Spatial-Temporal Changes of Methane Content in the Atmosphere for Selected Countries and Regions with High Methane Emission from Rice Cultivation
Irrigated and flooded rice is associated with methane (CH<sub>4</sub>) emissions. CH<sub>4</sub> is one of the most important anthropogenic greenhouse gases (GHG) in the atmosphere. Nowadays, mapping CH<sub>4</sub> content at a global scale is possible using satel...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/02def7a5b4a64581bacbd889c7021ebd |
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| Sumario: | Irrigated and flooded rice is associated with methane (CH<sub>4</sub>) emissions. CH<sub>4</sub> is one of the most important anthropogenic greenhouse gases (GHG) in the atmosphere. Nowadays, mapping CH<sub>4</sub> content at a global scale is possible using satellite sensors. Sample of such a sensor is TROPOspheric Monitoring Instrument (TROPOMI) placed on the Sentinel-5 Precursor (Sentinel-5P) satellite board. In this study, the evaluation of spatial-temporal changes in CH<sub>4</sub> content in the atmosphere for selected countries and regions with high CH<sub>4</sub> emissions from rice cultivation in 2019–2021 was performed. Visual evaluation of the spatial variability on CH<sub>4</sub> content for the total study period indicates higher CH<sub>4</sub> content for almost all areas with high rice concentration. This was confirmed by positive correlations between CH<sub>4</sub> content in the atmosphere and estimated GHG emissions from croplands analyzed separately for each studied country/region. In addition, seasonal changes in CH<sub>4</sub> content in the atmosphere were observed. The lowest CH<sub>4</sub> content was observed at the beginning of the year (for the first quarter of the year) and the highest for the third quarter of the year. Moreover, a long-term increase in CH<sub>4</sub> was noticed. Regression analysis revealed that the mean increase in CH<sub>4</sub> content in most of the studied regions/countries was about 15 ppb per year. CH<sub>4</sub> content evaluated with the use of satellite data from Sentinel-5P is a reliable data source and can be used for the analysis of temporal changes at various spatial scales, including regions and countries. |
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