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AMT | Articles | Volume 12, issue 1
Atmos. Meas. Tech., 12, 35-50, 2019
https://doi.org/10.5194/amt-12-35-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Meas. Tech., 12, 35-50, 2019
https://doi.org/10.5194/amt-12-35-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 03 Jan 2019

Research article | 03 Jan 2019

Using a speed-dependent Voigt line shape to retrieve O2 from Total Carbon Column Observing Network solar spectra to improve measurements of XCO2

Joseph Mendonca et al.
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Cited articles  
Abrarov, S. M. and Quine, B. M.: Efficient algorithmic implementation of the Voigt/complex error function based on exponential series approximation, Appl. Math. Comput., 218, 1894–1902, https://doi.org/10.1016/j.amc.2011.06.072, 2011. 
Batchelor, R. L., Strong, K., Lindenmaier, R., Mittermeier, R. L., Fast, H., Drummond, J. R., and Fogal, P. F.: A New Bruker IFS 125HR FTIR Spectrometer for the Polar Environment Atmospheric Research Laboratory at Eureka, Nunavut, Canada: Measurements and Comparison with the Existing Bomem DA8 Spectrometer, J. Atmos. Ocean. Tech., 26, 1328–1340, https://doi.org/10.1175/2009JTECHA1215.1, 2009. 
Bergland, G.: A radix-eight fast Fourier transform subroutine for real-valued series, IEEE T. Acoust. Speech, 17, 138–144, https://doi.org/10.1109/TAU.1969.1162043, 1969. 
Bui, T. Q., Long, D. A., Cygan, A., Sironneau, V. T., Hogan, D. W., Rupasinghe, P. M., Ciuryło, R., Lisak, D., and Okumura, M.: Observations of Dicke narrowing and speed dependence in air-broadened CO2 lineshapes near 2.06 µm, J. Chem. Phys., 141, 174301, https://doi.org/10.1063/1.4900502, 2014. 
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Short summary
In order to study the carbon cycle, accurate remote sensing measurements of XCO2 are required. This means that accurate absorption coefficients of CO2 and O2 in the retrieval algorithm are required. We use high-resolution laboratory spectra of O2 to derive accurate absorption coefficients. By applying the O2 absorption coefficients to the retrieval of XCO2 from ground-based solar absorption spectra we show that the error on retrieved XCO2 is decreased.
In order to study the carbon cycle, accurate remote sensing measurements of XCO2 are required....
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