Author Archives: gymnosperm

Emissivity of CO2

There is a lot of confusion about emissivity. Emissivity is the tendency to emit; particularly the tendency to emit light after absorbing it. In the infrared part of the spectrum, where the earth emits radiation towards the atmosphere, there is very … Continue reading

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Berkeley Earth, The Arbitrary Use of Parameters to Create a Spurious Correlation

The graphic above has been widely used to establish a relationship between human CO2 and temperature. I was unable to replicate it. Stephen Mosher very kindly steered me towards a link on the Berkeley Earth site with an excel sheet. Using … Continue reading

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Twitter is a Sack

If you can’t figure out what kind of sack… The real problem is that it is a confirmation bias, groupthink, censored, scored by perceived approval, no dissent allowed, we’re all grooving’, in crowd, don’t rock the boat, typical human doom … Continue reading

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MODTRAN Up and Down VII

One often hears it said that the “heat absorbing” properties of CO2 in the atmosphere are “well known” or “well understood”. This is definitely not the case. The properties of CO2 in the atmosphere are presupposed  to be simple, and held up … Continue reading

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Modtran Up and Down VI

This series is getting long, but there is one more avenue to explore before it can be finished. We left off with the kissing conundrum that was not completely resolved. That’s ok. We may not resolve this problem either. The kissing … Continue reading

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MODTRAN Up and Down V, The Kissing Conundrum

  We left off the last post with the puzzlement that Modtran looking up and down from the same altitude sees CO2 deviation from the blackbody spectrum, evidence of CO2 absorption and radiance, that matches almost exactly in intensity. This is illustrated … Continue reading

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MODTRAN Up and Down IV, Moving Higher

Time to make good on the promise to progress upwards. In the first post in this series we established that Modtran sees no significant deviation from the blackbody spectrum looking down in the CO2 bands until about one kilometer altitude. Looking … Continue reading

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