WASHINGTON: The Arctic is warmer the past six years than at any time on
record, with more green shrubs, less sea ice and rising
temperatures in the frozen earth known as permafrost, scientists reported.
However, there are signs that some parts of the Arctic environment are returning
to levels of lower temperatures seen in the
mid-20th century, the researchers said.
Moving away from anecdotal accounts of starving polar bears and increasing
numbers of forest fires, an international team of
researchers found that conditions in the Arctic varied regionally, but generally
showed an unprecedented warming.
"This is a region that is fighting back ... and consequently there are some
things that show signs of going back to earlier climatological
norms, what we saw from 1950 through 1980," said Jacqueline Richter-Menge of the
Cold Regions Research and Engineering
Laboratory in Hanover, New Hampshire.
James Overland of the US National Oceanic and Atmospheric Administration, said:
"For the last six years, Arctic temperatures
were above their average and this is a unique situation compared to the 20th
century data that we have.
"So we're in a new situation, and this result is also supported by the loss of
sea ice that's going on in the Arctic," Overland said at a
news conference, speaking along with Richter-Menge and others.
The indicators that are "fighting back," as Richter-Menge said, include parts of
the central Arctic Ocean and some wind patterns that
have begun to seem more like what they were before an abrupt warming occurred in
the 1990s.
Other indicators show a trend toward warmth. For example, the extent of sea ice
keeps decreasing, with September 2005 showing
the least amount of Arctic summer sea ice since satellite observation started in
1979. Winter sea ice levels were at their minimum in
March 2006, the report said.
The Arctic tundra turned green, mostly due to an abundance of shrubs, the
scientists found, but at the same time forest vegetation
was less green, possibly because of drought.
Permafrost temperatures continued to climb, the report said, though data on how
thick the permafrost is were less conclusive.
*Source: Times of India, dated - Sunday,
November 19, 2006.*