Change And Entire Landscapes On The Move
By Stephen Leahy
07 October, 2007
Inter Press Service
- The hot breath of global warming has now touched some of the coldest
northern regions of world, turning the frozen landscape into mush as
temperatures soar 15 degrees C. above normal.
Entire hillsides, sometimes
more than a kilometre long, simply let go and slid like a vast green
carpet into valleys and rivers on Melville Island in Canada’s
northwest Arctic region of Nunavut this summer, says Scott Lamoureux
of Queens University in Canada and leader of one the of International
Polar Year projects.
“The entire landscape
is on the move, it was very difficult to find any slopes that were unaltered,”
said Lamoureux, who led a scientific expedition to the remote and uninhabited
The topography and ecology
of Melville Island is rapidly being rearranged by climate change.
“Every day it looked
different,” he told IPS. “This is a permanent change.”
Normally Melville Island’s
42,500 sq kms are locked in sea ice all year round, as it is part of
the high region that has been relatively unaffected by the dramatic
declines in Arctic sea ice over the past decade. Until this year, that
is. This summer, southern parts of the island were free of sea ice,
Lamoureux told IPS. He has led expeditions to the island every year
On land at Mould Bay on the
island’s northwest side, his research team measured record-shattering
temperatures of between 15 to 22 degrees C in July. Until then, the
normal July average temperature had been between 4 and 5 degrees C.
The extraordinary heat thawed
the tundra permafrost — permanently frozen ground — to depths
of more than a metre, he said. At that depth, there is mostly ice and
when it melts, it destabilises the thin, top layer of plants and soil
that has patiently built up over thousands of years.
Enormous amounts of water
and sediments are being discharged into rivers, lakes and oceans. Studies
are underway to determine the impact on birds, fish, musk oxen and other
creatures that live there in the summer. Given the extent of the changes,
there is little doubt there will be significant ecological impacts,
The record low level of sea
ice in the entire Arctic Ocean will also change regional and even global
weather patterns. Much more snow will fall in the Arctic due to the
increased moisture from the increased amounts of open water. All that
water is also dark and heat-absorbing instead of sunlight-reflecting
ice, so the region gets warmer, melting more ice in what is a strong
positive feedback loop.
Other parts of the Arctic
region have already changed dramatically in the past 50 years.
“There are trees and
lawns in Nome (Alaska) now,” said Patricia Cochran, chair of the
Inuit Circumpolar Council.
“I never thought I’d
see trees growing on the tundra,” Cochran said about her hometown,
which lies on the Bering Sea and was once too cold for trees to grow.
“Beavers are overrunning
the area now that there is food for them. They are even in Barrow, north
of the Arctic Circle,” she told IPS from her office in Anchorage.
The tundra is also melting,
resulting in coffins disturbingly popping out of the ground in graveyards,
roads crumbling and giant sink holes opening up everywhere, including
in some towns, she said.
Every summer brings plants,
animals, birds and insects that no one has seen before. Dragonflies
and turtles now roam the lands that had been too icy for tens of thousands
“Everyone living here
has seen the changes,” Cochran said.
And there are more changes
to come even if politicians and corporate CEOs stop pretending to act
and actually curb emissions of greenhouse gases.
“The Arctic Ocean will
be ice free in the summer, it’s just a matter of how soon,”
said Andrew Weaver, a climatologist at the School of Earth and Ocean
Sciences in the University of Victoria, Canada.
A new study led by the U.S.
National Aeronautics and Space Administration this week revealed that
the Arctic’s thick, year-round sea ice cover declined 2.6 million
square kilometres beyond the summer average minimum since satellites
started measurements in 1979. That’s about the size of the province
“That decline is nothing
short of stunning,” Weaver told IPS.
It’s also a permanent
decline because while the ice will re-form over the six-month-long winter
when there is no sunlight, it will be much thinner and likely to melt
quickly next summer, he said.
Because Arctic sea ice is
floating, the melting will not affect sea levels but it will “wreak
absolute havoc on Arctic ecosystems”.
The rapid meltdown is pushing
the upper end of the climate experts’ projections, he said, noting
that new research shows that change in the Arctic could happen abruptly.
In other words, the worst case scenarios and beyond may come to pass.
They may even be on their way right now.
Oil and gas exploration may
one day reach remote Meville Island if there’s a summer ice-free
path because of the extensive natural gas and oil reserves there, said
Burning such fossil fuels
is the major reason why the Arctic is losing ice. Scientists and native
people note that it would be more than ironic should those emissions
facilitate the extraction of even more fossil fuels with which to further
warm our overheating global greenhouse.
© 2007 Inter Press Service
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