Articles | Volume 10, issue 7
https://doi.org/10.5194/amt-10-2425-2017
https://doi.org/10.5194/amt-10-2425-2017
Research article
 | 
06 Jul 2017
Research article |  | 06 Jul 2017

Background CO2 levels and error analysis from ground-based solar absorption IR measurements in central Mexico

Jorge L. Baylon, Wolfgang Stremme, Michel Grutter, Frank Hase, and Thomas Blumenstock

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Latest update: 20 Nov 2024
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Short summary
In this investigation we analyze two common optical configurations to retrieve CO2 total column amounts from solar absorption infrared spectra. The noise errors using either a KBr or CaF2 beam splitter, a main component of a Fourier transform infrared spectrometer, are quantified in order to assess the relative precisions of the measurements. A 3-year XCO2 time series at the high-altitude site of Altzomoni in central Mexico presents clear annual and diurnal cycles and a trend of +2.2 ppm yr-1.