Sunday, November 21, 2010

Disturbing climate change headlines

Yesterday Tom Yulsman at CEJournal came across a story in Fog City Journal that led to a brief post, on which I commented there.

The topic is the fraught question of what's the best way for scientists to respond to global warming Know-Nothingism. My first comment was followed by a response from Tom, and I've responded with a longer note that seems worth sharing here. It turns out that there is a great deal that needs to be said.

What follows is my second response, more or less verbatim.

Tom, I've read the Revkin article and the Feinberg/Willer paper. [See the press release for quick summary.] Thanks for the references. However, I don't find them very persuasive. Apologies in advance for the length of this note.

The Feinberg/Willer paper is based on the social psychology circle of ideas known as "Just World Theory" (JWT). Curiously, the book of the "founder" of JWT, Melvin Lerner, is entitled The Belief in a Just World: A Fundamental Delusion. Unfortunately, I don't have ready access to that volume, but I note that there is no question mark in the title, so I don't know whether Lerner himself actually regarded the underlying "just world" belief as a delusion.

Although the underlying belief that JWT deals with seems philosophically controversial (at best), JWT itself simply asserts that "many people" have this belief, and that certain consequences follow. One thing that concerns me is whether substantial evidence has been developed that quantifies how many people hold the underlying belief in the world's justness. At most it seems like just one dimension in a multidimensional space of belief systems.

It's clear enough that many people have religious beliefs that are incompatible with the idea that a "just" deity would allow the kind of climate developments that science predicts, and so such people deny the science. But that's a pretty broad feature of religion in general – it denies many kinds of science that clash with religion. So what's science supposed to do – give up and say, "Oops. we aren't really predicting what the evidence strongly indicates"?

The Feinberg/Willer paper argues that certain sorts of positive messages increase subjects' acceptance of the ideas (1) that the scientific evidence for global warming is good and (2) that science can find solutions to the problem. In other words, these messages are pro-science in a feel-good, non-threatening way. So of course it's not too surprising that the subjects who heard these messages exhibited greater acceptance of scientific conclusions. This is basic marketing theory.

One problem is that the part of the message that says science can find a "solution" to the problem is likely to be false. It's probable that there is no largely scientific solution. Mitigation of climate change is probably much more of an economic and political issue, because significant behavioral change and economic adjustment are likely to be necessary. Of course, this assertion is also open to debate.

I think that the best science has actually discovered a lot that suggests the threat of climate change is even more dire than some cautious observers assume. There is, for example, this: summary of ten rather disturbing types of climate threat reported in the past year.

You [Tom] wrote, "30 years of unrelenting fear appeals on climate change have gotten us, well, where? I would argue pretty much nowhere. If ever there was a prima facie case that fear appeals on climate change don’t work, this is it."

I'm afraid that by the very same sort of argument, 30 years of attempts to patiently and rationally educate the public on the science of climate change have also failed.

The real problem is that what's actually true is that different approaches work best with different types of people, depending on their undelying personality types and value systems. For example see Skeptics discount science by casting doubts on scientist expertise or the paper it discusses – Cultural cognition of scientific consensus.

One of the individuals that Revkin quotes in his article, Dan Kahan at Yale [and a founder of the Yale Cultural Cognition Project], states the problem quite well:
I think it [Feinberg/Willer] is good research, and maybe captures something that is going on in the real world debate. But it doesn’t capture what’s most important: the source of individual differences. People disagree about climate change; it is one of a cluster of science & policy issues that polarize citizens along cultural/political lines. "Just world" theory posits a general psychological mechanism that affects everyone. Necessarily, then, it can’t explain why one and the same set of informational influences (e.g., stories reporting "scientific consensus" on climate change) provoke different reactions in identifiable subcommunities. The theory that we need is one that identifies what the identifying characteristics of these communities are and how they are implicated in cognition of risk. No theory that focuses of [sic] generic or population-wide aspects of the psychology of risk perception (so-called "main effects") can do that.

In other words, a lot more needs to be done to steer public attitudes in the right direction. It is not a matter of simply finding the most comforting feel-good way to "frame" the issue, if that just entails obscuring the hard scientific facts. That is a vain hope.

I don't have a solution of the problem, but I think a solution should include a careful evidence-based appraisal of the kinds of messages that work best with different groups, combined with a plan for how to deliver the messages through different channels appropriate for different groups.

It's a lot like any other tough political campaign. Sometimes "negative" campaigning works very well, sometimes it doesn't.

I can see what's going on here. There are obviously efforts being made by a broad range of social scientists, communication experts, and journalists to shape an effective messaging strategy. For example: ClimateEngage.org. This is probably good. What is not clear is whether the people most involved will be able to identify a near-optimal strategy.

Just to name names, Matthew Nisbet [also here, here] (whom Revkin also quotes) is one with whom I find a lot to disagree – such as the whole "post-partisan" shtick. The elephant in the room is that most opponents of the necessity of acting on climate change – to say nothing of those who deny it even exists and/or is anthropogenic – have no intentions of operating in a reasonable and responsible "post-partisan" fashion.

There really is a war going on here. Climate scientists who don't face up to this reality are going to get the crap beat out of them. Just ask Phil Jones or Michael Mann [more here], for example. Much like Lt. Colonel George Custer at the Little Big Horn.

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Monday, August 27, 2007

Readings, 27 August 2007



The text following each item is quoted material, except for editorial comments, which are in color.

Climate change and global warming

Last time around was all about physics and astronomy. This time it's about climate change and global warming, with special emphasis on climate modeling and the politics surrounding these things.


Catching Up With Climate
From the evidence of tree rings, the last 50 years were the warmest half-century in 1,300 years. Eleven of the past 12 years are the hottest on record since reliable record-keeping began in 1850; since 1870, sea level has risen some eight inches worldwide, and the rate is accelerating; since 1900, glaciers have shrunk 80 percent, and polar ice is melting fast; concentrations of carbon dioxide are 35 percent higher than preindustrial levels.

To lead off, we have an article on climate models, some of the people who contribute to them, and the diverse factors that enter into them.

A new dawn for climate prediction
Scientists must develop new, more adaptive approaches to predicting and monitoring climate, say climate modellers from the University of Exeter. In a 'perspectives' article published in leading journal Science, Professor Peter Cox and Professor David Stephenson argue that new prediction tools are required to help us to limit and adapt to climate change.

Here we have a brief overview of a Perspectives article, recently published in Science, about some shortcomings of current climate models with respect to usefulness in making policy decisions. This is the full article, but a subscription is required to read it all.

Cloudy Crystal Balls
Climate models may never produce predictions that agree with one another, even with dramatic improvements in their ability to imitate the physics and chemistry of the atmosphere and oceans. That's the conclusion of a report by James McWilliams, an applied mathematician and earth scientist at the University of California, Los Angeles. The mathematics of complex models guarantees that they will differ from one another, he argues. Therefore, says McWilliams, climate modelers need to change their approach to making predictions.

Julie Rehmeyer weighs in with an excellent summary of McWilliams' report. Although there are well-known shortcomings in current climate models, a key observation is this:

McWilliams says that discrepancies among models do not undermine the most crucial conclusion of climate modeling—the notion that increased levels of greenhouse gases emitted by people are causing the Earth to warm and will continue to do so. He notes that every credible climate model ever made has pointed to that same conclusion. "All sorts of smart climate scientists have tried to produce a model that doesn't show future warming," he says, "and no one has been able to in a credible way."

Happily, McWilliams' report is open access, and can be found here.

The Truth About Denial
If you think those who have long challenged the mainstream scientific findings about global warming recognize that the game is over, think again. Yes, 19 million people watched the "Live Earth" concerts last month, titans of corporate America are calling for laws mandating greenhouse cuts, "green" magazines fill newsstands, and the film based on Al Gore's best-selling book, "An Inconvenient Truth," won an Oscar. But outside Hollywood, Manhattan and other habitats of the chattering classes, the denial machine is running at full throttle—and continuing to shape both government policy and public opinion.

Sharon Begley at Newsweek gives us a detailed and hard-hitting account of the political tactics and strategies that global warming deniers have used over the years in attempting to discredit climate change science and prevent any effective government response. Mentioned in passsing is a review by Congressman Rush Holt (D-NJ), a PhD physicist, of Al Gore's book and movie, An Inconvenient Truth. It appeared in Science last month, and can be found here (subscription rqd).

Heretical Thoughts about Science and Society
My first heresy says that all the fuss about global warming is grossly exaggerated. Here I am opposing the holy brotherhood of climate model experts and the crowd of deluded citizens who believe the numbers predicted by the computer models. Of course, they say, I have no degree in meteorology and I am therefore not qualified to speak. But I have studied the climate models and I know what they can do.

The author of this piece, Freeman Dyson, is (of course) a highly-respected mathematician and theoretical physicist who has frequently in his long career written very intelligently about scientific and cultural subjects far outside his nominal sphere of expertise. Here he expresses skepticism about computer climate models and their general proclivity to support the idea of anthropogenic global warming.

However, his distinguished status does not mean he is correct on this particular issue, any more than, say, Linus Pauling was correct in his championship of the the health benefits of megadoses of vitamin C. As Pauling himself has been quoted as advising "When an old and distinguished person speaks to you, listen to him carefully and with respect – but do not believe him. Never put your trust in anything but your own intellect. Your elder no matter whether he has gray hair or lost his hair, no matter whether he is a Nobel Laureate, may be wrong."


The Changing Arctic: A Response to Dyson's "Heretical Thoughts"
Knowing that Arctic climate models are imperfect, it would be reassuring for me, if not for the scientists, to be able to write that scientists keep making grim predictions that just that don't come true. If that were so, we could follow Dyson's line that the models aren't so good and "the fuss is exaggerated". Scarily, the truth is the other way around. The ice is melting faster than the grimmest of the scientist's predictions, and the predictions keep getting grimmer. Now we are talking about an Arctic free of ice in summer by 2040.

Author Alun Anderson, who has had top-level positions with Nature, Science, and New Scientist, gives a sensible rebuttal to Dyson's essay.

Science vs. politics gets down and dirty
Malicious, vindictive and mean-spirited. These are words that might surface in divorce court.

But they have been lobbed in the course of a different estrangement: the standoff between the Bush administration and the nation's scientific community.

The relationship, which has been troubled since the dawn of the Bush presidency, hit a new low last month when Richard Carmona, surgeon general from 2002 to 2006, lashed out at his former colleagues in testimony before a House committee.

This one isn't, strictly speaking, about climate change. It's more like the political science of contemporary science policy in the U. S. – but climate change is one of two or three leading scientific issues currently under contention. What this is really about is all-out propaganda warfare being waged by a highly ideological administration on behalf of its supporters (mainly in big business and organized religion) against parts of reality-based science that threaten the economic or ideological interests of those supporters. Political scientists will be studying this conflict for years to come, even if it does not further escalate.


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Wednesday, September 27, 2006

Shhhh! Maybe if we don't talk about it, it will go away

Journal: Agency Blocked Hurricane Report
A government agency blocked release of a report that suggests global warming is contributing to the frequency and strength of hurricanes, the journal Nature reported Tuesday.

The National Oceanic and Atmospheric Administration disputed the Nature article, saying there was not a report but a two-page fact sheet about the topic. The information was to be included in a press kit to be distributed in May as the annual hurricane season approached but wasn't ready.

May? As in eight months from now? But is anyone really surprised?
"The document wasn't done in time for the rollout," NOAA spokesman Jordan St. John said in responding to the Nature article. "The White House never saw it, so they didn't block it."

Anyone think it wouldn't have been blocked if it got as far as the White House? In any case, it got blocked at a lower level. Since when is it necessary to get W. H. approval for scientific findings? Oh, wait. Never mind. If that's not a law already, the W. H. will be sending legislation to Congress real soon.
NOAA Administrator Conrad Lautenbacher is currently out of the country, but Nature quoted him as saying the report was merely an internal document and could not be released because the agency could not take an official position on the issue.

However, the journal said in its online report that the study was merely a discussion of the current state of hurricane science and did not contain any policy or position statements.

In fact, there's been a lot of news about global warming and hurricanes just this month. Here are various news reports from about two weeks ago:

  1. September 11, 2006 - Humans 'causing stronger storms'
  2. September 11, 2006 - Humans affect sea warming in hurricane zones
  3. September 11, 2006 - A Human Spin on Hurricanes
  4. September 12, 2006 - Human Activities Found To Affect Ocean Temperatures In Hurricane Formation Regions
  5. September 12, 2006 - Human activities are boosting ocean temperatures in areas where hurricanes form
  6. September 12, 2006 - Report links global warming, storms

Memo to W. H.: The cat's already out of the bag.

And actually, it's been a rather busy month in terms of news about global warming. For instance, here are some articles on the melting of arctic sea ice, and its effect on polar bears (among other things):

  1. September 13, 2006 - Arctic sea ice shrinks, a sign of greenhouse effect
  2. September 14, 2006 - Winter Arctic sea ice in drastic decline
  3. September 14, 2006 - Arctic sea ice diminished rapidly in 2004 and 2005
  4. September 14, 2006 - Warming Climate May Put Chill On Arctic Polar Bear Population
  5. September 14, 2006 - 'Drastic' shrinkage in Arctic ice
  6. September 14, 2006 - Arctic ice: it's melting - Scientists say wintertime loss of polar ice is growing along with a continuing summertime pattern and is strong evidence of global warming
  7. September 15, 2006 - Polar bears drown, islands appear in Arctic thaw
  8. September 15, 2006 - Arctic Ice Meltdown Continues With Significantly Reduced Winter Ice Cover

Yeah, OK, so it's getting hotter. But that doesn't mean it's caused by humans. Maybe the Sun is just putting out more heat? Nope:

  1. September 13, 2006 - No Sunshine for Global Warming Skeptics
  2. September 13, 2006 - Don't Blame the Sun
  3. September 14, 2006 - Changes In Solar Brightness Too Weak To Explain Global Warming
  4. September 14, 2006 - Study clears Sun of climate change


And what about all the methane -- an even more potent greenhouse gas than CO2 -- that's being released from thawing permafrost in Siberia:

  1. September 6, 2006 - Siberia's pools burp out nasty surprise
  2. September 6, 2006 - Melting lakes in Siberia emit greenhouse gas
  3. September 6, 2006 - Study Says Methane a New Climate Threat
  4. September 7, 2006 - Greenhouse Gas Bubbling From Melting Permafrost Feeds Climate Warming
  5. September 7, 2006 - Methane bubbles climate trouble
  6. September 7, 2006 - Melting permafrost spews out more methane
  7. September 8, 2006 - Siberian lakes burp "time-bomb" greenhouse gas
  8. September 13, 2006 - Greenhouse gas bubbling from Siberian permafrost

Should we be worried about this even if the W. H. isn't?

World has 10-year window to act on climate: expert
A leading U.S. climate researcher said on Wednesday the world has a 10-year window of opportunity to take decisive action on global warming and avert a weather catastrophe.

NASA scientist James Hansen, widely considered the doyen of American climate researchers, said governments must adopt an alternative scenario to keep carbon dioxide emission growth in check and limit the increase in global temperatures to 1 degree Celsius (1.8 degrees Fahrenheit).

"I think we have a very brief window of opportunity to deal with climate change ... no longer than a decade, at the most," Hansen said at the Climate Change Research Conference in California's state capital.

If the world continues with a "business as usual" scenario, Hansen said temperatures will rise by 2 to 3 degrees Celsius (3.6 to 7.2 degrees F) and "we will be producing a different planet."

Does the name "James Hansen" ring any bells? It should:
Hansen, who heads NASA's Goddard Institute for Space Studies, has made waves before by saying that President George W. Bush's administration tried to silence him and heavily edited his and other scientists' findings on a warmer world.

Yep. Same old same old. W. H. trying to shut up the scientists. We wrote about it back in February (about 2/3 down the page).

Perhaps the W. H. knows something we don't. Like, maybe, a little bit of global warming is no big deal, compared to the nuclear war they're planning to start with Iran -- real soon now.

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Monday, December 26, 2005

Global warming could halt ocean circulation

It's looking more and more as though one of the more unwelcome consequences of global warming may come to pass by 2100 -- the paradoxical possibility of much colder termperatures in Europe and the northeastern U. S.

Weakening of ocean's circulation could actually cool things down

Things get worse if the north Atlantic water is swamped by fresh water from rain, continental rivers or melting glaciers, especially from the Greenland ice cap. Fresh water dilutes the salty ocean, making it less dense and even more buoyant. In a worst-case scenario, the north Atlantic water is so warm and buoyant that it can't sink at all, as if it were an inflated balloon floating atop a swimming pool.

When that happens, the oceanic heat-transport system stalls or totally breaks down. Like a blood clot in a vein, the buoyant water blocks the oceanic circulation, preventing new warm tropical water from flowing north, and Europe's average temperature drops by several degrees.


How likely is this to happen? Some researchers think it's a lot more probable than recently believed:

Global warming could halt ocean circulation, with harmful results

Absent any climate policy, scientists have found a 70 percent chance of shutting down the thermohaline circulation in the North Atlantic Ocean over the next 200 years, with a 45 percent probability of this occurring in this century. The likelihood decreases with mitigation, but even the most rigorous immediate climate policy would still leave a 25 percent chance of a thermohaline collapse.

“This is a dangerous, human-induced climate change,” said Michael Schlesinger, a professor of atmospheric sciences at the University of Illinois at Urbana-Champaign. “The shutdown of the thermohaline circulation has been characterized as a high-consequence, low-probability event. Our analysis, including the uncertainties in the problem, indicates it is a high-consequence, high-probability event.”


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Saturday, October 15, 2005

Be Afraid, Be Very Afraid

In a post ominously entitled Be Afraid, Be Very Afraid Clifford Johnson at Cosmic Variance talks about a campus colloquium he organized, featuring Professor Nathan Lewis.

The topic was Scientific Challenges in Sustainable Energy Technology. The reason for the bleak, sepulchral title of the post may be inferred from this paraphrase of a key point of Lewis' talk:
no matter how conservative you are about the effects this [carbon dioxide dumping] will have, and no matter how optimistic you are about the difference we will make by trying to clean up our act using emissions reductions, we are extremely late in getting around to considering greenhouse-gas-emission-free primary sources of energy. How late? Well, using generous estimates of how the trends will continue if we use the policy of “business as usual” currently advocated by our policy makers, by about 2050, we will begin to pass the point where it will take of the order of 1000 years to restore the levels of greenhouse gas to anything like we were used to. [emphasis in original]

The talk as a whole was generally about sustainable energy technology, and the bottom line is that no matter how much effort we put into development of that technology, it can't come soon enough to reduce greenhouse gas emissions sufficiently to avoid significant global warning.

In other words, under any foreseeable scenario, we're probably going to have to cope with the effects of global warming within a few decades. Although I'm not even close to being an expert on this, I've already come to that conclusion.

Anyhow, this is a very worthwhile post to ponder, and you can learn more from other material associated with the presentation.

At the end of the post there's also a plug for another favorite theme: The quest for better science education

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Sunday, September 18, 2005

Global warming and hurricanes

In light of what I said yesterday, "our preparation should certainly be a large investment in science and technology for coping with the possible effects we can foresee," the following may be of interest.

First, new research shows that there is a relationship between warming and the proportion of strong hurricanes: Warming world blamed for more strong hurricanes.
The study finds there has been no general increase in the total number of hurricanes, which are called cyclones when they appear outside the Atlantic. Nor is there any evidence of the formation of the oft-predicted “super-hurricanes”. The worst hurricane in any year is usually no stronger than in previous years during the study period.

But the proportion of hurricanes reaching categories 4 or 5 – with wind speeds above 56 metres per second – has risen from 20% in the 1970s to 35% in the past decade.
Second, there has been research into possible ways to disrupt or deflect hurricanes: Could humans tackle hurricanes? But merely deflecting hurricanes isn't without problems:
[H]urricane steering creates hard choices. “Choosing between a Category 3 hitting Pensacola and a Category 5 hitting New Orleans is easy. But the people of Pensacola may have something to say about it.”
Here's a full article on controlling hurricanes at Scientific American.

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Saturday, September 17, 2005

Global warming: point of no return?

The bottom line: we're screwed.

Global warming 'past the point of no return'
A record loss of sea ice in the Arctic this summer has convinced scientists that the northern hemisphere may have crossed a critical threshold beyond which the climate may never recover. Scientists fear that the Arctic has now entered an irreversible phase of warming which will accelerate the loss of the polar sea ice that has helped to keep the climate stable for thousands of years.

They believe global warming is melting Arctic ice so rapidly that the region is beginning to absorb more heat from the sun, causing the ice to melt still further and so reinforcing a vicious cycle of melting and heating.

The greatest fear is that the Arctic has reached a "tipping point" beyond which nothing can reverse the continual loss of sea ice and with it the massive land glaciers of Greenland, which will raise sea levels dramatically.
Some people still think this is alarmist nonsense. However, the scientific consensus continues to grow more one-sided: global warming is real. And the evidence is coming from many directions. For instance, this:

Vegetation Growth May Quickly Raise Arctic Temperatures
Warming in the Arctic is stimulating the growth of vegetation and could affect the delicate energy balance there, causing an additional climate warming of several degrees over the next few decades. A new study indicates that as the number of dark-colored shrubs in the otherwise stark Arctic tundra rises, the amount of solar energy absorbed could increase winter heating by up to 70 percent.

Yet some people still think that the warming probably isn't even real, and many more think the effects won't be as serious as projected even if warming is real. The latter sort of remind us of the people in New Orleans who decided not to evacuate before the hurricane (either because they had no easy means to, or they simply thought they could "ride it out"). Well guess what. In that case, the effects were much worse than most feared.

And there are reports that political leaders who have previously supported efforts to reduce greenhouse gas emissions, like the UK's Tony Blair, may be changing their minds. Considering the source, don't take that as a sure thing. But it is possible that the problem is now recognized as so serious that reducing emissions, even more drastically than foreseen by the Kyoto treaty, won't avert something really bad. What's the alternative? This last reference suggests:
So what will happen instead? Blair answered: "What countries will do is work together to develop the science and technology….There is no way that we are going to tackle this problem unless we develop the science and technology to do it."
However, if warming is real, unavoidable, and likely to have more serious effects -- and possibley sooner -- than generally supposed, then perhaps science and technology won't be able to let us avoid a really bad outcome. Maybe the best we can hope for is making it a little less bad.

Pursuing the Katrina analogy, it may be it's much too late to flee the hurricane bearing down on us or to prevent the breaching of the levees. At best we can employ science and technology in a crash program to build better pumps to clean up a little bit faster after the diaster that "no one could have foreseen" actually occurs. It may or may not be possible to significantly mitigate global warming over the next century. But part of our preparation should certainly be a large investment in science and technology for coping with the possible effects we can foresee.

Maybe that's a pessimistic scenario. But isn't disaster planning largely about planning how to handle the "worst" case?

People will be tempted to think that with just a little preparation we can "ride out" the coming global warming storm without much inconvenience. But if New Orleans is any indication, that might not be such a good idea.

And what about New Orleans itself? Rebuilding it might be the "right" thing to do. But we darn well better plan for higher sea levels and more frequent and powerful hurricanes.

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