Icelandic Volcanoes – Climate Change in Proportion

Climate Change is not completely wrong. It simply exaggerates the impact rising temperatures, the greenhouse effect on those changes and then ability of human beings to change that.

An (extreme) example is the attempt to link the frequency of volcanic eruptions in Iceland due to the thinning ice caps.

This proposition is “As the ice melts the rock can melt because the pressure decreases,”

Wattsupwiththat try to put this in perspective through a two-step process.

1. Estimate the change in rock temperature melt point as the pressure decreases. This is estimated at 0.0013°C per metre of ice, so the disappearance of the entire 500m thick ice sheet would decrease the melting point of the magma beneath by around 0.5°C, or less than 0.05%. The actual loss is estimated at 10%.

2. In terms  of pressure, 500m of ice is equivalent to 20m or less of rock. However, volcanic eruptions are caused by magma rising to the surface from many kilometres down. 20m of rock is hardly significant in this.

However, the current problem of steam/ash clouds is caused by the magma being rapidly cooled by the ice. So without glaciers we would not have the current problem of planes being grounded.

What is important is the lack of perspective that the researchers have shown.  

Using a research

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