Solid Treadgold, easy action (NZ still warming fast)

It’s time to return to the delusions harboured by New Zealand’s little coterie of climate cranks about the NZ temperature record. Readers may recall that — somehow — the men who lost a court case against NIWA and then folded the charitable trust they’d used to bring the case in order to avoid paying costs, managed to get their “reconstruction” of the NZ temperature record through peer review and into the scientific literature. To no-one’s surprise, they found that warming in NZ was only one third of that found by NIWA and a generation of NZ climatologists. To do that, they had to torture the data beyond endurance, as I showed at the time.

Equally unsurprising is that Richard Treadgold, prime mover of the whole fiasco, felt moved to respond in a number of typically prolix posts at his blog. His first, What Mullan actually says, purports to lay out the disputed points:

…I think these are the debating points he’s trying to make, lined up with the passages in which he makes them.

One small problem. This is not a debate. The facts are what the facts are, just as the temperature data is what it is. No amount of handwaving — or appeals to judicial authority — can change the facts of this matter. What can change is the interpretation placed on those facts, and that’s where Treadgold et al went wrong on day one.

In 2010 they decided — and explicitly told the world — that NZ’s climate scientists had been cooking the books. Everything they’ve done since has been a part of building a false narrative, a silly superstructure of misinterpretation and misdirection clumsily bolted together, designed to fool anyone sympathetic to their position. The new paper, by de Freitas, Dedekind & Brill 2014 (dFDB 2014) is just the latest effort to prop up that tottering edifice.

I have no intention of wasting time by playing along with Treadgold et al’s narrative. There are so many misdirections and misunderstandings on display in his sequence of posts that it would take a magnum opus to deal with them all. If I thought that by doing that I might change their minds — win them over to the world of climate rationality — then I would be happy to do it, but Treadgold et al are not what I would describe as rational actors. They admit no facts that are inconvenient to their world view, and show no sign of educability on climate science.

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NZ cranks finally publish an NZ temperature series – but their paper’s stuffed with errors

You can’t teach old dogs new tricks, it seems — certainly not if they’re gnawing a much loved old bone at the time. The lads from the NZ Climate Science Coalition — yes, the same boys who tried to sue NIWA over the New Zealand temperature record and lost, and who then folded a trust to avoid paying court-ordered costs — have finally found a learned journal gullible enough to accept and publish their shonky reworking of NZ’s temperature record. Earlier this month Environmental Modelling and Assessment published A Reanalysis of Long-Term Surface Air Temperature Trends in New Zealand by CR de Freitas & MO Dedekind & BE Brill (DOI 10.1007/s10666-014-9429-z).

My attention was drawn to dFDB 2014 by an NZCSC press release, and yesterday Richard Treadgold, the man who kicked off the whole sad affair five years ago, posted a disingenuous and misleading article about the paper at his blog. As you might expect given the authors, the paper does not call for an upward revision in the amount of warming NZ has experienced over the last century. The abstract concludes with the following:

Current New Zealand century-long climatology based on 1981 methods produces a trend of 0.91 °C per century. Our analysis, which uses updated measurement techniques and corrects for shelter-contaminated data, produces a trend of 0.28 °C per century.

As you might also expect, given the authors and their respective track records, the paper is riddled with schoolboy howlers and outright misrepresentations. It would probably never have seen the light of day without the assistance of Chris “Pal Reviewde Freitas and his undoubted ability to steer tosh to publication.

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Salinger: New Zealand is drying out, and here’s why

In this guest post Jim Salinger (currently working in Italy, but soon to return to these shores), takes a look at the climate influences on last year’s severe New Zealand drought. It first appeared on The Conversation.

Over 2012 and 2013, parts of New Zealand experienced their worst drought in nearly 70 years. Drought is the costliest climate extreme in New Zealand; the 2012-2013 event depressed the country’s GDP by 0.7-0.9%. The drought of 1988-1989 affected 5,500 farms, pushing some farmers to the wall. But what does a climate-changed future hold?

Recent evidence confirms that New Zealand on the whole is getting dryer. And we’re beginning to understand why — increasing greenhouse and ozone-depleting gases are driving changes in the atmosphere, with impacts far beyond New Zealand.

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Record winter warmth in NZ: June 2014 breaks 140 year record

NZ7SSJune14

Hot off the press — or to be precise, Jim Salinger’s laptop: June 2014 was the warmest June in New Zealand since 1870, 2ºC above the 1971-2000 average, as measured by the long term “seven stations series” originally devised by Salinger and maintained by NIWA. On the larger 24 station series the month tied with 2003 at 2.1ºC above the 1971-2000 average. Many stations recorded warmest ever Junes, including Dunedin with 8.7ºC, +1.7°C above average, Invercargill with 7.8ºC (+2.2°C), Kaitaia (14.5, +1.7), Tauranga Aero (13.1, +2.4), Masterton Aero (9.8, +2.3), and Hokitika Aero (+10.4, +2.4). Jim points out that NZ warming is most clearly seen in the winter months (and expressed in the snow and ice record) but often escapes notice because a warm winter month is still “cool” compared with the seasons around it.

[Update 3/7: The Australian Bureau of Meteorology reports that the 12 months ending in June were the warmest July/June since records began (The Age. Jim Salinger tells me that in New Zealand July 13 to June 14 was the 3rd warmest in the long term record.]

In vino, climate veritas: Salinger on warming and the new world of wine

Wine grapes are a climatically sensitive crop grown across a fairly narrow geographic range. Growing season temperatures for high-quality wine production is generally limited to 13–21°C on the average. This currently encompasses the Old World appellation regions of France, Italy, Germany, Spain and the Balkans, and those developing New World regions in California, Chile, Argentina, southern Australia and New Zealand.

Speaking at the International Masters of Wine Symposium last month in Florence in Italy, professor Greg Jones, the wine climate specialist from the University of Southern Oregon, noted that the overall growing season temperature trend was upwards. This is for numerous wine regions across the globe from 1950–2000, by 1.3°C. Greater growing season heat accumulation with warmer and longer seasons has occurred. At the same time frost days (days below 0°C) have decreased from 40 to around 12 per year at Blenheim.

There has been a decline in the number of days of frost that is most significant in the dormant period and spring, earlier last spring frosts, later first frosts in autumn with longer frost-free periods. For example in Tuscany, the Chianti region of Italy, summer temperatures have increased by 2°C from 1955-2004. The warming is extending the world’s wine map into new areas such as British Columbia in Canada, Exmoor in England and into the southern Baltic.

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