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Re: Ski resorts affected by climate change
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2006 CR = 2.33ppmv, which you've agreed could be as high as 3.33ppmv (even higher if we include the adjustment to globalize it). That equates to 26Gt CO2 (3.33 * 7.8). HC = 6.0Gt C, which equates to 22Gt CO2 (6.0 * 3.67) Therefore: NC = 26 - 22; NC = 4Gt CO2; The natural contribution of CO2 to the atmosphere is 4Gt. Therefore, the statements: "The net effect is that nature removes more co2 from the atmosphere than it adds." and... "Without human co2 emissions the co2 levels in the atmosphere would start falling." and... "any time period you want to choose shows a higher anthropogenic co2 emission rate than atmospheric co2 rise" are false. And I did it all without "human emissions [being] off by about 50%". In fact, I could show this relationship for 5 of the past 10 years: Deltas for Past 10 Years as Reported by MLO 1997 - 1.98 1998 - 2.95 1999 - 0.91 2000 - 1.75 2001 - 1.61 2002 - 2.55 2003 - 2.31 2004 - 1.54 2005 - 2.54 2006 - 2.33 Equally Possible Deltas for Past 10 Years When Adjusted For Errors 1997 - 1.98 1998 - 2.83 1999 - 0.53 2000 - 2.75 2001 - 0.61 2002 - 2.83 2003 - 2.83 2004 - 0.74 2005 - 2.83 2006 - 2.83 Note our equation will work out to a positive natural change with any CR>=2.83ppmv. Now, I know you're going to think I'm trying to pull one over on you, so I'll show you the math. If I had the raw data, I would use that. But the only source I've found for the actual annual mean CO2 concentrations as measured by the MLO don't match up with the reported variances on their web site! So, I must have the wrong data, but it sure looks like the right data. I wonder what's going on? Nevertheless, we don't need the actual data because we're only interested in: a) what are the deltas b) are the mean values from year to year reasonable given the error rate, i.e. do we have to change a measurement outside the range of error in order to arrive at the number we need to show the natural contribution to CO2 could be positive. So, we can start at zero, use the deltas from the MLO site, then make sure we're not changing any one measurement outside its respective range. Hypothetical CO2 Concentrations Given MLO's Deltas Year .......... Reported Delta .......... CO2 1996 - ........... 0 ........................ 0 1997 - ........... 1.98 ................... 1.98 1998 - ........... 2.95 ................... 4.93 1999 - ........... .91 .................... 5.84 2000 - ........... 1.75 .................... 7.59 2001 - ........... 1.61 .................... 9.2 2002 - ........... 2.55 .................... 11.75 2003 - ........... 2.31 .................... 14.06 2004 - ........... 1.54 .................... 15.6 2005 - ........... 2.54 .................... 18.14 2006 - ........... 2.33 .................... 20.47 There's no magic here, I just took the MLO reported rise in CO2, year over year, and applied it to a base year of 0 in 1996. Now that we have a baseline of what the possible values for each year could be, we can see what would happen to the variances if the measurements for those years were off by +/-.5ppmv. Hypothetical CO2 Concentrations Given MLO's Deltas Year ............. "Measured" CO2 ........... Possible CO2 ............. Variance 1997 - .................. 1.98 .................... 1.98 ......................... 0 1998 - .................. 4.93 .................... 4.81 ......................... -0.12 1999 - .................. 5.84 .................... 5.34 ......................... -0.5 2000 - .................. 7.59 .................... 8.09 ......................... 0.5 2001 - .................. 9.2 .................... 8.7 ........................... -0.5 2002 - .................. 11.75 ................. 11.53 ......................... -0.22 2003 - .................. 14.06 ................ 14.36 ......................... 0.3 2004 - .................. 15.6 ................. 15.1 .......................... -0.5 2005 - .................. 18.14 ............... 17.93 ........................ -0.21 2006 - .................. 20.47 ............... 20.76 ......................... 0.29 So, as you can see, part b) of our requirements is satisfied. No year varies more than +/-.5 from its "measured" amount. Using these new possible CO2 concentrations we get the new deltas posted above. Five of those years resolve to a delta of +2.83ppmv of CO2. This equates to an increase of 22.07Gt CO2 (2.83ppmv * 7.8). So, CR = 22.07. Plugging into our formula we get: NC = 22.07 - 22.02; NC = .05Gt Co2; There's also one other year which is very close to our 2.83ppmv cut-off (2000). Given the MLO data doesn't accurately reflect the entire globe, it would also be possible to make this year fit if we could figure out how far off from the global data MLO is. However, I'm willing to ignore it. Quote:
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Anthropogenic CO2 from fossil fuel burning and cement production: 5.0GtC Oceanic uptake: 2.8 Forest uptake: 1.0 Additional terrestrial sinks: 2.8 Total NON-Atmospheric storage: 6.6GtC Meaning all of the anthropogenic carbon from fossil fuel burning and cement production, plus an extra 1.6Gt, could be absorbed somewhere other than the atmosphere. Last edited by Cato; 02-01-2007 at 12:05 AM. |
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Re: Ski resorts affected by climate change
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Re: Ski resorts affected by climate change
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Take any year and the figures show anthropogenic emissions higher than the rate of co2 rise in the atmosphere. That is without the error rates. I pointed out that taking a single year, or the long 250 year period has problems with accuracy (ie due to the error rate) which is why I proposed using a 10 year period. 2006 saw over 28 billion tons of co2 emissions, while co2 rose about 18 billion tons. As you pointed out it is possible these figures are inaccurate enough to mean the rise is actually more than emissions. All that requires is that the total inaccuracy brings them more than 10 billion tons closer together. So in your example you have emissions being overvalued by 20%, and co2 rise undervalued by 40%. However while I don't think this is very likely at all, I do accept it is possible. Which is why I suggested using a 10 year period in which the error range cannot "meet" co2 emissions with co2 rise. So onto that.. Quote:
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20.76 * 7.8 = 162 gTC rise in atmospheric co2 10 * 22 = 220 gTC rise in human emissions So over that 10 year period NC = 162 - 220 NC = -58 So even though nature could be a net emitter in particular years assuming a overvalue for emissions and an undervalue for co2 rise, over 10 years these errors melt away and it becomes much clearer that nature is a net sink. The yearly errors could be seen as noise on an overall trend. Quote:
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The items and their uncertainty ranges are not independent. "Partitioning among reservoirs" adds up to 7.1 for a reason - it's exactly what anthropogenic emissions are given as. It's not a coincidence - the basis of the table is to divide yearly anthropogenic emissions into the places it ends up going, with uncertainty ranges for individual components. You can't, for example, set all the "Partitioning among reservoirs" items to the max of their ranges because that would give you 10.1, which is more than the max for anthropogenic emissions (8.2). That would be saying that out of 8.2 human emissions 10.1 of those emissions end up in those various places. That doesn't make sense. As an analogy the table is like this one: Total money given to someone: $10 (9-11) What they did with it (ie partitioning the amount given to them): Spent it on candy: $3 (2.5-3.5) Gave it away: $5 (3-7) Lost it: $2 (1-3) Clearly you cannot take all the maximums from the last list and the minimum from the first, and say they spent $15.5 of the $9 given to them. That does not make sense. Equally it makes no sense to say that the anthropogenic sinks took 6.6gTC of the 6gTC humans put into the atmosphere (and that would also violate the constraint that at least 3.1GtC has to be placed with the atmosphere) Quote:
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Storage in the atmosphere 3.3 (3.1-3.5) It has to take 3.1 of human emissions as a minimum. Note that if you are saying humans are emitting 6.6GtC + 3.3 into the atmosphere. That's what these tables correspond to. The tables are linked, not independant. You cannot take the low end of the first and the high end of the second. The individual items are not independent. If you set ocean uptake to the high end and forest uptake to the high end then you have to "sacrifice additional terrestrial sinks" for example, you cannot set them all to max. |
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Re: Ski resorts affected by climate change
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Global Monitoring Division |
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Re: Ski resorts affected by climate change
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2006 saw possible emissions of 28 billion tons of CO2, while CO2 possibly rose about 18 billion tons. Quote:
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Actually, since we're allowed to use whatever math we need to prove our conclusions, you should recognize the amount of human contribution wouldn't be 220Gt CO2 over 10 years. If you're only going to apply the error rate of CR to the front and back ends, why not just apply the error rate of HC to only the front and back ends? That way you can get 68.8Gt C ((7.1*8) + (2*6)), or 253Gt CO2 over 10 years. Yea, that's the ticket! Honest and impartial analysis would require an error range of statistical relevance plotted against the derived estimated averages. Honest and impartial analysis would determine the true yearly anthropogenic emissions, with a statistically relevant error range. I replicated that as closely as possible by using the numbers reported by your sources. But shit, you can't get grants by confusing people, or telling them it's statistically possible things might not be as dire as you want them to believe. You can't make definitive, absolute statements with honest and impartial analysis. Quote:
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Or, you could simply plug in whatever numbers prove your conclusion. Quote:
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Perhaps this will help you: Total money given to someone: $10 (9-11) What they did with it (ie partitioning the amount given to them): Spent it on candy: $3 (2.5-3.5) Gave it away: $5 (3-7) Lost it: $2 (1-3) Now, I'm 90% sure any of these ranges of numbers represent reality. I have less confidence in any numbers outside that range, but they are possible. So, I have 90% confidence I gave someone $9. I have 90% confidence they spent $3.50 on candy, and 90% confidence they gave $5.50 of it away. Even if I'm only 1% confident they lost some of it, given the numbers I am 90% confident of it would appear they did not lose any of it. Mathematically, statistically, logically, and intuitively all of the anthropogenic emissions have a 90% confidence level of being partitioned among non-atmospheric sinks. To make this false, you would have to argue (as you are trying to do) that atmospheric partitioning has a 100% confidence level between 3.1 and 3.5. But that's not what your source claims. |
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Re: Ski resorts affected by climate change
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Al Gore, by way of contrast, has no trouble whatsoever traipsing around the country, showing his "documentary" to whomever is willing to actually watch it, and Al Gore (credentialed scientist that he is) has no problem whatseover making all sorts of wild-eyed definitive statements. Al Gore is a huxter, shamelessly promoting his "global warming" hoax to the gullible. And many of them are fooled by him, and they end up making remarks like "You can't argue with the pictures Al Gore shows us!" 40 years of our government-run schools being dominated by Liberals and members of the Teacher's Union has taken its toll. Our children "graduate" from high school lacking the ability to do basic math, to write English correctly, to understand the difference between hard scientific data and mere theory. In short, they have ended up gullible, pliable, easily-manipulated by the likes of hucksters such as Al Gore. |
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Re: Ski resorts affected by climate change
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But one which, sadly, obviously escapes onon. He has bought the hoax being perpetrated by Al Gore The Scientist, hook, line, and sinker. Algore shows him pictures, and he gasps. |
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Re: Ski resorts affected by climate change
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But furthermore for a period of 10 years or more the probability of human emissions being less than the co2 rise falls even further. Quote:
Then we use the formula Natural contribution = co2 rise - human contribution Even if we 18 * 7.8 = 171 gTC rise in atmospheric co2 10 * 22 = 220 gTC rise in human emissions So over that 10 year period NC = 171 - 220 NC = -59 And that's using the error ranges for co2 emissions and co2 concentration that you used for a single year. This is what I mean about the uncertainty in a single year making it possible (although unlikely) that co2 rise > anthropogenic emissions, but as you take a range of more years, the uncertainty does not rise linearly with the number of extra years, and what you get is that you require higher and higher error ranges in order to make co2 concentration rise meet anthropogenic emissions. Quote:
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--------5%--------|-90%-|---------5%------- there is less than 5% chance of no < 3.1 GtC going into the atmosphere. But it's going to be much less than 5% given that you are so far from the 90% range. It will look like this: ------2.5------|A-2.5%-|----90%----|-2.5%-B|-------2.5-------- Where A and B represent the 95% confidence interval, and it can be subdivided further into 99% and beyond. zero co2 is going to fall outside of a very large confidence interval given that it is 16 times outside the 90% interval. Quote:
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Re: Ski resorts affected by climate change
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"You're arguing we can take one measurement, of a highly complex and wildly variable system, and extrapolate that over a ten year period." Quote:
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Re: Ski resorts affected by climate change
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Even if the probabilies were equally distributed across the error range (and I don't believe they would be - as if all of a sudden one value is possible and 0.1 below it is totally impossible) you used for co2 rise in 2006 they would be: 1.33-1.73 20% 1.73-2.13 20% 2.13-2.53 20% 2.53-2.93 20% 2.93-3.33 20% You used the very highest figure of 3.33 which is in the < 20%. That's what I mean by using a liberal error rate - you have taken the most extreme amount of error possible for the example. I understand you were showing it was possible for co2 rise in a certain year to be more than human co2 emissions, but it certainly isn't anyway near as probable as the co2 rise being less than the co2 emissions. As I have said before a particular year is subject to more uncertainty than a range of multiple years. So there is a small probability that cannot be written off that co2 emissions do not meet the co2 rise in a particular year. It's only when using multiple years that you reduce the uncertainty and see human co2 emissions are greater than overall co2 rise. Quote:
Gt co2 rise error range for 2006 10.4 - 26 Gt co2 emissions error range for 2006 22 - 32 You require the co2 rise to be more than 22 in order for co2 rise to be more than co2 emissions. That's just 25% of this error range you can accept (ie only 22-26 out of 10.4-26) You require the co2 emissions to be no more than 26, otherwise co2 emissions will be more than the co2 rise. That's just 40% of the error range you can accept (ie only 22-26 out of 22 - 32) Altogether you require both of these to be true. 25% x 40% = 10% But also half of those 10% of configurations will still result in co2 emissions being more than co2 rise (eg a 23gt co2 rise and 25gt co2 emissions), so in fact you can only accept 5% of possible configurations. Not to mention that this assumes an flat distribution of probability across the error ranges, when the actual case is probably a normal distribution which would lower your proportion even more. So the probability that the human emissions in 2006 were higher than the co2 rise in 2006 is more than 95% I said above that "a particular year is subject to more uncertainty than a range of multiple years. So there is a small probability that cannot be written off that co2 emissions do not meet the co2 rise in a particular year." And here you can see that this small probability less than 5% for 2006 Quote:
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But for a ten year period the error range is just 20ppm +- 2ppm, meaning the actual figure can only be as much as 10% off the estimate of 20ppm. So clearly it is better to use data with less error range no? And when using data with less possible error what emerges is that co2 emissions are clearly over the co2 rise. Quote:
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co2 rise error range: 241Gt - 272.6Gt co2 emissions for last 20 years: 485Gt (from http://cdiac.ornl.gov/ftp/ndp030/global.1751_2003.ems 2004,2005 and 2006 taken as the same as 2003) So the co2 emission estimate is 212Gt more than the upper end of the co2 rise error range. You need co2 emissions to be 44% overestimated in order to stand any chance of co2 rise being more than co2 emissions in that time period. So no I didn't have to stop at 10 years. Quote:
Look it's simple. We took measurements in 2006 with +-1ppm error, and took measurements in 1997 with +-1ppm error. So the co2 rise in 10 years is calculated as the measured level in 2006 minus the level in 1997, with the error rate being +-2ppm (the combination of both end year errors) Quote:
Global Monitoring Division http://www.cmdl.noaa.gov/projects/we...co2_mm_mlo.dat Quote:
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http://www.cmdl.noaa.gov/projects/we...co2_mm_mlo.dat Quote:
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Something might be possible, yet too improbable to entertain. Effectively a low enough probability event is treated as effectively impossible in science. Otherwise nothing could be a fact and be given in absolute and definitive statements. |
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Re: Ski resorts affected by climate change
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Two measurements are taken at exactly the same time in the same place. These two measurements are compared. As long as the measurements do not differ by more than .5ppmv they are included in the data set. Therefore, two measurements exist in the data set for one data point. It is possible these two measurements differ from each other by .5ppmv. Which measurement is the "true" measurement? They don't know, they only know the "true" measurement is somewhere within the range. It has nothing to do with probability, and everything to do with the inaccuracy of the data collection method. Quote:
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I'm done, onon. You're just repeating yourself and not providing any substantive new arguements. I've proven to you your statements are not necessarily true and that was the intent of engaging you. You can either accept the proof and add it to your knowledge of this subject, or continue dismising everything that contradicts what you want to be true. Either way it makes no difference to me. I don't debate deists and I won't debate AGW proponents. I've got nothing to gain, and nothing to lose either way. |
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Re: Ski resorts affected by climate change
Climate Change 2001: The Scientific Basis
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That just about settles this. You were only able to show co2 rise could outweigh co2 emissions in a given year by assuming anthropogenic emissions could be off by about 30%. Quote:
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1. that the max co2 rise is 3.33 for 2006 2. that the error range of 1.33-3.33 for 2006 co2 rise has equal probability distribution. Those are nice assumptions for me to use because they are the best case senario for you. If the error range is normally distributed (as I believe it is) in which case co2 rise above 3ppm in 2006 is unlikely, then the results will show the co2 rise is close to the actual average figure given of 2.33, and that makes it very difficult for co2 rise to be more than co2 emissions. Quote:
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But I did show you what happens by even assuming equal probability: 1.33-1.73 20% 1.73-2.13 20% 2.13-2.53 20% 2.53-2.93 20% 2.93-3.33 20% That represents an equal probability across the error range for co2 in 2006. Any value has as equal chance of being the actual value as any other. But ranges of course have differeing probabilities. The probability of the actual value falling above 2.93 is just 20% for example. Quote:
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1.33|-----20%-----|1.73|-----20%-----|2.13|-----20%-----|2.53|-----20%-----|2.93|-----20%-----|3.33 Ie 1.33|--------------------------------------------80%--------------------------------------|2.93|-----20%-----|3.33| Only 20% probability of the actual value being higher than 2.93 Quote:
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co2graph Notice they are perfectly happy to use the data to show long term trends. They even show the rise for the last 60 years. Yet you seem to be complaining that we shouldn't calculate the rise over the last 10... Quote:
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If you only want to use measurements on the 1st hour of the 15th day of every month then that option is available. However it won't be as accurate as taking the average measurements over each month. Quote:
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A single measurement has an error range of 379.5ppm - 380.5ppm, and assuming equal probability across this error range any one measurement could fall anywhere between with equal probability. But the average of 8760 such measurements does not have the same equally distrbuted error range between 379.5ppm - 380.5ppm. I did 1000 runs of averaging 8760 hourly measurements of random value between 379.5 and 380.5 and got these results: ![]() The lowest average I got was 379.912, the highest was 380.083 That's an error range for an average of about +-0.085. rather than an error range of +-0.5 for a single measurement. Also you can see it the probability of an average falls the further away it is from the actual value, ie a normal distribution. Quote:
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Last edited by onon; 02-03-2007 at 12:45 PM. |
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Re: Ski resorts affected by climate change
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Meantime, there is too much snow for skiing. Quote:
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United We Stand. |
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Re: Ski resorts affected by climate change
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Meanwhile, the Algore types are too busy gasping at the pictures Algore shows them in his "documentary" to bother spending any time doing actual scientific research like Dr. Shariv does. |
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