The carbon footprint of cold chain food flows in the United States

The carbon footprint of cold chain food flows in the United States
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美国冷链食品流动的碳足迹

DOI:
10.1088/2634-4505/ac676d
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发表时间:
2022
期刊:
Environmental Research: Infrastructure and Sustainability
影响因子:
--
通讯作者:
Konar, Megan
Konar, Megan
中科院分区:
--
文献类型:
--
作者:
Wang, Junren;Karakoc, Deniz Berfin;Konar, Megan

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食物系统是二氧化碳排放的重要贡献者。冷藏食品供应链是食品系统中能源密集、营养丰富和高价值的一部分,因此特别需要考虑。在这项研究中,我们开发了一种新的模型,在美国县之间的冷链食品流。具体而言,我们估计了2017年通过公路运输“肉类”和“预制食品”的卡车运输量。我们使用的道路行驶距离在我们的模型框架,而不是两个位置之间的大圆距离,以提高估计的长途货运与温度控制系统。这使我们能够更准确地计算与冷链食品运输相关的卡车燃料消耗和二氧化碳排放。我们发现,“肉类”的冷链运输排放了8.4x10^6吨二氧化碳年-1和“预制食品”排放了14.5x10^6吨二氧化碳年-1,这与其他研究一致。“肉类”的平均冷藏运输距离较长,导致每公斤运输二氧化碳排放量高于加工食品。我们还发现,在2045年气候变化预计发生的温度下,冷链食品运输的二氧化碳排放量预计不会显著增加。这些县级冷链食品流可用于为基础设施投资、供应链决策和环境足迹研究提供信息。
The food system is an important contributor to carbon dioxide emissions. The refrigerated food supply chain is an energy-intensive, nutritious, and high-value part of the food system, making it particularly important to consider. In this study, we develop a novel model of cold chain food flows between counties in the United States. Specifically, we estimate the truck transport via roadways of `meat' and `prepared foodstuffs' for the year 2017. We use the roadway travel distance in our model framework rather than the great-circle distance between two locations to improve the estimate of the long-haul freight with temperature controlled system. This enables us to more accurately calculate the truck fuel consumption and CO2 emissions related to cold chain food transport. We find that the cold chain transport of `meat' emitted 8.4x10^6 T CO2 yr-1 and `prepared foodstuffs' emitted 14.5x10^6 T CO2 yr-1, which is in line with other studies. `Meat' has a longer average refrigerated transport distance, resulting in higher transport CO2 emissions per kg than processed foodstuffs. We also find that CO2 emissions from cold chain food transport are not projected to significantly increase under the temperatures projected to occur with climate change in 2045. These county-level cold chain food flows could be used to inform infrastructure investment, supply chain decision making, and environmental footprint studies.
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