Paul RakoTechnical Editor Paul Rako looks at analog technology in power supplies, interface, the signal path, and life in general.



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Wednesday, July 23, 2008

Politics, faith, and the engineer

Jul 23 2008 12:09PM | Permalink |Email this|Comments (21) |


Our esteemed competitor EETimes has an editorial about intelligent design and global warming. Kenton Williston points out that Darwin and the theory of evolution is settled science and so is global warming theory. By this he must mean anthropogenic global warming (AGW) because he says we have to do something and do it good and hard or disaster awaits. He points out that some engineers have the temerity to doubt AGW and he condescendingly feels sorry for them, since they are obviously being as unscientific as the people that peddle creationism and intelligent design.

Before I add my two cents, I would like to point out a little foible in his strawman. Now, I am a Darwin guy 100%, but lets’ face it, if you push and push and push on science you go to physics and then past relativity and quantum mechanics to get to--- superstring theory. Nice theory, actually it is hypothesis. A lot of nice math. A lot of idea people. But there can be no possible testing of the hypothesis and therefore no science. Sorry, it bothers me too, but since we can’t test superstring theory it is indistinguishable from the religions that say God snapped her fingers 10,000 years ago and everything came into being just as it is today.

Funny thing is that, faced with the same facts as Kenton Williston, I draw the exact opposite conclusion. In fact AGW is far more a religious movement that a scientific one. Now please, before you greenies start foaming at the mouth and bite out chunks of the carpet, I am not saying climate theory is religious, or disputing the fact that the world certainly seems to be warming. There are tons of good science going on that examines the relationships of CO2, water vapor, cosmic rays, volcanic activity, asteroid impact and sunspot activity on global climate. But there are two religious wings. One is the global warming skeptics that think that absolutely nothing is going on and that we should not even care about these issues. The other religious wing is the global warming alarmists, who make a very tortured leaps of faith to come to the conclusion that not only should we do something, we should do just what they want us to do and do it right away.

I do agree with Mr. Williston that engineers should add their voice to the discussion. This is especially true because if the world adopts all the proposals of the AGW alarmists, then you can expect to spend at least twice as much for gasoline and natural gas and you can also expect to spend twice as much for electricity. In addition, the cost of every single manufactured good should go up about 25% due to the higher cost of energy. So what do we know for certain about anthropogenic global warming? Not very much for sure.

Lets go over the basis for AGW.

1)      CO2 concentrations have gone from 300ppm to 400ppm in the last century.

2)      That increase is due to human consumption of fossil fuels and burning forests.

3)      The increases in CO2 from 0.03% to 0.04% is triggering much larger increases in water vapor.

4)      The increase of CO2 and water vapor in the atmosphere that block infrared radiation out to space means that the equilibrium temperature that can radiate heat out to space is at a higher altitude.

5)      The higher altitude of the equilibrium sphere means that surface temperatures have to be hotter.

6)      The world’s climate is demonstrably getting hotter, by about a degree in the last century, so all the above is true.

7)      There are one or more tipping points, positive feedback mechanisms, that once passed will cause massive climate change and that may well destroy the human race.

8)      Hence it is a simple fact that mankind is causing all the earth to warm and if we don’t do something right away we are all going to kill our grandchildren.

Nice, but first off, it is not a theory. It is a hypothesis. See a theory is built up from a whole series of hypotheses that have been proven experimentally. There are a lot of things wrong with AGW, but the most glaring is that it is not science, no more than intelligent design is. They are both broad sweeping hypotheses that have not only failed experimental testing; real-world results often contradict the stated hypothesis.

When looking at the individual steps in AGW (and I include the doomsday scenario since it is such and inherent part of the AWG proponent’s claims) they all seem pretty reasonable, and even a bit scientific. Some I would consider indisputable facts. Certainly number 1 and 2 are pretty pat. But the fascinating thing is that even those very obvious statements are subject to observable contradictions. For instance, looking at the CO2 increase superimposed on the temperature increase in the last 100 years you can see that the temperature increase seems to precede the CO2 increase. One hypothesis is that the higher temperatures of the earth are forcing CO2 out of the ocean. Well, I am an analog guy and even if CO2 sequestration is a very little understood part of the whole AWG hypothesis, we have to assume that if we burn billions of tons of CO2 into the air, it will surely push the equilibrium point to where there is more CO2 in the air. After all, we just pumped it out of the ground and burned it, so one would expect there to be more CO2 in the air.

There are other seemingly pat observable facts that are not really so pat. Take my #6. Yes, the climate has gotten warmer, but it seems to have stopped after 1998. From really good satellite data, the trend line levels off. This contradicts global warming hypothesis but supports the people that say that sunspot and solar activity is the dominant effect on climate. The global warms alarmists have cobbled up another kludge, they say that it is the particulates, yeah, that is the ticket, the particulates have caused the temperatures to level out, but once we clean up our diesel cars and coal power plants than bam, turn it up another notch—we will veer back to a certain catastrophe.

Now I am an analog guy, I can deal with shades of gray, so I am pretty certain the climate will not stay the same and I am pretty sure the climate skeptics and climate alarmists are both wrong. First off, the fact that the earth is getting warmer is no big surprise, after all we are coming out of an ice age. Did you know about Milankovitch cycles? Check them out, the precession of the earth causes a lot more climate change than CO2 apparently. And don’t forget to watch the lecture from Art Robinson where he shows that sunspot activity and warming trends have a correlation coefficient of 0.92.

When I look at my list above I am pretty much in agreement with the first 6 points. Oh, and do be sure to understand greenhouse theory—it is not like a flower greenhouse, it is much more fascinating and Mr. Williston is right, Fourier discovered it in the 1800s, but that is one small crumb of science in the religious madness that is AGW. As a recent commenter to the EETimes article, Kyle The Zombie Killer, noted:

As an engineer, you should understand that stable systems are generally dominated by negative feedback. This contradicts the basic assumptions of the alarmist viewpoints espoused by James "tipping point" Hansen and others. Please refrain from using wikipedia links as references. Arrhenius' musings of 1896 predate all of modern physics. Planck's work on blackbody radiation took place several years later and he won the Nobel Prize for this work in 1918. Spectral lines were not fully developed until 1913 by Niels Bohr, who won the 1922 Nobel Prize for it. Longwave infrared does not escape to space from Earth's surface, but instead radiates away from high in the troposphere. That's the foundation of modern GHG models. There's little water vapour up there because it's so cold, so CO2 is presumed to be the main far-IR radiator at that altitude. The assumption of GHG models is that IR will need to be radiated from ever colder regions of the troposphere as CO2 levels rise. Therefore, less energy will actually be emitted, since the temperature is lower. To find the equilibrium in this model, you have to increase the temperature of the Earth's surface such that assuming a constant "lapse rate" (this is the rate at which air gets colder with altitude) you get the same IR-out as you did with other values of CO2 concentration. Other energy transport mechanisms, notably convection and cloud interactions are neglected. Herein lies the trouble.

See, where I have to say thing are getting wacky is the when people start spouting off the latest code words for greenies trying to prove they care more about the world than I do. The tipping point. Now I worked in the amplifier group at National Semiconductor and have designed several servo systems. Positive feedback is a very rare thing. What’s more, if the positive feedback in our climate system was as delicate as the alarmists say they are, we would have all died off millions of years ago. The earth is at a pretty stable place in its development, as you would expect from an extremely complex system. Complex systems just don’t go twang and veer of into catastrophe, that is religious millennial thinking, something that must appeal to the human mind since it has been used by religious figures for millennia in order to get people to obey the leadership. In 1000 years, stopping our use of fossil fuels at this time will be looked at as being as savage and stupid as the Aztecs cutting out people’s hearts to insure the sun comes up the next day.

OK, what else bothers me about AGW? Well, the big deal is that they substitute computer simulations for experimental confirmations. We analog engineers have been dealing with SPICE and if a 100 billion dollar industry cannot come up with a three pin transistor simulation that always works, well don’t expect anything as complex as climate to ever be modeled with a computer. After all, as has been noted, if you are going to simulate climate you have to simulate weather and to do that you have to simulate the turbulent fluid flow equations of both the atmosphere and the oceans. No model even attempts to do that, so don’t expect too much from computer models, just like you should not expect too much from SPICE.

Other things that make me wary of AGW are that they have been consistently wrong. The same crowd was predicting global cooling 20 years ago. Their temperature-rise predictions have uniformly been off by octaves if not decades. And the tipping point catastrophe scenarios are obviously being voiced by people that have no concept and no formal training in control theory or feedback mechanisms. The AWG crowd came up with the famous “hockey stick” graph that showed we are at the warmest in history. It was based on a terrible analysis of data. The medieval warm period was far warmer. Here is Al Gore’s response. And a rejoinder. Indeed, please don’t quote me anything that comes from the IPCC. That is like asking the Pope what religion is best. Similarly I am not too interested in what skeptic MIT professor Richard Lindzen says either. But there are a lot more James Hansens then the are Lindzens, and they all need to be tuned out.

But one thing is certain; the alarmists sure are predicting doom. And the only thing worse than their science is their solutions. Al Gore wants to eliminate fossil fuels use by 2050. Look at this. Now, if you are an engineer, tell me that Al’s suggestion does not sound like any other marketing BS you have heard by the management elite. At best Gore is an attention whore and at worst he is clinically insane. We know he is a hypocrite because he is not doing webcasts, he is jetting around the world and burning a couple hundred kilowatts per month at the mansion. His movie is docuganda and you can find a point-by-point refutation here.

And that is the real trouble, these AGW proponents are so strident and so earnest they think is it OK to lie and tell falsehoods because they are so sure mankind is destroying itself. They have to lie because they know, they just know, we are so stupid and only they have received the Truth. They have received carbon into their lives. Everything is the end of the earth, but they have cried wolf so many times reasonable people are getting tired. Remember when the AWG crowd said the North Pole was going to melt and flood the earth? Well guess what, the North Pole is floating ice so when it melts nothing happens to the ocean’s level. Except that is not quite true, see, the ice is fresh water so it will raise the level a tiny bit, but not the gross amout claimed by the AWG crowd. We remember the prediction of doom but never the refutation. And we never remember any analog subtleties in the argument where both sides are a little right. If you want to know how the holocaust could happen in Germany just look at the hysteria about AWG and you can see how things get really crazy really fast.

Mr. Williston over at EETimes says that people that don’t believe in global warming are just like the people that don’t believe in evolution. Well science is not a democracy, and just because a bunch of journalists and politicians believe the world is coming to an end and we need, surprise, more taxes, that does not mean there is not some decent science on both sides of the issue. In addition to the petition by 31,000 scientists challenging AGW, there is this batch of physicists that thinks maybe we should calm down and be a bit more scientific.

Now the greenies I like to have fun with green-baiting are really good decent people and you have to salute them for caring about the planet. I too care about the planet. But accessing the risks to our civilization, here is the real list we need to worry about:

1)      The bankrupting of our economy by Social Security, Medicare, Medicaid and prescription drug entitlements.

2)      The horrible lack of rational water policy in the US. We give water to big corporations to grow food in deserts. We need to charge people for what water costs and get a bunch of it from Canada and at least reload the Ogallala aquifer.

3)      We have to stop eating bait and go back to eating fish. This means an international agreement to protect and conserve our oceans as well as a lot of domestic preservation policy.

4)      Local governments have to be subject to strict water pollution laws, the sewage plants are still poisoning our rivers.

5)      We have to charge people for what electricity really costs. I don’t think CO2 is a pollutant but we sure should be talking the methyl mercury and acid rain out of coal plants before we worry about CO2.

Then after we spend money to fix all these problems, maybe 50 or 100 years from now, we can look at climate change from a more rational perspective. One thing that may really irk people on both sides of the issue is that the effects of humans on climate change may be unknowable, just like the superstring hypothesis may never be proven. Some things do approach god and some things may be too complex to understand. You know how the climate alarmists have conjured up particulates into their precious models to prove that they were right all along, so don’t be surprised if they never do accept that they perhaps overstated things a tiny bit.

As I said, I am neither a climate skeptic nor alarmist. I am a climate realist and an analog one at that. I do think most every hypothesis proposed by the global warming crowd is somewhat correct. Humans are making CO2, the CO2 is leveraging water vapor. That is increasing the average temperature. But where we diverge is in the analog nature—they are digital—if anything changes a little then it is doomsday. I think a degree or two of temperature increase by 2100 will not do too much damage and may have quite a few benefits, since CO2 promotes plant growth and warm is better than cold for human beings. Do not let the former Marxists that dominate the political component of global warming activism use a hypothetical scare in order to shut down global capitalism. Of that I am sure, we are better off with capitalism and a little warming than communism and equality of outcome, with the whole planet living in squalor since we can only add as much CO2 to the air as we breathe.

BTW—here is a little fact. The average American generates 22 tons of CO2 per year. Each human has about 792,000 tons of atmosphere. But if the IPCC has their way you will only be able to generate in a month what you used to generate in a day. You won’t be able to have central heat, a car, and the CO2 you breathe out will be a large portion of your CO2 allowance (after Seitz, Carbon-based Prohibition, not yet on the web).

Is there any hope? Will there be any science that helps us to figure out if we are going to cause a catastrophe? Well, sure, that is the great thing about science. I will be looking to climate paleontologists, ice-core samples and planetary exploration. Did you know about the Paleocene–Eocene Thermal Maximum? It used to be way way hotter—the thing we should be studying is global cooling. That is the real disaster scenario, not a couple degrees temperature rise in a century. By listening to scientists that have a million-year view on climate, we may better be able to put in perspective what is happening in the next 100 years, and just what, if anything, we should do about it. Now get back to work.


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Reader Comments



at 7/23/2008 1:48:10 PM, A. Viirlaid said:
Thanks Paul, Great article!



at 7/23/2008 8:04:05 PM, Walter Manny said:
Spot on, but a bit disingenuous, perhaps, in your dismissal of Lindzen, who has been making most of your points for years and will end up being a hero of the wake-up crowd should one ever form. If not disingenueous, then hand-wringingly balanced in your attempt to placate those who are certain to ignore what you have to say in any event, you having correctly exposed their religious fervor -- they don''t like that. Try Gavin Schmidt on the topic. Lindzen is a heretic-scientist who has had the courage of his convictions from the beginning.



at 7/23/2008 10:49:15 PM, Jim said:
Awesome dude. I am a skeptic and an engineer. I don''t buy the IPCC AGW BS take on things, but I agree we do need to do things differently. Stuff like reduce emissions simply because they''re nasty, and work towards engineering a better urban layout where you don''t need to drive to work to afford your house. The thing that scares me is what happens if we can''t sustain the current food production model. Oil based industrial food production currently generates most of our food. Tractors, harvestors, distribution, etc... If oil is eliminated from the equation then what? Time to buy a gun, that''s what.



at 7/24/2008 12:26:19 PM, Meredith Poor said:
Ammonia can be used as a fuel, particularly in tractors, trucks, and locomotives. It has about half the energy density of gasoline, or roughly the same as propane. It can be produced from the electricity of wind turbines or solar panels. There is NO CARBON in ammonia (NH3). Producing it with renewable energy technologies, particularly those located on farmland, would short out the fertilizer issue as well. And you might use the NH3 to make an explosive charge for your gun.



at 7/24/2008 2:05:41 PM, Law said:
2. That increase is due to human consumption of fossil fuels and burning forests. I suggest everyone take a look at the CO2 records in the deep ice packs over the last 100,000 years ... significant ups and downs are observed in CO2 ppm ... remember we think very few humans were here during that era. Mankind appears to be playing only a minor role in the real world of global warming ...



at 7/24/2008 3:17:24 PM, Brett Bowden said:
Law - You forgot to include the link to the data: cdiac.esd.ornl.gov/trends/co2/vostok.htm "The extension of the Vostok CO2 record shows the present-day levels of CO2 are unprecedented during the past 420 kyr."



at 7/24/2008 3:17:41 PM, Michael said:
Paul appears to have been an engineer in the past. He should know that very few people are experts in a field in which they do not specialize. A climate scientist he is definitely not. So why is he spewing out volumes of stuff he knows so little about? Good question. BTW, the climate scientists are not talking about rising oceans due to loss of the polar ice cap. That''s a ridiculous argument since ice is less dense than water and hence anything below sea level melting would cause the ocean level to fall. If Paul actually listened instead of ranting, he would have heard Greenland ice sheet. Yes, that big glacier is starting to go, just as those in Alaska, Glacier National Park, and throughout the world have been doing for a while. When the Greenland ice sheet goes, look out NYC. That''s because that ice sheet is above see level. Hmm. Maybe Paul should have actually thought about this before exposing his ignorance. He can go on and stay blissful and assume there is nothing that needs to be done. Most of us buy insurance just in case - for our car, liability, etc. - just in case.



at 7/24/2008 3:37:21 PM, Dave S said:
One factor not usually considered in the build up of CO2 is the interruption of the carbon uptake by plants by pollutants. i.e. acid rain stunting growth or killing off plants. More than just producing CO2 has to be considered.



at 7/24/2008 4:23:31 PM, RealScience said:
Paul - a more balanced viewpoint this time, but two mistakes, one silly and one serious. The silly one: I''ve been following the climate debate for four decades and I never heard this ''sea ice melting raising the sea level'' stuff in all that time. The worry is that the sea ice melting reduces reflection and warms the air, increasing the rate of Greenland ice melting. The serious one: Earth''s climate has had large and rapid swings in temperature before (such as ice ages, 1000-year cold snaps that start in a decade, etc.), which are typical of systems with positive feedback. A key danger for heating is methane, both from arctic bogs and (potentially the most troublesome) from destabilizing under-sea clathrates. Likewise on cooling, glacier grind up lots of rock into very fine dust (the fertile soils of the great plains are the dust from the ice-age glaciers), and when this blows into the oceans it fertilizes them, leading to massive increases in CO2 uptake and plankton (which is why whales were 10x more plentiful during the ice ages than when humans started hunting them on a large scale. So be a realist and change your tune on the likelihood of positive feedback! On what to do, you are right that WE DO NOT KNOW how much of the warming is due to us, and how much is being done to us by other factors. But that makes it MORE important to learn what we can and to be ready to take control of the earth''s thermostat. A 20-foot rise in sea level would make New York, New Orleans, Miami, Washintow, Boston, etc. very different places. And on the other extreme, a single ice-age can ruin your whole day! So we should be ready to either suck vast quantities of CO2 out of the atmosphere to keep the planet cool, or to release large quantities of methane if it turns out that we need to keep it warm. And in the mean time, we should dump massive computing resources on figuring out how much of this we would have to do to stabilize the climate against either ourselves OR natural forces.



at 7/24/2008 4:45:42 PM, Spring is BACK said:
Brett wants to go back 420k years - that's nothing. I say go back 40 million years (or more). The climate record shows a pattern of deepening, and pretty darn abrupt, cycles, ever since the Himalayas formed, and even more so since the Isthmus of Panama formed. And... the overall pattern is... colder. What we have right now is a very brief, relatively pleasant respite called an "interglacial period" in the middle of a long term and apparently strengthening Ice Age. In that sense, I have to disagree with Mr. Rako: The Earth's climate is NOT particularly stable at this point, unless you consider a consistent pattern of utterly wicked cycles, with an overall downward trend, "stable". Further, and, I have posted this before: if you study the curves over many millions of years, it appears we are overdue for another steep plunge. In fact, it rather appears that something (or someone) is extending the present interglacial. I am most certainly NOT sure, but my guess is that there is at least a 50% chance that Man is, completely by accident, extending a beneficial climate for him (and her) self. I am not saying that CO2 emissions should not be reduced, or that we should not move away from oil at a steady pace. But, I AM saying that IF it was actually possible in a few decades to get all of humankind to drastically reduce CO2 emissions (without killing off a few billion of us in the process), the eventual result might kill off SEVERAL billion of us. That's some pretty dicey stuff... Anyone who hasn't studied those curves, should. (Hey, starting at Wkipedia is better than nothing.) Those climate records of many millions of years and more are EXACTLY the sort of information engineers are fascinated by,and can use to help make rational choices.



at 7/24/2008 5:15:03 PM, Spring is BACK said:
Hey, Real Science, I am in agreement with you on SOME items, but - a couple questions: How long has it been since Greenland was green? (I already know - that''s sort of a rhetorical question, actually.) If indeed precession of the earth and sunspot cycles either have more effect than CO2 and methane cycles, or perhaps work to catalyze the latter, then maybe we should actually be thinking of ways to either slightly parasol the earth, OR, send more sunshine our way if it starts getting colder? The idea of dumping or collecting massive qty''s of CO2 and methane seems much more risky to me. And possibly harder. Slightly shading the earth is something you can undo MUCH more quickly, if it turns out one''s projections were in error. It seems to me that what happens with climate cycles is that perhaps there are, in effect, relatively short periods of time where positive feedback can occur, but there are larger bounds that help keep the system from getting a LOT more out of whack than, say, the few last major cycles. Therefor, based on the last 65 million years or so, I find it moderately unlikely that current human activities can cause a temperature spike that can result in the magnitude of trouble that even the next normal (and overdue) plunge would cause. I''ll grant you that we are in unexplored territory on what would happen if a plunge follows an artificial extension of an interglacial period, but, hopefully we may have some means of control by then. Of course, 1000 years is an "eyeblink" in all this -- but it''s a long time in human advancement. If we can keep Earth a reasonably nice place to live for anywhere near that long, then (by then) we really should be far enough advanced to be OFF this rock, and can let it go back to it''s own devices.



at 7/24/2008 5:27:08 PM, Spring is Back said:
Now, just to counter my own argument on positive feedback, I'd have to say that events such as the formation of the Himalayas and the Isthmus of Panama HAVE altered the pattern that existed prior to their existance, and that pattern continues to alter (overall trend of deepening cycles and colder in general.) So, perhaps they should be considered a form of VERY significant positive feedback? There is also that Paleocene–Eocene Thermal Maximum that Mr. Rako mentions - a truly amazing climatological event, and definitely something I don't think I want to experience!



at 7/24/2008 5:30:14 PM, John said:
I enjoyed this one... very thoughtful and good feedback from others... My thoughts are focused on people''s (in general) perspective on "science"...Namely, what you pointed out. That science is what we understand - now. It can be another form of religion when used in inappropriate ways. I do not find any conflict in science vs religion.. Just differing perspectives on the world and our purpose in it. At some point - both involve faith... it is just more obvious in one vs the other. I was told a funny story of "science" a few years ago. It went like this: a paper was circulated a few hundred years ago stating "Hemp grows on Mars". The logic (science) was... Mars has canals, canals have boats , boats require rope, rope is made from hemp... there must be hemp on Mars was the conclusion!



at 7/25/2008 8:10:31 AM, Meredith Poor said:
"How long has it been since Greenland was green?" The Vikings named it Greenland as a real estate marketing ploy. This was designed to encourage settlers to move there around 1000 AD. Nothing has changed, has it?



at 7/25/2008 9:55:40 AM, Steve S said:
Sounds like the rantings of someone trying to justify his Hummer. In a more serious vein, here's how I look at it. If the alarmists are wrong, we will spend more and maybe slow down any increase in our standard of living by reducing our energy consumption and moving away from fossil fuels. Not desirable, but by no means a disaster. If the nay-sayers are wrong, we can all kiss our a---s goodbye.



at 7/28/2008 11:05:25 AM, Darren Holdstock, UK said:
Climatology might be an analogue discipline, but it ain't linear, and engineering analogies go about as far as comparing water flow to electricity. Ask a mathematician with a strong non-linear system bent and a penchant for chaos, and you'll get a more accurate if less comprehensible answer. And positive feedback is everywhere in weather and climate, so please don't be shutting off the Gulf Stream, we need it to keep the polar bears out of London.



at 7/28/2008 11:27:13 AM, nwz said:
Paul, good article in general. I many not have agreed with every point, but your main thrust -- that we need to take a more pragmatic and less dogmatic (by both sides) look at climate change is spot on. Related to your comments about feedback, you may want to have a look at this. www.dailytech.com/Researcher+Basic+Greenhouse+Equations+Totally+Wrong/article10973.htm For those who complain about engineers or scientists or even lay-people opining on the science of global warming if they are not in fact climate scientists, don''t fall into the trap of relying upon authority, rather than fact or evidence, to justify your conclusions. Once you cross that line, you''ve moved into the realm of faith, which may or may not have anything in common with truth. The complex models underlying climate analysis rely upon mathematical techniques employed by many disparate areas of enquiry, and it would not be as difficult as you might think for non-climate scientists to understand what the models were designed to address, and most importantly, whether the underlying assumptions and boundary conditions are both reasonable and reflective of reality.



at 7/29/2008 11:41:19 AM, RealScience said:
Greenland was a bit greener around the edged in the period about 1000 years ago, but is has been millions of years since it was green all the way to the middle. Shading the earth in space (or reflecting more light to warm it is great except for the LAUNCH COSTS. If a carbon-nanotube (or rolled graphene)space elevator gets built, then it would indeed be practical. For shading, the other choice would be to capture a near-earth asteroid such as 99942-Apophis and grind it up... but that would be far less reversible than adding or removing CO2. There was also a good article in Sci.Am. a few years back on agriculture and especially rice farming preventing us from sliding into the next ice-age starting several thousand years ago. Sure, the Himalayas and Panama (and Antarctica) may have been the proximate cause of the recent millions of years of cooling, but my take on the long-term cause is that as the sun has gotten hotter over the past billions of years, the earth has pulled more and more CO2 out of the atmosphere to keep the planet cool, and there is now not enough left to properly regulate the temperature, and thus the wilder swings earth has experienced of the last tens of millions of years. Without a creature as smart as humans, life on this planet has only another 600 million years due to the sun heating up, and so life would be almost 85% over! But we'll figure out how to nudge the earth's orbit larger at the rate needed to get earth another 3-4 billion years of the climate range we were born into...



at 7/31/2008 7:54:45 PM, P.H. Williams said:
Paul – nice piece, I appreciate your healthy skepticism of the anthropogenic global warming “religion.” Al Gore’s technical credentials are laughable, and he is obviously in it for the money and notoriety. (I’ve had him pegged as a delusional narcissist since the day he claimed to have invented the internet!) So if we want the truth, it falls on the objective scientific and engineering community to root it out. The real question is not IF the earth is warming (just get all the data), but WHY the earth is warming. The latter relies on INTERPRETING the data, something that the alarmist activists are inherently poor at doing. Yes, string theory is a THEORY (sort of), just like people-caused global warming is a THEORY, and Darwinian evolution is a THEORY. And yes, all theories are based on data (some more than others), but that is where all the dissension begins: Assuming we have all the pertinent data at hand (a big assumption), then we can begin to interpret and draw conclusions from it. But there is a problem at this stage, since the result depends on the interpreter’s world view. For the global warming alarmist, the world view is “People are bad for the planet, it is obviously their fault!” For the evolutionist, the world view is “Obviously we weren’t created, so we need to figure out how we got here!” As for the string theorists, the world view is “Just because we can’t prove it doesn’t mean it’s not true!” – a view I happen to agree with by the way… :-) Henri Poincare, a late 19th century mathematician & physicist said it yet another way: “Science is facts; just as houses are made of stones, so is science made of facts; but a pile of stones is not a house and a collection of facts is not necessarily science.”



at 8/1/2008 7:53:33 AM, arclight said:
All: I''m with PH Williams on this. We can collect data and get to some real answers about what is happening. We are going to struggle a lot more with why, because it is indeed affected by our worldview, and that worldview includes our views on man, his works, and our desires for his future. The ongoing conflict over evolution vs. creation is a smokescreen as far as I am concerned. A good portion of the strife that question creates can be traced to (a) a misunderstanding of what science is and is not, (b) unwillingness on the part of the scientific community to clearly state what the limits of science are, and (c) a willingness on the part of far too many people to attempt to use the power of the state to coerce others (particularly small children) into believing or not believing as they wish. This last is the largest part of the problem by far. Science cannot factor the actions or non-actions of a Supreme Being into the math equations that are at its heart. As a result science is forced to assume that there ARE NO SUCH ACTIONS to be dealt with. There''s nothing wrong with that, as long as that assumption is clearly identified. The difficulty comes when the science community is unable or unwilling to admit that and explain what that means in considering the question under study (e.g. evolution vs. creation). It''s interesting to note that the National Academy of Sciences has a long paper on evolutionary theory, and not until the last page of the writeup do they mention that science isn''t really suited to deal with the actions of a Supreme Being. Why wasn''t that clearly stated up front? Fix that problem (easy to do if folks are willing to do it) and (a) and (b) are easily dealt with. The issue of folks using the power of the state to coerce others into believing or not believing as they do or don''t is not so easily dealt with. There are all too many folks on both sides of this issue and others who are not only certain of their position but who absolutely believe that their certainty should be enshrined in law. Paul''s reference to the willingness of some in the environmental community to lie about global warming because they are so SURE they have TRUTH is a related example that springs from the same warped roots. What all of these folks fail to realize is that behaving this way is one of the ways to set the stage for tyranny. The sad part about this is that those same people won''t look at history to understand what the probable consequences of their actions will be, measured over time. Stalin, Hitler, Pol Pot, and all the other mass murderers of the last century certainly believed that the state could support some beliefs and repress others...look what they did. Whether or not we go to that extreme, or just use our legal processes to oppress those who differ with us, the effect is still the same, and (at least in the US) we are not being true to our Constitution that proclaims that all are free to believe or not believe, and proclaim or not proclaim, as their hearts direct.



at 8/2/2008 5:35:04 PM, Joseph said:
Thanks for linking to my blog, BTW. I see you don't allow hyperlinks, otherwise I have posted a link to a more clear graph illustrating what is essentially the detrended cross-correlation of temperatures and CO2. Now, about your comment that "the climate has gotten warmer, but it seems to have stopped after 1998," I would point out that 10-year trends can deviate from the long term trend by about 2.5 degrees per century (take that as a rough confidence interval). That would be different for 20-year trends and so on. Don't count on global warming having stopped.

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