Attributing Global Land Carbon Loss to Regional Agricultural and Forestry Commodity Consumption,Environmental Science & Technology

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Attributing Global Land Carbon Loss to Regional Agricultural and Forestry Commodity Consumption
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-12-31 , DOI: 10.1021/acs.est.0c04222
Xue Yang ₁ , Minghong Tan ₂

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One of the critical components in climate change mitigation lies in meeting the challenge of reducing global land carbon loss, as human demand increases. Yet, it is unclear which region and which form of commodity consumption were responsible for the greatest loss of land carbon. Here we assumed a uniform lifespan (20-year) for managed land and took the managed land in 2010 as a reference to estimate the land carbon loss for region-commodity on a global scale. The estimates and multi-region input-output table were then combined to identify the regions and commodities that contributed the most to global land carbon loss from the consumption side. The results show that during the lifespan, global consumption for agricultural and forestry commodities excluding wood fuel lost a total of 15.6 Pg in land carbon annually, of which 29% and 25% were attributed to beef and wood consumption, respectively. Land carbon loss per capita consumption was highest in high-income regions (Australia, the United States, Canada, Japan, and Europe) primarily due to the high consumed quantity for commodities per capita in these areas. Further, the net importers for land carbon were usually high-income regions (they held lower land carbon loss per unit of production), which was not conducive to reducing global land carbon loss. The research could contribute to discussions of climate responsibility and then inform climate mitigation policies.

中文翻译：

将全球土地碳损失归因于区域农业和林业商品消费

缓解气候变化的关键要素之一是应对随着人类需求的增加而减少全球土地碳损失的挑战。但是，尚不清楚哪个地区和哪种商品消费造成最大的土地碳损失。在这里，我们假设受管理土地的使用寿命是统一的（20年），并以2010年受管理土地作为参考来估算全球范围内区域商品的土地碳损失。然后将估算值和多区域投入产出表结合起来，确定从消费方面对全球土地碳损失影响最大的区域和商品。结果表明，在整个生命周期中，不包括木材燃料在内的全球农林产品消费每年总共损失15.6 Pg土地碳，其中29％和25％分别归因于牛肉和木材的消费。人均消费的土地碳损失在高收入地区（澳大利亚，美国，加拿大，日本和欧洲）最高，这主要是因为这些地区人均商品的消费量很高。此外，土地碳净进口国通常是高收入地区（它们每单位生产的土地碳损失较低），这不利于减少全球土地碳损失。该研究可能有助于讨论气候责任，然后为缓解气候变化政策提供依据。和欧洲），主要原因是这些地区人均商品消费量很高。此外，土地碳净进口国通常是高收入地区（它们每单位生产的土地碳损失较低），这不利于减少全球土地碳损失。该研究可能有助于讨论气候责任，然后为缓解气候变化政策提供依据。和欧洲），主要原因是这些地区人均商品消费量很高。此外，土地碳净进口国通常是高收入地区（它们每单位生产的土地碳损失较低），这不利于减少全球土地碳损失。该研究可能有助于讨论气候责任，然后为缓解气候变化政策提供依据。

更新日期：2021-01-19

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