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The impact of COVID-19 lockdown on atmospheric CO_2 in Xi'an, China

机译：Covid-19锁定对陕西西安大气CO_2的影响

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摘要

Lockdown measures to control the spread of the novel coronavirus disease (COVID-19) sharply limited energy consumption and carbon emissions. The lockdown effect on carbon emissions has been studied by many researchers using statistical approaches. However, the lockdown effect on atmospheric carbon dioxide (CO_2) on an urban scale remains unclear. Here we present CO_2 concentration and carbon isotopic (δ~(13)C) measurements to assess the impact of COVID-19 control measures on atmospheric CO_2 in Xi'an, China. We find that CO_2 concentrations during the lockdown period were 7.5% lower than during the normal period (prior to the Spring Festival, Jan 25 to Feb 4, 2020). The observed CO_(2 excess) (total CO_2 minus background CO_2) during the lockdown period was 52.3% lower than that during the normal period, and 35.7% lower than the estimated CO_(2 excess) with the effect of weather removed. A Keeling plot shows that in contrast CO_2 concentrations and δ~(13)C were weakly correlated (R~2 = 0.18) during the lockdown period, reflecting a change in CO_2 sources imposed by the curtailment of traffic and industrial emissions. Our study also show that the sharp reduction in atmospheric CO_2 during lockdown were short-lived, and returned to normal levels within months after lockdown measures were lifted.
机译：锁定措施控制新型冠状病毒疾病（Covid-19）急剧有限有限的能耗和碳排放。许多研究人员使用统计方法研究了对碳排放的锁定效果。然而，城市规模上的大气二氧化碳（CO_2）对大气二氧化碳（CO_2）的锁定效应仍不清楚。在这里，我们呈现CO_2浓度和碳同位素（δ〜（13）c）测量，以评估Covid-19控制措施对中国西安大气CO_2的影响。我们发现锁定期间的CO_2浓度低于正常时期的7.5％（在春节之前，1月25日至2月4日，2020年）。在锁定时期的观察到的CO_（2多余）（总计CO_2减去背景CO_2）比正常时期低52.3％，比估计的CO_（2多余）降低了35.7％，并除去了天气效果。龙骨图表明，在锁定时段期间，在对比度CO_2浓度和δ〜（13）C中弱相关（R〜2 = 0.18），反映了交通和工业排放的削减所施加的CO_2源的变化。我们的研究还表明，锁定期间大气中的大气CO_2急剧下降，并在锁定措施提升后几个月内恢复到正常水平。

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  • 来源
    《Environmental research》 |2021年第2期|111208.1-111208.7|共7页
  • 作者

    Shugang Wu; Weijian Zhou; Xiaohu Xiong; G.S. Burr; Peng Cheng; Peng Wang; Zhenchuan Niu; Yaoyao Hou;

  • 作者单位

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

    State Key Laboratory of Loess and Quaternary Geology CAS Center for Excellence in Quaternary Science and Global Change Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application Joint Xi 'an AMS Center Between IEECAS and Xi'an Jiaotong University Xi'an 710061 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    COVID-19; CO_2 concentration; Carbon emissions; Lockdown; Atmospheric monitoring;

    机译：新冠肺炎;CO_2浓度;碳排放量;封锁;大气监测;

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