How air can move the earth
Nature Geoscience
2009년11월2일
Tides in the atmosphere ― working much like ocean tides ― can trigger an episode of movement in an ongoing landslide. The study, published online this week in Nature Geoscience, found that episodic sliding of land near Slumgullion pass in Colorado, USA, tends to occur during the daily atmospheric low tide.
William Schulz and colleagues compared hourly measurements of the slip speed of the landslide over nine months with equally frequent observations of local atmospheric pressure. The scientists found a significant correlation between both time series. The effect could be caused by an upward movement of air and water molecules in the soil during periods of low atmospheric pressure, which reduces the friction that usually holds the landslide in place.
The researchers suggest that atmospheric pressure could trigger other geological phenomena that involve sliding surfaces, such as earthquakes, volcanic eruptions and glacier movement.
doi: 10.1038/ngeo659
리서치 하이라이트
-
6월18일
Climate change: Cleaner fuels may reduce impact of aviation on climate warmingCommunications Earth＆Environment
-
6월17일
Environment: Flow interrupted for more than half of the world’s riversNature
-
6월17일
Astronomy: ‘Great Dimming’ of Betelgeuse caused by dust veilNature
-
6월16일
Environment: EU agricultural imports vulnerable to future climate changeNature Communications
-
6월15일
Climate change: Tailored online messaging shifts Republican voters' understanding of climate changeNature Climate Change
-
6월11일
Ecology: Coral reefs could stop net growth by mid-21st centuryCommunications Earth＆Environment
