Modelling CO2 and CH4 emissions from drained peatlands with grass cultivation by the BASGRA-BGC model
نویسندگان
چکیده
Cultivated peatlands under drainage practices contribute significant carbon losses from agricultural sector in the Nordic countries. In this research, we developed BASGRA-BGC model coupled with hydrological, soil decomposition and methane modules to simulate dynamic of water table level (WTL), dioxide (CO2) (CH4) emissions for cultivated peatlands. The field measurements four experimental sites Finland, Denmark Norway were used validate predictive skills novel different WTL management practices, climatic conditions properties. Compared daily observations, performed well terms RMSE (Root Mean Square Error; 0.06–0.11 m, 1.22–2.43 gC/m2/day, 0.002–0.330 kgC/ha/day WTL, CO2 CH4, respectively), NRMSE (Normalized Root 10.3–18.3%, 13.0–18.6%, 15.3–21.9%) Pearson's r (Pearson correlation coefficient; 0.60–0.91, 0.76–0.88, 0.33–0.80). daily/seasonal variabilities therefore captured aggregated results corresponded annual estimations. We further provided an example on model's potential use improving mitigate CH4 while maintaining grass production. At all study sites, simulated WTLs rates showed a negative correlation. Therefore, controlling could effectively reduce losses. However, given highly diverse within individual WTLs, adding indicators (e.g. moisture peat quality) would improve our capacity assess effectiveness specific mitigation such as control rewetting.
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ژورنال
عنوان ژورنال: Science of The Total Environment
سال: 2021
ISSN: ['0048-9697', '1879-1026']
DOI: https://doi.org/10.1016/j.scitotenv.2020.144385