Showing posts with label Earth. Show all posts
Showing posts with label Earth. Show all posts
Monday, March 31, 2014
Wednesday, March 19, 2014
Thursday, February 27, 2014
Sunday, January 19, 2014
Thursday, November 22, 2012
Thursday, September 1, 2011
Sunday, February 7, 2010
North Magnetic Pole Moving Due to Core Flux
for National Geographic News
December 24, 2009
Earth's north magnetic pole is racing toward Russia at almost 40 miles (64 kilometers) a year due to magnetic changes in the planet's core, new research says.
The core is too deep for scientists to directly detect its magnetic field. But researchers can infer the field's movements by tracking how Earth's magnetic field has been changing at the surface and in space.
Now, newly analyzed data suggest that there's a region of rapidly changing magnetism on the core's surface, possibly being created by a mysterious "plume" of magnetism arising from deeper in the core.
And it's this region that could be pulling the magnetic pole away from its long-time location in northern Canada, said Arnaud Chulliat, a geophysicist at the Institut de Physique du Globe de Paris in France.
The core is too deep for scientists to directly detect its magnetic field. But researchers can infer the field's movements by tracking how Earth's magnetic field has been changing at the surface and in space.
Now, newly analyzed data suggest that there's a region of rapidly changing magnetism on the core's surface, possibly being created by a mysterious "plume" of magnetism arising from deeper in the core.
And it's this region that could be pulling the magnetic pole away from its long-time location in northern Canada, said Arnaud Chulliat, a geophysicist at the Institut de Physique du Globe de Paris in France.
Monday, June 29, 2009
Will Earth Become a Planet Without Ice Caps? Leading Expert Says "Yes"Rising sea levels will not extinguish humanity, but they will transform life on planet Earth as we know it according to Peter Ward professor of biology and earth sciences at the University of Washington. Here are his predictions in a new book, The Flooded Earth, which will be published this July.
By 2050: Sea levels will rise 0.5 to 1 meter. Well established coastal cities will battle the rising waters with dikes and levees; other cities will see their underground infrastructure impaired and face building collapse.
By 2300: The seas will rise 20 meters reshaping the world's geography, forming new rivers and lakes as Antarctica's ice melts. Massive icebergs will form in the southern hemisphere interrupting historic shipping lanes.
2500-3000: the sea will reach its maximum levels completely wiping out coastal cities and forcing massive human and animal migration. Greenland and Antarctica will be transformed into prime farmlands. In southern regions will face the spread of tropical diseases and the possibility of mass extinctions.
Image above: Red represents areas where temperatures have increased the most during the last 50 years, particularly in West Antarctica, while dark blue represents areas with a lesser degree of warming. Temperature changes are measured in degrees Celsius. Credit: NASA/GSFC Scientific Visualization Studio.
Article by Casey Kazan
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