Science · 6 pages · 12 min
Why hurricanes weaken over land
Over land a hurricane loses the ocean's moist heat and meets rougher ground, so the winds fall.
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From the opening
Hurricanes weaken over land because they lose the warm ocean that had been feeding heat and moisture into the storm, and because the rougher land surface drags on the wind. The vortex can keep turning for a while, and it is no longer being fed the way it was at sea. The opening covers the warm ocean is the heat source, land adds friction and cuts evaporation, and rain can outlast the peak wind.
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Inside
- The warm ocean is the heat source
- Land adds friction and cuts evaporation
- Rain can outlast the peak wind
- A return to warm water can restrengthen
- Where the idea stops applying
- A distinction worth keeping
Sources
- The hurricane as a warm-ocean heat engine
- Surface friction and loss of moist enthalpy over land