Global warming wakes volcanoes

31 Dec

wakes volcanoesPerceptibly volcanic which then reflects the sun’s rays, cooling the planet in a few years. But it turns out the opposite is happening, the periods of warming, following the period of glaciations, can lead to more frequent eruptions.

A group of geologists studying ocean bottom mud sample along the perimeter of the Pacific Ring of Fire volcano for signs of ancient eruptions. Bottom layer thicknesses in a million years of accumulation contain layers of ash from the eruption of 91. According to the location of these layers the researchers were able to determine the approximate date of each. Analyzing the frequency distribution of these ash layers, the researchers found pattern large eruption occurring every 41,000 years. This seemingly random number is actually well known pale climatology: over 41,000 years, there is a cyclic tilt of the Earth axis. This batch process – one of the three Shostakovitch cycles that affect the Earth’s climate. Since the inclination of the Earth’s axis is the reason for the change of seasons, when it reduced seasonal temperature decrease. Due to this, at high latitudes the ice accumulated over the winter, does not have time to melt in the summer, leading to periods of glaciations.

But as the ice ages may be affected by a volcano? Most directly. During such periods, the water on the planet of its weight shifts from the oceans to the surface of the continents, creating huge, to miles thick crust of ice on the surface. With the warming of the whole ice again leaves the continents. This movement is transmitted to the magma below the surface, the rapid decline of this pressure can cause emissions of magma in the form of volcanic eruptions.

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Posted by on December 31, 2012 in Global warming, Historical, Mysterious, Nature


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