Wednesday, 8 June 2011

Earth is melting and in Europe

Until recently it was assumed that the inner core of all its parts to be cooled and therefore gradually increasing. The latest findings suggest that it did not seem quite right.

The inner core of Earth is melting, and this, of course, reflects on the surface. Scientists hope that studying the aforementioned findings, to figure out how deep into the planet's magnetic field is created.

The heart of the "blue marble" as astronomers sometimes described, and only in the form of balls, stretches 2,400 kilometers in diameter, corresponding to approximately the size of the moon. By encircling the outer core layer that is predominantly made ​​up of a sort alloy of iron and nickel in the liquid state, which surrounds slurry layer. The latter relies on strong crust (crust rather, bearing in mind the overall size of the planet) or surface, composed of dozens of continental (tectonic) plate.

Sloppily outer core cools and hardens, making the interior of each year increase by about a millimeter.

But now it has been established and at the same time dissolves. Why?

Until recently it was assumed that the interior in all its parts cool down, that is, in general, and therefore gradually increasing. It appears this is not exactly true, because in certain areas of the inner core melt, seismologist warns Sebastian Rost of the University of Leeds (United Kingdom).

In other words, the swelling of the heat inside the cover ensures that the overall structure of the outer core hardens, allowing the scope grows, but it is not equal flow.

On cooling the Earth's interior, rather warm and cold material, carried by unusual natural conveyor belt, spills around, and this phenomenon is called convection. Stirred the masses in the core, in conjunction with the rotation of the planet, creating a magnetic field.

Using a computer emulation (model), combined with the seismic data, the researchers found that the heat flow on the boundary of the core and the mantle depends on the latter. When the mantle heat go back to the core, at that point it melts. But only a small part of the surface of the inner core can be melted at a time.

If this is compared with the overall size, even if it melts just a percentage of land area, it turns out 200,000 square kilometers!

In cases where that occurs under the Africa or the Pacific Ocean, where the lowest layer warmer than average, the outer core is more than enough heat to start melting the interior. On the other hand, under trusnih areas along the so-called. fire zone (with frequent earthquakes and volcanoes) - which almost surrounds the largest open water on the planet - remains chilled ocean plate, inserted into the lower layers of the mantle, suck a lot of heat from the core of nurturing him to chill.

In a way, all events (schedule) in the Earth's core are associated with tectonic plates, which is quite obviously based on surface observations, said geophysicist John Maund from the same institution of higher education.

Can you clarify that certain seismic irregularities (anomalies) that indicate that a very thick liquid layer surrounding the inner core?

Sure, and further explains why the seismic waves caused by earthquakes travel faster through one, and slower in other parts of the nucleus. Bearing in mind that the origin of Earth's magnetic field mystery to scientists, it is expected that now made ​​a major step in understanding how it works in the core.

And the latest findings in the area remain uncertain , because it is not clear how the measured heat kernel releases . Not all of conjuring up the computer, in fact, confirmed by melting, and any attempt to cause that, in natural circumstances, it is unworkable.

Does the core melts and under Europe?


Protects life

Earth's core acts like a giant magnet, creating a huge magnetic field that surrounds the planet and protect the living world of shock waves and the harmful rays of our parent star. National Aerospace and Space Administration (NASA) has revealed that almost magnetosphere looks when viewed from space.

The view is based on data collected from the very beginning so. space age, the period of human history started sending the first artificial satellite (October 4, 1957). Although the propagation of magnetic lines are not visible to the naked eye, can be measured using sensitive timers (sensors), which counted atomic particles - charged protons and electrons that orbit around our planet.

On the front of the magnetosphere is flattened and elongated in the back, because it is exposed to strong gusts of solar wind. And that the flow is very fast particles that carry a magnetic footprint of our stars.

As the ozone layer, the magnetosphere is essential for our survival, because the deadly solar radiation and hot plasma declines in the surrounding cosmic space.

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