Abstract
The spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands were investigated and attributed to multifactor environmental changes using the agricultural module of the Dynamic Land Ecosystem Model (DLEM), a highly integrated process-based ecosystem model. During 1980-2005 modelled results indicated that China's croplands acted as a carbon sink with an average carbon sequestration rate of 33.4 TgC yr-1 (1 Tg = 1012 g). Both the highest net CO{sub 2} uptake rate and the largest CH{sub 4} emission rate were found in southeast region of China's croplands. Of primary influences were land-cover and land-use change, atmospheric CO{sub 2} and nitrogen deposition, which accounted for 76%, 42% and 17% of the total carbon sequestration in China's croplands during the study period, respectively. The total carbon losses due to elevated ozone and climate variability/change were equivalent to 27% and 9% of the total carbon sequestration, respectively. Our further analysis indicated that nitrogen fertilizer application accounted for 60% of total national carbon uptake in cropland, whereas changes in paddy field areas mainly determined the variability of CH{sub 4} emissions. Our results suggest that improving air quality by means such as reducing ozone concentration and optimizing agronomic practices can enhance
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Ren, Wei;
Tian, Hanqin;
Xu, Xiaofeng;
Liu, Mingliang;
Lu, Chaoqun;
Chen, Guangsheng;
[1]
International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu;
Melillo, Jerry;
[2]
Reilly, John;
[3]
Liu, Jiyuan
[4]
- Ecosystem Dynamics and Global Ecology Laboratory, School of Forestry and Wildlife Sciences, Auburn Univ., Auburn (United States)
- Ecosystem Center, Marine Biological Laboratory, Woods Hole (United States)
- Joint Program on Science and Policy of Global Change, Massachusetts Inst. of Technology, Cambridge (United States)
- Inst. of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing (China)
Citation Formats
Ren, Wei, Tian, Hanqin, Xu, Xiaofeng, Liu, Mingliang, Lu, Chaoqun, Chen, Guangsheng, International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu, Melillo, Jerry, Reilly, John, and Liu, Jiyuan.
Spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands in response to multifactor environmental changes.
Sweden: N. p.,
2011.
Web.
doi:10.1111/J.1600-0889.2010.00522.X.
Ren, Wei, Tian, Hanqin, Xu, Xiaofeng, Liu, Mingliang, Lu, Chaoqun, Chen, Guangsheng, International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu, Melillo, Jerry, Reilly, John, & Liu, Jiyuan.
Spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands in response to multifactor environmental changes.
Sweden.
https://doi.org/10.1111/J.1600-0889.2010.00522.X
Ren, Wei, Tian, Hanqin, Xu, Xiaofeng, Liu, Mingliang, Lu, Chaoqun, Chen, Guangsheng, International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu, Melillo, Jerry, Reilly, John, and Liu, Jiyuan.
2011.
"Spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands in response to multifactor environmental changes."
Sweden.
https://doi.org/10.1111/J.1600-0889.2010.00522.X.
@misc{etde_1013193,
title = {Spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands in response to multifactor environmental changes}
author = {Ren, Wei, Tian, Hanqin, Xu, Xiaofeng, Liu, Mingliang, Lu, Chaoqun, Chen, Guangsheng, International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu, Melillo, Jerry, Reilly, John, and Liu, Jiyuan}
abstractNote = {The spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands were investigated and attributed to multifactor environmental changes using the agricultural module of the Dynamic Land Ecosystem Model (DLEM), a highly integrated process-based ecosystem model. During 1980-2005 modelled results indicated that China's croplands acted as a carbon sink with an average carbon sequestration rate of 33.4 TgC yr-1 (1 Tg = 1012 g). Both the highest net CO{sub 2} uptake rate and the largest CH{sub 4} emission rate were found in southeast region of China's croplands. Of primary influences were land-cover and land-use change, atmospheric CO{sub 2} and nitrogen deposition, which accounted for 76%, 42% and 17% of the total carbon sequestration in China's croplands during the study period, respectively. The total carbon losses due to elevated ozone and climate variability/change were equivalent to 27% and 9% of the total carbon sequestration, respectively. Our further analysis indicated that nitrogen fertilizer application accounted for 60% of total national carbon uptake in cropland, whereas changes in paddy field areas mainly determined the variability of CH{sub 4} emissions. Our results suggest that improving air quality by means such as reducing ozone concentration and optimizing agronomic practices can enhance carbon sequestration capacity of China's croplands}
doi = {10.1111/J.1600-0889.2010.00522.X}
journal = []
issue = {2}
volume = {63B}
place = {Sweden}
year = {2011}
month = {Apr}
}
title = {Spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands in response to multifactor environmental changes}
author = {Ren, Wei, Tian, Hanqin, Xu, Xiaofeng, Liu, Mingliang, Lu, Chaoqun, Chen, Guangsheng, International Center for Climate and Global Change Research, Auburn Univ., Auburn (United States)), e-mail: tianhan@auburn.edu, Melillo, Jerry, Reilly, John, and Liu, Jiyuan}
abstractNote = {The spatial and temporal patterns of CO{sub 2} and CH{sub 4} fluxes in China's croplands were investigated and attributed to multifactor environmental changes using the agricultural module of the Dynamic Land Ecosystem Model (DLEM), a highly integrated process-based ecosystem model. During 1980-2005 modelled results indicated that China's croplands acted as a carbon sink with an average carbon sequestration rate of 33.4 TgC yr-1 (1 Tg = 1012 g). Both the highest net CO{sub 2} uptake rate and the largest CH{sub 4} emission rate were found in southeast region of China's croplands. Of primary influences were land-cover and land-use change, atmospheric CO{sub 2} and nitrogen deposition, which accounted for 76%, 42% and 17% of the total carbon sequestration in China's croplands during the study period, respectively. The total carbon losses due to elevated ozone and climate variability/change were equivalent to 27% and 9% of the total carbon sequestration, respectively. Our further analysis indicated that nitrogen fertilizer application accounted for 60% of total national carbon uptake in cropland, whereas changes in paddy field areas mainly determined the variability of CH{sub 4} emissions. Our results suggest that improving air quality by means such as reducing ozone concentration and optimizing agronomic practices can enhance carbon sequestration capacity of China's croplands}
doi = {10.1111/J.1600-0889.2010.00522.X}
journal = []
issue = {2}
volume = {63B}
place = {Sweden}
year = {2011}
month = {Apr}
}