The Climate Show #29: if the sun don’t come, you get a tan from standing in the English rain

This week The Climate Show brings you an all news special. We have wet summers for Europe, permafrost warming delivering a methane kick, La Niña driving floods that make sea level fall, a glacier calving in Antarctica, mammoths and sabre tooth tigers — all delivered with Glenn and Gareth’s inimitable panache (!).

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Deep Water

We know that sea level rise is an inevitable consequence of the global warming that our continued burning of fossil fuels is causing. What we don’t know is how much to expect and how soon to expect it. Journalist Daniel Grossman in his Kindle Single Deep Water: As Polar Ice Melts, Scientists Debate How High Our Oceans Will Rise explores the momentous issue by looking at the work of three scientists who study the past history of elevated sea levels to get a better understanding of what is likely ahead for humanity. Grossman writes from a close acquaintance with climate science and his ability to distil the science in readily understandable form for the general reader is outstanding.

Paul Hearty, “talented and cantankerous”, is a geologist who has argued from his studies of inter-glacial periods that if the Earth warms by two degrees the huge glaciers in Greenland and Antarctica could substantially melt in a short space of time. His field work in the Bahamas and Bermuda, which he regards as a relatively stable region geologically, has led him to the conclusion that in the warm interglacial 400,000 years ago (Stage 11) sea level rose by as much as around 19 metres. Paleoclimatologist Maureen Raymo doesn’t share that view but it was Hearty she invited in 2009 to collaborate in field work with her in Western Australia seeking evidence of sea level rise in the Pliocene. Grossman travelled with them as journalist and gives a lively account of the expedition.

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The Climate Show #27: Aussie hockeysticks, cherry pies and electric planes

It’s a first! Glenn, Gareth and John manage to record a show that clocks in at under an hour — but it’s still packed with interesting stuff. We’ve got news about a new Australasian hockey stick — a paleoclimate reconstruction that demonstrates that the last three decades are the warmest in the last 1,000 years, a look under an Antarctic ice shelf, more methane research, and good news from Greenland. John Cook from Skeptical Science looks at the misuse of temperature records from the Sargasso Sea, and we look at electric planes and boats and the latest version of the solar “leaf”. And… Glenn announces his imminent move to the UK, but never fear, the show will go on — just as soon as he sets up his computer in London (which might be a couple of months).

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NZ ETS to be watered down (again), but emissions news good

New Zealand’s new Minister for Climate Change Issues and chief climate negotiator, Tim Groser, yesterday announced the government’s intended changes to the Emissions Trading Scheme following last years ETS Review. There will be a limited period for consultation (to May 11) on the proposals before legislation is put before Parliament. The consultation document (PDF) and meeting dates are available here. Key points:

  • Agriculture’s entry to the ETS may be delayed beyond 2015.
  • There will be no increase to the $25/tonne unit price cap.
  • The “two for one” transitional provision for big emitters will be phased out more gradually.
  • The government will give itself powers to auction emissions units.
  • There will be a review of the allocation of carbon credits to pre-1990 forests to take into account the changes to the forestry regime agreed in Durban last year.

Groser also announced the release today of New Zealand’s net emissions position for the 2008-12 Kyoto reporting period, now expected to be a surplus (that is, under NZ’s target) of 23.1 million tonnes, up from 21.9 mt in 2011.

News that agriculture may continue to escape carbon constraints is hardly surprising, given the government’s reluctance to annoy its heartland farming and agribusiness supporters, but it appears willing to risk confrontation with Maori forestry interests on pre-1990 carbon credit allocations. My view is that this tinkering around the edges of the scheme is designed to put the ETS into a kind of domestic political holding pattern until the shape of future international arrangements begins to emerge. Groser doesn’t want to frighten the horses until he absolutely has to, as this quote from Brian Fallow’s piece in the NZ Herald today might be taken to indicate:

Preferences for changing areas of the policy would vary a lot depending on what assumptions were made about the future carbon price, Groser said.

“If you think it will remain at the current low levels, you will reach one set of conclusions. Take a different view of the trajectory of the carbon price – and above all, this is a long game we are playing – and you may reach quite different conclusions.”

Getting international action on emissions reductions is certainly turning out to be a long game. We can only hope that it doesn’t turn into the diplomatic equivalent of a timeless test, and that the climate system is kind enough to give us time to play it. I’d not want to bet on either proposition.

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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