Tag: GNS

It’s a gas, gas, gas

arcticmethane.jpg It’s not good news. The USA’s National Oceanic and Atmospheric Administration (NOAA) has produced its annual report on greenhouse gas levels in the atmosphere, and carbon dioxide concentration continues its accelerated growth. And there are signs that methane levels are beginning to rise, after a decade of remaining more or less static. The BBC reports:

NOAA figures show CO2 concentrations rising by 2.4 parts per million (ppm) from 2006 to 2007. By comparison, the average annual increase between 1979 and 2007 was 1.65ppm.

The methane rise is worrying because it’s a very powerful greenhouse gas (23 times as effective at trapping heat as CO2), and there are a number of positive feedbacks that could come into play as the planet warms. From the NOAA release:

Rapidly growing industrialization in Asia and rising wetland emissions in the Arctic and tropics are the most likely causes of the recent methane increase, said scientist Ed Dlugokencky from NOAA’s Earth System Research Laboratory. ”We’re on the lookout for the first sign of a methane release from thawing Arctic permafrost,” said Dlugokencky. “It’s too soon to tell whether last year’s spike in emissions includes the start of such a trend.”

Permafrost is one thing, methane hydrates are another. Sometimes called burning ice, methane hydrates (aka clathrates) are a mixture of ice and methane that exist in large quantities on the sea floor – and there are particularly large amounts in the shallow Arctic seas north of Russia and Siberia (more info at Climate Progress). At the recent European Geophysical Union conference in Vienna, a Russian scientist discussed the issue. From SpiegelOnline:

In the permafrost bottom of the 200-meter-deep sea [off the northern coast of Siberia], enormous stores of gas hydrates lie dormant in mighty frozen layers of sediment. The carbon content of the ice-and-methane mixture here is estimated at 540 billion tons. “This submarine hydrate was considered stable until now,” says the Russian biogeochemist Natalia Shakhova, currently a guest scientist at the University of Alaska in Fairbanks who is also a member of the Pacific Institute of Geography at the Russian Academy of Sciences in Vladivostok.

The permafrost has grown porous, says Shakhova, and already the shelf sea has become “a source of methane passing into the atmosphere.” The Russian scientists have estimated what might happen when this Siberian permafrost-seal thaws completely and all the stored gas escapes. They believe the methane content of the planet’s atmosphere would increase twelvefold. “The result would be catastrophic global warming,” say the scientists.

The SpeigeOnline article is worth reading in full. Shakova’s observations of methane emissions hint at an explanation for the increase in global atmospheric methane. If that’s the case – and its too early to say for sure – then we may be seeing the beginnings of one of the most worrying of the positive carbon cycle feedbacks – one that could potentially make anything we do to cut CO2 emissions the equivalent of pissing in the wind.

[Hat tip for the Spiegel piece to No Right Turn – I’m frankly amazed the EGU paper hasn’t had much more coverage in the world’s media.]

[Update for the interested: The EGU abstract for Shakhova’s paper is here [PDF]. Here’s the last few words:

“…we consider release of up to 50 Gt of predicted amount of hydrate storage as highly possible for abrupt release at any time. That may cause ~ 12-times increase of modern atmospheric methane burden with consequent catastrophic greenhouse warming.”

“Abrupt release at any time”. That’s truly alarming.]

The midweek omnibus: #37 (Putney to Peckham)

There’s been some good news, and not too much bad news. Let’s start with some good NZ news.

  • The Hillary Institute of International Leadership, launched in Antarctica a year ago with Sir Ed in attendance, has announced that “Leadership in….Climate Change Solutions will be the topic for the Institute’s first four year work-cycle, 2008-2012.” The Institute will appoint annual Hillary Laureates who will give public lectures in the US and NZ (the first in Christchurch in June), and a major award, to be called the Hillary Step, in 2012. There will be substantial cash awards – they’re aiming for $1 million by 2012. Good interview on Radio Nz National earlier this week (scroll to 18:46) with an Institute spokesman. Meanwhile Helen Clark won an United Nations Environment Programme (UNEP) Champions of the Earth award, which recognises individuals from each region of the world who have shown “extraordinary” leadership on environmental issues. The cynic in me comments that if wishes (and good words) were horses, she’d be riding a virtual Melbourne Cup winner. Unfortunately, in the real world she’s stuck on My Little Pony.
  • Christchurch Airport has achieved carbon neutrality through Landcare Research’s CarbonZero programme, making it the second in the world to do so (behind one in Sweden). Good marketing, at the very least, though it would be better if the international tourists arriving were as well offset.
  • Mass market electric vehicles take a step closer with announcement of a deal between Project Better Place, Renault-Nissan and the Israeli government. “The Israeli government would provide tax incentives to customers, Renault would supply the electric vehicles, and Project Better Place would construct and operate an Electric Recharge Grid across the entire country. Electric vehicles will be available for customers in 2011.” According to the launch press release, the scheme will use an “innovative business model” where drivers will not have own a battery, but will subscribe to the service on the basis of kilometers driven. This (and the tax incentives) will presumably keep the cost of the cars down. Over to Meridian… (Hat-tip: Joe Romm at Climate Progress). Meanwhile, Tesla are promising to (finally) deliver the first of their electric sportscars in March.
  • The EU has announced its climate plan, designed to reduce European emissions by 20% by 2020 [Economist, New Scientist, Guardian], and there will undoubtedly be a lot of fighting over how individual countries targets have been allocated. Meanwhile, the US has warned the EU not to use climate policy as a trade barrier, and the EU has warned the US that if it has no climate policy its products will face tariffs.
  • Technology Review has more on the Australian hybrid battery being successfully tested, and the BBC had a reporter on the Beluga as it began its transatlantic voyage to test the SkySail kite system.
  • Gar Lipow has made the full text of his book No Hair Shirt Solutions to Global Warming available as a free download [PDF]. I’m looking forward to reading it.
  • The BBC has done a couple of good pieces on king tides in Tuvalu and sea level rise, and The Economist finds encouraging signs of the success of eco-labelling (especially of sustainably harvested fish).
  • More wind farms on the way: Meridian has announced it intends to proceed with a 31 turbine installation in Wellington’s Ohariu valley – the $420 million Makara development. Meanwhile the Herald prints poet Brian Turner’s thoughts on the impact of wind farms on the NZ landscape. I don’t necessarily agree with his take on wind energy, but it’s hard to disagree with his conclusion: “Our oft-warbled claims to be ahead of the game and clean and green are no more than self-congratulatory chitter. Sort out what you think our legacy ought to be, people, and stand up for it before it’s too late.”
  • Finally, Weather Channel senior meteorologist Stu Ostro continues his analysis of weather developments in the northern hemisphere, and how they could be (or already are) are sign of the impact of rapid climate change. Well worth a read if you are in the slightest weather literate, and worrying for those who are. And lest we relax, scientists at the University of Colorado at Boulder report that the ice cap on Baffin Island in the far north of Canada has reduced in size by at least half over the last 50 years.

Going up

How much will sea level rise over this century? “Don’t know” is a good answer. “Not much” is looking like a bad answer that’s getting worse by the month. Last week a group of Northland Conservation Corps workers rode on a hikoi along Ninety Mile Beach to draw attention to the issue:

Tutor Mike Wikitera and his team erected five signs marking predicted sea level rises by 2030. The group, who rode horses to avoid adding to greenhouse gas emissions, erected the first sign at Shipwrecks Bay and placed the last one at Waipapakauri beach on October 30.

But what are the “likely levels” by 2030? The IPCC’s latest report projects between 18cm and 59cm by the end of the century, but only by excluding a very big unknown – how much ice will melt in Greenland and Antarctica. As more evidence of dramatic melt in Greenland arrives, it’s getting increasingly difficult to rule out multi metre rises. The latest number comes from Professor David Vaughan of the British Antarctic Survey, quoted in the Daily Telegraph [UK]:

Prof Vaughan says the main message is not to panic – the effects of melting will be gradual, in the order of three metres per century if the evidence of the past 20,000 years is anything to go by.

Three metres per century? That’s towards the top end of current speculation. 30cm every ten years, ten times the current rate, compares with 17cm over the last century. Prof Vaughan’s right about panic. It’s not a good option, but extreme concern is certainly justified. For some dramatic pictures of what might happen, check out this Greenpeace report on climate change impacts on Spain, timed to coincide with the IPCC meeting in Valencia to ratify the AR4 synthesis report. To see what 3m might mean for NZ, go here and zoom in on your favourite bit of beachfront property. NIWA’s current advice to local government is to allow for 50cm by 2100. That’s in need of considerable upward revision.

Meanwhile, the impact of sea level rise is not just high tides and wet feet. Salt water intrusion into fresh water coastal aquifers can be bad news for agriculture and drinking water – and the problem may be worse than previously thought, according a new study reported by Science Daily. The BBC covers one of the areas at most risk – Bangladesh – in a new series, documenting a boat journey through the country.

Clearing the decks

A few quick links before I post on the government’s just announced energy strategy: cleaning out the tabs in my web browser…

  • Professor Graham Harris of the University of Tasmania addresses the issues I raised in my “ecological overdraft” post a few days ago, in Sleepwalking Into Danger – an article for ScienceAlert: “It is time to admit how little we know and face the risks of planetary degradation – this goes way beyond climate change. Biodiversity isn’t just birds, primates and whales; it is planetary function and resilience.”
  • The Royal Society For The Protection Of Birds is planning [Guardian, BBC] to allow the sea to reclaim 728 hectares of coastal land in the Essex marshes on Britain’s east coast to restore habitat for wildlife – and as a pragmatic adaptation to rising sea levels. Could we see the same sort of thing here?
  • The Andrill project – a sea floor drilling effort under the Ross Ice Shelf involving NZ and US scientists – is using nifty Apple computers, so Apple has posted an interesting perspective on the work being done. New drilling season starts soon.
  • Brian Fallow in the Herald takes a look at the cost of carbon in the new ETS and speculates about ongoing impacts on the government’s accounts.
  • Carbon emissions from shipping may be much higher than previously thought, according to The Independent (UK).
  • German solar power company Conergy is planning a 500 turbine windfarm near Broken Hill in New South Wales. Meanwhile, BusinessWeek (US) profiles entrepreneur John O’Donnell, who has bought into Aussie scientist David Mills solar thermal designs, and plans to build a lot of generation at costs competitive with coal. With Silicon Valley money, and soon.
  • The Dominion Post digs up some advice to government on dealing with “environmental refugees”. NZ will probably want to help small Pacific nations, but refugees from the Asian megadeltas might be another matter.