globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.12496
论文题名:
Scale criticality in estimating ecosystem carbon dynamics
作者: Zhao S.; Liu S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期:7
起始页码: 2240
结束页码: 2251
语种: 英语
英文关键词: Carbon cycle ; Disturbance ; Geospatial extent ; Process ; Scaling ; Spatial resolution
Scopus关键词: carbon budget ; carbon cycle ; carbon sequestration ; ecosystem response ; estimation method ; global change ; power law ; probability ; spatial resolution ; United States ; carbon sequestration ; ecosystem ; geography ; theoretical model ; time ; United States ; Carbon Sequestration ; Ecosystem ; Geography ; Models, Theoretical ; Southeastern United States ; Time Factors
英文摘要: Scaling is central to ecology and Earth system sciences. However, the importance of scale (i.e. resolution and extent) for understanding carbon dynamics across scales is poorly understood and quantified. We simulated carbon dynamics under a wide range of combinations of resolution (nine spatial resolutions of 250 m, 500 m, 1 km, 2 km, 5 km, 10 km, 20 km, 50 km, and 100 km) and extent (57 geospatial extents ranging from 108 to 1 247 034 km2) in the southeastern United States to explore the existence of scale dependence of the simulated regional carbon balance. Results clearly show the existence of a critical threshold resolution for estimating carbon sequestration within a given extent and an error limit. Furthermore, an invariant power law scaling relationship was found between the critical resolution and the spatial extent as the critical resolution is proportional to An (n is a constant, and A is the extent). Scale criticality and the power law relationship might be driven by the power law probability distributions of land surface and ecological quantities including disturbances at landscape to regional scales. The current overwhelming practices without considering scale criticality might have largely contributed to difficulties in balancing carbon budgets at regional and global scales. © 2013 John Wiley & Sons Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62086
Appears in Collections:影响、适应和脆弱性

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作者单位: Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; U.S. Geological Survey (USGS), Earth Resources Observation and Science (EROS) Center, Sioux Falls, SD 57198, United States

Recommended Citation:
Zhao S.,Liu S.. Scale criticality in estimating ecosystem carbon dynamics[J]. Global Change Biology,2014-01-01,20(7)
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