Emissions of CO 2, CH 4, and N 2 O Fluxes from Forest Soil in Permafrost Region of Daxing’an Mountains, Northeast China

Xiangwen Wu, Shuying Zang, Dalong Ma, Jianhua Ren, Qiang Chen and Xingfeng Dong
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Xiangwen Wu: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China
Shuying Zang: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China
Dalong Ma: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China
Jianhua Ren: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China
Qiang Chen: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China
Xingfeng Dong: Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, China

IJERPH, 2019, vol. 16, issue 16, 1-14

Abstract: With global warming, the large amount of greenhouse gas emissions released by permafrost degradation is important in the global carbon and nitrogen cycle. To study the feedback effect of greenhouse gases on climate change in permafrost regions, emissions of CO 2 , CH 4 , and N 2 O were continuously measured by using the static chamber-gas chromatograph method, in three forest soil ecosystems ( Larix gmelinii , Pinus sylvestris var. mongolica , and Betula platyphylla ) of the Daxing’an Mountains, northeast China, from May 2016 to April 2018. Their dynamic characteristics, as well as the key environmental affecting factors, were also analyzed. The results showed that the flux variation ranges of CO 2 , CH 4 , and N 2 O were 7.92 ± 1.30~650.93 ± 28.12 mg·m −2 ·h −1 , −57.71 ± 4.65~32.51 ± 13.03 ug·m −2 ·h −1 , and −3.87 ± 1.35~31.1 ± 2.92 ug·m −2 ·h −1 , respectively. The three greenhouse gas fluxes showed significant seasonal variations, and differences in soil CO 2 and CH 4 fluxes between different forest types were significant. The calculation fluxes indicated that the permafrost soil of the Daxing’an Mountains may be a potential source of CO 2 and N 2 O, and a sink of CH 4 . Each greenhouse gas was controlled using different key environmental factors. Based on the analysis of Q 10 values and global warming potential, the obtained results demonstrated that greenhouse gas emissions from forest soil ecosystems in the permafrost region of the Daxing’an Mountains, northeast China, promote the global greenhouse effect.

Keywords: CO 2; CH 4; and N 2 O fluxes; permafrost; forest soil; global warming potential; Q 10 (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 (2)

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