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A Novel Method for Estimating Emissions Reductions Caused by the Restriction of Mobility: The Case of the COVID-19 Pandemic
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2020-11-11 , DOI: 10.1021/acs.estlett.0c00764
Francesco Pomponi 1 , Mengyu Li 2 , Ya-Yen Sun 3 , Arunima Malik 2, 4 , Manfred Lenzen 2 , Grigorios Fountas 5 , Bernardino D'Amico 1 , Ortzi Akizu-Gardoki 6 , Maria Luque Anguita 7
Affiliation  

The COVID-19 pandemic is the single largest event in contemporary history in terms of the global restriction of mobility, with the majority of the world population experiencing various forms of “lockdown”. This phenomenon incurred increased amounts of teleworking and time spent at home, fewer trips to shops, closure of retail outlets selling non-essential goods, and the near disappearance of leisure and recreational activities. This paper presents a novel method for an economy-wide estimate of the emissions reductions caused by the restriction of movement. Using a global multiregional macro-economic model complemented by Google Community Mobility Reports (CMRs) and national transport data, we cover 129 individual countries and quantify direct and indirect global emissions reductions of greenhouse gases (GHG; 1173 Mt), PM2.5 (0.23 Mt), SO2 (1.57 Mt), and NOx (3.69 Mt). A statistically significant correlation is observed between cross-country emission reductions and the stringency of mobility restriction policies. Due to the aggregated nature of the CMRs, we develop different scenarios linked to consumption, work, and lifestyle aspects. Global reductions are on the order of 1–3% (GHG), 1–2% (PM2.5), 0.5–2.8% (SO2), and 3–4% (NOx). Our results can help support crucial decision making in the post-COVID world, with quantified information about how direct and indirect consequences of mobility changes benefit the environment.

中文翻译:

一种估算因流动性限制而导致的排放减少量的新方法:以 COVID-19 大流行为例

就全球流动性限制而言,COVID-19 大流行是当代历史上最大规模的事件,世界上大多数人口都经历了各种形式的“封锁”。这种现象导致远程办公和在家时间增加、去商店的次数减少、销售非必需品的零售店关闭以及休闲和娱乐活动几乎消失。本文提出了一种新方法,用于估算由于行动限制而造成的整个经济范围内的减排量。我们使用全球多区域宏观经济模型,并辅以 Google 社区流动性报告 (CMR) 和国家交通数据,覆盖 129 个国家,并量化全球直接和间接温室气体排放量 (GHG;1173 公吨)、PM 2.5 (0.23公吨) )、SO 2 (1.57 Mt) 和 NO x (3.69 Mt)。跨国减排量与流动限制政策的严格程度之间存在统计上显着的相关性。由于 CMR 的聚合性质,我们开发了与消费、工作和生活方式方面相关的不同场景。全球减排量约为 1–3% (GHG)、1–2% (PM 2.5 )、0.5–2.8% (SO 2 ) 和 3–4% (NO x )。我们的研究结果可以帮助支持后新冠世界的关键决策,并提供有关流动性变化的直接和间接后果如何有益于环境的量化信息。
更新日期:2020-11-12
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