Monday, December 9, 2013

Scientists Baffled By Lack Of Sunspots

Scientists Baffled By Lack Of Sunspots

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Something is up with the sun.
Scientists say that solar activity is stranger than in a century or more, with the sun producing barely half the number of sunspots as expected and its magnetic poles oddly out of sync.
The sun generates immense magnetic fields as it spins. Sunspots—often broader in diameter than Earth—mark areas of intense magnetic force that brew disruptive solar storms. These storms may abruptly lash their charged particles across millions of miles of space toward Earth, where they can short-circuit satellites, smother cellular signals or damage electrical systems.
Based on historical records, astronomers say the sun this fall ought to be nearing the explosive climax of its app
Approximate 11-year cycle of activity—the so-called solar maximum. But this peak is “a total punk,” said Jonathan Cirtain, who works at the National Aeronautics and Space Administration as project scientist for the Japanese satellite Hinode, which maps solar magnetic fields.
“I would say it is the weakest in 200 years,” said David Hathaway, head of the solar physics group at NASA’s Marshall Space Flight Center in Huntsville, Ala.
Researchers are puzzled. They can’t tell if the lull is temporary or the onset of a decades-long decline, which might ease global warming a bit by altering the sun’s brightness or the wavelengths of its light.
“There is no scientist alive who has seen a solar cycle as weak as this one,” said AndrĂ©s Munoz-Jaramillo, who studies the solar-magnetic cycle at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass.

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