Ik vind het ook ver gezocht, Ijsland is een soort hot spot waarvan de magmaprocessen zich diep in de mantel afspelen. Dat ijs isostatie veroorzaakt is bewezen, maar dat het smelten van dit ijs op IJsland vulkanisme zou bevorderen lijkt me fel overdreven.
Het is onderzocht, zie hier. Het lijkt niet overdreven, zo blijkt uit de conclusie:
,,In any case, our model indicates that a significant volume of additional magma, as high as 1.4 km3, could be produced every century under Vatnajo¨kull due to present day glacial retreat, suggesting that increased volcanic activity may be expected in the future.
(..)
Jellinek et al. [2004] suggest that volcanism is influenced by the growth and retreat of glaciers. The processes described here have broad relevance as global warming causes extensive world-wide ice retreat. Modification of mantle melting by ice retreat requires relative large ice caps whereas important changes in crustal stresses due to ice retreat may be more widespread at ice-capped stratovolcanoes. Areas affected may be locations such as Mount Erebus, Antarctica, the Aleutian Islands volcanoes, Alaska and the volcanic zone of southern Patagonia.''
Je kan hier het onderzoek van Jellinek et al. vinden.
Gr. Ben
