Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China
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 CH<sub>4</sub> and N<sub>2</sub>O emissions from pea...
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MDPI AG
2021-02-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/2/222 |
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| author | Xiaoxin Sun Hongjun Wang Changchun Song Xin Jin Curtis J. Richardson Tijiu Cai |
| author_facet | Xiaoxin Sun Hongjun Wang Changchun Song Xin Jin Curtis J. Richardson Tijiu Cai |
| author_sort | Xiaoxin Sun |
| collection | DOAJ |
| description | 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 CH<sub>4</sub> and N<sub>2</sub>O emissions from peatlands in Xiaoxing’an Mountains, Northeast China. During four growing seasons (2011–2014), in situ CH<sub>4</sub> and N<sub>2</sub>O 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 CH<sub>4</sub> emissions in the severe-thawing site were 55-fold higher than those in the no-thawing site. The seasonal variation of CH<sub>4</sub> 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 CH<sub>4</sub> 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, N<sub>2</sub>O emissions did not change with thawing. Permafrost thawing increased CH<sub>4</sub> emissions but did not impact N<sub>2</sub>O emissions in peatlands in the Xiaoxing’an Mountains. Increased CH<sub>4</sub> emissions from peatlands in this region may amplify global warming. |
| first_indexed | 2024-03-09T05:23:59Z |
| format | Article |
| id | doaj.art-1be5501a913d4f0d809e786de2927bf8 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T05:23:59Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-1be5501a913d4f0d809e786de2927bf82023-12-03T12:38:17ZengMDPI AGAtmosphere2073-44332021-02-0112222210.3390/atmos12020222Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast ChinaXiaoxin Sun0Hongjun Wang1Changchun Song2Xin Jin3Curtis J. Richardson4Tijiu Cai5Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, ChinaDuke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, NC 27708, USANortheast Institute of Geography and Agroecology, Chinese Academy of Science, Changchun 130102, ChinaKey Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, ChinaDuke University Wetland Center, Nicholas School of the Environment, Duke University, Durham, NC 27708, USAKey Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education, School of Forestry, Northeast Forestry University, Harbin 150040, ChinaPermafrost 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 CH<sub>4</sub> and N<sub>2</sub>O emissions from peatlands in Xiaoxing’an Mountains, Northeast China. During four growing seasons (2011–2014), in situ CH<sub>4</sub> and N<sub>2</sub>O 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 CH<sub>4</sub> emissions in the severe-thawing site were 55-fold higher than those in the no-thawing site. The seasonal variation of CH<sub>4</sub> 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 CH<sub>4</sub> 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, N<sub>2</sub>O emissions did not change with thawing. Permafrost thawing increased CH<sub>4</sub> emissions but did not impact N<sub>2</sub>O emissions in peatlands in the Xiaoxing’an Mountains. Increased CH<sub>4</sub> emissions from peatlands in this region may amplify global warming.https://www.mdpi.com/2073-4433/12/2/222CH<sub>4</sub> emissionN<sub>2</sub>O emissionpeatlandpermafrost thawing |
| spellingShingle | Xiaoxin Sun Hongjun Wang Changchun Song Xin Jin Curtis J. Richardson Tijiu Cai Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China Atmosphere CH<sub>4</sub> emission N<sub>2</sub>O emission peatland permafrost thawing |
| title | Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China |
| title_full | Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China |
| title_fullStr | Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China |
| title_full_unstemmed | Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China |
| title_short | Response of Methane and Nitrous Oxide Emissions from Peatlands to Permafrost Thawing in Xiaoxing’an Mountains, Northeast China |
| title_sort | response of methane and nitrous oxide emissions from peatlands to permafrost thawing in xiaoxing an mountains northeast china |
| topic | CH<sub>4</sub> emission N<sub>2</sub>O emission peatland permafrost thawing |
| url | https://www.mdpi.com/2073-4433/12/2/222 |
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