Search Results for Tag: methane
Arctic melt worries UN and White House
The UN weather agency WMO (World Meteorological Organisation) has confirmed that the Arctic’s sea ice melted at a record pace in 2012, the ninth-hottest year on record. With just 3.4 million square kilometres (1.32 million square miles) during the August to September melting season, the sea ice cover was a full 18 percent less than the previous low set in 2007. The WMO’s Secretary-General Michel Jarraud said this was a “disturbing sign of climate change”, and pointed to the link between climate change and extreme weather events.
Meanwhile, a special briefing was called at the White House to discuss the possibility of the Arctic becoming ice free in the summer within just TWO years. Nafeed Ahmed, director of the “Institute for Policy Research & Development” headlines his post for the “Guardian“: “White House warned on imminent Arctic ice death spiral”. He describes the meeting, including NASA’s acting chief scientist Gale Allen, the director of the Department of Homeland Security and the Pentagon as “the latest indication that US officials are increasingly concerned about the international and domestic security implications of climate change”.
10 Arctic specialists were called in to advise the US government, including marine scientist Professor Carlos Duarte, currently director of the Oceans Institute at the University of Western Australia. I met and interviewed Prof. Duarte back in 2011 at the Arctic Frontiers conference, when he worked with the Spanish Council for Scientific Research. At that time, he was already calling for urgent action and warning of the danger of “climate tipping points”, including the melt of the Arctic sea ice. His conclusions are based on research which was presented in an article in Nature Climate Change last year.
The West Australian newspaper quotes Prof. Duarte as saying the “snowballing situation would prove as hard to slow down as a runaway train”. He told the paper the ice melt was accelerating faster than any of the models could predict, and the prospect of an Arctic Ocean free of ice had been brought forward to 2015, compared with a prediction in 2007 that at least a third of the normal sea ice extent would remain in summer in 2100. When I spoke to him in 2011, the US navy was already assuming a date of 2050 and Duarte said he expected it to be even earlier.
Prof Duarte also warned of the increasing danger of melting methane. Let me quote a little from the interview:
DUARTE: “We know from the history of ice covering the planet along geological time scales that ice is strongly a non-linear element in the earth’s system. It’s one of the components that show very rapid, very abrupt changes and tipping points. So we expect that once the ice will be lost quickly from the Arctic and also from the shelves in Greenland, then other forces will be set in motion, and many forces will be set in motion by loss of ice. One of them is the release of methane hydrates from the shallow continental shelves, mostly around Siberia, and those are molecules of methane that are trapped into ice in the sediments of the continental shelves and in the permafrost on land. So if this ice melts, this methane can be released abruptly and suddenly. And deposits of methane trapped in the shallow sediments of the Arctic amount to about five times the greenhouse power that humans have set in motion through burning fossil fuels. So if this five times what we have released in 150 years is released within a few years, that would be detrimental to the climate system and it could lead to a very rapid warming, and could again set in motion other forces like increased freshwater discharge to the Arctic, which has already increased by 30 percent. And this involves a greater export of fresh water and buoyancy to the Atlantic, which may affect global circulation and global currents, and those in turn will affect regional climates also further south to the sub-Arctic region. Also, warmer temperatures are leading to dieback of the boreal forest and also the peat deposits in the boreal region are drying up to the extent that they can catch fire.”
(IRENE QUAILE: How close are we?)
DUARTE: “We very much know what the threshold and the tipping point for the release of methanes will be, because the methane is kept in the hydrates, deposits in the salty sediments by ice, frozen sediments, and we know the freezing point of salty sediments may be around minus 1 degree. So when the temperature of water in the summer goes well above freezing point, the hydrates will defrost and the methane will be released. So what we need to monitor is the temperature of the shallow waters in the Siberian shelf and other shallow waters in the Arctic, in the Canadian region as well, and see how close they’re getting to temperatures of 3 and 4 degrees, which will be those that will lead to melting of the hydrates.”
Scary? The interview, it seems, is as relevant as ever, the Professor’s warnings more urgent. I wonder what it feels like to be called in to the White House to brief the government of a country that is both a key player in the Arctic and a top emitter of the greenhouse gases that are causing the melt? On the one hand it must be satisfying for the scientists to know they are finally being heard. But there must also be some frustration about the extent of dangerous climate change that had to be set in motion first. Has the Arctic ice already reached a “tipping point”?
Let me close with another quote from that interview with Carlos Duarte:
DUARTE: “Unfortunately society is much more mobilised by opportunities than by risks. So the discourses and warnings of risks actually almost lead to inaction by society, whereas the sight of opportunities encourages society to set themselves in motion. So the opportunities for economic growth in the Arctic have dominated the discourse and the actions by society and policy makers. Those opportunities are new navigation routes across the Arctic, and the exploitation of oil, gas and fisheries, that were not accessible just a few years ago. The paradox in this is that the Arctic countries recognise that the forces that are improving access to these resources is actually climate change and that the reason for this climate change is the burning of fossil fuels by humans. Arctic nations themselves are responsible for 26% of the release of these greenhouse gases and are taking advantage of these opportunities, which will involve greater emissions of greenhouse gases. (…) I think there should be a balance between the economic growth these opportunities could bring about and the economic losses, they may bring about, which I don’t think have been quantified.”
DateMay 6, 2013 | 1:54 pm
Permafrost “tipping point” in less than 20 years?
I have been concerned about the effect of melting permafrost on the climate for quite some time, not least in the wake of encounters with scientists working in Greenland (this picture is Zackenberg, Greenland, 2009) and Alaska. Now research results published by the National Snow and Ice Data Centre (NSDIC) in Boulder, Colorado are indicating that there could be a “tipping point” or a “starting point”, as Professor Kevin Schaefer prefers to call it, in less than 20 years. That means a point when the vast areas of permafrost in Alaska, Canada, Siberia and parts of Europe go from being a “carbon sink” to a carbon source. The study indicates as much as two-thirds of the carbon frozen into the permafrost could be released.
There’s more info on the NSIDC website and on the ips news website, based on an interview with Prof. Schaefer. Not happy reading, but without big reductions in emissions, it will probably be impossible to prevent this. On top of that come the methane emissions, not included in the study. Methane is much more powerful than CO2 as a greenhouse gas.
DateFebruary 18, 2011 | 3:12 pm
Alarming rise in Arctic methane emissions
Sound familiar? Ice-blog readers will remember methane is more than 20 times as powerful as CO2 as a greenhouse gas, and that scientists in the Arctic are measuring the extent of methane emissions from melting permafrost.
There are billions of tonnes of methane captured in the Arctic soil. As temperatures rise and the permafrost melts, more methane is released. It increases the greenhouse effect further, resulting in a “feedback loop”, with the increased warming melting more permafrost and releasing even more methane.
Zackenberg station in Greenland, which I visited this year, is one of the Arctic stations measuring methane. If you haven’t heard the programme I made including interviews with Prof. Morten Rasch, who heads the Greenland environment monitoring programme, it’s available under the “climate” banner on the right of DW’s environment page. There’s also a photo gallery with brief texts if you don’t have the time to listen to the full feature.
Climate Monitoring in Arctic Greenland
Now a study presented in the journal Nature reports a massive rise in the amount of methane being released from the Arctic permafrost.
See also today’s edition of the Guardian.
Guardian’s David Adam on rise in Arctic methane emissions
Although only 2% of global methane comes from the Arctic, the increase is highest in the Arctic, which is warming much faster than the rest of the planet.
The Guardian quotes Prof. Paul Palmer from Edinburgh University as saying the study “does not show the Arctic has passed a tipping point, but it should open people’s eyes. it shows there is a positive feedback and that higher temperatures bring higher emissions and faster warming”.
Edinburgh Climate Expert Paul Palmer
DateJanuary 15, 2010 | 8:57 am
Zackenberg Station feels more like a camp, ten blue huts and some tent-like shelters in a wide valley, with snow-topped mountains behind and the water of the Young Sound fjord below. It is equipped with everything the scientists need for their “High Arctic research”, including wet and dry labs and all sorts of electronic monitoring equipment, but it remains a camp in a very remote area. It was set up 1995-96 and officially opened in ’97. It’s still small and exclusive, for a maximum of 25 people. There are only 13 of us right now, including the two “logisticians” Phillip and “Tower” and the cook, Lone.
The dirt runway can only take the Twin Otter or helicopters. At the moment, starting mid-July, there’s a plane once a week, as this is the high season. Up to last year, there was only one a fortnight. The station is only staffed in summer, June to September, as a rule.
We newcomers had our essential safety briefing with Phillip, our logistician, first thing this morning: radio use, flare pistols and how to use a rifle (!) Phillip is clearly a man who knows how to look after himself, looks tough and wiry, always has a knife in his belt and is clearly a good shot. In his black gear, including “Zero” (Zackenberg Station Logo) T-shirt and tammy, he could belong to some crack army unit (or a James Bond film) and he gives you the impression he is not a man to be trifled with. Still, he’s very patient with a visiting journo who has never fired a weapon in her life.
No, I’m not thinking of applying for the army or even our local “Schuetzenverein” (German traditional local hunting and shooting clubs) after this, but we are advised it’s a good idea to know how to fire a flare pistol and a rifle, in case of emergency (polar bears or musk oxen, plenty of the latter around here, although so far I’ve only seen the droppings and the fluff from their coats, but then I’ve only been here a day).
I was quite surprised by this, only ever having been in places where weapons are only handed out to people with licenses and training. Things are different in Greenland. Even Lone, our new cook, had to have a go with the gun (fresh meat for the kitchen?!).
I’m sure the guys all ducked for cover when I made my attempts, and I don’t think the polar bears or musk oxen have much to worry about on my account. The weather is still incredibly good, bright sunshine around the clock and clear blue skies, fresh cool Arctic air. I headed out towards the “climate station” this afternoon (took the radio, declined the rifle), where Julie Falk from Copenhagen was trying to fix the Co2 monitor. I’m really impressed at her technical know-how.
She tells me she has no choice, in this remote location, but is frustrated about the problems of getting spare parts. We also had a look at the methane measuring station. Zackenberg came up with some headline-making results about methane emissions in the Arctic. Terrestrial wetland emissions are the largest single source of methane, a powerful greenhouse gas. The Zackenberg data provides hourly methane flux measurements from this high Arctic setting, into the late autumn and early winter, which means during the onset of soil freezing.
The scientists found out that the emissions fall to a low steady level after the growing season, but then increase significantly during the “freeze-in” period. Basically, the findings from here suggest that this could help explain the seasonal distribution of methane emissions from high latitudes, which had been puzzling scientists before. The methane is measured in glass traps which normally open and close automatically regularly and are linked to methane monitors.
Unfortunately, there’s a technical problem at the moment, but Julie was able to offload the data already logged there onto her laptop for the Zackenberg BASIC data base. More about that tomorrow, when I’ll be talking to our scientific leader Lars. If D. is reading this, remember you asked if this expedition would be very “physical”? Well so far everything here is being done on foot, with the ornithologists walking 25 km sometimes. So I think the answer is yes, and my trusty hiking boots are getting a good work-out.
DateJuly 17, 2009 | 9:01 am
A Break for the Blogger?
(Thanks to Erika Nagae, Climate Change College ambassador from the UK, for the pic).
There would be plenty of issues to comment on –
Ice shelf breaking off in the Antarctic, although it’s winter there – controversy over German government’s climate protection packages – EU gets into energy-saving light bulbs – floods and storms in different parts of the world – but your blogger is heading off to a conference at Stanford University in the USA. (Including: Energy, Climate and How Societies can/will/have to adapt to change).
That will be followed by some holidays until around July 21st.If there’s anything of interest, internet access and work withdrawal systems leading to some unscheduled blog entries in the meantime – I’ll keep you posted!
Otherwise, tune in to Living Planet
The planet’s best radio environment show?
On Thurs.July 3rd, there will be a feature on methane and climate change, the third part of the Alaska Climate Change College series.
‘Bye for now – and try to keep the air-conditioning off!
DateJune 23, 2008 | 2:48 pm