To: Jacob Snyder who wrote (156455 ) 9/4/2011 5:47:30 PM From: Salt'n'Peppa 25 Recommendations Read Replies (6) | Respond to of 206085 Mmmm, an entire carton filled with cans of worms! The skeptic (or is it cynic?) in me sees scary graphs and cherry picked data. Let's look at these one by one. This graph is compiled from data at a Hawaiian observatory. Incidentally, anyone know just how much CO2 is put out by volcanoes???! I realize Mauna Loa is quite lofty, but they could have picked a better geographic location, say in Siberia, or the Arabian desert, the middle of the Pacific or central Africa, well away from any volcanoes (massive CO2 sources by the way). The graph looks nice and dramatic, with that big slope and all. It suggests that atmospheric CO2 has increased by roughly 75 ppm over the last 50 years. Did you read the data disclaimer on the website? Instead of using the end points of this miniscule 50 year dataset, try plotting a graph of 0-1,000 ppm. That is 0-0.1% in real terms. I'd like to know exactly what instruments have been doing the measuring. Were they the exact same sensors for all of those 55 years? If not, then error is introduced to the dataset right from the get-go. I understand the concept of CO2 as a "greenhouse gas" and its energy (heat?) trapping qualities. I also understand the relevance of ppm level increases having a real effect. it is the actual data collection and manipulation that I have a problem with. Here's a quote from a UCSD website on the subject: earthguide.ucsd.edu "long-term reconstructions of atmospheric CO2 levels going back in time show that 500 million years ago atmospheric CO2 was some 20 times higher than present values. It dropped, then rose again some 200 million years ago to 4-5 times present levels--a period that saw the rise of giant fern forests--and then continued a slow decline until recent pre-industrial time." There is a lot of good information on this UCSD website. No climate scientist scare-mongering for funding. Just balanced discussion. Well worth a browse through. ------------------------------------------------------ What a wierd and pointless graph. It is showing a -0.4C to +0.4C temperature departure from an arbitrary zero line, over just 130 years. Why start the graph at 1880? We know that we had a warm period in the Middle Ages and a cold period in the early 1800's. This graph would be a lot more meaningful if shown over 1000 years or more. ------------------------------------------------------------------------ We are talking an alleged 20cm increase over 120 years. Hardly the AlGore 20 feet in 20 years garbage, is it. Why not include the disclaimer that appears right below this graph in the link you provided? "Because of the limited geographic coverage of these records, it is not obvious whether the apparent decadal fluctuations represent true variations in global sea level or merely variations across regions that are not resolved. A recent paper suggests that many of the tide gauges used by Douglas show no rise in sea level when the data is updated to include data to 2010." ------------------------------------------------------------------------- More "fun with graphs". I notice that little +/- 2SD error shading on the upper curve. Place the same error shading on the lower curves and it is totally statistically sound to say that the curves do actually overlay one another in near-perfect correlation. The person making this graph uses his/her own statistical licence to place the various curves as far apart as possible, for dramatic (I mean more funding) effect. Regardless, once again the graph shows just 30 years of data. I want to see a graph over 1000 years to give the subject any real value. -------------------------------------------------------------------------------- LOL. I don't even know what to say about this one. The graph is showing just 8 years of data. EIGHT YEARS!!! Seriously?! Going to the source of this data, NASA's GRACE project, I found the following graphs which use the exact same data. Look at the top one, which graphs the same data as the above graph from the original post, but includes data from 1992-2003. The 2003-2010 period goes from approx -150 Gt/yr to -450 Gt/yr, or net -300 Gt/yr. The above graph goes from +800 Gt/yr to -800 Gt/yr, or net -1,600 Gt/yr It is an order of magnitude smaller using the same data!!!!!!!!! jpl.nasa.gov Call me crazy but I just cannot believe all this bunk. It is just fun with numbers and fun with statistics. Hype and hysteria, study and fund, fund and study. Amazing how much time one can spend on useless interweb "fact"finding while riding out a storm. LOL S&P