气候变化领域集成服务门户(CCPortal): Uncertainties in up-scaling N2O flux from field to 1 degrees X 1 degrees scale: A case study for Inner Mongolian grasslands in China

CCPortal

DOI	10.1016/j.soilbio.2005.06.014
	Uncertainties in up-scaling N2O flux from field to 1 degrees X 1 degrees scale: A case study for Inner Mongolian grasslands in China
	Xu-Ri; Niu, HS; Lid, CS; Wang, YS; Wang, MX
发表日期	2006
ISSN	0038-0717
EISSN	1879-3428
起始页码	633
结束页码	643
卷号	38 期号:4
英文摘要	Since N2O emissions cannot be measured easily at large scales, global emission estimates inevitably involve problems with scaling. To date, up-scaling processes depend highly on the models and database. Because of the limitation in resolution of the databases, which provide input parameters to drive the model's regional simulations, the uncertainties generated from the up-scaling processes must be quantified. In this paper, the uncertainties in up-scaling N2O emissions from the field scale (similar to 1 km(2)) to 1 degrees X 1 degrees scale (similar to 10,000 km(2)) were quantified in a case study from the Xilin River basin of Inner Mongolia, China. A revised process-based DNDC model was applied in the study for quantifying N2O fluxes with a high-resolution (1 km(2)) soil database constructed with remote sensing data and GIS technique. The results showed that the uncertainties coming from spatial scaling effect is 63.6%, and from the partitioning of sensitive model parameter (SOC) is 86.4%. We found that inclusion of spatial heterogeneity of soil factors resulted in lower regional N2O emission estimates. Utilization of the spatial structural information based on soil type was more effective for reducing the spatial scaling effect in comparison with the variability information calculated from Monte Carlo method. (c) 2005 Elsevier Ltd. All rights reserved.
关键词	TRACE GAS EMISSIONS MODEL EVOLUTION CARBON SOILS N-2 NO
英文关键词	uncertainty; N2O emission; up-scaling; spatial heterogeneity; DNDC; Monte Carlo method; semi-arid grassland
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000237051600001
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257450
推荐引用方式 GB/T 7714	Xu-Ri,Niu, HS,Lid, CS,et al. Uncertainties in up-scaling N2O flux from field to 1 degrees X 1 degrees scale: A case study for Inner Mongolian grasslands in China[J]. 中国科学院青藏高原研究所,2006,38(4).
APA	Xu-Ri,Niu, HS,Lid, CS,Wang, YS,&Wang, MX.(2006).Uncertainties in up-scaling N2O flux from field to 1 degrees X 1 degrees scale: A case study for Inner Mongolian grasslands in China.SOIL BIOLOGY & BIOCHEMISTRY,38(4).
MLA	Xu-Ri,et al."Uncertainties in up-scaling N2O flux from field to 1 degrees X 1 degrees scale: A case study for Inner Mongolian grasslands in China".SOIL BIOLOGY & BIOCHEMISTRY 38.4(2006).