Articles | Volume 12, issue 6
Atmos. Meas. Tech., 12, 3403–3415, 2019
Atmos. Meas. Tech., 12, 3403–3415, 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,, 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,, 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,, 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,, 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,, 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.