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From: https://wattsupwiththat.com/2015/05/12/22-very-inconvenient-climate-truths

22 Very Inconvenient Climate Truths

Guest Blogger / May 12, 2015

Here are 22 good reasons not to believe the statements made by the Intergovernmental Panel on Climate Change (IPCC)

Guest essay by Jean-Pierre Bardinet.

According to the official statements of the IPCC “Science is clear” and non-believers cannot be trusted.

Quick action is needed! For more than 30 years we have been told that we must act quickly and that after the next three or five years it will be too late (or even after the next 500 days according to the French Minister of foreign affairs speaking in 2014) and the Planet will be beyond salvation and become a frying pan -on fire- if we do not drastically reduce our emissions of CO2, at any cost, even at the cost of economic decline, ruin and misery.

But anyone with some scientific background who takes pains to study the topics at hand is quickly led to conclude that the arguments of the IPCC are inaccurate, for many reasons of which here is a non-exhaustive list.

The 22 Inconvenient Truths

1. The Mean Global Temperature has been stable since 1997, despite a continuous increase of the CO2 content of the air: how could one say that the increase of the CO2 content of the air is the cause of the increase of the temperature? (discussion: p. 4)

2. 57% of the cumulative anthropic emissions since the beginning of the Industrial revolution have been emitted since 1997, but the temperature has been stable. How to uphold that anthropic CO2 emissions (or anthropic cumulative emissions) cause an increase of the Mean Global Temperature?

[Note 1: since 1880 the only one period where Global Mean Temperature and CO2 content of the air increased simultaneously has been 1978-1997. From 1910 to 1940, the Global Mean Temperature increased at about the same rate as over 1978-1997, while CO2 anthropic emissions were almost negligible. Over 1950-1978 while CO2 anthropic emissions increased rapidly the Global Mean Temperature dropped. From Vostok and other ice cores we know that it’s the increase of the temperature that drives the subsequent increase of the CO2 content of the air, thanks to ocean out-gassing, and not the opposite. The same process is still at work nowadays] (discussion: p. 7)

3. The amount of CO2 of the air from anthropic emissions is today no more than 6% of the total CO2 in the air (as shown by the isotopic ratios 13C/12C) instead of the 25% to 30% said by IPCC. (discussion: p. 9)

4. The lifetime of CO2 molecules in the atmosphere is about 5 years instead of the 100 years said by IPCC. (discussion: p. 10)

5. The changes of the Mean Global Temperature are more or less sinusoidal with a well defined 60 year period. We are at a maximum of the sinusoid(s) and hence the next years should be cooler as has been observed after 1950. (discussion: p. 12)

6. The absorption of the radiation from the surface by the CO2 of the air is nearly saturated. Measuring with a spectrometer what is left from the radiation of a broadband infrared source (say a black body heated at 1000°C) after crossing the equivalent of some tens or hundreds of meters of the air, shows that the main CO2 bands (4.3 µm and 15 µm) have been replaced by the emission spectrum of the CO2 which is radiated at the temperature of the trace-gas. (discussion: p. 14)

7. In some geological periods the CO2 content of the air has been up to 20 times today’s content, and there has been no runaway temperature increase! Why would our CO2 emissions have a cataclysmic impact? The laws of Nature are the same whatever the place and the time. (discussion: p. 17)

8. The sea level is increasing by about 1.3 mm/year according to the data of the tide-gauges (after correction of the emergence or subsidence of the rock to which the tide gauge is attached, nowadays precisely known thanks to high precision GPS instrumentation); no acceleration has been observed during the last decades; the raw measurements at Brest since 1846 and at Marseille since the 1880s are slightly less than 1.3 mm/year. (discussion: p. 18)

9. The “hot spot” in the inter-tropical high troposphere is, according to all “models” and to the IPCC reports, the indubitable proof of the water vapour feedback amplification of the warming: it has not been observed and does not exist. (discussion: p. 20)

10. The water vapour content of the air has been roughly constant since more than 50 years but the humidity of the upper layers of the troposphere has been decreasing: the IPCC foretold the opposite to assert its “positive water vapour feedback” with increasing CO2. The observed “feedback” is negative. (discussion: p.22)

11. The maximum surface of the Antarctic ice-pack has been increasing every year since we have satellite observations. (discussion: p. 24)

12. The sum of the surfaces of the Arctic and Antarctic icepacks is about constant, their trends are phase-opposite; hence their total albedo is about constant. (discussion: p. 25)

13. The measurements from the 3000 oceanic ARGO buoys since 2003 may suggest a slight decrease of the oceanic heat content between the surface and a depth 700 m with very significant regional differences. (discussion: p. 27)

14. The observed outgoing longwave emission (or thermal infrared) of the globe is increasing, contrary to what models say on a would-be “radiative imbalance”; the “blanket” effect of CO2 or CH4 “greenhouse gases” is not seen. (discussion:p. 29)

15. The Stefan Boltzmann formula does not apply to gases, as they are neither black bodies, nor grey bodies: why does the IPCC community use it for gases ? (discussion: p. 30)

16. The trace gases absorb the radiation of the surface and radiate at the temperature of the air which is, at some height, most of the time slightly lower that of the surface. The trace-gases cannot “heat the surface“, according to the second principle of thermodynamics which prohibits heat transfer from a cooler body to a warmer body. (discussion: p. 32)

17. The temperatures have always driven the CO2 content of the air, never the reverse. Nowadays the net increment of the CO2 content of the air follows very closely the inter-tropical temperature anomaly. (discussion: p. 33)

18. The CLOUD project at the European Center for Nuclear Research is probing the Svensmark-Shaviv hypothesis on the role of cosmic rays modulated by the solar magnetic field on the low cloud coverage; the first and encouraging results have been published in Nature. (discussion: p. 36)

19. Numerical “Climate models” are not consistent regarding cloud coverage which is the main driver of the surface temperatures. Project Earthshine (Earthshine is the ghostly glow of the dark side of the Moon) has been measuring changes of the terrestrial albedo in relation to cloud coverage data; according to cloud coverage data available since 1983, the albedo of the Earth has decreased from 1984 to 1998, then increased up to 2004 in sync with the Mean Global Temperature. (discussion: p. 37)

20. The forecasts of the “climate models” are diverging more and more from the observations. A model is not a scientific proof of a fact and if proven false by observations (or falsified) it must be discarded, or audited and corrected. We are still waiting for the IPCC models to be discarded or revised; but alas IPCC uses the models financed by the taxpayers both to “prove” attributions to greenhouse gas and to support forecasts of doom. (discussion: p. 40)

21. As said by IPCC in its TAR (2001) “we are dealing with a coupled non-linear chaotic system, and therefore the long-term prediction of future climate states is not possible.” Has this state of affairs changed since 2001? Surely not for scientific reasons. (discussion: p. 43)

22. Last but not least the IPCC is neither a scientific organization nor an independent organization: the summary for policy makers, the only part of the report read by international organizations, politicians and media is written under the very close supervision of the representative of the countries and of the non-governmental pressure groups.

The governing body of the IPCC is made of a minority of scientists almost all of them promoters of the environmentalist ideology, and a majority of state representatives and of non-governmental green organizations. (discussion: p. 46)


Jean Poitou and François-Marie Bréon are distinguished members of the climate establishment and redactors of parts of the IPCC fifth assessment report report (AR5).

Jean Poitou is a physicist and climatologist, graduated from Ecole Supérieure de Physique et Chimie (Physics and Chemistry engineering college) and is climatologist at the Laboratory of the climate and environment sciences at IPSL, a joint research lab from CEA, CNRS, and UVSQ (*). He has written a book on the Climate for the teachers of secondary schools

François-Marie Bréon at CEA since 1993, has published 85 articles, is Directeur de recherche at CNRS, and author of the IPCC report 2013; he has been scientific manager of the ICARE group (CNES, CNRS, University of Lille), and of the POLDER and MicroCarb Space missions

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