical oceans, requiring:
These factors determine cyclone intensity and rainfall potential. Institution Mentioned: World Weather Attribution (WWA) – a global scientific network that studies the influence of climate change on specific extreme weather events. |
UPSC Prelims Practice Question
Q. Consider the following conditions required for the formation of a tropical cyclone:
- Sea surface temperatures above 26°C
- High vertical wind shear
- High humidity in the lower and middle troposphere
How many of the above statements are correct?
A. One only
B. Two only
C. All three
D. None
Answer: B (Statements 1 and 3 are correct; 2 is incorrect)
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