Using Telluric Lines to Measure Atmospheric Gases and Climate Change

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The discussion centers on the potential use of telluric lines for accurately measuring atmospheric gases in conjunction with synchronous Earth temperature data. This approach aims to create an index that reflects gas abundance and the variation of heat transfer through these gases, which could enhance understanding of the effects of CO2 and other gases on climate change. While the method may not match the precision of direct measurements, it offers a promising avenue for assessing the relationship between atmospheric composition and temperature variations, contributing to climate change research.
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http://webusers.ct.astro.it/gca/papers/telluric.pdf

Would it be possible to use telluric lines to give accurate measurements of atmospheric gases along with synchronous Earth temperature measurements, thus giving an index for gas abundance and variation of heat transfer through same gases thus giving us a better way to
find effects of CO2 etc on climate change?
 
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It is probably not as accurate as direct measurements.
 

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