Characterizing Spatiotemporal Dynamics of CH₄ Fluxes from Rice Paddies of Cold Region in Heilongjiang Province under Climate Change

International Journal of Environmental Research and Public Health
Tangzhe NieXingchao Liu

Abstract

Paddy fields have become a major global anthropogenic CH₄ emission source, and climate change affects CH₄ emissions from paddy ecosystems by changing crop growth and the soil environment. It has been recognized that Heilongjiang Province has become an important source of CH₄ emission due to its dramatically increased rice planting area, while less attention has been paid to characterize the effects of climate change on the spatiotemporal dynamics of CH₄ fluxes. In this study, we used the calibrated and validated Long Ashton Research Station Weather Generator (LARS-WG) model and DeNitrification-DeComposition (DNDC) model to simulate historical and future CH₄ fluxes under RCP 4.5 and RCP 8.5 of four global climate models (GCMs) in Heilongjiang Province. During 1960⁻2015, the average CH₄ fluxes and climatic tendencies were 145.56 kg C/ha and 11.88 kg C/ha/(10a), respectively. Spatially, the CH₄ fluxes showed a decreasing trend from west to east, and the climatic tendencies in the northern and western parts were higher. During 2021⁻2080, the annual average CH₄ fluxes under RCP 4.5 and RCP 8.5 were predicted to be 213.46 kg C/ha and 252.19 kg C/ha, respectively, and their spatial distributions were similar to the historical distribu...Continue Reading

References

Feb 1, 2007·Plant, Cell & Environment·Elizabeth A Ainsworth, Alistair Rogers
Sep 11, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Pete SmithJo Smith
Jul 15, 2011·Nature·Kees Jan van GroenigenBruce A Hungate
May 31, 2016·The Science of the Total Environment·Kazunori MinamikawaTsuneo Kuwagata

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Citations

Aug 23, 2019·International Journal of Environmental Research and Public Health·Xiangwen WuXingfeng Dong

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Software Mentioned

Arcmap
WG
DNDC
LARS
MATLAB

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