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Spatial and temporal patterns of CO2 and CH4 fluxes in China's croplands in response to multifactor environmental changes
Ren, Wei1,2; Tian, Hanqin1,2; Xu, Xiaofeng1,2; Liu, Mingliang1,2; Lu, Chaoqun1,2; Chen, Guangsheng1,2; Melillo, Jerry3; Reilly, John4; Liu, Jiyuan5
2011-04-01
Source PublicationTELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
Volume63Issue:2Pages:222-240
AbstractThe spatial and temporal patterns of CO2 and CH4 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 CO2 uptake rate and the largest CH4 emission rate were found in southeast region of China's croplands. Of primary influences were land-cover and land-use change, atmospheric CO2 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 CH4 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.
SubtypeReview
WOS HeadingsScience & Technology ; Physical Sciences
WOS Subject ExtendedMeteorology & Atmospheric Sciences
WOS KeywordSOIL ORGANIC-CARBON ; LAND-COVER CHANGE ; METHANE EMISSIONS ; STOMATAL CONDUCTANCE ; CLIMATE VARIABILITY ; PLANT RESPIRATION ; OZONE POLLUTION ; UNITED-STATES ; GAS EMISSIONS ; RICE PADDIES
Indexed BySCI
Language英语
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000288516400006
PublisherCO-ACTION PUBLISHING
Citation statistics
Cited Times:44[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/68080
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTian, Hanqin
Affiliation1.Auburn Univ, Sch Forestry & Wildlife Sci, Ecosyst Dynam & Global Ecol Lab, Auburn, AL 36849 USA
2.Auburn Univ, Int Ctr Climate & Global Change Res, Auburn, AL 36849 USA
3.Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
4.MIT, Joint Program Sci & Policy Global Change, Cambridge, MA 02139 USA
5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Ren, Wei,Tian, Hanqin,Xu, Xiaofeng,et al. Spatial and temporal patterns of CO2 and CH4 fluxes in China's croplands in response to multifactor environmental changes[J]. TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,2011,63(2):222-240.
APA Ren, Wei.,Tian, Hanqin.,Xu, Xiaofeng.,Liu, Mingliang.,Lu, Chaoqun.,...&Liu, Jiyuan.(2011).Spatial and temporal patterns of CO2 and CH4 fluxes in China's croplands in response to multifactor environmental changes.TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY,63(2),222-240.
MLA Ren, Wei,et al."Spatial and temporal patterns of CO2 and CH4 fluxes in China's croplands in response to multifactor environmental changes".TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY 63.2(2011):222-240.
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