Arctic Sea Ice Underestimated for Weeks Due to Faulty Sensor
By Alex Morales
Feb. 20 (Bloomberg) -- A glitch in satellite sensors caused scientists to underestimate the extent of Arctic sea ice by 500,000 square kilometers
(193,000 square miles), a California- size area, the U.S. National Snow and Ice Data Center said.
The error, due to a problem called “sensor drift,” began in earl More..y January and caused a slowly growing underestimation of sea ice extent
until mid-February. That’s when “puzzled readers” alerted the NSIDC about data showing ice-covered areas as stretches of open ocean, the
Boulder, Colorado-based group said on its Web site.
“Sensor drift, although infrequent, does occasionally occur and it is one of the things that we account for during quality- control measures prior
to archiving the data,” the center said. “Although we believe that data prior to early January are reliable, we will conduct a full quality
The extent of Arctic sea ice is seen as a key measure of how rising temperatures are affecting the Earth. The cap retreated in 2007 to its lowest
extent ever and last year posted its second- lowest annual minimum at the end of the yearly melt season. The recent error doesn’t change findings
that Arctic ice is retreating, the NSIDC said.
The center said real-time data on sea ice is always less reliable than archived numbers because full checks haven’t yet been carried out. Historical
data is checked across other sources, it said.
The NSIDC uses Department of Defense satellites to obtain its Arctic sea ice data rather than more accurate National Aeronautics and Space
Administration equipment. That’s because the defense satellites have a longer period of historical data, enabling scientists to draw conclusions
about long-term ice melt, the center said.
“There is a balance between being as accurate as possible at any given moment and being as consistent as possible through long time-periods,”
NSIDC said. “Our main scientific focus is on the long-term changes in Arctic sea ice.”
See? All of the morons that claim the ice is melting have just been shot out of the water. NO ICE MELTING AND HENCE....NO GLOBAL WARMING.