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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Cited articles

Báez, A., Reyes, M., Rosas, I., and Mosino, P.: CO2 concentrations in the highly polluted atmosphere of Mexico City, Atmósfera, 1, available at: http://www.revistascca.unam.mx/atm/index.php/atm/article/view/8271 (last access: 20 December 2016), 1988.
Bland, J. M. and Altman, D.: Statistical methods for assessing agreement between two methods of clinical measurement, Lancet, 327, 307–310, https://doi.org/10.1016/S0140-6736(86)90837-8, 1986.
Chahine, M. T., Chen, L., Dimotakis, P., Jiang, X., Li, Q., Olsen, E. T., Pagano, T., Randerson, J., and Yung, Y. L.: Satellite remote sounding of mid-tropospheric CO2, Geophys. Res. Lett., 35, l17807, https://doi.org/10.1029/2008GL035022, 2008.
Crevoisier, C., Chédin, A., Matsueda, H., Machida, T., Armante, R., and Scott, N. A.: First year of upper tropospheric integrated content of CO2 from IASI hyperspectral infrared observations, Atmos. Chem. Phys., 9, 4797–4810, https://doi.org/10.5194/acp-9-4797-2009, 2009.
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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.