Category Archives: MODTRAN

A Brief History of Muddled Thinking about the Greenhouse Effect

We humans kick up a lot of dust and burn a lot of stuff. A concept developed in the 1970’s was the “human volcano”. There is a lot of truth in this analogy. Back then, despite dead wrong rants, the … Continue reading

Posted in Climate, Greenhouse Effect, Greenhouse Spectra, MODTRAN | 5 Comments

MODTRAN, The One ppm Exercise

MODTRAN is impressively nuanced sometimes. Ordinarily MODTRAN is used on a macro scale at plausible altitudes and greenhouse gas concentrations, but it definitely resolves at single meters of altitude and single ppm of greenhouse gasses. Here we explore one ppm … 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

Posted in Climate, MODTRAN | 6 Comments