Articles | Volume 12, issue 6
Atmos. Meas. Tech., 12, 3403–3415, 2019
https://doi.org/10.5194/amt-12-3403-2019
Atmos. Meas. Tech., 12, 3403–3415, 2019
https://doi.org/10.5194/amt-12-3403-2019

Research article 27 Jun 2019

Research article | 27 Jun 2019

Application of open-path Fourier transform infrared spectroscopy (OP-FTIR) to measure greenhouse gas concentrations from agricultural fields

Cheng-Hsien Lin et al.

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Cited articles

ASTM International: ASTM E1865-97(2013) Standard Guide for Open-Path Fourier Transform Infrared (OP/FT-IR) Monitoring of Gases and Vapors in Air, West Conshohocken, PA, https://doi.org/10.1520/E1865-97R13, 2013a. 
ASTM International: ASTM E1982-98(2013) Standard Practice for Open-Path Fourier Transform Infrared (OP/FT-IR) Monitoring of Gases and Vapors in Air, West Conshohocken, PA, https://doi.org/10.1520/E1982-98R13, 2013b. 
Bacsik, Z., Komlosi, V., Ollar, T., and Mink, J.: Comparison of open path and extractive long-path FTIR techniques in detection of air pollutants, Appl. Spectrosc. Rev., 41, 77–97, https://doi.org/10.1080/05704920500385494, 2006. 
Bai, M., Suter, H., Lam, S. K., Sun, J. L., and Chen, D. L.: Use of open-path FTIR and inverse dispersion technique to quantify gaseous nitrogen loss from an intensive vegetable production site, Atmos. Environ., 94, 687–691, https://doi.org/10.1016/j.atmosenv.2014.06.013, 2014. 
Bai, M., Suter, H., Lam, S. K., Davies, R., Flesch, T. K., and Chen, D. L.: Gaseous emissions from an intensive vegetable farm measured with slant-path FTIR technique, Agric. For. Meteorol., 258, 50–55, https://doi.org/10.1016/j.agrformet.2018.03.001, 2018. 
Short summary
The open-path FTIR (OP-FTIR) is often used to measure the atmospheric gas composition and concentrations. The OP-FTIR, however, is sensitive to the changed ambient factors, which likely led to quantitative biases. This study developed methods to minimize the effect of the ambient temperature and humidity on N2O/CO2 quantification. These methods can help the users who implement the OP-FTIR to estimate gas fluxes in the agroecosystem achieve more precise and accurate estimations.