Ash Temperature variations on Mount Wrangell, Alaska

Abstract
Rapid large scale temperature variations, up to 40°C within 24 hours, have been observed under the floor of a volcanically heated building on Mount Wrangell, Alaska. The temperature increases correlate well with decreases in barometric pressure. A mechanism explaining this relationship is based on Elder's steaming ground model. A decrease in barometric pressure increases the vapour pressure gradient in the soil above the water table. This increases the vapour flux which in turn increases the heat flux.

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