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Article

Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China

1
Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, China
2
Heilongjiang Sanjiang Plain Wetland Ecosystem Research Station, Fuyuan 156500, China
3
Duke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, NC 27708, USA
4
Northeast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun 130102, China
*
Author to whom correspondence should be addressed.
Academic Editor: Gareth Marshall
Atmosphere 2021, 12(2), 222; https://doi.org/10.3390/atmos12020222
Received: 13 January 2021 / Revised: 30 January 2021 / Accepted: 2 February 2021 / Published: 6 February 2021
(This article belongs to the Special Issue Climate-Ecosystem Interaction in Northern Wetlands)
Permafrost thawing may lead to the release of carbon and nitrogen in high-latitude regions of the Northern Hemisphere, mainly in the form of greenhouse gases. Our research aims to reveal the effects of permafrost thawing on CH4 and N2O emissions from peatlands in Xiaoxing’an Mountains, Northeast China. During four growing seasons (2011–2014), in situ CH4 and N2O emissions were monitored from peatland under permafrost no-thawing, mild-thawing, and severe-thawing conditions in the middle of the Xiaoxing’an Mountains by a static-chamber method. Average CH4 emissions in the severe-thawing site were 55-fold higher than those in the no-thawing site. The seasonal variation of CH4 emission became more aggravated with the intensification of permafrost thawing, in which the emission peaks became larger and the absorption decreased to zero. The increased CH4 emissions were caused by the expansion of the thawing layer and the subsequent increases in soil temperature, water table, and shifts of plant communities. However, N2O emissions did not change with thawing. Permafrost thawing increased CH4 emissions but did not impact N2O emissions in peatlands in the Xiaoxing’an Mountains. Increased CH4 emissions from peatlands in this region may amplify global warming. View Full-Text
Keywords: CH4 emission; N2O emission; peatland; permafrost thawing CH4 emission; N2O emission; peatland; permafrost thawing
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MDPI and ACS Style

Sun, X.; Wang, H.; Song, C.; Jin, X.; Richardson, C.J.; Cai, T. Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China. Atmosphere 2021, 12, 222. https://doi.org/10.3390/atmos12020222

AMA Style

Sun X, Wang H, Song C, Jin X, Richardson CJ, Cai T. Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China. Atmosphere. 2021; 12(2):222. https://doi.org/10.3390/atmos12020222

Chicago/Turabian Style

Sun, Xiaoxin, Hongjun Wang, Changchun Song, Xin Jin, Curtis J. Richardson, and Tijiu Cai. 2021. "Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China" Atmosphere 12, no. 2: 222. https://doi.org/10.3390/atmos12020222

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