RealClimate logo

Technical Note: Sorry for the recent unanticipated down-time, we had to perform some necessary updates. Please let us know if you have any problems.

Consensus as the New Heresy

Filed under: — group @ 3 January 2007

Gavin Schmidt, Michael Mann, David Archer, Stefan Rahmstorf, William Connolley, and Raymond Bradley

Andy Revkin, who’s one of the best journalists on the climate beat, wrote a curious piece in the NY Times discussing the ‘middle stance’ of the climate debate. It’s nice to see news pieces on climate that aren’t breathless accounts of a new breakthough and that take the time to point out that the vast majority of relevant scientists take climate change extremely seriously. To that extent, the message of this piece was a welcome one. The curious part, however, was the thread running through the piece that this middle ground is only now emerging, and even curiouser, that this middle ground can be characterized as representing some sort of ‘heresy’.

Heresy, is commonly defined as ‘an opinion or doctrine at variance with the official or orthodox position’. So where does this idea come from, and why is it now ‘emerging’?

It has often been remarked upon that scientists and academics make their reputations by breaking down orthodoxies and by challenging previously widespread assumptions (but it will only work out well if they’re right of course!). Nobody makes much of a name for themselves by agreeing with all previous thinking. Indeed, to be thought of as a radical new thinker, one must assume the role of the heretic, challenging the stale orthodoxies of the past. And given some of the scientific iconoclasts in our pantheon (Galileo, Einstein, Wegner etc.), we see this as a completely natural state of affairs.

However, there is a big difference between really challenging the majority opinion and simply stating that you are. We are all often ‘contrary’, but here at RC we also generally find ourselves firmly in the mainstream on many of the central scientific points: e.g., our views on the most probable value of the climate sensitivity (around 3C), the likelihood of the imminent Gulf Stream reversal (zero), or the possibility of Venusian-style runaway greenhouse effect happening this side of a billion years (extremely small). That these positions are in line with conclusions drawn by IPCC is no surprise, because those reports result from intense discussion and peer-review involving a large fraction of the community, thus they reflect the views of the climate science community very well. Most scientists present these widely shared conclusions when speaking to the public, and where their own views diverge from it, they make it clear that these are their own conclusions rather than a generally accepted view.

In reading about the new ‘heretics’ then, one might have expected that associated with them would be statements that would contradict IPCC or that we (as mainstream scientists who do not claim to be heretics) would otherwise find objectionable. So let’s consider the specific tenets of the ‘new heresy’ mentioned in the article:

  • From Carl Wunsch: ‘It seems worth a very large premium to insure ourselves against the most catastrophic scenarios. Denying the risk seems utterly stupid. Claiming we can calculate the probabilities with any degree of skill seems equally stupid’. Agreed.
  • “Many in this camp seek a policy of reducing vulnerability to all climate extremes while building public support for a sustained shift to nonpolluting energy sources”. Sensible.
  • There is “no firm evidence of a heat-triggered strengthening in storms in recent years” (our emphasis). Well, what the WMO statement to which this assertion is attributed actually said was (first bullet point): “Though there is evidence both for and against the existence of a detectable anthropogenic signal in the tropical cyclone climate record to date, no firm conclusion can be made on this point.” We agree with that statement – this particular subject is definitely in a state of flux.
  • “Recent increase[s] in the impact of storms was because of more people getting in harm’s way, not stronger storms”. Again, the WMO report did not state this. What it stated was (third bullet point of statement; emphasis added): “The recent increase in societal impact from tropical cyclones has largely been caused by rising concentrations of population and infrastructure in coastal regions”. These are not quite the same. Once again, we agree with what the WMO actually said. Interestingly, the second bullet point of the WMO statement, not mentioned in the article, “No individual tropical cyclone can be directly attributed to climate change” was voiced by us more than a year ago.
  • “Global warming is real, it’s serious, but it’s just one of many global challenges that we’re facing,”. Of course.
  • From Mike Hulme: “I have found myself increasingly chastised by climate change campaigners when my public statements and lectures on climate change have not satisfied their thirst for environmental drama,” he wrote. “I believe climate change is real, must be faced and action taken. But the discourse of catastrophe is in danger of tipping society onto a negative, depressive and reactionary trajectory.” Agreed. And we said much the same thing when commenting on the ‘Climate Porn’ report.
  • “It is best not to gloss over uncertainties”. Duh!
  • “efforts to attribute recent weather extremes to the climate trend, though they may generate headlines in the short run, distract from the real reasons to act”. We couldn’t agree more, and have stated as much before.
  • “‘An Inconvenient Truth’ may push too hard”. Perhaps at last, there is a (moderate) difference of opinion. We agree with Eric’s review of the movie earlier this year, i.e. while there were a few things to quibble with, Gore got the science basically right.

The only substantial disagreement, then, is over a movie review. On all other points of substance the ‘heresy’ and the old orthodoxy are the same.

We’ve emphasised over and over that the science that should inform policy should come from thorough assessment processes like the IPCC and the National Academies. The views of individual scientists (including us) should carry less weight – partly because of our specific biases (due to the field we work in or our personalities), and partly because a thorough discussion and peer review process (like that leading to IPCC reports) will lead to more considered, informed and balanced statements than any individual could muster. Media representations of what individual scientists supposedly said should not be used for policy at all!

Much of the sensationalist talk in the public discourse (and to which the scientists in the piece, and we, rightly take exception) are not the pronoucements of serious scientists in the field, but distorted and often out-of-context quotes that can be further mangled upon frequent repetition. We have often criticised such pieces (here, or here for instance) and it is important to note that the ‘shrill voices of doom’ referred to by Mike Hulme were not scientists, but campaigners.

John Fleck suggests that Revkin’s point was that the middle stance is only now being reflected in the media coverage, which for the highly polarised US discussion could be a valid point – although Revkin’s own work in the New York Times argues against it. So does the fact that all of the scientists discussed in this piece are veterans in media coverage of the issue; their view of things can hardly be called “just emerging”.

Perhaps the real background to Revkin’s piece simply is that some like to use the age-old debating tactic of labelling other views as “extreme” in order to position themselves in the “middle”. If you divide the world into ‘alarmists’ and ‘deniers’, you can then nicely present yourself as the ‘heretic’ who wants to break the mold. But this is a false distinction.

The plain fact is that the vast majority of scientific judgement on this issue – as outlined in the IPCC documents including the AR4 coming up in February- does indeed cover the ‘middle stance’, which we would state as being in agreement with the statement of the National Academies of the G8 last year that ‘the scientific understanding of climate change is now sufficiently clear to justify nations taking prompt action’. As Jim Hansen states in his quote – it’s still surprising that there are some people who don’t know this yet.

Further discussion on this piece is available: Matthew Nesbit, John Fleck, Roger Pielke Jr, David Roberts and Andrew Dessler. Also Joseph Romm.

259 Responses to “Consensus as the New Heresy”

  1. 251
    Jim says:

    Re 249.

    “people own waterfront property”

    Yes they do and they loose it all of the time due to erosion or to lakes drying up due to a sinkhole. Things happen all of the time and they are not due to global warming. What happen’s if a quake levels LA tomorrow. Was that becuase global warming as well?

    Change is inevitable and the earth has shown great range of change without our influence. I agree with Kevin, again we think we are th center of the solar system. (Where is our modern Copernicus?)

    Face the facts warming or cooling will happen. Change happens. The earth is a dynamic system. (If it wasn’t we would not be alive.)

    BTW the artic is shrinking that is true, but the antartic ice sheet is still growing and that is where most of the earth’s ice is.

  2. 252

    [[I do not understand why some people always say that temperature will always be bad. For some folks change is always terrible and humans and the planet are done for etc.etc. Whether or not I believe warming is happening. (Yes it is getting warmer.) I do not know the affects of warming but I know this, we as a species and the species diversity will not be doomed. We have survived changes such as this before (last glacial maximum was around 18,000 years ago and humans were here then else we would not be here today.) and to say that we can no longer do so is pure stupdity. ]]

    Of course we can survive it. But it would still be nice to avoid trillions of dollars worth of economic damage and millions of deaths.

    [[One other little thing, hydro is not green power so don't count it.]]

    It doesn’t pollute the air, unless you count the CO2 from the cement drying.

    [[ Nobody know how good wind is either. Just becuase something doesn't emit GHG doesnt mean it does not do harm. That there are no known observable affects today for wind does not mean that it is a good thing. Remeber we did not think oil was bad at first either and now look where we are! Think of this small amounts of C02 are supposed to make major changes to the earth right. Now start extracting that much energy that we used to get from oil from wind. Would that not have an affect? What happens when energy needs double, triple. You gonna put up a windmill every 5 feet? We have to find something more, something viable to replace oil. Wind is nothing more than a bandaid on a sawed off leg. ]]

    The potential for wind energy is so vast that A) it can be a major source of energy, and B) we are unlikely to extract enough to make a noticeable difference.

  3. 253

    [[i am not saying DO NOTHING. i am saying IT IS TOO LATE. and i am saying start THINKING ABOUT 1000 years from now, when this life experiement of humankind will end. that;s all i am saying. start planning for how Generation 3000 will die......]]

    There’s no particular reason to think you’re right about this.

  4. 254
    John L. McCormick says:

    RE # 253

    danny bee, I am asking you to change your message or stop repeating this one.

    There are, I hope, many young persons and likely many students regularly visiting RC. Your message is most inappropriate and even self-defeating for that audience.

    Yes, one can not argue that we (the gownups) screwed up. But, it is not for we- the grownups- to tell the youth that the game is up. All is lost. Go home. Be happy.

    Come on, dude. In my darkest moment, I will never say those things to my son and daughter.

    Read this as a protest against your message.

  5. 255
    Jim says:

    Re. 254

    C02 is not the only GHG. Hyrdro releses alot of methane due to the endless rotting of plants on the resevoir shore. (Damn resevoirs never have much of a stable shore, flood more than normal and dry up more than normal) Just becuase something isn’t burning doesn’t mean there is no affect.

    Also prove that wind power has no affect on the atmosphere. You can’t because no one knows.

  6. 256

    Re “Also prove that wind power has no affect on the atmosphere. You can’t because no one knows.”

    You mean YOU don’t know. The amount of energy tied up in the Earth’s atmospheric motion has been calculated several times, I believe, and regional studies have been done as well. The power involved is going to be a certain fraction of the Solar power the planet absorbs, and an atmospheric energy balance could be a good place to start if you want to explore this further. Kiehl and Trenberth (1997) have a nice one, and I believe it’s available on the web.

  7. 257
    Hank Roberts says:

    … Existentialist declare
    that they are in complete despair
    yet go on writing.

  8. 258
    danny bee says:

    but hank, i am not in complete despair, there is still hope for polar cities in the future. but we must start thinking of building them now.

  9. 259
    David Price says:

    comment no.243
    I don’t think buying in to Lovelock is very sensable. At worst the planet will be like the Cretacous period. When the dinosaurs ruled the earth the planet was much hotter, but supported an abudance of life. If humans had been around then they may have survived, the climate if not the dinosaurs.
    Remember fossil fuels are starting to run out, so doublings or treblings of atmospheric Co2 concentrations are fantasy anyway. Regard Lovelock as bad science fiction.

Switch to our mobile site