This site is a reference point for those with a cool head for climate science, arguably the most political science ever. When the government and most of the media concentrate on alarmism, this site is the antidote for those who don't believe the scare stories - YOU ARE NOT ALONE! (blog started on 7/11/07) We have over 1.8 million hits and blog is updated regularly most weeks.
Sunday 14 May 2023
NEW STUDY APPEARS TO SHOW GLOBAL WARMING IS NOT CAUSED BY CO2
Here is an interesting paper which shows that the observed global warming is likely to be caused mainly by a reduction in cloud cover, with only a very small proportion caused by man made CO2.
No tricks Zone? With increased co2 in the atmopshere, clouds will reflect less radiation back to space. Therefore, overall clouds are a positive feedback to increased co2 in the atmosphere.
A 2019 simulation predicts that if greenhouse gases reach three times the current level of atmospheric carbon dioxide that stratocumulus clouds could abruptly disperse, contributing to additional global warming.[74][11]
[[[[[Thus, not only is the “causality used in IPCC reports wrong,” but “the greenhouse effect cannot explain climate change.”]]]]]
A drop in radiation in the spectral bands of co2 and ch4 were observed by satellites in several papers. Observations match that of the theory of GHG warming of the earth.
https://skepticalscience.com/news.php?n=73
What they found was a drop in outgoing radiation at the wavelength bands that greenhouse gases such as CO2 and methane (CH4) absorb energy. The change in outgoing radiation over CO2 bands was consistent with theoretical expectations. Thus the paper found "direct experimental evidence for a significant increase in the Earth's greenhouse effect".
This result has been confirmed by subsequent papers using the latest satellite data. Griggs 2004 compares the 1970 and 1997 spectra with additional satellite data from the NASA AIRS satellite launched in 2003. Chen 2007 extends this analysis to 2006 using data from the AURA satellite launched in 2004. Both papers found the observed differences in CO2 bands matched the expected changes based on rising CO2 levels. Thus we have empirical evidence that increased CO2 is preventing longwave radiation from escaping out to space.
There is less radiation leaving the atmosphere and is observed by our satellites. There is more radiation observed hitting the earth's surface as measured by instruments in the spectrums of the different GHGs. The earth warming by GHGs is rock solid and that is why it is called a scientific theory. In science terms, this is a fact of science.
https://skepticalscience.com/news.php?n=73
Measurements of downward longwave radiation What happens to longwave radiation that gets absorbed by greenhouse gases? The energy heats the atmosphere which in turn re-radiates longwave radiation. This re-radiated energy goes in all directions. Some of it makes its way back to the surface of the earth. Hence we expect to find increasing downward longwave radiation as CO2 levels increase.
Philipona 2004 finds that this is indeed the case - that downward longwave radiation is increasing due to an enhanced greenhouse effect. Evans 2006 takes this analysis further. By analysing high resolution spectral data, the increase in downward radiation can be quantitatively attributed to each of several anthropogenic gases. The results lead the authors to conclude that "this experimental data should effectively end the argument by skeptics that no experimental evidence exists for the connection between greenhouse gas increases in the atmosphere and global warming."
So we have multiple lines of empirical evidence for CO2 warming. Lab tests show CO2 absorbing longwave radiation. Satellite measurements confirm that less longwave radiation is escaping to space. Surface measurements detect increased longwave radiation returning back to Earth at wavelengths matching increased CO2 warming. And of course the result of this energy imbalance is the accumulation of heat over the last 40 years.
No tricks Zone? With increased co2 in the atmopshere, clouds will reflect less radiation back to space. Therefore, overall clouds are a positive feedback to increased co2 in the atmosphere.
ReplyDeletehttps://en.wikipedia.org/wiki/Climate_change_feedback#Cloud_feedback
A 2019 simulation predicts that if greenhouse gases reach three times the current level of atmospheric carbon dioxide that stratocumulus clouds could abruptly disperse, contributing to additional global warming.[74][11]
No explanation for why the clouds changed?
ReplyDelete[[[[[Thus, not only is the “causality used in IPCC reports wrong,” but “the greenhouse effect cannot explain climate change.”]]]]]
A drop in radiation in the spectral bands of co2 and ch4 were observed by satellites in several papers. Observations match that of the theory of GHG warming of the earth.
https://skepticalscience.com/news.php?n=73
What they found was a drop in outgoing radiation at the wavelength bands that greenhouse gases such as CO2 and methane (CH4) absorb energy. The change in outgoing radiation over CO2 bands was consistent with theoretical expectations. Thus the paper found "direct experimental evidence for a significant increase in the Earth's greenhouse effect".
This result has been confirmed by subsequent papers using the latest satellite data. Griggs 2004 compares the 1970 and 1997 spectra with additional satellite data from the NASA AIRS satellite launched in 2003. Chen 2007 extends this analysis to 2006 using data from the AURA satellite launched in 2004. Both papers found the observed differences in CO2 bands matched the expected changes based on rising CO2 levels. Thus we have empirical evidence that increased CO2 is preventing longwave radiation from escaping out to space.
There is less radiation leaving the atmosphere and is observed by our satellites. There is more radiation observed hitting the earth's surface as measured by instruments in the spectrums of the different GHGs. The earth warming by GHGs is rock solid and that is why it is called a scientific theory. In science terms, this is a fact of science.
ReplyDeletehttps://skepticalscience.com/news.php?n=73
Measurements of downward longwave radiation
What happens to longwave radiation that gets absorbed by greenhouse gases? The energy heats the atmosphere which in turn re-radiates longwave radiation. This re-radiated energy goes in all directions. Some of it makes its way back to the surface of the earth. Hence we expect to find increasing downward longwave radiation as CO2 levels increase.
Philipona 2004 finds that this is indeed the case - that downward longwave radiation is increasing due to an enhanced greenhouse effect. Evans 2006 takes this analysis further. By analysing high resolution spectral data, the increase in downward radiation can be quantitatively attributed to each of several anthropogenic gases. The results lead the authors to conclude that "this experimental data should effectively end the argument by skeptics that no experimental evidence exists for the connection between greenhouse gas increases in the atmosphere and global warming."
So we have multiple lines of empirical evidence for CO2 warming. Lab tests show CO2 absorbing longwave radiation. Satellite measurements confirm that less longwave radiation is escaping to space. Surface measurements detect increased longwave radiation returning back to Earth at wavelengths matching increased CO2 warming. And of course the result of this energy imbalance is the accumulation of heat over the last 40 years.