The Influence of IR Absorption and Backscatter Radiation from CO<sub>2</sub> on Air Temperature during Heating in a Simulated Earth/Atmosphere Experiment
- 1 Former Senior Research Scientist at Nycomed Pharma, Oslo, Norway
- 2 Former Research Fellow at Max-Planck-Institute for Physiological and Clinical Research, Munich, Germany
- 3 Former Research Scientist at Telenor (Televerkets) Research Department, Fornebu, Norway
Abstract
The Greenhouse Effect was simulated in a laboratory setup, consisting of a heated ground area and two chambers, one filled with air and one filled with air or CO 2 . While heating the gas the temperature and IR radiation in both chambers were measured. IR radiation was produced by heating a metal plate mounted on the rear wall. Reduced IR radiation through the front window was observed when the air in the foremost chamber was exchanged with CO 2 . In the rear chamber, we observed increased IR radiation due to backscatter from the front chamber. Based on the Stefan Boltzmann’s law, this should increase the temperature of the air in the rear chamber by 2.4 to 4 degrees, but no such increase was found. A thermopile, made to increase the sensitivity and accuracy of the temperature measurements, showed that the temperature with CO 2 increased slightly, about 0.5%.
- Tyndall, J. (1859) On the Transmission of Heat of Different Qualities through Gases of Different Kinds. Proceedings of the Royal Institution, 3, 155-158.
- Figure 1 Is Modified from Figure in. https://skepticalscience.com/empirical-evidence-for-co2-enhanced-greenhouse-effect-intermediate.htm
- Houghton, J.T., Meira Filho, L.G., Griggs, D.J. and Maskell, K. (1997) An Introduction to Simple Climate Models Used in the IPCC Second Assessment Report. IPCC Technical Paper II—February IPCC, Geneva, 51.
- Benestad, R.E. (2006) Solar Activity and Earth’s Climate. Springer, Berlin.
- Pierrehumbert, R.T. (2011) Infrared Radiation and Planetary Temperature. Physics Today, 64, 33-38. https://geosci.uchicago.edu/~rtp1/papers/PhysTodayRT2011.pdf https://doi.org/10.1063/1.3541943
- Harde, H. (2017) Radiation Transfer Calculations and Assessment of Global Warming by CO2. International Journal of Atmospheric Sciences, 2017, Article ID: 9251034. https://doi.org/10.1155/2017/9251034
- Philipona, R., Dürr, B., Marty, C., Ohmura, A. and Wild, M. (2004) Radiative Forcing—Measured at Earth’s Surface—Corroborate the Increasing Greenhouse Effect. Geophysical Research Letter, 31, L03202. https://doi.org/10.1029/2003GL018765
- Feldman, R., et al. (2015) Observational Determination of Surface Radiative Forcing by CO2 from 2000 to 2010. Nature, 519, 339-343. http://www.nature.com https://doi.org/10.1038/nature14240
- https://phys.org/news/2015-02-carbon-dioxide-greenhouse-effect.html
- IPCC Assessment Report 4. https://www.ipcc.ch/site/assets/uploads/2018/03/ar4-wg1-chapter1.pdf
- IPCC Fifth Assessment Report (2013). http://climate.envsci.rutgers.edu/climdyn2013/IPCC/IPCC_WGI12-RadiativeForcing.pdf
- IPCC Fifth Assessment Report. Anthropogenic and Natural Radiative Forcing Supplementary Material. https://www.ipcc.ch/pdf/assessment-report/ar5/wg1/supplementary/WG1AR5_Ch08SM_FINAL.pdf
- IPCC Fourth Assessment Report (2007) Climate Change 2007. https://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch2s2-2.html
- Myhre, G. D., et al. (2013) Anthropogenic and Natural Radiative Forcing Supplementary Material. In: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Anthropogenic and Natural Radiative Forcing Supplementary Material, 16. https://www.ipcc.ch/site/assets/uploads/2018/07/WGI_ AR5.Chap_.8_SM.pdf