Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China

doi:10.1016/j.atmosenv.2010.03.030

	Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China
	Jiang, Chunming 2,3,4; Yu, Guirui 2; Fang, Huajun 2; Cao, Guangmin 1; Li, Yingnian 1
刊名	ATMOSPHERIC ENVIRONMENT
	2010-08-01
卷号	44 期号:24 页码:2920-2926
关键词	Anthropogenic Nitrogen Deposition Co2 Ch4 N2o q(10) Water-filled Pore Space Alpine Meadow Qinghai-tibetan Plateau
ISSN号	1352-2310
DOI	10.1016/j.atmosenv.2010.03.030
英文摘要	An increasing nitrogen deposition experiment (2 g N m(-2) year(-1)) was initiated in an alpine meadow on the Qinghai-Tibetan Plateau in May 2007. The greenhouse gases (GHGs), including CO2, CH4 and N2O, was observed in the growing season (from May to September) of 2008 using static chamber and gas chromatography techniques. The CO2 emission and CH4 uptake rate showed a seasonal fluctuation, reaching the maximum in the middle of July. We found soil temperature and water-filled pore space (WFPS) were the dominant factors that controlled seasonal variation of CO2 and CH4 respectively and lacks of correlation between N2O fluxes and environmental variables. The temperature sensitivity (Q(10)) of CO2 emission and CH4 uptake were relatively higher (3.79 for CO2, 3.29 for CH4) than that of warmer region ecosystems, indicating the increase of temperature in the future will exert great impacts on CO2 emission and CH4 uptake in the alpine meadow. In the entire growing season, nitrogen deposition tended to increase N2O emission, to reduce CH4 uptake and to decrease CO2 emission, and the differences caused by nitrogen deposition were all not significant (p < 0.05). However, we still found significant difference (p < 0.05) between the control and nitrogen deposition treatment at some observation dates for CH4 rather than for CO2 and N2O, implying CH4 is most susceptible in response to increased nitrogen availability among the three greenhouse gases. In addition, we found short-term nitrogen deposition treatment had very limited impacts on net global warming potential (GWP) of the three GHGs together in term of CO2-equivalents. Overall, the research suggests that longer study periods are needed to verify the cumulative effects of increasing nitrogen deposition on GHG fluxes in the alpine meadow. (C) 2010 Elsevier Ltd. All rights reserved.
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000280277700015
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121459]
专题	中国科学院沈阳应用生态研究所
通讯作者	Jiang, Chunming
作者单位	1.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Synth Res Ctr,Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China 4.Chinese Acad Sci, Inst Appl Ecol, Lab Nutrients Recycling, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Chunming,Yu, Guirui,Fang, Huajun,et al. Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China[J]. ATMOSPHERIC ENVIRONMENT,2010,44(24):2920-2926.
APA	Jiang, Chunming,Yu, Guirui,Fang, Huajun,Cao, Guangmin,&Li, Yingnian.(2010).Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China.ATMOSPHERIC ENVIRONMENT,44(24),2920-2926.
MLA	Jiang, Chunming,et al."Short-term effect of increasing nitrogen deposition on CO2, CH4 and N2O fluxes in an alpine meadow on the Qinghai-Tibetan Plateau, China".ATMOSPHERIC ENVIRONMENT 44.24(2010):2920-2926.