A Deutsche Bank report debunking out-of date climate sceptics’ science will help to lock up the centre ground and disprove ill-informed rants like that by Michael O’Leary. “Red greens” linking climate change to left-wing politics should ally with center-ground thought like this until climate change is under control.

The Deutsche Bank Logo: A valuable sign to have next to a thorough rebuttal of weak and disproven arguments

Last Wednesday saw the publication of a Deutsche Bank report systematically taking apart the main out-of-date climate sceptic arguments that still seem to get repeated at every opportunity. This is an invaluable reference point, not because the arguments are new, but because it’s published with the logo of Deutsche Bank on it. No doubt there will be a backlash, other studies cited and counter narratives drawn up by journalists in the right-wing American press. Understandably so, given that the report explicitly aims to secure investment in climate change technologies and relies on Colombia University experts: they are wide open to accusations of bias that are fairly unarguable. This blog has always been keen to point out that not all sceptics are right-wing, oil-funded sultans of spin, but such right-wing attack dogs exist, and no doubt they will make themselves heard. Watch this space.

The other benefit of this report, is that it can’t be accused of shutting down debate. Well, I’m sure someone will find a way, but come on. This is not about science, it’s about PR: the arguments the report rebuts are out of date arguments that have been widely disproven by the scientific community but continue to be widely cited. A case in point is the recent interview with Michael O’Leary, CEO of Ryanair, which one commentator described as like “inviting the audience to play ‘climate sceptic bingo’, such is the density of clichés and canards contained within each of the sentences he utters”. Several the claims regurgitated by O’Leary’s are rebutted by this report. Quotes are mostly taken from the one page summary on their website for simplicity, but the report is exhaustively researched and referenced:

O'Leary: Not convinced by climate change

O’Leary: “It used to be [called] global warming, but now, when global temperatures haven’t risen in the past 12 years, they say ‘climate change’.”

Deutsche Bank: “In fact, the decade of 2000 to 2009 is the warmest since measurements have been made. Multiple factors affect global average temperatures, including the long-term warming trend from GHGs. This time-varying interaction of climate drivers can lead to periods of relatively stable temperatures interspersed with periods of warming. The anomalously high global average temperatures in 1998 associated with the El Niño have been followed by comparably high values that reflect a combination of long-term warming and shorter-term natural variability. Periods of relatively constant temperature are not evidence against global warming.”

O’Leary: “We’ve also had a couple of very hot spells during the Middle Ages, so nobody can deny [natural] climate change.”

Deutsche Bank: “Northern hemisphere temperatures in the Medieval Warming Period (MWP) may have been comparable to today, but the estimates have high uncertainty because there are so few records and spatial coverage is spotty. However, a MWP warmer than the last decade does not challenge the case for anthropogenic warming.”

O’Leary: “Scientists argue there is global warming because they wouldn’t get half of the funding they get now if it turns out to be completely bogus”

Deutsche Bank: Page 14 of the report points out that climate change accounts for a relatively small amount of government budgets and barely filters through to individual researchers.

O’Leary: “it is absolutely bizarre that the people who can’t tell us what the fucking weather is next Tuesday can predict with absolute precision what the fucking global temperatures will be in 100 years’ time.”

Deutsche Bank: “We do not rely only on models for our understanding of the effect of greenhouse gases on climate. Theory (i.e. the physics and chemistry of the planet’s atmosphere and ocean) and observations are the foundation of our ability to understand climate and to assess and quantify forcing and impacts. Models represent the most formal way in which to project and quantify future conditions. Despite well known limitations to climate models such as the uncertainties of clouds, aerosols, and spatial resolution, climate models are increasingly able to reproduce a range of physical processes and feedbacks. They unanimously predict warming with increasing greenhouse gases of a magnitude consistent with estimates independently derived from observed climate changes and past climate reconstructions.” (Incidentally, no-one would argue that climate models show “absolute precision”, but they are considered at their most accurate between 40 and 60 years into the future. In the short term natural variability can mean temperatures don’t fit the models, but these tend to average out over time. In the longer term there are more and more incompletely understood factors playing a role).

Deutsche Bank: Not an obvious ally to left-wing agendas like climate camp (picture bottom right)

What’s important with these kinds of scientific arguments is not that they shut down debate, which they don’t, but that they contain it. One only has to look on the blogosphere, on news websites or on Amazon.com to see that there is not a lack of climate change debate, and the idea sometimes put about that the liberal intelligencia is trying to shut it down is self-evident nonsense. Scientific debates and discussions are important, but they tend to dominate discussion, including in the media. When climategate, “glaciergate” and various other more minor “gates” drag discussion back to scientific bickering over temperature records, we lose sight of managing mitigation and adaptation. If this report is widely distributed, the summary of the arguments will prove invaluable in debunking sceptic myths.

The hockey stick controversy gets significant attention in the report (indicative of its continued high profile) and recognises the role of legitimate criticism by McIntyre and McKitrick while still puncturing the over-hyped “breaking of the hockey stick”. This distinguishes effectively between real criticism and types of “attacks on science” spelled out in the introduction. The report is careful to cast its net wide, dealing with both the scientific disputes and other claims, like the argument that climate scientists spin results to secure funds.

Climate Camp: Capitalism needs to be rethought alongside climate change

This presents a problem for the “red greens” campaigning on climate change, who are probably unwilling to jump into bed with the likes of Deutsche Bank. Less than a month ago protesters at “climate camp” in Edinburgh were arguing that one can’t engage with climate change without rethinking the capitalist system . In all honesty I’m not unsympathetic – is there a link between the western world’s addiction to economic growth and various environmental problems, including declining finite resources (oil, precious metals), deforestation and climate change? No question. Unfortunately it is widely thought that the point at which catastrophic climate change becomes inevitable is about…now. Rethinking the world’s relationship with what goes into its economy (natural resources) and what comes out (pollution) is an important project, but one on a much longer timescale. It’s not going to happen overnight, while effective climate change mitigation and adaptation must. To put it another way: guys, Deutsche Bank is now your friend. Deal with.