Study of filling techniques for methane flow data in an area of flooded rice immediate
DOI:
https://doi.org/10.5902/2179460X30763Keywords:
Methane Flux, Gap Filling, MDV, LUT, LIAbstract
Studies on the emission of methane gas (CH4) in agricultural ecosystems have received attention from the scientific communitybecause it plays an important role in the greenhouse effect. Flood irrigation agriculture, such as irrigated rice, represents a
considerable source of methane emissions (from 12 to 26 percent of all anthropogenic CH4 emissions in the world). Estimates of
CH4 emissions have also been performed through the eddy covariance technique. Although this methodology makes continuous
measurements of methane exchanges between the ecosystem and the atmosphere, failure to collect data can occur because the
system is quite sensitive, especially in the hard weather conditions. The gap filling in the methane data are essential to obtain
a daily or seasonal quantification of the emissions. In this study, different gap filling techniques are used to fill the CH4 fluxes
obtained by eddy covariance technique in an irrigated rice crop. The experimental data were obtained in Cachoeira do Sul - RS in
the period from 11/20/2015 to 04/30/2016. The Look-Up Table (LUT), which consists of filling gaps using averages of flux values
for periods with similar atmospheric conditions, was the technique that best close the gap in methane fluxes data.
Downloads
References
Acevedo, O. C., Moraes, O. L. L., Degrazia, G. A., Medeiros, L. E. (2006). Intermittency and the exchange of scalars in the nocturnal surface layer. Boundary-Layer Meteorology, 119(1), 41-55.
Alberto, M. C. R., Wassmann, R., Buresh, R. J., Quilty, J. R., Correa, T. Q., Sandro, J. M., Centeno, C. A. R. (2014). Measuring methane flux from irrigated rice fields by eddy covariance method using open-path gas analyzer. Field Crops Research, 160, 12-21.
Alvalá, P. C., Kirchhoff, V. W., Pavão, H. G. (1999). Metano Na Atmosfera. Biotecnologia Ciência & Desenvolvimento, 2, 39–43. Aubinet, M., Vesala, T., Papale, D. (2012). Eddy Covariance Measurements Over Urban Areas. Em: Eddy Covariance A Practical Guide to Measurement and Data Analysis-, August, p. 461.
Bhattacharyya, P., Neogi, S., Roy, K. S., Dash, P. K., Nayak, A. K., Mohapatra, T. (2014). Tropical low land rice ecosystem is a net carbon sink. Agriculture, Ecosystems and Environment, 189, 127-135.
BURBA G., ANDERSON D. (2005). A Brief practical Guide to Eddy Covariance Flux Measurements: Principles and workflow Examples for Scientific and industrial Application. LI-COR Biosciences.
CONAB: Companhia Nacional de Abastecimento (2016). Acompanhamento da Safra Brasileira de Grãos, vol 3. URL http: //www.conab.gov.br.
Dengel, S., Zona, D., Sachs, T., Aurela, M., Jammet, M., Parmentier, F. J. W., Oechel, W., Vesala, T. (2013). Testing the applicability of neural networks as a gap-filling method using CH4 flux data from high latitude wetlands. Biogeosciences, 10(12), 8185-8200.
Detto, M., Verfaillie, J., Anderson, F., Xu, L., Baldocchi, D. (2011). Comparing laser-based open- and closed-path gas analyzers to measure methane fluxes using the eddy covariance method. Agricultural and Forest Meteorology, 151(10), 1312-1324.
Diaz, M., Roberti, D. R. (2015). CÁLCULO DAS TROCAS DE CARBONO NUM AGROECOSSISTEMA DE ARROZ COM APLICAÇÃO DE TÉCNICAS DE PREENCHIMENTO DE FALHAS. Ciência e Natura, 37(0). Disponível em: http://cascavel. ufsm.br/revistas/ojs-2.2.2/index.php/cienciaenatura/article/view/16211.
Embrapa, E. B. D. P. A. (2006). Sistema brasileiro de classificação de solos.
Falge, E., Baldocchi, D., Olson, R. (2001). Gap filling strategies for long term energy flux data sets. Agricultural and Forest Meteorology, (107), 71-77. Disponível em: http://www.sciencedirect.com/science/article/pii/S0168192300002355.
Foken, T., Göockede, M., Mauder, M., Mahrt, L., Amiro, B., Munger, W. (2004). Post-Field Data Quality Control. Em: Handbook of Micrometeorology, pp. 181–208. Disponível em: http://dx.doi.org/10.1007/1-4020-2265-4_9%5Cnhttp: //link.springer.com/10.1007/1-4020-2265-4_9.
IPCC (2013). Working Group I Contribution to the IPCC Fifth Assessment Report, Climate Change 2013: The Physical Science Basis. Ipcc, AR5 (March 2013), 2014. Disponível em: http://ipccwg1.jp/AR4/meeting/pdf/SyR0407-siryo2. pdf{%}5Cnhttp://scholar.google.com/scholar?hl=en{&}btnG=Search{&}q=intitle: IPCC,+2014:+Climate+Change+2014:+Impacts,+Adaptation,+and+Vulnerability.+Par +A: +Global+and+Sectoral+Aspects.+Contribution+of+Working+Gro, arXiv:1011.1669v3.
Moffat, A. M., Papale, D., Reichstein, M., Hollinger, D. Y., Richardson, A. D., Barr, A. G., Beckstein, C., Braswell, B. H., Churkina, G., Desai, A. R., Falge, E., Gove, J. H., Heimann, M., Hui, D., Jarvis, A. J., Kattge, J., Noormets, A., Stauch, V. J. (2007). Comprehensive comparison of gap-filling techniques for eddy covariance net carbon fluxes. Agricultural and Forest Meteorology, 147(3-4), 209-232, URL http://linkinghub.elsevier.com/retrieve/pii/S016819230700216X.
Taiz, L., Zeiger, E. (2006). Fisiología Vegetal. Em: Fisiología Vegetal, pp. 536-537.
Downloads
Published
How to Cite
Issue
Section
License
To access the DECLARATION AND TRANSFER OF COPYRIGHT AUTHOR’S DECLARATION AND COPYRIGHT LICENSE click here.
Ethical Guidelines for Journal Publication
The Ciência e Natura journal is committed to ensuring ethics in publication and quality of articles.
Conformance to standards of ethical behavior is therefore expected of all parties involved: Authors, Editors, Reviewers, and the Publisher.
In particular,
Authors: Authors should present an objective discussion of the significance of research work as well as sufficient detail and references to permit others to replicate the experiments. Fraudulent or knowingly inaccurate statements constitute unethical behavior and are unacceptable. Review Articles should also be objective, comprehensive, and accurate accounts of the state of the art. The Authors should ensure that their work is entirely original works, and if the work and/or words of others have been used, this has been appropriately acknowledged. Plagiarism in all its forms constitutes unethical publishing behavior and is unacceptable. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable. Authors should not submit articles describing essentially the same research to more than one journal. The corresponding Author should ensure that there is a full consensus of all Co-authors in approving the final version of the paper and its submission for publication.
Editors: Editors should evaluate manuscripts exclusively on the basis of their academic merit. An Editor must not use unpublished information in the editor's own research without the express written consent of the Author. Editors should take reasonable responsive measures when ethical complaints have been presented concerning a submitted manuscript or published paper.
Reviewers: Any manuscripts received for review must be treated as confidential documents. Privileged information or ideas obtained through peer review must be kept confidential and not used for personal advantage. Reviewers should be conducted objectively, and observations should be formulated clearly with supporting arguments, so that Authors can use them for improving the paper. Any selected Reviewer who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the Editor and excuse himself from the review process. Reviewers should not consider manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the papers.
