Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming

	Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming
	Tian, Hanqin 1,2; Xu, Xiaofeng 1,2; Lu, Chaoqun 1,2; Liu, Mingliang 1,2; Ren, Wei 1,2; Chen, Guangsheng 1,2; Melillo, Jerry 3; Liu, Jiyuan 4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
	2011-05-13
卷号	116
文献子类	Article
英文摘要	China's terrestrial ecosystems have been recognized as an atmospheric CO2 sink; however, it is uncertain whether this sink can alleviate global warming given the fluxes of CH4 and N2O. In this study, we used a process-based ecosystem model driven by multiple environmental factors to examine the net warming potential resulting from net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere during 1961-2005. In the past 45 years, China's terrestrial ecosystems were found to sequestrate CO2 at a rate of 179.3 Tg C yr(-1) with a 95% confidence range of (62.0 Tg C yr(-1), 264.9 Tg C yr(-1)) while emitting CH4 and N2O at rates of 8.3 Tg C yr(-1) with a 95% confidence range of (3.3 Tg C yr(-1), 12.4 Tg C yr(-1)) and 0.6 Tg N yr(-1) with a 95% confidence range of (0.2 Tg N yr(-1), 1.1 Tg N yr(-1)), respectively. When translated into global warming potential, it is highly possible that China's terrestrial ecosystems mitigated global climate warming at a rate of 96.9 Tg CO(2)eq yr(-1) (1 Tg = 10(12) g), substantially varying from a source of 766.8 Tg CO(2)eq yr(-1) in 1997 to a sink of 705.2 Tg CO(2)eq yr(-1) in 2002. The southeast and northeast of China slightly contributed to global climate warming; while the northwest, north, and southwest of China imposed cooling effects on the climate system. Paddy land, followed by natural wetland and dry cropland, was the largest contributor to national warming potential; forest, followed by woodland and grassland, played the most significant role in alleviating climate warming. Our simulated results indicate that CH4 and N2O emissions offset approximately 84.8% of terrestrial CO2 sink in China during 1961-2005. This study suggests that the relieving effects of China's terrestrial ecosystems on climate warming through sequestering CO2 might be gradually offset by increasing N2O emission, in combination with CH4 emission.
WOS关键词	NITROUS-OXIDE EMISSIONS ; METHANE EMISSION ; TEMPORAL PATTERNS ; CARBON-DIOXIDE ; MAINLAND CHINA ; NATURAL WETLANDS ; NORTH-AMERICA ; CROP RESIDUE ; RICE PADDIES ; LAND-USE
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000290621500001
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/68059]
专题	中国科学院地理科学与资源研究所
通讯作者	Tian, Hanqin
作者单位	1.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.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Tian, Hanqin,Xu, Xiaofeng,Lu, Chaoqun,et al. Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2011,116.
APA	Tian, Hanqin.,Xu, Xiaofeng.,Lu, Chaoqun.,Liu, Mingliang.,Ren, Wei.,...&Liu, Jiyuan.(2011).Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,116.
MLA	Tian, Hanqin,et al."Net exchanges of CO2, CH4, and N2O between China's terrestrial ecosystems and the atmosphere and their contributions to global climate warming".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 116(2011).