Fingerprint of rice paddies in spatial–temporal dynamics of atmospheric methane concentration in monsoon Asia

Geli Zhang, Xiangming Xiao (), Jinwei Dong (), Fengfei Xin, Yao Zhang, Yuanwei Qin, Russell B. Doughty and Berrien Moore
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Geli Zhang: China Agricultural University
Xiangming Xiao: University of Oklahoma
Jinwei Dong: Chinese Academy of Sciences
Fengfei Xin: Fudan University
Yao Zhang: Columbia University
Yuanwei Qin: University of Oklahoma
Russell B. Doughty: University of Oklahoma
Berrien Moore: University of Oklahoma

Nature Communications, 2020, vol. 11, issue 1, 1-11

Abstract: Abstract Agriculture (e.g., rice paddies) has been considered one of the main emission sources responsible for the sudden rise of atmospheric methane concentration (XCH4) since 2007, but remains debated. Here we use satellite-based rice paddy and XCH4 data to investigate the spatial–temporal relationships between rice paddy area, rice plant growth, and XCH4 in monsoon Asia, which accounts for ~87% of the global rice area. We find strong spatial consistencies between rice paddy area and XCH4 and seasonal consistencies between rice plant growth and XCH4. Our results also show a decreasing trend in rice paddy area in monsoon Asia since 2007, which suggests that the change in rice paddy area could not be one of the major drivers for the renewed XCH4 growth, thus other sources and sinks should be further investigated. Our findings highlight the importance of satellite-based paddy rice datasets in understanding the spatial–temporal dynamics of XCH4 in monsoon Asia.

Date: 2020
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DOI: 10.1038/s41467-019-14155-5

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