Thursday, August 30, 2012

New blockbuster paper finds man-made CO2 is not the driver of global warming

An important new paper published today in Global and Planetary Change finds that changes in CO2 follow rather than lead global air surface temperature and that "CO2 released from use of fossil fuels have little influence on the observed changes in the amount of atmospheric CO2" The paper finds the "overall global temperature change sequence of events appears to be from 1) the ocean surface to 2) the land surface to 3) the lower troposphere," in other words, the opposite of claims by global warming alarmists that CO2 in the atmosphere drives land and ocean temperatures. Instead, just as in the ice cores, CO2 levels are found to be a lagging effect of ocean warming, not significantly related to man-made emissions, and not the driver of warming. Prior research has shown infrared radiation from greenhouse gases is incapable of warming the oceans, only shortwave radiation from the Sun is capable of penetrating and heating the oceans and thereby driving global surface temperatures. 

The highlights of the paper are:

► The overall global temperature change sequence of events appears to be from 1) the ocean surface to 2) the land surface to 3) the lower troposphere. 

► Changes in global atmospheric CO2 are lagging about 11–12 months behind changes in global sea surface temperature. 

► Changes in global atmospheric CO2 are lagging 9.5-10 months behind changes in global air surface temperature. 

► Changes in global atmospheric CO2 are lagging about 9 months behind changes in global lower troposphere temperature. 

► Changes in ocean temperatures appear to explain a substantial part of the observed changes in atmospheric CO2 since January 1980. 

CO2 released from use of fossil fuels have little influence on the observed changes in the amount of atmospheric CO2, and changes in atmospheric CO2 are not tracking changes in human emissions.
Figure 1: Annual temperature change of global ocean temperatures, global surface temperature and atmospheric CO2 December 1981 - December 2011. (Blue is the sea surface, red is the global surface temperature, green is CO2 level in the atmosphere). We see that the change in ocean temperatures (blue) occur systematically before changes in CO2 (green).
Update: C3 has a sharper version of the chart above

The phase relation between atmospheric carbon dioxide and global temperature
  • a Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern, N-0316 Oslo, Norway
  • b Department of Geology, University Centre in Svalbard (UNIS), P.O. Box 156, N-9171 Longyearbyen, Svalbard, Norway
  • c Telenor Norway, Finance, N-1331 Fornebu, Norway
  • d Department of Physics and Technology, University of Tromsø, N-9037 Tromsø, Norway

Abstract

Using data series on atmospheric carbon dioxide and global temperatures we investigate the phase relation (leads/lags) between these for the period January 1980 to December 2011. Ice cores show atmospheric COvariations to lag behind atmospheric temperature changes on a century to millennium scale, but modern temperature is expected to lag changes in atmospheric CO2, as the atmospheric temperature increase since about 1975 generally is assumed to be caused by the modern increase in CO2. In our analysis we use eight well-known datasets; 1) globally averaged well-mixed marine boundary layer CO2 data, 2) HadCRUT3 surface air temperature data, 3) GISS surface air temperature data, 4) NCDC surface air temperature data, 5) HadSST2 sea surface data, 6) UAH lower troposphere temperature data series, 7) CDIAC data on release of anthropogene CO2, and 8) GWP data on volcanic eruptions. Annual cycles are present in all datasets except 7) and 8), and to remove the influence of these we analyze 12-month averaged data. We find a high degree of co-variation between all data series except 7) and 8), but with changes in CO2 always lagging changes in temperature. The maximum positive correlation between CO2 and temperature is found for CO2 lagging 11–12 months in relation to global sea surface temperature, 9.5-10 months to global surface air temperature, and about 9 months to global lower troposphere temperature. The correlation between changes in ocean temperatures and atmospheric CO2 is high, but do not explain all observed changes.

Highlights

► The overall global temperature change sequence of events appears to be from 1) the ocean surface to 2) the land surface to 3) the lower troposphere. ► Changes in global atmospheric CO2 are lagging about 11–12 months behind changes in global sea surface temperature. ► Changes in global atmospheric CO2 are lagging 9.5-10 months behind changes in global air surface temperature. ► Changes in global atmospheric CO2 are lagging about 9 months behind changes in global lower troposphere temperature. ► Changes in ocean temperatures appear to explain a substantial part of the observed changes in atmospheric CO2 since January 1980. ► CO2 released from use of fossil fuels have little influence on the observed changes in the amount of atmospheric CO2, and changes in atmospheric CO2 are not tracking changes in human emissions.

46 comments:

  1. Hmmm...............methinks Discovery Channel on TV has to remove an awful lot of "documentaries" that are pushing this Carbon Lie!

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  2. Steve Mosher over at WUWT is complaining about the statement:

    “Prior research has shown infrared radiation from greenhouse gases is incapable of warming the oceans, only shortwave radiation from the Sun is capable of penetrating and heating the oceans and thereby driving global surface temperatures.”

    He says "..follow the cite and you end up with a blog post by a lawyer who has nothing of scientific interest to say about radiation physics."

    So you might want to add these links to your article.
    http://lasp.colorado.edu/sorce/images/instruments/sim/fig01.gif
    the graph is from : http://lasp.colorado.edu/home/

    And this graph of ocean penetration of various wavelengths of solar radiation:
    http://www.klimaatfraude.info/images/sverdrup.gif
    from this article: http://www.klimaatfraude.info/oceaanopwarming-of-zeespiegelstijging-door-co2-is-niet-mogelijk_193094.html

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  3. Besides the above reply, I see a few major issues with the paper's conclusions based on the cited references. The first is the use of the GISS temperature data set. It would appear that Hansen in his fervor to cool the past and warm the future has adjusted himself into a perfectly natural warming process. Maybe this paper will be what it takes to get him to change the data set to something more realistic.

    The second issue is the CO2 emissions data which are most likely just a bit above pure guesswork. The data are estimates, at best. The natural sinks and sources likely have more variability than the rate of increase in CO2 concentrations.

    I am afraid this paper is doomed mainly due to the data sets the AGW folks have used to prove their case. You just can't win.

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    1. So let me get this straight ... You're saying that the data sets that the warmists use to prove global warming are so contaminated that when they are used to show that CO2 lags the warming that dooms the analysis? So doesn't that also mean that it dooms the claims of the warmists?

      And here I thought science was supposed to be objective and about truth ... hmmmm...

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  4. A REALLY inconvenient truth ...

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  5. Of the ~97% natural origin CO2, the vast majority comes from undersea vents, by a curious path. High heat, high pressure gas is discharged into 150 atmospheres and 2C water, forming liquid CO2 almost instantly. This forms "vast pools of liquid CO2 on the ocean floor" per "Volcanic CO2" by Timothy Casey, posted at geology-1011.net. This reservoir keeps the ocean at maximum CO2 gas saturation at all times. When the ocean warms, it releases this stored gas. This warming is NOT from subduction of surface warmth, but upwelling of varialble geothermal energy. This is explained in "Earth's Missing Geothermal Flux". Carbon Climate Forcing has always been about FORCED Carbon Commodity trading....by traitors to Truth. Climatology is the credit default swap insurance for this global fraud.

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  6. We all know that the oceans can release heat to the atmosphere, (the El Nino - La Nina cycle demonstrate that) so I guess if the atmosphere can't heat the ocean, I should be able to put a beaker of water in a warm, dark cupboard and it'll eventually freeze.

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    1. Put a closed beaker of water in a warm, dark cupboard and it will equilibrate to cupboard temperature via conduction through the beaker

      Put an open beaker of water in a warm, dark cupboard and it will also equilibrate to cupboard temperature via conduction and will also evaporate.

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    2. You'll find the rate of evaporation very low compared to the rate of heat transfer, and whether the heat transfer is via radiation or conduction is less important than the fact that there is heat transfer, oh, and if the argument is that if the water is warmer than the air it's in contact with the heat transfer is going to be from the water to the air, well, heat energy is moving in both directions, so the temperature difference affects the net rate of heat transfer.

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    3. The points in relation to this post are:

      1. IR from GHGs can only penetrate water by a few microns to cause evaporative 'skin' surface cooling. This is very well known - read the paper in Nature cited at the link above
      2. Warming of the air immediately above the oceans cannot cause any significant warming of the oceans due to the immense differences in heat capacity
      3. Heat rises

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    4. Obviously the effect on the temperature of the atmosphere from a reduction in the net rate of energy flow from the oceans to the atmosphere is going to be far greater than the effect on the temperature of the oceans, that's not a point in contention.
      "heat rises" isn't evidence that net energy transfer through conduction from sea to air won't be slowed if the air is warmer.

      Wind ensures that the near surface air isn't significantly stratified in terms of temperature (reminds me of the claim that because CO2 is heavier than O2 or N2, all the CO2 is near the ground, when it's actually well mixed through the whole troposphere and stratosphere).

      Presumably you've read this "New blockbuster paper" does it even mention the effects of the El Nino - La Nina cycle on atmospheric CO2? This is a topic that has had some coverage in the peer reviewed literature:
      http://www.pmel.noaa.gov/pubs/outstand/feel1868/feel1868.shtml

      Nothing there refutes the claim that rising CO2 is a result of burning fossil fuels.

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    5. The ROOM that the beaker was in will be above freezing therefore the beaker that is sitting in it will not freeze.

      The ocean waters is continually getting influx of energy from the sun thus the flow continues into the atmosphere unabated thus it is not possible for it to freeze over.

      Evaporation is slower than IR because one move at the speed of light and the other does not.

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    6. Andrew W: There is very little reduction in energy flow from the oceans to atmosphere due to a warming of the atmosphere. The atmosphere cannot heat the oceans due to the immense differences in heat capacity, and the other reasons linked in the post above.

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    7. Andrew,

      "Nothing there refutes the claim that rising CO2 is a result of burning fossil fuels."

      You can't even verify that the alledged BACKGROUND CO2 level measured at the official stations is a meaningful metric the way they are selected and normalized!!! For instance, at Mona Loa they can throw out 2/3 of the data for a month because it exceeds their standards in some way. We do NOT have a believeable metric to compare things to. The paleo record is probably a better record than our high tech measurements.

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  7. First Vostock

    Then Australian Antarctic Division's work at:

    http://www.antarctica.gov.au/__data/assets/pdf_file/0004/90805/2012-CP-Pedro-CO2-lag.pdf

    Now this.

    The alarmists are increasingly being shown to be "All tip and no iceberg".

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  8. http://tallbloke.wordpress.com/2012/09/01/earths-energy-balance-some-observations-in-the-light-of-new-evidence/

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  9. Okay, so can we petition the Australian Government to get rid of the Carbon Tax then???

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  10. I wish the conclusions of this paper were correct, but unfortunately they are not.

    This paper makes a fundamental mathematical error, and hence the conclusions are not supported by the method used (and indeed easily shown to be incorrect). No correllation, no matter how strong, with the annual increase in atmospheric CO2 can explain the linear component of the long term rising trend in CO2. This is because the linear component of the long term trend corresponds to the mean value of the annual increase. The correllation is mathematically independent of the mean value (if you look at the mathematical formula for a correlation, wherever the observations appear in the equation they have their mean value subtracted). Thus the correlation explains the variability of the annual increase around its mean value, but not the mean value itself and it is the mean value that is responsible for the long term trend. This is a mistake that has been made before, and I expect it will be made again, but it is a shame for all concerned that this one has slipped through peer review.

    The effect of sea surface temperatures on the annual increase in CO2 is well known, and has been for 30+ years (Bacastow 1976) and is described in the IPCC reports. The analysis of this in the paper is essentially correct, but entirely uncontraversial. The suggestion however that anthropogenic emissions has little effect on atmospheric CO2 is howerver incorrect (as multiple lines of evidence suggets) and the conclusion relflects the authors error in not considering the effect of anthrpogenic emissions on the mean value of the annual increase, which is not measured by te correlation coefficient, and is what actually causes the long term trend.

    A full explanation requires equations and diagrams, which I can’t include here, but you can find a full explanation here:

    http://www.skepticalscience.com/salby_correlation_conundrum.html

    and a regression based example here

    http://www.skepticalscience.com/roys_risky_regression.html

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    Replies
    1. Skeptical science has no credibility!
      http://www.populartechnology.net/2012/03/truth-about-skeptical-science.html

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    2. I agree, I have posted there several times only to have my inconvenient posts erased.

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    3. The above comments of Dikran Marsupial are refuted in several comments (esp.by Bart) on this post at WUWT:

      starting approximately here:

      http://wattsupwiththat.com/2012/08/30/important-paper-strongly-suggests-man-made-co2-is-not-the-driver-of-global-warming/#comment-1069960

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    4. Well, I didn't find Bart's reasoning very persuasive.
      An analogy to his argument would be; If a lake with a narrow outflow had a given average height for many decades, and an engineering project were constructed that diverted additional water flow into the lake, and when this happened the lake level rose, that is not evidence that the additional inflow caused the rise in lake level - Even if no other changes had been detected that could explain the rise in the lake level.

      All sounds like rationalizing to justify a political or ideological agenda.

      If a city has a major particulate air pollution problem, and as the problem grows so does the incidence of respiratory illness amongst the inhabitants, that's no evidence that the two are linked, even if there are high levels of particulates in the respiratory systems of those suffering most from the illness.

      If germs are seen at the sight of an inflammation, and the same germ is seen in multiple cases of similar inflammations,that's not evidence that the two are related.

      After all, Germ Theory is only a theory.

      Given the atmospheric CO2 correlation with El Nino, and the peer reviewed papers offering explanations, I struggle to see merit in this offering from Humlum et al.

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  11. Anything Al Gore was so involved in, I just had to be a little bit suspicious of...

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  12. I will not agree or disagree until I check with my congressman/woman

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  13. use google translate:

    http://www.forskning.no/artikler/2012/april/319336

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  14. some particularly interesting comments on this paper/post at WUWT:

    http://wattsupwiththat.com/2012/08/30/important-paper-strongly-suggests-man-made-co2-is-not-the-driver-of-global-warming/#comment-1068338

    http://wattsupwiththat.com/2012/08/30/important-paper-strongly-suggests-man-made-co2-is-not-the-driver-of-global-warming/#comment-1070572

    http://wattsupwiththat.com/2012/08/30/important-paper-strongly-suggests-man-made-co2-is-not-the-driver-of-global-warming/#comment-1069819

    http://wattsupwiththat.com/2012/08/30/important-paper-strongly-suggests-man-made-co2-is-not-the-driver-of-global-warming/#comment-1068310

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  15. interesting article and arguements. One forgets the article, to follow the arguements. But are we flat-earthers. All the ocean gets sunlight all the time, and does the local star extinguish at night, or does the earth revolve as a ball, around a local gravity pit. There are innumerable valuatiions that are asscribed to the the earth, and this article did do some justice, by adding more to the equation. Yes he did use bad datasets, but those are the datasets that are being argued as so bad for mankind. That our uneducated forefathers could not add up two plus two. But they created the educational system that told us how to add the numbers, and slapped our hands with ruler until we got it right.
    Now they are acknowledging that volcanoes and other influences are part of the problem, they just have to enumerate them. But we are still stuck with the same datasets, and the same dataset master who corrupted the first dataset, and that we have to trust them to look out for mankind. Why?

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  16. From the NIPCC Report:

    http://www.nipccreport.org/articles/2012/sep/5sep2012a4.html

    "In an effort to determine the likelihood of this concern, Knorr constructed a new-and-improved history of AF values stretching all the way back to 1850 by utilizing data on CO2 emissions arising from fossil-fuel use, cement production and changes in land use, as well as atmospheric CO2 concentrations measured at Mauna Loa and the South Pole, plus those derived from Law Dome and Siple ice-core data, together with their associated uncertainties. Based upon that reconstruction, the UK researcher reports that "despite the predictions of coupled climate-carbon cycle models, no trend in the airborne fraction can be found [italics added]." Or as he writes in the concluding section of his study, "the hypothesis of a recent or secular trend in the AF cannot be supported on the basis of the available data and its accuracy," which indicates that not only has the global ocean been increasing its uptake rate of anthropogenic carbon in such a way as to successfully "keep up" with the rate at which the air's CO2 content has risen in response to historical anthropogenic carbon inputs - as has concurrently been demonstrated by Khatiwala et al. (2009) - so also have Earth's terrestrial ecosystems been "keeping up" in this regard."

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    1. From the link above:"Noting that about 40% of the yearly amount of CO2 that is released to the air by human activities has historically remained in the atmosphere - a quantity that has come to be known as the airborne fraction of anthropogenic CO2 (AF) - Knorr (2009) states that several studies have recently highlighted the possibility that the world's oceans and terrestrial ecosystems may be gradually losing their ability to sequester such a large proportion of humanity's CO2 emissions, citing the work of Le Quere et al. (2007), Schuster and Watson (2007) and Canadell et al. (2007). And the author states that if this possibility actually materializes, "in a way predicted by models, this could add another 500 ppm of CO2 to the atmosphere by 2100," which would greatly exacerbate the so-called "climate crisis" envisioned by Al Gore and the Intergovernmental Panel on Climate Change."

      If anything the implication is that anthropogenic CO2 is recognized as contributing to the observed increase in atmospheric CO2. The paper is simply arguing that the present sinks are likely to continue taking CO2 out of the atmosphere at their present rate because they're not demonstrating CO2 saturation. Which is something I think is likely.

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  17. http://tallbloke.wordpress.com/2012/09/08/is-the-airborne-co2-fraction-temperature-dependent/

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  18. http://radioviceonline.com/wp-content/uploads/2009/11/knorr2009_co2_sequestration.pdf

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  19. http://pielkeclimatesci.wordpress.com/2012/09/20/review-of-humlum-et-al-2012-the-phase-relation-between-atmospheric-carbon-dioxide-and-global-temperature-by-donald-rapp/

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  20. http://www.sciencedirect.com/science/article/pii/S0921818112001658

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  21. If there is so much wrong with this paper how did it get past peer review - or does that not signify anything these days?

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    1. You mean like Mann et al '99, published in Nature?

      What specifically do you claim is wrong with this paper?

      Vague comments with no scientific backup are not helpful.

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    2. Dear MS,

      The flaws with this paper are summarised in two comments.

      http://www.sciencedirect.com/science/article/pii/S0921818113000908
      http://www.sciencedirect.com/science/article/pii/S0921818113000891

      Masters & Benestad show that Humlum's approach misdiagnoses causes.

      Richardson shows that the conclusion violates conservation of mass, and that if you follow the maths and run the numbers so that the approach is consistent with maths, then you can calculate the natural contribution and the human contribution to rising atmospheric CO2.

      Nature: indistinguishable from zero
      Human: indistinguishable from 100%

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    3. The links aren't operational and produce a "Request entity is too large" error. Do you have links to the full comments?

      Humlum should be given the opportunity to reply. I will email him for a reply.

      In the meantime, this graph clearly demonstrates temperature drives CO2:

      http://hockeyschtick.blogspot.com/2013/01/single-graph-demonstrates-man-made-co2.html

      And his conclusions are supported by the works of Salby and Frölicher et al and inadvertently by Francey et al

      http://hockeyschtick.blogspot.com/2013/04/new-paper-demonstrates-temperature.html

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    4. Email reply received from Dr. Humlum regarding my question "Were you allowed to publish a reply to these comments?":

      Email from Dr. Humlum:

      No, we were not informed by the journal that any of these papers were coming, and did therefore not have the opportunity of writing a reply, as would usually be the case.

      I have not yet had an opportunity to study them in any detail, but from a quick glance it appears to me that they both agree that our analysis is correct (changes of CO2 follows after changes in temperature, just
      like what is seen on longer time scales in ice cores), but that this does not exclude that there might be an intermediate time interval where the opposite may be true (temperature follows CO2).

      Theoretically speaking this is of course true, although it does not sound very likely to me. I would therefore have been much more impressed, had the two comments instead demonstrated that there is such an intermediate time interval where changes of temperature follow
      changes of CO2 (quite essential for the CO2 hypothesis). But this is obviously not the case.

      All the best,
      Ole

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    5. MS, Humlum was emailed an early draft of the Richardson (2013) comment on September 15th, 2012.

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  22. MS, I'd also add that the Richardson reply shows that rises in CO2 correlate at a time lag of zero (or +1 month, +2 months, whatever) with man-made CO2 emissions. Which is what you'd expect if man-made CO2 was going into the atmosphere and not magically turning into pixie dust or being teleported into space.

    The reason that Humlum et al reached the opposite conclusion, was that they compared the change in atmospheric emissions with the change in the change of human contribution.

    Analogy: Richardson compares distance travelled with speed, whereas Humlum compares distance travelled with acceleration.

    This seems a bizarre choice as there is no obvious physical reason why these should be well correlated, and Humlum et al don't provide a reason in their paper.

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    1. Well, if that's what Richardson et al says, it is contradicted by the findings of Francey et al [linked above] and by the graph of CO2 & temperature over time.

      http://www.woodfortrees.org/plot/esrl-co2/isolate:60/mean:12/scale:0.25/plot/hadcrut3vgl/isolate:60/mean:12/from:1958

      I have emailed Dr. Humlum for a reply.

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    2. Email received from Dr. Humlum:

      Thank you very much for your mail.

      I believe that we just have to accept and respect that people may disagree on the interpretation of certain data sets.

      I note that our way of interpreting temperature and CO2 data apparently is supported by a new textbook:
      Physics of the Atmosphere and Climate (2012). Take a look on pages 66-68 and 252-254. Unfortunately we did not know about this book when we submitted our paper last year, as it was published almost at the same
      time.

      However, I must disagree that we are comparing ‘distance travelled’ with ‘acceleration’. This is not a fair representation of our work. We are comparing change rates with change rates, and based on this,
      proposing interpretations.

      If I should attempt an analogy, we are investigating which muscle groups are active when climbing each step on a long staircase, concluding that it looks as if one special group is relatively important (but not the full story). Based on this we suggest that for climbing the
      entire staircase this group of muscles presumably is important as well.

      But we do not prove it, I agree. But then, it is virtually important to prove anything in science, only to make different interpretations look more or less likely.

      All the best,
      Ole

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  23. I find Ole's interpretation unbelievable, I don't think he's had time to properly read the Richardson comment.

    Humlum et al differentiate the human emissions rate. The human emission data data he takes are in Gt per year, and he differentiates them into Gt per year-squared.

    i.e. quantity per time-squared, which is an acceleration.

    They then take the atmospheric quantity of CO2 in ppm, and differentiate that to get a value in ppm per year.

    i.e. quantity per time, which is a velocity.

    They then correlate those two, but do not explain why they correlate a velocity with an acceleration. If you are consistent and correlation human emissions in ppm per year with the atmospheric change in ppm per year, then you find there is a correlation.

    The Richardson approach is based on starting with conservation of mass and then following the equations to ensure physical and mathematical consistency. Humlum has not demonstrated the physical and mathematical consistency of his approach yet.

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  24. land temps follow ocean temps/ENSO

    http://www.tims.ntu.edu.tw/download/talk/20120920_2300.pdf

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  25. I find error in the multiple comments stating that the atmosphere cannot warm the ocean because LWIR can only penetrate a few millimetres or because heat cannot transfer in due to the sea-surface microlayer effect. In short, both arguments essentially state that heating the surface causes increased evaporation that then leads to an energy release that causes the surface temperature to cool or remain stable. Greenhouse gases have played a role in the Earth's temperature and always will. They do so by trapping longwave radiation and warming. The net increase in heat content in the atmosphere is then transferred via radiative or physical means warming the systems both above and below. The system isn't stable, there is mixing going on, and so the net heat doesn't stay at the microlayer on the ocean surface, it mixes, being transferred deeper into the ocean in many locations including where water masses downwell. This transfer takes time. The net ocean temperature is slow to change but it does change. This lag in temperature change causes several other feedback's including out-gassing of CO2 that may lag behind the shift in temperature. Yes, it's possible to have anthropogenic forcing disturb the equilibrium, heat the atmosphere which then warms the ocean causing a lagged release of more CO2. That's caused positive feedback. Anthropogenic forcing, be it from changes in ecosystems, greenhouse gas emissions, or other means, is part of the net heat balance on the Earth. I'm not saying we should run for the hills because we are destroying the planet, but let's not fool ourselves by letting a poor understanding of basic physics lead us into thinking that we humans don't have an influence on our planet.

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    1. No, LWIR cannot significantly warm the oceans for the reasons given, including empirical measurements here:

      http://hockeyschtick.blogspot.com/2012/09/realclimate-admits-doubling-co2-could.html

      and the theoretical reasons here

      http://hockeyschtick.blogspot.com/2010/08/why-greenhouse-gases-wont-heat-oceans.html

      and because of convection [heat rises]. The ocean has 1000X higher heat capacity than the atmosphere, therefore the oceans wag the tail, the atmosphere, NOT the other way around.

      http://tropical.atmos.colostate.edu/Includes/Documents/Publications/gray2012.pdf

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