No article can ever just give the facts.
They have to finish with a mantra:
"But the consequences can range from serious to absolutely devastating if we continue in the business-as-usual scenario.
"It's up to us whether we do something to limit the damage."
Greenland is falling apart! 11 QUADRILLION POUNDS of water lost since 1972 and 286 BILLION TONS of ice lost since 2010 and it's getting worse Photo thearchitectureinsight.com
29
April, 2019
Since
1972, the giant island’s ice sheet has lost 11 quadrillion pounds
of water.
The
Greenland ice sheet contains enough water to fill the Great Lakes 115
times over - and it's falling apart quicker than ever.
To
get a feel of how large Greenland's ice sheet is, it's about three
times bigger than Texas, or six times bigger than Germany.
We
knew the ice was melting faster and faster - after all, just last
year, a study found that the 2012 melting was 4 times faster than in
2003. Now, another study published in PNAS adds even more context,
finding that Greenland ice melting has accelerated by 6 times since
the 1980s.
Between
1980 and 1990, Greenland lost 51 billion tons of ice - an enormous
quantity in its own right. However, in only 8 years, from 2010 to
2018, it lost 286 billion tons.
The
losses are expected to get even worse, says Eric Rignot, Ph.D., a
professor at the University of California, Irvine, and lead author of
the new study.
"Going
from a 20-year-long record to a 40-year-long record shows us a
transition from a climate dominated by natural variability to a
climate dominated by climate warming from human emissions of
greenhouse gases," Rignot says.
"Over
that time period, the mass loss increased sixfold."
We've
seen the effects of rising temperatures in Greenland before.
It's
impressive to see a big glacier calve and break away, but most of the
time, the melting is far less dramatic - a steady melt and drip over
the (still) glacial surface.
Greenland
as a whole has already experienced a warming of 2 degrees Celsius
(3.6 degrees Fahrenheit), and some areas have warmed by as much as 4
degrees Celsius, this being the main reason for the melting.
The
importance of this cannot be overstated.
If
all of the Greenland Ice Sheet melted, the sea level would rise by
about 20 feet - but that's not even the main concern.
As
ice and snow melt, they will leave room to darker soils, which will
absorb even more solar energy, further accelerating heating.
Also,
even if only a fraction of that sea level rise is achieved, the
consequences will be devastating. At this point, no matter what we
do, some melting and sea level rise is unavoidable.
But
the consequences can range from serious to absolutely devastating if
we continue in the business-as-usual scenario.
It's
up to us whether we do something to limit the damage.
"If
we do something now, it will take 30 years to affect the climate and
another few decades to turn the meltdown of glaciers, so probably
half of that signal is already written in stone," says Ringot.
"But the impact sea level will have on humanity increases with
every 10 [centimetres] of sea level rise, and right now we are about
to commit to multi-meter sea level rise in the coming century if we
don't do something drastic."
No comments:
Post a Comment
Note: only a member of this blog may post a comment.