Characterizing Spatiotemporal Dynamics of CH 4 Fluxes from Rice Paddies of Cold Region in Heilongjiang Province under Climate Change

Tangzhe Nie, Zhongxue Zhang, Zhijuan Qi, Peng Chen, Zhongyi Sun and Xingchao Liu
Additional contact information
Tangzhe Nie: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Zhongxue Zhang: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Zhijuan Qi: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Peng Chen: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
Zhongyi Sun: Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
Xingchao Liu: School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China

IJERPH, 2019, vol. 16, issue 5, 1-21

Abstract: Paddy fields have become a major global anthropogenic CH 4 emission source, and climate change affects CH 4 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 CH 4 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 CH 4 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 CH 4 fluxes under RCP 4.5 and RCP 8.5 of four global climate models (GCMs) in Heilongjiang Province. During 1960–2015, the average CH 4 fluxes and climatic tendencies were 145.56 kg C/ha and 11.88 kg C/ha/(10a), respectively. Spatially, the CH 4 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 CH 4 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 distribution. The average climatic tendencies were 13.40 kg C/ha/(10a) and 29.86 kg C/ha/(10a), respectively, which decreased from west to east. The simulation scenario analysis showed that atmospheric CO 2 concentration and temperature affected CH 4 fluxes by changing soil organic carbon (SOC) content and plant biomass. This study indicated that a paddy ecosystem in a cold region is an important part of China’s greenhouse gas emission inventory in future scenarios.

Keywords: climate change; rice paddies of cold region; CH 4 fluxes; spatiotemporal distribution; DNDC model (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1660-4601/16/5/692/pdf (application/pdf)
https://www.mdpi.com/1660-4601/16/5/692/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:16:y:2019:i:5:p:692-:d:209270

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().