Articles | Volume 25, issue 12
https://doi.org/10.5194/acp-25-6299-2025
https://doi.org/10.5194/acp-25-6299-2025
Research article
 | 
26 Jun 2025
Research article |  | 26 Jun 2025

Estimation of seasonal methane fluxes over a Mediterranean rice paddy area using the Radon Tracer Method (RTM)

Roger Curcoll, Alba Àgueda, Josep-Anton Morguí, Lídia Cañas, Sílvia Borràs, Arturo Vargas, and Claudia Grossi

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Cited articles

Àgueda, A., Grossi, C., Pastor, E., Rioja, E., Sánchez-García, L., Batet, Ò., Curcoll, R., Ealo, M., Nofuentes, M., Occhipinti, P., Rodó, X., and Morguí, J.-A.: Temporal and spatial variability of ground level atmospheric methane concentrations in the Ebro River Delta, Atmos. Pollut. Res., 8, 741–753, https://doi.org/10.1016/j.apr.2017.01.009, 2017. 
Ahmadov, R., Gerbig, C., Kretschmer, R., Körner, S., Rödenbeck, C., Bousquet, P., and Ramonet, M.: Comparing high resolution WRF-VPRM simulations and two global CO2 transport models with coastal tower measurements of CO2, Biogeosciences, 6, 807–817, https://doi.org/10.5194/bg-6-807-2009, 2009. 
Alberto, M. C. R., Wassmann, R., Buresh, R. J., Quilty, J. R., Correa, T. Q., Sandro, J. M., and Centeno, C. A. R.: Measuring methane flux from irrigated rice fields by eddy covariance method using open-path gas analyzer, F. Crop. Res., 160, 12–21, https://doi.org/10.1016/j.fcr.2014.02.008, 2014. 
Alberto, M. C. R., Wassmann, R., Gummert, M., Buresh, R. J., Quilty, J. R., Correa, T. Q., Centeno, C. A. R., and Oca, G. M.: Straw incorporated after mechanized harvesting of irrigated rice affects net emissions of CH4 and CO2 based on eddy covariance measurements, F. Crop. Res., 184, 162–175, https://doi.org/10.1016/j.fcr.2015.10.004, 2015. 
Aliaga, D., Sinclair, V. A., Andrade, M., Artaxo, P., Carbone, S., Kadantsev, E., Laj, P., Wiedensohler, A., Krejci, R., and Bianchi, F.: Identifying source regions of air masses sampled at the tropical high-altitude site of Chacaltaya using WRF-FLEXPART and cluster analysis, Atmos. Chem. Phys., 21, 16453–16477, https://doi.org/10.5194/acp-21-16453-2021, 2021. 
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Short summary
In this work, the methane emissions from the rice crops of the Ebro Delta were estimated with the Radon Tracer Method, using back trajectories and radon and methane observations. Estimated fluxes show a strong seasonality with maximums in October, corresponding with the period of harvest and straw incorporation. The estimated annual methane emission was about 262.8 kg CH4 ha‑1. Results were compared with fluxes obtained with static chambers showing strong agreement between both methodologies.
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