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- W2487123511 abstract "Given the importance of the potential positive feedback between methane (CH4) emissions and climate change, it is critical to accurately estimate the magnitude and spatiotemporal patterns of CH4 emissions from global rice fields and better understand the underlying determinants governing the emissions. Here we used a coupled biogeochemical model in combination with satellite-derived contemporary inundation area to quantify the magnitude and spatiotemporal variation of CH4 emissions from global rice fields and attribute the environmental controls of CH4 emissions during 1901–2010. Our study estimated that CH4 emissions from global rice fields varied from 18.3 ± 0.1 Tg CH4/yr (Avg. ±1 SD) under intermittent irrigation to 38.8 ± 1.0 Tg CH4/yr under continuous flooding in the 2000s, indicating that the magnitude of CH4 emissions from global rice fields is largely dependent on different water schemes. Over the past 110 years, our simulated results showed that global CH4 emissions from rice cultivation increased by 85%. The expansion of rice fields was the dominant factor for the increasing trends of CH4 emissions, followed by elevated CO2 concentration, and nitrogen fertilizer use. On the contrary, climate variability had reduced the cumulative CH4 emissions for most of the years over the study period. Our results imply that CH4 emissions from global rice fields could be reduced through optimizing irrigation practices. Therefore, the future magnitude of CH4 emissions from rice fields will be determined by the human demand for rice production as well as the implementation of optimized water management practices." @default.
- W2487123511 created "2016-08-23" @default.
- W2487123511 creator A5035197459 @default.
- W2487123511 creator A5041425147 @default.
- W2487123511 creator A5042328954 @default.
- W2487123511 creator A5054391590 @default.
- W2487123511 creator A5063100739 @default.
- W2487123511 creator A5076996352 @default.
- W2487123511 creator A5082310856 @default.
- W2487123511 creator A5084573823 @default.
- W2487123511 date "2016-09-01" @default.
- W2487123511 modified "2023-10-16" @default.
- W2487123511 title "Methane emissions from global rice fields: Magnitude, spatiotemporal patterns, and environmental controls" @default.
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