[scroll down for AMEG news release]
What is happening in the Arctic is what Peter Wadhams, myself and others in AMEG have been dreading – that our deductions from the physics of the Arctic sea ice situation have come true. We also understand some of the dreadful repercussions from a sea ice collapse, which nobody has wanted to believe. But it is also like a cloud lifted, because now we can tell the world that we’ve been right all along. The sea ice extent was bound to start collapsing within the next year or two, because the thickness was decreasing steadily. Now it’s happened. Now people will have to face up to the repercussions. Now people can realise that our only choice, if we want to avoid decent into a hellish nightmare, is to geo-engineer like mad – use all the measures and techniques at our disposal that we can deploy immediately or at least before next summer’s melt, in the hope of trying to prevent further collapse.
We have left action awfully late. The first sea ice collapse in 2007 should have prepared us for further collapse in the following years. The physics is elementary. It was not put in the climate models, which have continued to forecast that the sea ice would last for decades. The Hadley Centre models were predicting end century demise. This is what is cemented into IPCC AR4 on which all climate negotiations are based. These models have now proved rubbish. Yet it was the chief scientist at the Met Office, Prof Julia Slingo, ultimately responsible for the Hadley models, who rubbished the PIOMAS data on sea ice volume, saying that her models would prove Wadhams and AMEG wrong. This is on public record, because she gave this as evidence to the Environment Audit Committee hearing on “Protecting the Arctic”.
But far more serious than the denial of physics and the laws of nature was the denial of the precautionary principle – if our concerns about sea ice loss and repercussions (particularly a methane excursion) had even a small probability of proving correct, it would have been sensible to prepare for the worst by developing the geoengineering techniques that could provide enough cooling power to avoid a sea ice collapse. The cost would have been minimal in relation to the cost of trying to deal with repercussions – which some of us fear could be the end of civilisation. But nothing happened, so no geoengineering has been prepared.
AMEG has had a predicament – a dilemma. If we say how bad the situation really is, people will brand us as doom-mongers and not want to listen. If we don’t, then nobody will learn the truth.
But now it’s different. Our predictions on the sea ice have proved correct. We have the credibility. Our timescales are appropriate. (Only the other day a student wrote an article for the Ecologist saying that, after consulting experts at UEA, he was convinced that AMEG had got its timescales wrong.)
The most visible repercussions of sea ice decline and rapid Arctic warming (it’s warming five or six times the global average by my reckoning, and that ratio will leap up as the sea ice disappears) are the escalating emissions of methane, now seen to be bubbling in vast plumes from the East Siberian Arctic Shelf seabed, and the global weirding, seen to be affecting farmers all over the world as the Arctic warms, polar jet stream meanders more, sticking in places to cause weather extremes, long periods of both hot dry weather and cool wet weather. These two repercussions have been AMEG’s focus of late, see press release.
Never in the history of the human race has there been so much danger to confront. We have the brains – we should have the intelligence – to deal with it. Psychologically we have real problems, continuing to believe that we are immortal and “it can’t happen to us”. It is.
Best wishes,
John
Chair, AMEG
www.ameg.me
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ARCTIC SEA ICE CRASHES: GLOBAL FOOD AND METHANE FEEDBACK EMERGENCY - AMEG WARNS ACTION NOW IMPERATIVE
AMEG press release, 1st September 2012
The record low Arctic sea ice extent, reached in the past few days, shows that a collapse
in the sea ice is underway, and the minimum to be reached in a few weeks, could be
as much as a million square kilometres below the September 2007 and 2011 minima
(which were almost the same). AMEG has repeatedly warned that this could happen,
raising the issue in their submission to the UK Environment Audit Committee (EAC)
hearing on “Protecting the Arctic”, on Hansard record. The complete collapse of sea ice,
till practically none is left for at least one day of the year, is now likely by 2015. The
extreme danger lies in the repercussions of the sea ice loss, especially those resulting
from seabed methane emissions and from altered jet stream behaviour – the latter already
being experienced with extremes of drought and floods in different parts of the northern
hemisphere. However AMEG is confident that a crisis can be averted if immediate
action is taken to cool the Arctic, but this will inevitably involve a degree of intervention
known as geoengineering because of the large cooling power required. Preparations
need to start straightaway for deployment of the best candidate techniques, with a view to
rapid deployment, hopefully in time to head off a worse collapse of sea ice next summer.
The repeated warnings about the sea ice by AMEG sea ice experts (including Professor
Peter Wadhams of Cambridge University) have been ignored or scorned as doom-
mongering by climate scientists, who claim that the sea ice will last for decades. So the
current collapse may come as a nasty surprise to many people. However the collapse
could have been expected from observed trends, particularly of sea ice volume. The
Arctic has been warming, sea ice has retreated leaving open water in summer, and the
relentless Arctic summer sun has warmed the water to produce further thinning of the
ice. Each year, come the minimum ice extent at the end of summer, the thickness and
volume of the ice has been less. The trend reaches zero volume before September 2015,
by which time the extent must obviously have collapsed.
The AMEG warning on methane emissions has also been ignored or scorned by climate
scientists, who claim that the emissions will be too slow to have an appreciable global
warming effect this century. However AMEG has been advised by Russian scientists,
Natalia Shakhova and Igor Semiletov, that escalating emissions from the East Siberian
Arctic Shelf seabed pose a threat of abrupt climate change, as the protective and
insulating cover of the sea ice disappears. There is so much methane stored under the
seabed that only one percent release of this potent greenhouse gas, e.g. as a result of a
large earthquake or rapid seabed heating, could cause intolerable global warming.
AMEG has recently warned of increased climate extremes and a global food crisis that
will deepen as the Arctic warms. This year’s severe drought in the US is not an isolated
event; much of the world has been afflicted by extreme weather in one form or another,
with floods and droughts impacting agriculture. Such extremes have been on the increase.
Recent research by scientists, such as Dr Jennifer Francis of Rutgers University, shows
convincing evidence that this increase is related to dramatic warming of the Arctic and
changing polar jet stream behaviour.
Droughts and floods have been gradually increasing in intensity for a great many years,
as the IPCC AR4 report (2007) predicted would occur with global warming. However
the Arctic is warming faster than the rest of the planet. This has weakened the jet stream,
increasing the frequency and duration of warm/dry spells and cool/wet spells, and thereby
making matters much worse. This year we have seen widespread crop failures and a rise
in food prices*. Unless emergency measures are immediately taken to cool the Arctic and
restore the sea ice, one can expect an ever worsening food crisis in years to come, with
the prospect of famine on a biblical scale.
There are other serious repercussions of sea ice disappearance and Arctic warming, such
as a disintegration of the Greenland Ice Sheet to cause massive sea level rise. But AMEG
has chosen to focus on methane escalation and the food crisis because they can be seen to
be already under way, with apocalyptic results if Arctic warming continues unabated.
AMEG’s conclusion is that we have a planetary emergency as a result of the downward
spiral of sea ice. Only by grasping the nettle and applying geoengineering with great
determination, as in a war effort, do we have a chance of remedying the situation before it
is too late. International collaboration to fight this common “enemy” of Arctic meltdown
must bring all nations together, simply in the cause of survival.
* Severe Droughts Drive Food Prices Higher, Threatening the Poor - World Bank |
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