Ron Bailey's Got Live If You Want It!
Nick Gillespie | August 4, 2006, 5:25pm
Reason Science Correspondent Ronald Bailey will be on PBS' Newshour tonight, discussing global warming. For local station info, go here. For Ron's column on Al Gore's "An Inconvenient Truth," go here. And for his column on why "we're all global warmers now," go here.
Buy Ron's great book, Liberation Biology, here.
And while you're at it, why don't you just subscribe to Reason already?
Update: Transcript and audio online here.
thoreau | August 5, 2006, 9:49am | #
Stuart, there's a difference between curiosity and enthusiasm.
As a practicing scientist, I tend to be very skeptical even of the things that I'm working on: I'm fascinated by them, I think there's a lot of potential there, but I'm also keenly aware of the obstacles. I temper my enthusiasm with informed skepticism, to the point where I'm probably more likely to get carried away with enthusiasm for somebody else's pet project rather than my own pet project. That's been the case in every cutting-edge area of scientific research that I've ever been involved in: Quantum computing, photonic bandgap materials, nanoscience, imaging beyond the diffraction limit, and anti-angiogenic therapy. All of these are hot subjects with lots of potential and considerable hype, yet working in these fields has made me realize how far we have to go. (Quantum computing, which I worked on for about 6 months and collaborated on one paper, has gone a considerable way since the time when I was involved.)
So I figure that if a person is really immersing himself in a field then he'll learn enough to become a little more sober. If somebody doesn't become sober about a subject that he claims to be following very closely, then I have to wonder how well he's understanding the science.
And when that same person remains intensely skeptical about certain other subjects, and when the differential enthusiasm and skepticism just happen to coincide with proclivities and sympathies that are common among libertarians, well, it raises certain questions.
Still, I give Ron Bailey credit for two important things:
1) He has changed his mind on a big issue and admitted so publicly.
2) He comes here to interact with his critics.
Despite my differences of opinion with him, I respect him for those two very significant things.
thoreau | August 5, 2006, 1:43pm | #
Stuart-
The question is whether
Reason's coverage of science, technology, medicine, and the environment is driven more by ideology than data.
Here's the thing about ideology, skepticism, and science: Selective application of skepticism is fine if we're talking about policy rather than science. Consider these assertions:
1) Molecule X causes cancer.
2) Molecule Y kills tumors.
3) Molecule X should be banned.
4) Molecule Y should not be regulated.
The first two statements should be regarded with equal skepticism: We want more data. We want to see the results replicated by an independent group. We want the data tested by a different statistical method. We want the data examined to see if it is also consistent with an alternative hypothesis. And so forth.
This equal skepticism should be the same whether you're a Democrat, Republican, Libertarian, Independent, Perotista, Objectivist, whatever the hell you are.
The third and fourth statements, however, might be evaluated in light of ideology, since they are policy prescriptions rather than observations about the natural world. If one is a libertarian, then naturally a call for banning molecule X will meet with skepticism, if not outright dismissal, while a call for allowing people to buy and sell molecule Y will be met with great sympathy.
I expect libertarians to take a libertarian approach to policy, and I expect
Reason to take a reasoned approach to questions about the natural world.
Thought experiment: Imagine that a study comes out purporting to find that smoking marijuana increases the odds of coming down with some nasty disease. Let's even suppose that the data is pretty solid, and the study is soon replicated and supported by other lines of inquiry. The drug warriors take this as proof that prohibition is necessary.
What's the best approach for a libertarian publication to take?
I would expect the libertarian publication to be open to the possibility that the data is correct, but suggest that prohibition is the worst way to deal with the negative effects of marijuana. I might even excuse a bit of lingering skepticism about the data.
I would be disappointed if a libertarian publication's strategy on the issue mostly involved harping on every remaining open question concerning the data. And I would be especially disappointed if the same libertarian publication gave uncritical coverage to, say, questionable claims made concerning alternative medicine.
sam | August 7, 2006, 1:29am | #
"it is possible to come to a conclusion that natural causes can warm the earth to temperatures above those that exist today."
but it is necessry for the skeptics to come up with both an alternative theory to explain the
current warming, which is not necessarily natural; and show how the prevailing theory completely fails to explain the current warming.
in the first part, skpeptics have some vague idea that some natural force or other is somehow acting up, an in truth during the first half the 20th centurym the sun did warm up ...a little bit. This is actually included in the current models, but in no way appears to overwhelm the influence of CO2 and other Greenhouse gasses.
In the second part, as I already linked to above, there has been a century of research on the warming influnece of CO2; no sceptic has been able to show that the whole body of knowledge is in any significant state of error. What is said is that CO2 is such a small part oif the atmosphere that an increase shouldn't have any significant effect at all.
In this respect there is a misunderstanding of the basic feedbacks involved. As you can see here:
http://en.wikipedia.org/wiki/Earth%27s_atmosphere
The vast majority of the atmosphere is Nitrogen and Oxygen, almost totally permeable (99%) to radiations from the sun and the earth's reflections thereof. Of the 1% that affects anything, CO2 is 3.5% at 381 ppmv; a more powerful gas is CH4 (methane) at 1.745 ppmv, 0.01745%; Ozone, makes up 0.0 to 0.07 of the atmosphere, depending on region, ie the Northern Hemisphere industries sustain Ozone in the air above it; chlorofluorocarbons are also notable; the most powerful gas is watervapor, around almost 99% of the gasses which affect the globes temperature, and is the strongest at affecting heat. It is important to note that while 99% of the Earth's gasses don't trap the Sun's heat, 70% of the Earth's surface does. Water vapor generates 36% of the greenhouse effect, but C02 is 12%. So on the face of things it would
seem that the critics have a point, that altering Co2 would have little effect on Warming...
The thing they miss, sometimes it seems deliberately, is that water vapor imbalances have a residence time of under a week.
It rains out when there is too much.
Ozone generates 3% of the Greenhouse effect, but lasts hardly at all...the only reason it is significant is that we keep pumping o3 into the air.
Whereas C02 imbalances have a residence time of centuries. It doesn't rain out... or otherwise disappear easily. It continues to keep things warm. Most importantly, it keeps watervapor warm generating a feedback loop which keeps more watervapor warm until an equilibrium is reached.
What this means is much like the relationship between your foot and the engine in your car. Your foot is nowhere near as powerful as the engine in your car. But the car isn't going anywhere without your foot pressing the gas pedal. CO2 is the global 'lead foot on the gas pedal'. You remove the 'foot' and the water vapor 'engine' cools and the global 'car' cools. Add too much 'foot' and the 'engine' risks overheating and/or 'crashing' the 'car'.
lunchstealer | August 7, 2006, 2:16pm | #
Oh, and Joshua, with respect to nitrogen and oxygen being greenhouse gasses, this is incorrect. A gas is termed a 'greenhouse gas' if it has a higher visible-transmission/thermal-transmission ratio than the N2-02 mix that dominates our atmosphere. They are not greenhouse gasses by definition. In any event, CO2, water vapor, ozone (O3, not O2), and methane are
sooooo much better at trapping energy than N2 and O2 that even a small amount - even 0.035% - in any of their levels in an otherwise pure nitrogen-oxygen gas will greatly increase its opacity in the thermal bands. So when compared to real greenhouse gasses, N2 and O2 would never be considered greenhouse gasses. Argon's greenhouse power is also negligible by comparison to the 'real' greenhouse gasses listed above.
To quote from a Scientific American article:
"Nitrogen, oxygen and argon together comprise more than 99 percent of the atmosphere. None of these three gases [significantly*] absorb either visible or infrared light; both types penetrate the entire atmosphere. It is as though, when it comes to the absorption and emission of light, the atmosphere’s three main components do not exist!"
*I added the word "significantly" because while their permeability is very high in these spectral bands, it is not infinite.
CO2, H2O, N2O, O3 and CH4, are all greenhouse gasses. Atmospheric nitrogen (N2), oxygen (O2), and argon are not.
sam | August 7, 2006, 9:37pm | #
Just to complete my beliefs a little better, I am going to expound on one point. Earlier I wrote that the Earth's surface captures a good deal of energy, some 70%. Most of this energy is more or less slowly released in some form or another, keeping the planet livable.
That 70% is variable. If there is a notable reduction in temperature (from orbital, solar, or gasseous or other changes) then bright white ice sheets tend to form, reducing the amount of sunshine collected, making things colder still, until an equilibrium is reached. Often these ice sheets will form over water and stay for the winter, and more or less go away in the summer. If they form on land and stick around, this lowers sea levels. Most of the sunhshine the Earth collects is in the oceans, as water actually holds heat better than rock and soil. So when Ice Sheets form over land, the effect is twofold.
Conversely, if there is an increase in temperatures for whatever reason, the ice sheets melt, reduing the earths birghtness. Over the oveans, this absorbs more sunlight, warming things further. And Ice over land that melts increases the area of dark ocean water, whichh absorbs even more sunshine. Until an equilibrium is reached.
In terms of my automobile analogy, this is like linking the gas pedal to the brake, such that when the driver's foot lets up on the gas, the brake is automatically engaged, slowing the car, instead of just drifting. Pressing the accelerator lets up on the brake. This means that even very small changes in any one of the several climate change factors can have very significant effects on the climate. If the Driver is too quick with the foot, the ride will be jerky; but if gentle enough it is manageable. The Driver BTW is the Earth's ecosystem...not really an Earth Godess, just living things collectively responsive enough in a mindless mob kinda way to adapt and brake/accelerate as mostly needed.
Due to Milankovich cycles, and changes in the Sun, the Road itself can be bumpy, and the Driver isn't always able to respond perfectly, and so we have Ice Ages.
What we have now is an opportunity to make the Driver better at adapting to changes in the Road. Or careen wildly out of control, like some drunken teenager in a poorly modded hotrod...which oddly reminds me of a certain rather cool Invader Zim episode.
Q: "Why turn your home planet into a hotrod?"
A: "It's just so coool!"