Gone for good: Arctic Ocean ice free all year by the 2040s?

A few days ago I used a combination of Arctic sea ice volume data from the University of Washington’s PIOMAS model and NSIDC sea ice extent numbers to project that the Arctic Ocean would be effectively ice-free in late summer within ten years. The key to that exercise was the rate at which the volume of sea ice has been declining — 350 km3 per year over the last 30 years for the full dataset, 410 km3 per year over the last 20, and 740 km3 over the last decade at summer minimum. The rate of volume decline has obviously been increasing. Using those numbers to project ice extent in the future is one thing, but they also tell us something interesting about the overall Arctic heat budget — and we can use that to make a rough guess about when the Arctic will become ice-free year round. The answer is surprising…

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From Smoke to Mirrors

Kevin Cudby doesn’t rush to easy conclusions in his new book From Smoke to Mirrors: How New Zealand can replace fossil liquid fuels with locally-made renewable energy by 2040. He is clear that fossil fuels must be eliminated but seeks to be realistic about how that can be done. The focus on New Zealand is not exclusive; however, he considers that New Zealand can provide an example which many others will want to learn from and follow. There’s also an economic imperative that we be able to show those who holiday here or buy our products that they are not thereby exacerbating climate change. Cudby envisages a society continuing to have the transport opportunities we currently enjoy and depend on, but fuelled differently. He fully accepts the warnings of climate science, taking James Hansen as a guide in that respect.

The book painstakingly leads the reader through a wide variety of technologies relevant to its search.  Battery vehicles receive close and sympathetic attention but are seen as unlikely to be sufficiently developed to be widely used in NZ road transport before 2040, though they may well make sense for some transport businesses. In discussing hydraulic hybrid (rare as yet) and plug-in battery hybrid vehicles he notes that their low fuel consumption will cancel out rising fuel prices. Hydraulic hybrids should have proved by 2020 whether they can deliver what the promoters promise; he certainly sees them becoming common on machines such a ditch diggers. Hydrogen fuel cell vehicles show much promise, and he sees a future for them in New Zealand, though not in significant numbers before 2040.  The discussion of these differently powered vehicles is illuminating in its detail, with very useful explanations of how they work and what problems have yet to be overcome in each case.

Liquid fuels will continue to play a major part in NZ transport by 2040, in the author’s view. They will also remain essential in non-road equipment and vehicles, which Cudby frequently reminds the reader are substantial users of fuel. It will not be enough to eliminate fossil fuels from road transport. Air and sea travel must also be fuelled from non-fossil sources. At this point in his book the Biomass Gasification and Fischer-Tropsch (BGFT) process enters the scene. It yields synthetic crude oil that can be converted into diesel, kerosene, fuel oil, and petrol. BGFT fuels directly replace conventional liquid fuels. They work best with dry biomass. They are expected to be commercialised by 2015, and although they will be more expensive than conventional fossil fuels their use should not affect transport costs because improved vehicle efficiency will offset the higher cost. Cudby estimates that to provide sufficient biomass to satisfy its entire liquid fuel requirements with BGFT synthetic fuels New Zealand would need purpose-grown energy forests covering between nine percent (low scenario) and thirteen percent (high scenario) of its total land area. Excluding from consideration native forests and conservation areas, as well as arable or high quality pastoral land, he finds that between 29 percent (low scenario) and 40 percent (high scenario) of steep low quality land would suffice for the energy forests. I was reminded of the report in 2006 of the Energy Panel of the Royal Society of New Zealand 2020: Energy Opportunities which envisaged a rapid transition to carbon-neutral transport fuel and produced an analysis which demonstrated that New Zealand can easily grow the required biomass without impinging on productive soils.

The book also considers the Hydrothermal Liquefaction (HTL) process, a likely useful complement to BGFT because it copes well with wet biomass and is a promising candidate for converting microalgae into liquid fuels as he notes NZ company Solray Energy is demonstrating. Algae biofuel receives attention but Cudby sees it as not yet ready for commercial-scale stand-alone fuel production. Biodiesel, which he differentiates from synthetic diesel such as BGFT or HTL, is not an option for running the NZ transport system but could fulfil a very useful niche role as a lubricity additive to synthetic diesel. Ethanol will have a role, but for the present its high cost and inferior environmental performance compared with synthetic hydrocarbons tells against it.

This general outline does little justice to the detailed coverage Cudby gives to all these and many related topics as he outlines the options for transport and non-road liquid fuel use. The technically inclined reader will be well engaged. As the author proceeds to his assessment of the options he acknowledges that the world’s transport systems will eventually depend on solar fuels, hydrogen, batteries, or perhaps algal biofuels. However for now none of them are competitive with conventional vehicles fuelled by synthetic biofuels. While we wait to see which technologies will ultimately succeed we should get on with the decarbonising of our supply of liquid fuels. He proposes opening renewable energy facilities at 18-month intervals beginning in 2018. The first six factories would make hydrocarbon liquid fuels. Thereafter it would depend on how world technologies are developing. The products of the first factories would certainly be needed during a 20-year investment life of the factories.  Energy forests have a twenty-five year rotation and he looks to an acceleration of the process in the first stages by using some existing forests for energy, by planting trees close together and harvesting them sooner, and by using unwanted pine trees, gorse and other scrubby weeds.

There are two distinct stages to the transition. The first is replacing the essential hydrocarbon fuels, that is, non-road petrol and diesel, aviation kerosene, and fuel oil. The second is carbon-neutralising road transport, which may involve the vehicles as well as the fuels and perhaps include a mix of different technologies.

It can be done by 2040 but in Cudby’s view it won’t happen as a result of carbon pricing schemes, whether by emissions trading or a direct tax. Energy companies will continue to pursue the enormous potential for liquid fuels made from natural gas, tar sands, heavy oil, oil shale, coal, and methane clathrates. We must therefore progressively ban imported fossil fuel as we develop our biomass synthetic fuel, and while we are about it ban indigenous fossil fuels as well.

“…the only foolproof way to eliminate fossil fuels is to outlaw them”. This is an eminently sensible thing to say, especially when the writer has set out in considerable and thoughtful detail how they can be replaced. But as I read this section of the book I tried to imagine our Minister of Energy engaging with it and failed. In fact he is doing precisely what Cudby says the energy companies will continue to do, pursuing fossil oil to its last drop, holding out a promising future for coal and expressing hope that methane clathrates can be tapped.

Full marks to Cudby and others like him for a thorough and patient exploration of the means by which we can end our reliance on fossil fuels. His vision of New Zealand showing the way, able to demonstrate renewable fuel in almost every type of vehicle even invented, is not bombast but technically grounded.  “What are we waiting for?” are his final words. To which I fear the answer is political leadership intelligent enough to understand the danger of climate change and resolute enough to take a lead in tackling it. And voters ready for such leadership. Technologically, if Cudby is right, we are ready, but politically is another matter.

Five years (threnody for Arctic sea ice)

Earlier this month the US National Snow & Ice Data Center issued its analysis of this year’s Arctic sea ice minimum — at 4.60 million km2 on September 19, the third lowest extent in the satellite record. However extent (defined here) doesn’t tell you everything about the state of the ice — according to the University of Washington’s PIOMAS ice model 2010 managed to set a new record low for sea ice volume.

In terms of the future of the Arctic sea ice, the volume of ice remaining at minimum is a crucial metric because it represents the size of the heat budget buffer between an ocean with a perennial floating ice cap and one that’s seasonally ice-free. For the Arctic to be ice free in summer, that buffer has to disappear, or become a lot smaller. I’ve been writing about sea ice volume for some time, and considered the overall Arctic heat budget in this post a couple of years ago, so news of the new low volume prompted me to think about what it might mean for the extent metric over the next few years. To do that, I downloaded the NSIDC’s September monthly average extent for the last 21 years, and plotted that against the PIOMAS model’s September average monthly volume (kindly supplied by Jinlun Zhang). Here’s what the data looks like when you plot it on the same chart.

SeaIceData.png

The red line at the bottom, labelled “thickness”, is what you get when you divide volume by extent, and that too has been in decline, reflecting the fact that the loss of volume has been happening faster than the reductions in extent.

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I’ve been wrong before

It appears that the crank pantheon has a new hero: John O’Sullivan — the “world’s most popular Internet writer on the greenhouse gas theory” and the man unafraid of getting everything wrong. The last time we encountered him, he was getting everything wrong about the New Zealand Climate “Science” Coalition’s attempt to take NIWA to court. In his latest piece — Royal Society Humiliated by Global Warming Basic Math Error — he’s getting everything wrong about CO2 and, surprise, his piece is being touted round the crank echo chamber — Delingpole’s blogged it, Morano’s linked to it, and poor old Treadgold’s repeated it verbatim. According to O’Sullivan, an article by an obscure Canadian scientist proves that:

Top international experts prove British numbers on carbon dioxide are wrong. Royal Society blunder grossly exaggerates climate impact.

Oh really?

No.

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Waving, not drowning (yet)

I found myself hesitating over reporting a further attempt on the part of Oxfam to draw attention to the increasing plight of populations in poorer countries faced with the early effects of climate change. In this case it is Oxfam New Zealand’s Wave of Change campaign, highlighting climate impacts in the Pacific region.

Why was I hesitating?  Fear of overdoing a theme? Recognition that there is not absolute scientific certainty that a particular event can be attributed to climate change? Caution about compassion fatigue? Foreseeing reactions from some that this is just another begging strategy devised by the pesky poor? A general feeling of hopelessness about the likelihood of rich nations taking a sustained interest in the plight of others, even when their responsibility for that plight is established? Not wanting to be seen as a bleeding heart liberal?

 

All these elements, and others, were discernible when I interrogated myself. None of them justified ignoring the Oxfam news release sitting in my inbox.  All the more when I read George Monbiot’s latest Guardian article. His argument is more generally political than climate change related, and I don’t propose discussing it here in those wider terms. But his conclusion was entirely relevant to this post:

“People with strong intrinsic values must cease to be embarrassed by them. We should argue for the policies we want not on the grounds of expediency but on the grounds that they are empathetic and kind; and against others on the grounds that they are selfish and cruel. In asserting our values we become the change we want to see.”

So let me write briefly about the Wave of Change campaign. It’s timed as the Cancun conference comes into view.  There appears to be some slight hope that Cancun will see advance on the transfer of finance and technology from developed countries to help developing countries adapt to climate change. Oxfam intends that New Zealand politicians and negotiators are well aware of the seriousness of the need of our Pacific Island neighbours in this respect. The declaration opening the short video on their website:

“People of the Pacific are among those to be hit first and worst by climate change.”

This isn’t just about the future danger of islands disappearing as a result of sea level rise, as Oxfam’s Coordinator Anne-Marie Mujica pointed out when launching the campaign:

“Right now people are struggling with salt poisoning their staple food crops and polluting their drinking water.”

A Pacific Conference of Churches spokesperson underlines this when he  speaks on the video of the increase in the severity and frequency of extreme weather patterns.

“Salt water is now seeping into the food crops and the drinking water. Tropical storms are more fierce.”

One woman puts it simply:

“Seawater is coming. Every high tide I have water in my front yard.”

The campaign seeks a fair deal. Two Pacific Islanders on the video say it:

“Our Pacific urgently requires a fair deal on climate change.”

“We need to protect our Pacific regions. We need to speak out loud and clear for a fair and ambitious deal on climate change.”

Fair deal is the right note to strike since issues of justice are clearly involved when the effects of  emissions are felt by those least responsible for them.   One woman speaker says:

“Climate change is not just about science; climate change is about human rights.”

These are island voices. People alarmed by what they see happening where they live and asking for attention and fair treatment. Auckland is the most appropriate city in the developed world for their voice to be raised loud and clear.

Awareness-raising events taking place around Auckland this week are detailed on this Facebook page.

One of the campaign activities suggested is writing to the NZ Prime Minister. He should be open to the plea. New Zealand has signed up to the Copenhagen Accord and consequently no doubt expects to make a proportionate contribution to the funding targets outlined in that Accord to assist developing countries adapt to and mitigate climate change.

Last word to Oxfam’s Mujica:

“New Zealand may be a small country, but we’re a big player in the international climate talks. Our negotiators lead, or are members of, important working groups. It’s time to show the government that its citizens want them to do more to protect our Pacific.”