Ice melt, sea level rise and superstorms: Hansen on his magnum opus

Why ice sheets may melt faster than expected, and what that could mean for our near future

In this video Jim Hansen provides a “video abstract” of his latest — and longest — paper, Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous, published this week after a lengthy period in review. He, and his stellar list of co-authors, have also provided an “abbrievated” version of the paper, which I strongly recommend you read.

My abstract is a bit shorter: fresh water from melting ice sheets in Greenland and Antarctica is beginning to change the way that heat moves around in the global ocean, setting up feedbacks that will melt the ice faster. This in turn will lead to much more rapid sea level rise than suggested in the recent IPCC report, and much bigger temperature contrasts between warm and cold oceans in the North Atlantic and around West Antarctica — which will drive the mid-latitude superstorms of the paper’s title.

Not a pretty prospect. And if you think it’s unlikely, consider this. There are already “cold blobs” in the North Atlantic and off West Antarctica, Atlantic storms are becoming much more vigorous , and there are hints of an acceleration in the rate of sea level rise.

Hansen has been right before. I hope, for all our sakes, that this time he’s not.

February’s global temperature spike is a wake-up call

This is the largest warm anomaly of any month since records began in 1880.

This article, by Steve Sherwood, of UNSW Australia and Stefan Rahmstorf, of the Potsdam Institute for Climate Impact Research, currently working in Australia, first appeared at The Conversation.

Global temperatures for February showed a disturbing and unprecedented upward spike. It was 1.35℃ warmer than the average February during the usual baseline period of 1951-1980, according to NASA data.

This is the largest warm anomaly of any month since records began in 1880. It far exceeds the records set in 2014 and again in 2015 (the first year when the 1℃ mark was breached).

In the same month, Arctic sea ice cover reached its lowest February value ever recorded. And last year carbon dioxide concentration in our atmosphere increased by more than 3 parts per million, another record.

What is going on? Are we facing a climate emergency?
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Amid NZ coal mine closures, layoffs, do we need two new mines?

Cross-posted from Coal Action Network Aotearoa

Last week was a bad week for coal mines on the West Coast.

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Work on the Denniston Plateau has now stopped.

Early in the week Solid Energy announced 24 workers would lose their jobs from the Stockton mine, and by the end of the week Bathurst announced that it is putting the Denniston mine on hold, laying off 12 workers – terrible news for those workers and their families.

At the heart of this is the same issue that sent Solid Energy under: plummeting coking coal prices – a price that has continued to fall, and was again cited as the reason for Solid’s new layoffs.

Over on the Denniston Plateau, Bathurst’s woes have stemmed, in the first instance, from the long-signalled closure of the Holcim plant in Westport, its biggest client. Bathurst has had to seek domestic buyers for its high grade coking coal, because of the low international price.

Continue reading “Amid NZ coal mine closures, layoffs, do we need two new mines?”

Fixing the NZ Emissions Trading Scheme is just flogging the dead horse

How fast shall we drive over the cliffSimon Johnson looks at ‘fix the ETS’ metaphors and argues that trying to incrementally ‘save’ or ‘fix’ the NZ Emissions Trading Scheme will ensure it remains ineffective in reducing domestic emissions for decades. Politically, its just flogging the dead horse. We don’t have time for a unending institutionalised cultural conflict over ‘fixing the NZETS’ like the one we have had for ‘fixing’ the Resource Management Act.

In my last post I used the metaphor or framing of ‘arguing over the gears while accelerating towards a cliff’ for the latest review of the New Zealand Emissions Trading Scheme.

Other commentators are using a very different framing for the review; that of ‘fixing the NZETS’. For me that raises some fundamental questions. What are the political advantages and disadvantages of the two framings? Where will each framing lead us? Which framing is more ‘science-informed’?

Continue reading “Fixing the NZ Emissions Trading Scheme is just flogging the dead horse”