Black carbon aerosol reductions during COVID-19 confinement quantified by aircraft measurements over Europe
Black carbon aerosol reductions during COVID-19 confinement quantified by aircraft measurements over Europe
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DOI：
10.5194/acp-2021-1100
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发表时间：
2022-01
影响因子：
6.3
通讯作者：
Ovid O. Krüger;B. Holanda;S. Chowdhury;A. Pozzer;David Walter;C. Pöhlker;M. D. Andrés Hernández;J. Burrows;C. Voigt;J. Lelieveld;J. Quaas;U. Pöschl;M. Pöhlker
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作者：
Ovid O. Krüger;B. Holanda;S. Chowdhury;A. Pozzer;David Walter;C. Pöhlker;M. D. Andrés Hernández;J. Burrows;C. Voigt;J. Lelieveld;J. Quaas;U. Pöschl;M. Pöhlker
抽象的。在新冠肺炎大流行首次封锁期间，人类活动突然减少，创造了前所未有的大气条件。为了量化低对流层空气污染的变化，我们开展了蓝天飞机运动，并于2020年5月和6月测量了西欧和南欧上空黑碳(BC)气溶胶粒子的垂直剖面。我们将结果与2017年7月进行的Emerge EU运动的类似测量进行了比较，发现BC质量浓度(MBC)降低了约47%。对于BC颗粒数浓度，我们发现了类似的减少。基于EMAC化学传输模式的模拟，我们发现气象条件和飞行模式的差异约占MBC减少的7%，而40%可归因于人为排放的减少。我们的结果反映了人类活动的变化对空气质量的强烈和直接的积极影响，以及BC气溶胶作为人类世主要空气污染物和气候强迫因子的大气作用。
Abstract. The abrupt reduction in human activities during the first lockdown of the COVID-19 pandemic created unprecedented atmospheric conditions. To quantify the changes in lower tropospheric air pollution, we conducted the BLUESKY aircraft campaign and measured vertical profiles of black carbon (BC) aerosol particles over Western and Southern Europe in May and June 2020. We compared the results to similar measurements of the EMeRGe EU campaign performed in July 2017 and found that the BC mass concentrations (MBC) were reduced by about 47 %. For BC particle number concentrations, we found comparable reductions. Based on EMAC chemistry-transport model simulations, we find differences in meteorological conditions and flight patterns responsible for about 7 % of the reductions in MBC, whereas 40 % can be attributed to reduced anthropogenic emissions. Our results reflect the strong and immediate positive effect of changes in human activities on air quality and the atmospheric role of BC aerosols as a major air pollutant and climate forcing agent in the Anthropocene.