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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amtd-7-2405-2014
© Author(s) 2014. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
11 Mar 2014
Review status
This discussion paper has been under review for the journal Atmospheric Measurement Techniques (AMT). The revised manuscript was not accepted.
A DOAS-like method for total column of CO2 from ground-based FTS measurements of the direct solar beam
Y. F. Huo1,2, M. Z. Duan2, and W. S. Tian1 1Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China
2Key Laboratory of middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Abstract. A new algorithm, similar to that of DOAS method, is developed to retrieve the total column CO2 from the ground-based hyper-spectral measurements of direct solar beam. Other than spectrum fitting method, which is generally used in the optimal estimation algorithm, the radiances ratio at two wavelength named channel pair, where one is of weak and the other is of relatively strong absorption, is used to retrieve the total column CO2 in the Short Wave InfraRed(SWIR) band. Sensitivity studies show that this DOAS-like method is less dependent on the model parameters such as aerosols, water vapor, surface pressure, temperature, wavelength shift and signal noise, and the pairs of channels are carefully selected based on the sensitivity studies. To validate the algorithm, the FTS measurements located at Xi'Chong astronomical observatory are used to derive the total column CO2 amount, 272 pairs ratios are used in the retrieval and the results agree very well with that of GOSAT, which shows that the DOAS-like method could give reasonable value of XCO2.

Citation: Huo, Y. F., Duan, M. Z., and Tian, W. S.: A DOAS-like method for total column of CO2 from ground-based FTS measurements of the direct solar beam, Atmos. Meas. Tech. Discuss., 7, 2405-2423, doi:10.5194/amtd-7-2405-2014, 2014.
Y. F. Huo et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C882: 'Referee review', Anonymous Referee #1, 11 May 2014 Printer-friendly Version 
AC C2387: 'Response to Reviewer 1', YanFeng Huo, 28 Aug 2014 Printer-friendly Version Supplement 
 
RC C1391: 'Review of Huo et al', Anonymous Referee #2, 23 Jun 2014 Printer-friendly Version 
AC C2388: 'Response to Reviewer 2', YanFeng Huo, 28 Aug 2014 Printer-friendly Version Supplement 
Y. F. Huo et al.
Y. F. Huo et al.

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