Towards a 3D National Ecological Footprint Geography
Towards a 3D National Ecological Footprint Geography
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DOI：
10.1016/j.ecolmodel.2011.04.020
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发表时间：
2011-08-24
影响因子：
3.1
通讯作者：
Bastianoni, S.
中科院分区：
文献类型：
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作者：
Niccolucci, V.;Galli, A.;Bastianoni, S.
在过去的几十年里，人们提出了一些指标来指导决策者并帮助管理自然资本。这些指标之一是生态足迹，这是一种具有生物物理和热力学基础的资源核算工具。在我们最近的论文（Niccolucci et al., 2009）中，提出了三维生态足迹（(EF)-E-3D）模型，以更好地解释人类对自然资本存量和资源流动的需求之间的差异。这种(EF)-E-3D模型具有两个相关尺寸：表面积（或封装尺寸-EFsize）和高度（或封装深度-EF深度）。 EFsize 说明了人类对自然资本年收入的占用，而 EFdeep 则说明了自然资本存量的消耗和/或废物存量的积累。以 2009 年版国家足迹账户 (NFA) 为基础，分析了 EFsize 和 EFdepth 的全球趋势（从 1961 年到 2006 年）。从 1961 年到 1986 年，EF 大小翻了一番； 1986年后，它达到了等于地球生物承载力（BC）的渐近值并保持不变。相反，EF 深度一直保持在“自然深度”值，直到 1986 年，这一年全球 EF 首次超过地球的 BC。此后观察到增长趋势。还分析了每种足迹土地类型的趋势，以更好地评估较高的人类诱发压力下的土地类型。还讨论了在国民足迹账户中采用此类 (EF)-E-3D 模型的有用性。在比较任何国家对特定年份的生态资产的需求与其自身的生物承载力时，确定了四个假设案例，这些案例可以作为基于规模和深度概念的新足迹地理的基础。该 (EF)-E-3D 模型可以帮助区分自然资本流动的使用和自然资本存量的消耗，同时保持经典生态足迹公式的结构和优势。 (C) 2011 Elsevier B.V. 保留所有权利。
In the last decades several indicators have been proposed to guide decision makers and help manage natural capital. Among such indicators is the Ecological Footprint, a resource accounting tool with a biophysical and thermodynamic basis. In our recent paper (Niccolucci et al., 2009), a three dimensional Ecological Footprint ((EF)-E-3D) model was proposed to better explain the difference between human demand for natural capital stocks and resource flows. Such (EF)-E-3D model has two relevant dimensions: the surface area (or Footprint size - EFsize) and the height (or Footprint depth - EFdepth). EFsize accounts for the human appropriation of the annual income from natural capital while EFdepth accounts for the depletion of stocks of natural capital and/or the accumulation of stocks of wastes. Building on the 2009 Edition of the National Footprint Accounts (NFA), global trends (from 1961 to 2006) for both EFsize and EFdepth were analyzed. EFsize doubled from 1961 to 1986; after 1986 it reached an asymptotic value equal to the Earth's biocapacity (BC) and remained constant. Conversely, EFdepth remained constant at the "natural depth" value until 1986, the year in which global EF first exceeded Earth's BC. A growing trend was observed after that. Trends in each Footprint land type were also analyzed to better appraise the land type under the higher human induced stress. The usefulness of adopting such (EF)-E-3D model in the National Footprint Accounts was also discussed. In comparing any nation's demand for ecological assets with its own biocapacity in a given year, four hypothetical cases were identified which could serve as the basis for a new Footprint geography based on both size and depth concepts. This (EF)-E-3D model could help distinguish between the use of natural capital flows and the depletion of natural capital stocks while maintaining the structure and advantages of the classical Ecological Footprint formulation. (C) 2011 Elsevier B.V. All rights reserved.