Author: Bryan Walker

Hansen’s letter on lignite

At the suggestion of Slovenian colleagues, James Hansen has written to the President and members of the National Assembly of the Republic of Slovenia urging them to deny a state guarantee for a proposed European Investment Bank loan to fund a new lignite-fired power plant in their country.

He points out that they are considering a decision which will have significant effects, some irreversible, upon the world that today’s young people and future generations inherit. Such a strong statement, he says, however unlikely it may seem at first glance, is a clear conclusion of the most advanced climate science. That science he proceeds to summarise in his letter, and to describe in more detail in an attached paper The Case for Avoiding Dangerous Climate Change to Protect Young People and Nature.

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Ignoring the future? Sea level rise and NZ’s planning guidelines

A question-time exchange in the New Zealand Parliament a few days ago seemed worth drawing to the attention of Hot Topic’s readers. Green MP Kennedy Graham (pictured) put this question to the Minister for Climate Change Issues:

Is he concerned by a recent report of an international team of scientists that, even with a two degree Celsius rise in average global temperature, future generations could face sea levels of up to 12 to 22 metres higher than at present?

Kate Wilkinson, the Minister of Conservation, replied on behalf of the Minister for Climate Change Issues:

Yes. The estimates of sea level rise in this report are in line with estimates from the science community over the past few years. But I note that the author himself puts these estimates in context by stating that such changes could take centuries or millennia and that “The current trajectory for the 21st century global rise of sea level is 2 to 3 feet …”.

Graham’s follow-up question pointed out that the current Government guidelines for councils for sea level rise for 2100 are lower than the level estimated by scientists and asked whether the need for correction would be admitted.

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A blast from the past (if we knew now what we knew then)

Peter Sinclair’s recent Climate Denial Crock of the Week is fascinating viewing. He has unearthed a video of a talk given by climate scientist Mike McCracken thirty years ago and asks him in a recent interview what he would say differently today.

Very little has changed. The younger McCracken:

“CO2 probably has been very high in past geologic terms but certainly not in past historic times, and so we’re really doing a giant experiment and the question is what is the outcome going to be?”

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Words matter: a politician tells the truth

“The land we call our home, the land owned by this sweet funny brave people is being transformed, as is the rest of the planet. And yes, since the late eighties I have been an unapologetic believer in the grim reality that human activity is changing the earth’s climate.”

These words were spoken by the new Australian Foreign Minister, Bob Carr, in the course of his first speech to the Australian senate last week. I felt a twinge of envy as I tried to imagine a New Zealand Minister in any portfolio, let alone Foreign Affairs, speaking with such directness and entirely appropriate emphasis.  “Grim reality” is exactly the right description, and one from which, once uttered, there is no easy evasion.

Carr well understands the basic science of global warming and the history of its development, as is evident in a video clip of a lecture he gave in 2008 in which he called climate change deniers “the present danger”. In his Senate speech he also made clear that his concern includes the oceans:

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Unstoppable waves of innovation in the Waikato?

A pleasant surprise this morning to see across the front page of the Waikato Times the headline “Waikato’s plan to harvest sunlight”.  The article reports that lines company WEL Networks has been evaluating photovoltaic cells and is now investigating the feasibility of solar power production in the Waikato region.

Commercial viability is the determining factor. It’s the dramatic fall in the cost of photovoltaic cells which has caused WEL Network’s investigation. CEO Julian Elder said that the low price of the cells, compared with where they were a few months ago, made solar power stations affordable in New Zealand. He said that in the space of a few months the return on investment had gone from about half a century to under 10 years.

We are looking at the whole range, from 1-2 kilowatt units on a house, up to the thousands of kilowatts for a large-scale pilot,” Dr Elder said.

He said it was not a case of if they built such power stations but a matter of when.

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