Abstract
The heat output of the subglacial geothermal area at Grimsvotn is estimated from the total volume of water in jokulhlaups which originate from the caldera. Variations in heat output are presented for the last 125 yr. An average or base heat flux derived by this method is in agreement with a former estimate obtained by a mass balance study of the glacier and has been explained by the heat extraction of water penetrating into hot rock boundaries of magma.The estimated total inflow of magma into the Grimsvotn area equals the average annual rate at which magma has been erupted to the surface of Iceland. The heat energy removed by volcanic eruptions is an order of magnitude less than the heat removed by hydrothermal convection. -from Author
| Original language | English |
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| Pages (from-to) | 13-18 |
| Number of pages | 6 |
| Journal | Jokull |
| Volume | 33 |
| Publication status | Published - 1983 |