Using Telluric Lines to Measure Atmospheric Gases and Climate Change

[wolram]

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?

 

[Xnn]

It is probably not as accurate as direct measurements.