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originally posted by: pheonix358
a reply to: Greven
This is where some logical thought is needed and why this debate can rage.
Melting ice sheets do not indicate increased global temperatures. It is only caused by either an increase in local temperatures or from volcanic heat from under the ice sheet.
originally posted by: Greven
originally posted by: SonOfTheLawOfOne
As Ray already pointed out, the percentage of the carbon isotope that represents human emissions is not 40%, so a large part of the increase is from natural sources too.
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Can you prove that CO2 stayed constant at 280ppm? You can't, because the records show spikes all over the place, some as high as 600ppm, so good luck with that.
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Science is not decided by wide acceptance and consensus either. It is through experimentation and observation that leads to predictions that can be proven repeatedly. Global warming is still a theory, let's make that distinction very clear. There is no "settled science" as long as you have groups of scientists who keep opposing and presenting evidence that contradicts the claims.
Countless times, "laws" of physics and long-standing ideologies have been challenged and proven to be wrong, after being "widely accepted" or deemed true "by consensus". Everyone agreed that the Earth was flat. By your standards, it should be a FACT still. Yet, someone challenged it and it was PROVEN wrong, even though the ESTABLISHED, AGREED UPON AND CONSENSUS VIEW fought tirelessly that the proof was wrong when the evidence was staring them in the face.
I'd certainly like to know what these natural sources are. We are, indisputably, emitting more than 29 gigatonnes of CO2 into the atmosphere annually. Yet, these papers claim that only around 29 gigatonnes of CO2 can be accounted for as human-emitted, when going by isotopes - in total. These numbers just don't jive with me.
I'd sure like to see this 600ppm CO2 datapoint, or at least the paper it's in.
In this paper, I have assembled a 138 year-long record of yearly atmospheric CO2 levels, extracted from more then 180 technical papers published between 1812 and 1961. The latter year marked the end of the era of classical chemical analysis. The compilation of data was selective. Nearly all of the air sample measurements that I used were originally obtained from rural areas or the periphery of towns, under comparable conditions of a height of approx. 2 m above ground at a site distant from potential industrial or military contamination. Evaluation of the chemical methods used reveals systematically high accuracy, with a maximum 3% error reducing to 1% for the data of Henrik Lundegardh (1920 26), a pioneer of plant physiology and ecology [34, 35, 36].
Three popular techniques have evolved since 1812 for measuring the CO2 content of air (gravimetric, titrimetric, volumetric or manometric) The Pettenkofer titrimetric method – being simple, fast and well understood - was used as the optimal standard method for more than 100 years after 1857 [45, 46, 47, 48]. Different scientists calibrated their methods against each other, and by sampling gas with known CO2 content.
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I investigated short-term variations in CO2 first, stimulated by Callendar and Keeling’s assertion that the historical data are unreliable because they reflect measurements made within an unresolved diurnal or seasonal cycle.
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In his paper [38] Kreutz’s results delineate well both the seasonal cycle and weather events around the city of Giessen, and confirm strikingly the persistence of CO2 levels above 400 ppm over most of a period of 2 years.
The Mauna Loa measurements initiated by Keeling show a rise of the background since 1958 until today. In fact the CO2 concentration has been measured in the upper troposphere since the end of the 19th century by dozens of balloon flights and after the World War II by rockets. A literature research revealed [23] 63 single values since 1894–1973, from which 18 yearly averages can be calculated for heights of 1 –50 Km (stratosphere). The resulting graph is shown in figure 4. In most cases cryogen condensation had been used to separate CO2 from air using absorption in alkaline solution, by IR spectroscopy afterwards. A pronounced peak during the 30s of the 20th century is noticeable. The modern CO2 concentration is therefore not unique for thousands of years, as is stated repeatedly. This confirms the analysis by chemical methods near ground since 1812, which also show a maximum during 1930–1945 [19].
A strong variation in the atmospheric CO2 concentration since about 1800 is shown in figure 5 showing three maxima around 1825, 1857 and 1942. This is in severe contrast to the publications by the IPCC and the ice core reconstructions. The pre-Keeling C02 data show, the CO2 curve lags temperature by about 5 years. A 19th century average of 321ppm can be calculated from these data. Combining the chemical and modern measured CO2 data a 20th century average of 339 ppm can be calculated, representing an increase of about 5 % within 200 years.
Researchers submit papers for peer review. That, in and of itself, is relying on consensus of the reviewers that the paper is acceptable for a journal. Other researchers might question those results and try to falsify them, based on how the experiment is conducted. They leap at the chance to disprove something, of course - but it's still a consensus system.
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There are a great many theories in science that are widely accepted but not entirely proven. Evolution, Relativity, etc...
Did you seriously just use the naive flat earth argument to justify this? Science knew the Earth was round 200 years before Jesus was born.
originally posted by: Greven
originally posted by: pheonix358
a reply to: Greven
This is where some logical thought is needed and why this debate can rage.
Melting ice sheets do not indicate increased global temperatures. It is only caused by either an increase in local temperatures or from volcanic heat from under the ice sheet.
You're talking about one tiny place in Antarctica.
I'm talking about global glacial retreat. Look that up.
originally posted by: SonOfTheLawOfOne
As Ray already pointed out, the percentage of the carbon isotope that represents human emissions is not 40%, so a large part of the increase is from natural sources too.
Can you prove that CO2 stayed constant at 280ppm? You can't, because the records show spikes all over the place, some as high as 600ppm, so good luck with that.
originally posted by: SonOfTheLawOfOne
We are in an interglacial period, it is SUPPOSED to be warmer. When it gets warmer, ice is SUPPOSED to melt. When the ice melts, glaciers retreat.
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That does not mean that we are the cause of temperature rising, especially in light of temperature rising before CO2. So are we the cause of the temperature rising? Because CO2 rising is not what is responsible for the temperature, it is the other way around and has an enormity of support with hard data.
originally posted by: raymundoko
Actually the 97% consensus was already proven wrong.
I posted an entire writeup earlier in the thread. It wasn't scientists who came up with that consensus, it was John Cook of skeptical science. A left leaning "scientific" blog maintained by a blogger who has no education whatsoever in climate science.
The media then ran with the 97% consensus.
wattsupwiththat.com...-112263
wattsupwiththat.com...
In fact, as authors of the study point out below, the survey found that more than 90 percent of those respondents who are more engaged in research and publishing on climate science acknowledge the human contribution to warming.
wattsupwiththat.com...
originally posted by: raymundoko
Show me a study besides cooks?
a reply to: redtic
Here, we use an extensive dataset of 1,372 climate researchers and their publication and citation data to show that (i) 97–98% of the climate researchers most actively publishing in the field support the tenets of ACC outlined by the Intergovernmental Panel on Climate Change, and (ii) the relative climate expertise and scientific prominence of the researchers unconvinced of ACC are substantially below that of the convinced researchers.
In our sur- vey, the most specialized and knowledge- able respondents (with regard to climate change) are those who listed climate sci- ence as their area of expertise and who also have published more than 50% of their recent peer-reviewed papers on the subject of climate change (79 individu- als in total). Of these specialists, 96.2% (76 of 79) answered “risen” to question 1 and 97.4% (75 of 77) answered yes to ques- tion 2.
To me, one of the most fascinating aspects of climate change denial is how deniers essentially never publish in legitimate journals, but instead rely on talk shows, grossly error-laden op-eds, and hugely out-of-date claims (that were never right to start with).
originally posted by: TonyS
a reply to: Greven
Quick question. Why do you discuss this? If the global climate change crises is real, its far to late to do anything and the world is headed for an extinction or near extinction event. And probably not in our lifetime, but regardless, with China completing a new Coal fired power plant every 3 days, there's nothing that can be done to reverse the trend. Earth humanity is doomed, game, set, match.
But, if the "science" is wrong and something else is going on and earth bound humanity isn't doomed by the effects of global warming. Again, who cares, except maybe a few scientists no one will remember, who got it wrong?
So, I'm left to wonder, (and I always "follow the money"), knowing nothing can be done to fix the problem, why expend time and energy to discuss it?
originally posted by: Greven
a reply to: ElectricUniverse
Why are you using such ancient data on Total Solar Irradiance to claim things? 2009? 2005?? 2002??? Rather dated. How about seeing what it looks like a bit more recently?
originally posted by: Greven
I believe the critique is extrapolating results from a very narrow study. Consider what that paper was about:
1) Summer temperatures
2) northern Scandinavia
It seems to show that summers in northern Scandinavia are getting slightly cooler. One season of four, one area of many. Recall that, if the Gulf Stream breaks down as a result of diminished salinity of the oceans (due to freshwater influx from melting land ice, which itself would be due to increased global temperatures), Europe would suffer considerably cooler temperatures.
originally posted by: jrod
CO2 emissions are a major problem because they are the product of combustion.
Let a vital chemical in your body experienced in 40% in a very short amount of time, do you think your body would simply adapt?
This planet has vital signs. CO2 is one of many.
You asserting a claim here, that the disparity in the numbers is from natural sources. Back it up or back off of it.
Please cite the records in question, not an offhand remark by anyone.
When looking at events such as these from the deep geological past, it is vital to keep in mind that there are many uncertainties, and generally speaking, the further back we look, the more there are
Regarding " 180 YEARS OF ATMOSPHERIC CO2 GAS ANALYSIS BY CHEMICAL METHODS," see this helpful site, where you can see several writings critiquing that paper. One is scholarly, while others are perhaps less so.
Regarding "50 Years of Continuous Measurement of CO2 on Mauana Lao," Please look over this extensive critique of that work.
Dr. Happer is a physicist well-known for being a skeptic on AGW. Why should I care what you claim he says about a tiny spot of land at a particular time of day in regards to the atmospheric record? What relevance is there? There's an atmospheric phenomenon called a heat burst, which is a localized extreme temperature event, but you don't see atmospheric scientists quoting that as proof of AGW.
originally posted by: ElectricUniverse
Could you point out where I wrote that the Total Solar Irradiance graph that I gave was the most recent one?...
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So, I ask you, exactly what were you trying to imply when you seemed to have twisted my statement implying that the TSI graph I gave was the most recent one and making up your own conclusion?...
It wasn't disproven. You just need to understand what the graph shows and what has actually been happening.