Author: Bryan Walker

Pure Advantage’s strong central message

Simon Johnson, in his recent Hot Topic post, challenged the failure of Pure Advantage’s  report New Zealand’s Position in the Green Race to highlight the importance of putting a price on carbon, and Duncan Stewart offered a robust response. It’s not my purpose in this post to pursue that topic, but rather to dwell on the strong central message of the document — that New Zealand has a much brighter economic future as a green growth economy than as one stuck with the fossil fuel dependance we remain reluctant to address. The report considers government action is necessary to drive the change, but at the same time sadly recognises that the government is currently stuck in a different and inadequate strategy which is hindering advance.

Just how much we are failing to measure up to our proclaimed green image is revealed in the sobering reality check the report performs on various economic fronts.

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A Pathway to Sustainable Energy

“Will we look into the eyes of our children and confess that we had the opportunity, but lacked the courage? That we had the technology, but lacked the vision?” These words preface the report Energy [R]evolution 2012: A Sustainable World Energy Outlook published this month by Greenpeace, the European Renewable Energy Council and the Global Wind Energy Council.  It’s the fourth edition in a series which began in 2007. The publication is book length and over its pages describes a renewable energy scenario which sees CO2 emissions fall 85% from 1990 levels by 2050. I thought it well worth drawing attention to.

The authors can hardly be accused of utopian dreams. The technology exists to access stores of renewable energy far larger than the world’s energy requirements. The publication describes in careful and comprehensive detail an achievable programme of transition which would leave no need for the world’s fossil fuel resources to be pursued to the point of exhaustion or anywhere near it.  Carbon capture and storage is not part of the scenario, for reasons of cost and uncertainty; nor is nuclear energy, which, for reasons of cost, safety and inability to reduce emissions by a large enough amount, is marked for phase-out.

The reduction of demand through energy efficiency, the “sleeping giant” which offers the most cost-effective way to reform the energy sector, is a vital element in the transition. Over and over again surveys and analyses are making this clear, and the report is very much in line with an increasingly common theme in the literature.  High levels of projected energy demand diminish dramatically when energy efficiency is given high priority. The document shows the effect of best practice in various sectors of the economy.

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Communicating science across cultural divides

A recent study in Nature Climate Change by Dan Kahan and others has attracted interest for its findings on public apathy over climate change.  It’s not incomprehension of the science that is the problem, the article finds, but the strong influence of the cultural environment and philosophical inclination of individuals, predisposing them to downplay the science even when they are well-equipped to understand it.  It’s not my purpose in this post to communicate the substance of the study – there’s a very good short piece in the Economist which will do that for you – but I want to offer some reflection on its conclusions.

The claim that there are severe limits to the effectiveness of relying on simple communication of the science is not a new one. Social scientists have been declaring for some time that cultural and economic perceptions are what prevent the climate message from making headway in significant sectors of the community. This paper is further confirmation.

I don’t think there is any message here for climate scientists. They do science. Their work is to understand what is happening to the biosphere as greenhouse gas emissions continue to mount and to try to work out what it portends for the future. If some of the public say they don’t believe it, or they don’t believe it’s as serious as the science suggests, then there’s little  more scientists can do than to reiterate that it’s real and it’s serious and to keep adducing the evidence  which  leads them  to that conclusion. The evidence is mounting. There is nothing in sight to suggest the science has got it wrong.

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Another Antarctic ice shelf at risk of melt

In the last episode of the Climate Show Gareth drew attention (at 13:40)  to two recent papers suggesting that the Weddell Sea area of the West Antarctic Ice Sheet may be more vulnerable to warming than previously realised. One paper, published in Nature Geoscience, recorded that radar mapping has uncovered a deep sub-glacial basin close to the edge of the ice sheet at the head of the Filchner-Ronne ice shelf. The basin measures 100 by 200 km and is well below sea level, nearly 2km deep in places. The ice sheet, currently grounded above the deep basin, may be more unstable than previously thought and could quickly undergo ice loss.

In a related paper, published in Nature, models reveal that the Weddell Sea region may experience warmer ocean conditions at the end of the 21st century, which could provide the trigger for ice sheet change. Professor Martin Siegert of the University of Edinburgh, who led the project, said:

“This is a significant discovery in a region of Antarctica that at present we know little about. The area is on the brink of change, but it is impossible to predict what the impact of this change might be without further work enabling better understanding of how the West Antarctic Ice Sheet behaves.”

I’ve been reading an interesting collection of expert opinion on the second paper, made available by the New Zealand Science Media Centre (SMC) ; it was gathered by the Canadian SMC.  The seven experts who commented all thought the paper worthy of respect, and together provided a sense of the breadth and liveliness of scientific interest in the behaviour of the ice shelves.  I thought Hot Topic readers might be interested to get the flavour of the comments.

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20 years on, NZ’s Rio response inadequate: WWF

PandalogoThe WWF report this week on how New Zealand has handled its responsibilities since the first Earth Summit 20 years ago is damning on the matter of greenhouse gas emissions. We have failed to measure up to our undertakings given back in 1992 and again in 2002. New Zealand signed up to the United Nations Framework Convention on Climate Change on the first day of the that Rio meeting, and subsequently ratified it. We committed in Article 4 to:

“Adopt national policies and take corresponding measures on the mitigation of climate change, by limiting its anthropogenic emissions of greenhouse gases and protecting and enhancing its greenhouse gas sinks and reservoirs. These policies and measures will demonstrate that developed countries are taking the lead.”

The WWF report points out that nothing happened here for the next fourteen years and the country’s greenhouse gas emissions continued to increase. They flattened off after 2007, but that was mainly due to a major drought affecting agriculture and then the subsequent recession. The report considers the Emissions Trading Scheme enacted in 2008 and weakened in 2009 has had limited impact on emissions.

We have clearly failed to set emissions on a downward trajectory.

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