Category: Climate politics

NZ ETS, you are the weakest (international) link

Simon Johnson (Mr February) argues that the New Zealand Emissions Trading Scheme (NZETS) is “the weakest link” due to its high exposure to the international carbon market. The strong “international linkage” is the other side of the coin of the uncapped design of the NZETS. Both features reinforce just how ineffective the NZETS is in providing an incentive to reduce greenhouse gas emissions.

Who remembers the The Weakest Link? The quiz show with Anne Robinson the disciplinarian female host with the popular catchphrase “You are the weakest link. Goodbye!” Yes that’s today’s bonkers metaphor for another post on the NZETS. In addition to the observation that I would love to say “Goodbye!” to the ETS, there really is a relevant connection to the economics literature.

“Linking” of emissions trading schemes means that units from one ETS can be imported and surrendered by emitters regulated by a different ETS. There are papers and blog posts about international linkage. The key economic benefit claimed for linking two or more ETS, assuming that they are otherwise sensibly designed, is that the lowest-cost ways of reducing emissions within the linked schemes become available (via emissions trading) to the emitters of the linked schemes.

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Fairfax and Stuff.co.nz: presenting propaganda as opinion and lies as fact

This morning the Sydney Morning Herald published an opinion piece by well-known Aussie climate denier David Evans, and later in the day the Fairfax New Zealand news web site Stuff.co.nz decided to feature the Evans article in their science section. Two small problems for Fairfax: Evans “opinion” piece is nothing more than propaganda masquerading as opinion, and contains straightforward lies about our understanding of climate.

We last met Evans back in April, when he unleashed on an unsuspecting world a risible political analysis of those who want action on climate change. Even so, the SMH, for reasons best known to themselves, chose to let him loose on their pages to present a “scientific” argument. The problem? Evans scientific understanding is as weak — if not weaker — than his political analysis. His deliberate misrepresentation of the state of scientific understanding of the climate system renders his “opinion” on the matter worthless, and calls the editorial judgement of the SMH and Stuff.co.nz into question.

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Kerry Emanuel: the role of reason

The reign of climate change denial in the US Republican Party is an extraordinary spectacle, hard to credit in an educated modern democracy. It’s also a very sad spectacle in view of the prominent role the US plays in contributing to climate change and the potential leading role it could play in mitigating it. I often wonder what members of the party who take science seriously and understand climate change make of the phenomenon. A recent podcast interview with noted atmospheric scientist Kerry Emanuel, a former registered Republican, indicates that for him at least it has meant becoming an Independent of conservative inclination.

Emanuel was a keynote speaker last year at a New Hampshire conference run during the Republican primaries by a group of Republican voters upset by their party’s anti-science rhetoric. As a result he was subjected to a torrent of particularly nasty hate mail, as reported on Mother Jones.

The interview I’m reporting in this post was conducted by Chris Mooney, author of The Republican Brain. On the science Emanuel says the kind of things we hear from many climate scientists. But it’s always worth being reminded that such statements represent a very wide body of scientific opinion. I’ve picked out a couple of examples from the interview.

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McKibben: naming the enemy

“It has become a rogue industry, reckless like no other force on Earth. It is Public Enemy Number One to the survival of our planetary civilization.”  These are the words Bill McKibben uses to describe the fossil-fuel industry in a recent striking article in Rolling Stone which has received wide attention. It’s well worth reading, not least for the elegant lucidity of its prose. This post is not intended as some kind of summary, but rather as a reflection on McKibben’s notion that we need to recognise that we are up against a formidable enemy.  He moves to this declaration by considering three numbers.

The first is 2o Celsius, the level of warming which is widely accepted politically as not to be exceeded. Scientifically it can’t be regarded as a safe level of warming, and it’s certainly not so regarded by McKibben, but ”political realism bested scientific data, and the world settled on the two-degree target”.

The second number is 565 gigatons, which is the amount of carbon dioxide scientists estimate can still be added to the atmosphere by mid-century and give us a reasonable (80%) hope of staying below two degrees.

The third number is 2,795 gigatons, which is the amount of carbon already contained in the proven coal and oil and gas reserves of the fossil-fuel companies, and the countries that act like fossil-fuel companies. “In short, it’s the fossil fuel we’re currently planning to burn.” And it’s five times more than we can burn and have any hope of staying within two degrees of warming.

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Jim Renwick on the state of climate science

I have been listening to a lecture by Victoria University climate scientist, James Renwick, who has recently moved to the university from his post as principal climate scientist at NIWA.  In the seminar he sets out in broad terms some of the latest developments in the science. It’s a very clear summation, with some recent interesting graphs and charts, showing the direction which in which climate change is continuing to move. Needless to say there’s no change in direction apparent. I recommend the lecture as well worth listening to. I’ll only touch lightly in this post on the scientific content of the lecture; my main purpose is to highlight comments Renwick made along the way indicating the concern he feels about where we are headed.

I was particularly struck by an early statement made after he had remarked on the 2011 emissions reaching a record level of 31.6Gt and pointed to the graph of steadily increasing concentration of CO2 measured at Mauna Loa. I’ve transcribed it: Continue reading “Jim Renwick on the state of climate science”