paper says CO2 does not cause warming …

This paper shows that CO2 concentration rises in the atmosphere follow temperature rise. That means the hypothesis that man-made CO2 causes warming is wrong: Science Direct: http://www.sciencedirect.com/science/article/pii/S0921818112001658

Global and Planetary Change

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

[…] Read it all

Highlights

► Changes in global atmospheric CO2 are lagging 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 explain a substantial part of the observed changes in atmospheric CO2 since January 1980. ► Changes in atmospheric CO2 are not tracking changes in human emissions. […]

[…]

Full-size image (71 K)

Fig. 1. Monthly global atmospheric CO2 (NOOA; green), monthly global sea surface temperature (HadSST2; blue stippled) and monthly global surface air temperature (HadCRUT3; red), since January 1980. Last month shown is December 2011.

Global atmospheric CO2 (Fig. 1) has increased steadily during the entire observation period since 1980. There is, however, a pronounced annual cyclic variation superimposed on this overall development, caused by seasonal changes in the magnitude of sources and sinks for CO2, controlled by dynamic exchanges with oceans and vegetation (IPCC AR4, 2007). The two temperature series HadSST2 and HadCRUT3 also show an overall increase over the period, but their detailed development is more complex than for CO2. In addition, they only show small net changes since early 2002 (Scafetta, 2011). […]

12. Conclusions

There exist a clear phase relationship between changes of atmospheric CO2 and the different global temperature records, whether representing sea surface temperature, surface air temperature, or lower troposphere temperature, with changes in the amount of atmospheric CO2 always lagging behind corresponding changes in temperature.

(1)

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.

(2)

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

(3)

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

(4)

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

(5)

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

(6)

CO2 released from anthropogene sources apparently has little influence on the observed changes in atmospheric CO2, and changes in atmospheric CO2 are not tracking changes in human emissions.

(7)

On the time scale investigated, the overriding effect of large volcanic eruptions appears to be a reduction of atmospheric CO2, presumably due to the dominance of associated cooling effects from clouds associated with volcanic gases/aerosols and volcanic debris.

(8)

Since at least 1980 changes in global temperature, and presumably especially southern ocean temperature, appear to represent a major control on changes in atmospheric CO2.

  1. Comment on “The phase relation between atmospheric carbon dioxide and global temperature” by Humlum, Stordahl and Solheim
  2. 2013, Global and Planetary Change

About Tom Harley

Amateur ecologist and horticulturalist and CEO of Kimberley Environmental Horticulture Inc. (Tom Harley)
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