
Reposted from Jennifer Marohasy
The Available Evidence Does Not Support Fossil Fuels as the Source of Increasing Concentrations of Atmospheric Carbon Dioxide (Part 1)
Because the increase in the concentration of atmospheric carbon dioxide has correlated with an increase in the use of fossil fuels, causation has been assumed.
Tom Quirk has tested this assumption including through an analysis of the time delay between northern and southern hemisphere variations in carbon dioxide. In a new paper in the journal Energy and Environment he writes:
“Over the last 20 years substantial amounts of CO2 derived from fossil fuel have been released into the atmosphere. This has moved from 5.0 gigatonnes of carbon in 1980 to 6.2 gigatonnes in 1990 to 7.0 gigatonnes in 2000… Over 95% of this CO2 has been released in the Northern Hemisphere…
“A tracer for CO2 transport from the Northern Hemisphere to the Southern Hemisphere was provided by 14C created by nuclear weapons testing in the 1950’s and 1960’s.The analysis of 14C in atmospheric CO2 showed that it took some years for exchanges of CO2 between the hemispheres before the 14C was uniformly distributed…
“If 75% of CO2 from fossil fuel is emitted north of latitude 30 then some time lag might be expected due to the sharp year-to-year variations in the estimated amounts left in the atmosphere. A simple model, following the example of the 14Cdata with a one year mixing time, would suggest a delay of 6 months for CO2 changes in concentration in the Northern Hemisphere to appear in the Southern Hemisphere.
“A correlation plot of …year on year differences of monthly measurements at Mauna Loa against those at the South Pole [shows]… the time difference is positive when the South Pole data leads the Mauna Loa data. Any negative bias (asymmetry in the plot) would indicate a delayed arrival of CO2 in the Southern Hemisphere.
“There does not appear to be any time difference between the hemispheres. This suggests that the annual increases [in atmospheric carbon dioxide] may be coming from a global or equatorial source.”
********************
Notes
‘Sources and Sinks of Carbon Dioxide’, by Tom Quirk, Energy and Environment, Volume 20, pages 103-119. http://www.multi-science.co.uk/ee.htm
The abstract reads:
THE conventional representation of the impact on the atmosphere of the use of fossil fuels is to state that the annual increases in concentration of CO2 come from fossil fuels and the balance of some 50% of fossil fuel CO2 is absorbed in the oceans or on land by physical and chemical processes. An examination of the data from: i) measurements of the fractionation of CO2 by way of Carbon-12 and Carbon-13 isotopes; ii) the seasonal variations of the concentration of CO2 in the Northern Hemisphere; and iii) the time delay between Northern and Southern Hemisphere variations in CO2, raises questions about the conventional explanation of the source of increased atmospheric CO2. The results suggest that El Nino and the Southern Oscillation events produce major changes in the carbon isotope ratio in the atmosphere. This does not favour the continuous increase of CO2 from the use of fossil fuels as the source of isotope ratio changes. The constancy of seasonal variations in CO2 and the lack of time delays between the hemispheres suggest that fossil fuel derived CO2 is almost totally absorbed locally in the year it is emitted. This implies that natural variability of the climate is the prime cause of increasing CO2, not the emissions of CO2 from the use of fossil fuels.
Data drawn from the website http://cdiac.ornl.gov/trends/co2/contents.htm .
Tom Quirk has a Master of Science from the University of Melbourne and Master of Arts and Doctor of Philosophy from the University of Oxford. His early career was spent in the UK and USA as an experimental research physicist, a University Lecturer and Fellow of three Oxford Colleges.
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@ur momisugly Smokey
Can anybody justify the IPCC using ice core data to estimate CO2 levels during the 19th and early 20th centuries, when many direct measurements were recorded? Any justification other than that was the only way to get data to support the predetermined conclusions?
A related question: Has anybody ever studied whether Vostok is a location that is representative of global CO2 levels? How can it be claimed that ice core samples from one location accurately represent global CO2 levels?
Pamela Gray (07:06:40) :
Long-term dynamics of chlorophyll concentration in the ocean surface layer (by space data)
A. Shevyrnogova, and G. Vysotskayaa, Institute of Biophysics of SB RAS, Krasnoyarsk
The information about atmospheric warming imparts particular significance to the task of determining the real-life dynamics of the biosphere. The actual contributions of the land and ocean biotas have not been accurately determined, although there is a great body of literature on the subject.
The extensive scientific discussion of global warming causes a natural wish to relate this process to possible changes in the amount and dynamics of terrestrial and oceanic vegetation. Does this process influence variations in the amount and diversity of plants? Does it influence the pattern of their seasonal and long-term variations? It would seem that continuous elevation of CO2 and increase in the mean global temperature must cause permanent long-term changes in the amounts of phytopigments in the biosphere. But is this really so? What should be the direction of these changes?
Thus, the initial task was to reveal long-term trends of phytopigment concentrations in the ocean. This task could be fulfilled based on daily satellite measurements conducted for many years.
However, analysis of variations in phytopigment concentrations under different biogeographic conditions showed that the initial statement of the problem of studying linear or nonlinear trends was not quite correct. It has been found that on a global scale, the variations are oscillatory and the trends revealed for separate time periods must be just parts of a long-period oscillatory process. Moreover, these oscillations at different latitudes and in different times (e.g. in the time of CZCS and SeaWiFS functioning, in different seasons, etc.) are often in antiphase.
Fig. 1 shows variations in the average chlorophyll concentration in the Global Ocean from 1998 to 2003. The latitude dependence of the obtained measurement data has been taken into account: the origin of this dependence is different area of pixels at different latitudes. The graph indicates that in the time period between 1998 and 2003 the average chlorophyll concentration in the Global Ocean reached its minimum in 1998. The maximum chlorophyll concentration was registered in 1999, subsequently stabilizing at 0.227–0.23 mg/m3. The variation of chlorophyll concentration from 0.231 to 0.228 mg/m3 between 1999 and 2000 is statistically significant, because it resulted from the calculation of a large body of pixel-to-pixel satellite data.
An increase in chlorophyll concentration from 0.223 to 0.231 mg/m3 between 1998 and 1999 was 1.3%, which is a very large value for the area of the whole Global Ocean and thus cannot be accidental.
Pamela Gray (10:22:12) :
What if the CO2 we now have in the atmosphere is another necessary ingredient for the oscillating plankton bloom that produces the oscillating fish population boom? Were we to somehow (not likely but I am just musing here) reduce this CO2 and then the plankton bloom were to happen, it would be short lived due to insufficient CO2.
Pamela, the ocean waters are extremely CO2 rich, compared to the atmosphere. CO2 is not the limiting factor there, even if it is largely bound CO2 (as -bi-carbonates). Iron and other nutritients in general are the limiting factors…
Any idea how much algal blooms add to the ocean sink of CO2? The bloom itself does reduce (temporarely) the partial pressure of CO2 in the upper ocean waters, but indeed that ends mostly up in the food chain. Only what drops out towards deeper oceans is what makes the ultimate difference.
For the North Atlantic, the “net community production” (as CO2 uptake) was measured over a longer period (18 years), thus including algal growth effects on CO2 uptake. See:
http://www.sciencemag.org/cgi/content/abstract/298/5602/2374
Fig. 4 in the full article shows the relationship with climatological circumstances, where a negative NAO gives more mixing with deeper layers (more nutritients) and higher productivity, thus a higher sink.
This results in a variability of about +/- 50% around the average sink capacity of the North Atlantic.
“It is absurd to claim that it shows that human activity is not responsible for the observed increase of CO2 in the atmosphere ”
It is equally absurd to claim that increased CO2 is having any significant impact on climate. So far we have no such evidence. None of the impacts that “the models” predict have come to pass in actual observation.
If it isn’t having any detrimental impact, what is the point in pouring millions of dollars into all this study and arguing so much over the cause of it? What evidence there is suggests that atmospheric CO2 is more of a response to temperature change than a cause of it. There is also no indication that life on this planet was in any difficulty when CO2 levels were twice today’s levels or even time times today’s levels as they have been in the geological past.
And we should be more worried about sea level drop from cooling than sea level rise from warming. Not a single coral reef on this planet can survive above sea level.
http://www.whitehouse.gov/
The White House is inviting you to post your questions on the economy and vote on submissions from others. The President will answer some of the most popular in an online town hall on Thursday.
Note to US people: Not much time left to send in questions
Re: John A (03:20:04) :
‘Can someone explain why the countries of Northern Africa have a persistently higher CO2 concentration that the heavily industrialized nations of Northern Europe?
Anyone?’
..Possibly the drier atmosphere and lesser vegetation across North Africa absorbs less CO2? LK
Re: Chris Knight (04:00:42) :
“The huge surface area into which CO2 is absorbed is condensed water –
clouds, fog and mist, dew, humid tropical atmospheres, cold surfaces, melting ice etc.,
(and surface vegetation)
– and not directly on land or ocean surfaces, which do not possess sufficient surface area in contact with free atmosphere to account for diurnal or seasonal CO2 concentration changes.”
..Chris, I take your point. It is a very good one. Regards, LK
Re deforestation:
Actually I am an evil mining geologist, who has long been defending himself by pointing out that you can barely see the vast Mt Newman iron ore mine on a Landsat image, whilst the rather trendy-lefty Western Suburbs of our local metropolis show up as a vast scar, and the inland agricultural devastation that feeds and funds them goes on almost forever.
In 1986 I drove inland eastwards from Pontianak into western Kalimantan (Borneo), as far as Sanggau on the Kapuas river, and then spent a rather amazing two months just north of there mapping and sampling alluvial gold deposits in a virgin jungle of monstrous trees, teeming wildlife and scattered tiny Dayak settlements. The only thing that broke the spell though, was the constant scream of Stilhl chainsaws, and the sight of endless rafts of logs being poled and tugged, Candian-style, down the huge equatorial rivers.
Ten years later, in 1996, I went back to look at another gold prospect, further inland, at a place called Nangapinoh. The frontier town of Sanngau was now a forgotten backwater, and it was a further two and a half hours drive inland from there before we reached the retreating jungle front. All that remained of the intervening magic wilderness that I had seen ten years before was a sea of brown mud, dotted with the shanty settlements of miserable ‘transmigrated’ Javanese, and very sparsely planted with oil palms. The only wildlife that I saw this time was from my shabby hotel window in Nangapinoh: a rather sad, old, balding orang utan, tethered by a chain around its neck to the steel verandah post of the next door balcony.
Deforestaton was real. And such a great pity, that I couldn’t help concluding that, failing education and contraception, a severe cullling of our species might be the only effective environmental policy.
But I don’t believe in anthropogenic global warming! It’s doesn’t seem to be very good science.
@ur momisuglylaurence scaduto Kirk (23:12:15) :
I have worked extensively in the field in sub-tropical Brazil, the mouth of the Amazon near Belem, also Indonesia, and for many years in the hot southern U.S. states. The concept of cutting tropical forests down and having them “replaced with mud and the occasional oil palm” is a bunch of bull-****. It is dang near impossible to keep a bare patch of ground bare wherever there is warmth, sun, and rain. Ask any farmer. Some of the plant growth and re-growth is very fast. Kudzu plants in the southern U.S. grow at roughly one foot per DAY.
One Brazilian company, a former client, harvests and plants a special Eucalyptus tree that grows one foot per month, twelve feet per year. (see http://www.Aracruz.com) When I was there in the early 1980’s they harvested 10,000 acres each year and replanted seedlings immediately. There was substantial unwanted growth of foreign plants that required removal, what we refer to as weeds.
@ur momisuglynvw (06:46:01) :
See above. Regrowth rates are very high.
Even in drought-stricken Southern California, where I live and work, burned areas from the frequent wildfires are green and growing within a year. I see this all the time, every year. This regrowth occurs with no assistance from humans, just natural processes of seeds blown by wind or carried by animals. This occurs even on very poor soils, such as steep hillsides with rock outcroppings.
The existence proofs of short-lived bare dirt areas from deforestation or clear-cutting are yet another reason I find so many of the AGW positions are not credible. Who am I supposed to believe, the AGW scientists, or my lying eyes?
Please, somebody tell me again that when the Amazon forests are cut down, that CO2 in the atmosphere goes up.
City-boys, these AGW scientists. Somebody ought to take them on a field trip to a farm. Ask them to find and photograph the bare dirt areas.
@ur momisugly Pamela Gray,
Pamela, I enjoy your comments immensely. However, I have a question regarding the trade winds blowing the hot surface ocean water away, then allowing cold underlaying water to rise. This seems rather implausible to me, as the warm surface water extends many feet deep, actually hundreds of feet from the temperature-depth maps I have seen. Is this truly the mechanism, and could you explain that more fully?
“It has been found that on a global scale, the variations are oscillatory and the trends revealed for separate time periods must be just parts of a long-period oscillatory process.”
Part of a larger, chaotic process?
Oliver Ramsay (08:14:54) :
Oliver! Where do I sign up for a regular check from Exxon, so I can have a reason to be a denier? Well, other than the fact that I don’t suffer from projection bias, and the fact that I can look at evidence with a halfway open mind and say: Hey, I don’t know for sure about AGW, and based on the evidence, neither do the alarmists.
So to all alarmists out there:
Until you have given all of your money to support AGW research and mitigation, and have given up all of your freedoms to live a carbon free lifestyle, git yer hand outta my pocket, and quit telling me how to live.
Could it be true that the largest body of CO2 eating vegetation is the ocean? And that oceanic plant growth is tied to large oscillating swings mediated by trade winds? Given the land based vegetation compared to an active global plankton bloom added to the already rich plant life in the oceans, I am beginning to think that forests and crops don’t hold a candle to the oceans. Were you to compare them right now, one would be thinking it is about even (it still probably favors the ocean plant life), but with cold water mixing, and the nutrients that event brings to surface dwelling oceanic plant life along with the dust that fertilizes the whole mariachi, I think the balance swings way wide to the side of the ocean. Maybe that red tide ain’t so toxic after all. Just don’t eat the shellfish.
JeffK (08:18:04) :
“…..The *whole* mass of the plant needs to be accounted for (root, stalk, leaves, etc.) & not just the fruit which is harvested (wheat & corn kernals, etc.). This is especially true for corn. The weight & mass of the whole plant is much larger than what is harvested off of the cob.”
I remember seeing a display at the University of Illinois when I was a kid where some incredibly patient person had painstakingly excavated and cleaned off the entire root system of a cornstalk. It was old style, non-hybrid corn which used to grow 10-12 feet high. The root system extended down about 15 feet below ground. Indeed, more of the plant mass was below than above ground.
Tim
CO2 from wherever doesn’t “end up” in the atmosphere. Or anywhere else. It enters a huge, complex and poorly understood cycle over a period of (depending on whom you believe) up to about 10 years or more than a 1000.
CO2 goes up, releases its heat and comes down back. It would be interesting to see how this graph changes with time at different altitudes. (Provided it is not “classified”)
@Eric
The bottom line answer for AGW seems to be ‘carbon dioxide is a greenhouse gas therefore it must be causing global warming’. The corollary to this is ‘man is burning fossil fuels and therefore all increases in atmospheric CO2 are human.’
The climate is just not that simple. It’s not just wrong, it’s plain ignorant for anybody to assume the world is in a natural steady state. ‘Climate change’ is a meaningless phrase and ‘stopping climate change’ is absurd. Climate change is natural. It’s ongoing. The climate is supposed to change, it’s always changed and it always will change.
I recall a Persian emperor who sent soldiers to the sea to whip the waves to stop the tide from rolling in. Fighting climate change is just as absurd and will have the same results.
Andrew (10:36:17) :
“Simple arithmetic definitively shows human activity is responsible for the increase in CO2 since the industrial age.”
This is an assertion about simple arithmetic, yet the simple arithmetic suggested is not actually included in the post.
In the interest of Science, please show us what simple arithmetic you are talking about. Should be easily postable by you, since it’s so simple.
Andrew
Andrew, the simple arithmetic is as follows:
natural carbon sources + emissions = natural carbon sinks + increase in the air.
Of this equation, only the emissions are known with reasonable accuracy and the increase in the atmosphere is known with good accuracy. Thus in average per year:
natural carbon sources + 8 GtC = natural carbon sinks + 4 GtC
or:
natural carbon sources – natural carbon sinks = -4 GtC
Or in other words, nature is a net sink for carbon and didn’t add one gram in total mass to the increase of carbon in the atmosphere over the past 50 years. But nature did exchange a lot of individual molecules between the oceans/biosphere and the atmosphere…
There are numerous independent threads which prove that the increase is a direct result of human emissions. This thread simply shows that the sceptic here choose not to read or understand basic science.
The decline of this site into an imitation of the numerous industry advocacy and lobbying sites continues.
maksimovich
“The graph indicates that in the time period between 1998 and 2003 the average chlorophyll concentration in the Global Ocean reached its minimum in 1998.”
Interesting indeed. The following paper confirms the well known fact, for us witnesses of el nino that sea “gets ill” during these events and then it happens what fishermen call the “red tide” (died plankton and other sea organisms) tinting the sea of red color.
The following paper explains this phenomena as a result of acidification by H2SO4:
http://www.scielo.org.pe/scielo.php?script=sci_arttext&pid=S1561-08882005000200002&lng=es&nrm=iso&tlng=es
(you can get a good translation of it with google translator)
Pamela
“Scientists have found a temporary “chemical equator” that separates the heavily polluted air of the Northern Hemisphere from the cleaner air of the Southern Hemisphere over the Western Pacific — only it isn’t where they expected to find it. ”
http://www.livescience.com/environment/080930-chemical-equator.html
DJ (12:58:26),
Since you claim that the increase in CO2 has been “proved” on “numerous” threads to have come from human activities, I would like to see that proof.
Take your time.
George E. Smith (09:41:54) :
Well I see in that color map, a global variation of more than 15 ppm of mid tropospheric CO2 abundance. (why do people keep on saying “by volume”). If they can identify the molecules as being of different species; why not just report abundance by molecular species. In the atmosphere there is only one volume; the total sample volume, so to measure any individual species by volume, you have to extractr every last specimen of a species from the sample, and none of any other species, and then reduce each to STP before you can measure its volume.
Simply counting molecules allows you to use an infinitesimally smaller sample.
ppmv in dry air is used instead of ppm by weight (wet or dry), simply because every (ideal) gas has the same volume and the same number of molecules for the same amount of moles in the mix: one mole (~32 g) of oxygen has the same volume as one mole (~28 g) of nitrogen,… This makes calculations of mixing ratios easier, no matter the sample size.
Why “dry”? Because water shows an enormous gradient from ground level up to high in the sky, the same volume of CO2 (compared to the O2/N2 level) would go up with height as the water vapor content drops. This is completely artificial, as the ratio between CO2 and O2/N2 doesn’t change with height…
But to get back to my point. The total range of CO2 abundance in this plot is about 15 years worth of annual baseline increases.
That does not make me comfortable that the 15 ppm global spread is simply a lack of adequate mixing time from some transient event. That 15 ppm spread would seem to be a stable global pattern that is being maintained by global variables.
The AIRS map is just a snapshot in summer, a winter snapshot shows the opposite colors… If you look at the MLO data for the same time stamp and color on the map, you will see that the local CO2 levels match (no coincidence, the AIRS satellite data are calibrated with the ground stations and flight measurements!).
See the seasonal variation from North to South at:
http://www.esrl.noaa.gov/gmd/Photo_Gallery/GMD_Figures/ccgg_figures/tn/co2_surface.png.html
Ferdinand,
Thanks for saving me the trouble.
I find it a strange phenomenon that seemingly intelligent people can’t grasp a simple concept like that. It cannot be lack of intelligence, but some emotion must be blocking the use of their intelligence. An unbiased 8 year old child could easily grasp the arithmentic.
@ur momisugly Ferdinand Engelbeen (12:55:50) :
So carbon dioxide in the atmosphere would be unchanged if not for man? How is it that CO2 has gone up and down in the past without man’s help?
I recall a book and move called an ‘Inconvenient Truth’ that showed a graph of CO2 going up and down quite naturally for thousands and thousands of year. How do you explain that?
Roger, it is called upwelling. The thermocline (the variably mixed water that sits on top of deeper, denser, colder water) is disturbed by wave action from trade winds and axial spin, thus allowing the more nutrient rich and colder underlayer water access to the top. Go here for a really good explanation.
http://oceanexplorer.noaa.gov/explorations/02quest/background/upwelling/upwelling.html
And while I don’t like to send people to wiki, it sometimes has a pretty good explanation, which is the case for the thermocline. But take anything at wiki with a grain of salt, since it gets edited frequently.
http://en.wikipedia.org/wiki/Thermocline
Typical anti-warming hype. One single study of the dispersion of CO2 from a nuclear explosion does not necessarily mean CO2 will spread the same way in general. This is typically bogus.
John Galt (12:55:30):
@Eric
…it’s plain ignorant for anybody to assume the world is in a natural steady state.
Check! Earth has never been in a natural steady state (as the whole Universe is not static). Take a look at this graph:
http://www.biocab.org/Geological_TS_SL_and_CO2.jpg