High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020
Methane (CH<sub>4</sub>) is not only an important greenhouse gas next to carbon dioxide (CO<sub>2</sub>), but also an important chemically active gas. Under the background of climate warming, the measurement of CH<sub>4</sub> emissions from terrestrial ecosystems...
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MDPI AG
2022-11-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/12/1966 |
| _version_ | 1827641929091776512 |
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| author | Yongliang Yang Yusheng Shi |
| author_facet | Yongliang Yang Yusheng Shi |
| author_sort | Yongliang Yang |
| collection | DOAJ |
| description | Methane (CH<sub>4</sub>) is not only an important greenhouse gas next to carbon dioxide (CO<sub>2</sub>), but also an important chemically active gas. Under the background of climate warming, the measurement of CH<sub>4</sub> emissions from terrestrial ecosystems in China is not only very important for exploring the impact of climate change on the ecological environment, but also of great significance for the in-depth study of ecosystem carbon cycling. In this study, we used the Emission-Factor Approach to estimate CH<sub>4</sub> emissions from terrestrial ecosystems in China from 2010–2020 and explored the spatial distribution characteristics of CH<sub>4</sub> emissions. The estimated CH<sub>4</sub> emission inventory of terrestrial ecosystems with 0.05 spatial resolution on monthly time scale is in good agreement with the results of the latest emission inventory. It is estimated that CH<sub>4</sub> emissions from terrestrial ecosystems in China are 19.955 Tg yr<sup>−1</sup>, including 18.61% (3.713 Tg yr<sup>−1</sup>) from vegetation, 21.47% (4.285 Tg yr<sup>−1</sup>) from wetlands and 59.92% (11.957 Tg yr<sup>−1</sup>) from paddy fields, with the largest contribution from paddy fields. The regions with high CH<sub>4</sub> emissions from terrestrial ecosystems in China are mainly located in the central, eastern and southeastern regions of China, and show a decreasing trend from southeast to northwest. The CH<sub>4</sub> emission from terrestrial ecosystems in China has obvious seasonal variation characteristics, with the lowest emission in January (0.248 Tg month<sup>−1</sup>) and the highest emission in August (3.602 Tg month<sup>−1</sup>). The emissions are high in summer and autumn and low in spring and winter. CH<sub>4</sub> emissions from terrestrial ecosystems in China showed an overall upward trend from 2010–2020. |
| first_indexed | 2024-03-09T17:21:33Z |
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| id | doaj.art-de245c579d30429ab99bdc112846ee9c |
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| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T17:21:33Z |
| publishDate | 2022-11-01 |
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| series | Atmosphere |
| spelling | doaj.art-de245c579d30429ab99bdc112846ee9c2023-11-24T13:10:30ZengMDPI AGAtmosphere2073-44332022-11-011312196610.3390/atmos13121966High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020Yongliang Yang0Yusheng Shi1State Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, ChinaState Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, ChinaMethane (CH<sub>4</sub>) is not only an important greenhouse gas next to carbon dioxide (CO<sub>2</sub>), but also an important chemically active gas. Under the background of climate warming, the measurement of CH<sub>4</sub> emissions from terrestrial ecosystems in China is not only very important for exploring the impact of climate change on the ecological environment, but also of great significance for the in-depth study of ecosystem carbon cycling. In this study, we used the Emission-Factor Approach to estimate CH<sub>4</sub> emissions from terrestrial ecosystems in China from 2010–2020 and explored the spatial distribution characteristics of CH<sub>4</sub> emissions. The estimated CH<sub>4</sub> emission inventory of terrestrial ecosystems with 0.05 spatial resolution on monthly time scale is in good agreement with the results of the latest emission inventory. It is estimated that CH<sub>4</sub> emissions from terrestrial ecosystems in China are 19.955 Tg yr<sup>−1</sup>, including 18.61% (3.713 Tg yr<sup>−1</sup>) from vegetation, 21.47% (4.285 Tg yr<sup>−1</sup>) from wetlands and 59.92% (11.957 Tg yr<sup>−1</sup>) from paddy fields, with the largest contribution from paddy fields. The regions with high CH<sub>4</sub> emissions from terrestrial ecosystems in China are mainly located in the central, eastern and southeastern regions of China, and show a decreasing trend from southeast to northwest. The CH<sub>4</sub> emission from terrestrial ecosystems in China has obvious seasonal variation characteristics, with the lowest emission in January (0.248 Tg month<sup>−1</sup>) and the highest emission in August (3.602 Tg month<sup>−1</sup>). The emissions are high in summer and autumn and low in spring and winter. CH<sub>4</sub> emissions from terrestrial ecosystems in China showed an overall upward trend from 2010–2020.https://www.mdpi.com/2073-4433/13/12/1966Chinaterrestrial ecosystemCH<sub>4</sub> emission inventoryspatiotemporal variations |
| spellingShingle | Yongliang Yang Yusheng Shi High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 Atmosphere China terrestrial ecosystem CH<sub>4</sub> emission inventory spatiotemporal variations |
| title | High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 |
| title_full | High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 |
| title_fullStr | High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 |
| title_full_unstemmed | High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 |
| title_short | High Spatial and Temporal Resolution Methane Emissions Inventory from Terrestrial Ecosystems in China, 2010–2020 |
| title_sort | high spatial and temporal resolution methane emissions inventory from terrestrial ecosystems in china 2010 2020 |
| topic | China terrestrial ecosystem CH<sub>4</sub> emission inventory spatiotemporal variations |
| url | https://www.mdpi.com/2073-4433/13/12/1966 |
| work_keys_str_mv | AT yongliangyang highspatialandtemporalresolutionmethaneemissionsinventoryfromterrestrialecosystemsinchina20102020 AT yushengshi highspatialandtemporalresolutionmethaneemissionsinventoryfromterrestrialecosystemsinchina20102020 |