Practical Evaluation Of Steady Heat Discharge From Dormant Active Volcanoes- Case Study Of Vulcarolo Fissure (Mount Etna, Italy)

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Journal Article: Practical Evaluation Of Steady Heat Discharge From Dormant Active Volcanoes- Case Study Of Vulcarolo Fissure (Mount Etna, Italy)

Abstract
From a theoretical approach combined with experimental study, I propose a method to compute both sensible and latent heat transfer in a thermally active volcanic area. This method is applied to a fumarolic thermal fissure located on the south flank on Mount Etna (Italy). The method involves four steps: (1) mapping of Self-Potential (SP) to quickly identify thermal anomalies; (2) mapping of ground temperature (T) at constant depth in the area defined by SP mapping; (3) measurement of vertical T profiles at selected representative stations including the coldest and hottest; and (4) direct measurements of vapor flow where the convective heat flux reaches the surface. When heat flux values vary in the range 10-300 W m-2, T measurements at a depth equal to about 1 m are sufficient to estimate the absolute flux value to within an absolute error less than 30%, and 10% for the relative value. Ground temperature measurement is an easy and accurate method for estimating heat discharge on a limited surface to define the fissure system, monitor time variations of heat flux, or to calibrate remote sensing results on the ground.

Author 
Maurice Aubert








Published Journal 
Journal of Volcanology and Geothermal Research, 1999





DOI 
Not Provided
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Citation

Maurice Aubert. 1999. Practical Evaluation Of Steady Heat Discharge From Dormant Active Volcanoes- Case Study Of Vulcarolo Fissure (Mount Etna, Italy). Journal of Volcanology and Geothermal Research. (!) .