전 세계에 터지는 재난 시한폭탄 [이슈 픽 쌤과 함께] | KBS 261025 방송

Summary

The program examines increasingly severe climate-related disasters and explains how global warming can intensify extreme weather and destabilize mountain environments.

Heatwaves and wildfires

Europe experienced record heat, with the program citing surface temperatures of up to 55°C in parts of Spain and France, as well as high readings in Madrid and Rome. It reports heat-related deaths and major fires in Spain.

Canada’s severe wildfire season produced smoke that traveled into the United States, reaching cities including New York, Philadelphia, and Washington, D.C. Intense fires can also generate fire clouds—cloud-like formations created by the heat and rising air from a wildfire.

Why fires can intensify

Warming in northern regions melts snow and ice that would otherwise reflect sunlight. Exposed ground absorbs more heat and dries out, making vegetation and soil more prone to severe burning. The program also notes that land is warming faster than the ocean.

Heat domes and contrasting extremes

A heat dome occurs when a high-pressure system traps hot air over an area, allowing temperatures to build. The United States experienced extreme heat while parts of Texas were hit by heavy rain and flooding, illustrating how very different climate extremes can occur in the same country at the same time.

Glaciers, permafrost, and a sudden flood in Nepal

The program describes a destructive flood that arrived with little warning and was not caused by local rainfall. It explains the following terms:

• Perennial snow: Snow that remains year-round, including in high mountains.
• Glacier: A large mass of compacted ice that slowly flows downhill under its own weight.
• Sea ice: Frozen seawater, distinct from ice that forms on land.
• Permafrost: Ground that remains frozen for at least two years.

How warming can trigger a glacial-lake outburst flood

Meltwater can enter cracks in a glacier and reduce friction at its base, speeding its movement and widening cracks. Meanwhile, thawing permafrost weakens the frozen ground that helps support slopes.

A collapse or landslide can block a river, creating a lake. If the blockage then gives way, stored water can rush downstream as a flash flood. Unlike a gradual flood, a flash flood can arrive so quickly that evacuation time is extremely limited. The program warns that expanding glacial lakes could make such events more frequent or severe.

Researchers and sources featured

• NASA: A satellite image dated July 15 was shown to illustrate wildfire locations and smoke.
• No individual researchers or other named sources are identified in the subtitles.