OT: One more for the deniers

Reply from: Keep Believing In Lies

Date: 14 May, 02:23

World Carbon Dioxide Levels Highest for 650,000 Years, Says US Report
By David Adam
The Guardian UK

Tuesday 13 May 2008

Rise in chief greenhouse gas worse than feared. Earth may be
losing ability to absorb CO2, say scientists.

The concentration of carbon dioxide in the atmosphere has reached
a record high, according to the latest figures, renewing fears that
climate change could begin to slide out of control.

Scientists at the Mauna Loa observatory in Hawaii say that CO2
levels in the atmosphere now stand at 387 parts per million (ppm), up
almost 40% since the industrial revolution and the highest for at
least the last 650,000 years.

The figures, published by the US National Oceanic and Atmospheric
Administration on its website, also confirm that carbon dioxide, the
chief greenhouse gas, is accumulating in the atmosphere faster than
expected. The annual mean growth rate for 2007 was 2.14ppm - the
fourth year in the last six to see an annual rise greater than 2ppm.
From 1970 to 2000, the concentration rose by about 1.5ppm each year,
but since 2000 the annual rise has leapt to an average 2.1ppm.

Scientists say the shift could indicate that the Earth is losing
its natural ability to soak up billions of tonnes of CO2 each year.
Climate models assume that about half our future emissions will be
reabsorbed by forests and oceans, but the new figures confirm this may
be too optimistic. If more of our carbon pollution stays in the
atmosphere, it means emissions will have to be cut by more than is
currently projected to prevent dangerous levels of global warming.

Martin Parry, co-chair of the Intergovernmental Panel on Climate
Change's working group on impacts, said: "Despite all the talk, the
situation is getting worse. Levels of greenhouse gases continue to
rise in the atmosphere and the rate of that rise is accelerating. We
are already seeing the impacts of climate change and the scale of
those impacts will also accelerate, until we decide to do something
about it."

Perched some 11,000ft up a volcano, the Mauna Loa observatory has
been measuring carbon dioxide in the atmosphere since 1958. It is
regarded as producing among the most reliable data sets because of its
remote location, far from any possible source of the gas that could
confuse the sensors.

Over the decades, the Mauna Loa readings, made famous in Al Gore's
documentary An Inconvenient Truth, show the CO2 level rising and
falling each year as foliage across the northern hemisphere blooms in
spring and recedes in autumn. But they also show an upward trend as
human emissions pour into the atmosphere, and each spring, the total
CO2 level creeps above the previous year's high to set a new record.

Robin Oakley, head of Greenpeace's climate change campaign, said:
"We're now witnessing a key moment in the climate change story, and
it's not good news. The last time the atmosphere was this choked with
CO2 humans were yet to evolve as a species. To even consider building
new runways and coal-fired power stations at this juncture in history
is an unpardonable folly, but Gordon Brown seems determined to stumble
forward regardless with his ill-conceived plans in the face of the
science and widespread public opposition."

A study last year suggested that the recent surge in atmospheric
CO2 levels was down to three processes: growth in the world economy,
heavy use of coal in China, and a weakening of natural "sinks",
forests, seas and soils that absorb carbon. The scientists said the
increase was 35% larger than they expected.

They said about half of the carbon surge was down to the Chinese
reliance on coal, which has forced up the carbon intensity of the
overall world economy since 2000, reversing a trend of increasing
energy efficiency since the 1970s.