气候变化领域集成服务门户(CCPortal): Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe

CCPortal

DOI	10.5194/acp-22-10901-2022
	Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe
	Reifenberg, Simon F.; Martin, Anna; Kohl, Matthias; Bacer, Sara; Hamryszczak, Zaneta; Tadic, Ivan; Roeder, Lenard; Crowley, Daniel J.; Fischer, Horst; Kaiser, Katharina; Schneider, Johannes; Dorich, Raphael; Crowley, John N.; Tomsche, Laura; Marsing, Andreas; Voigt, Christiane; Zahn, Andreas; Pohlker, Christopher; Holanda, Bruna A.; Kruger, Ovid; Poeschl, Ulrich; Poehlker, Mira; Joeckel, Patrick; Dorf, Marcel; Schumann, Ulrich; Williams, Jonathan; Bohn, Birger; Curtius, Joachim; Harder, Hardwig; Schlager, Hans; Lelieveld, Jos; Pozzer, Andrea
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	10901
结束页码	10917
卷号	22 期号:16 页码:17
英文摘要	Aerosols influence the Earth's energy balance directly by modifying the radiation transfer and indirectly by altering the cloud microphysics. Anthropogenic aerosol emissions dropped considerably when the global COVID-19 pandemic resulted in severe restraints on mobility, production, and public life in spring 2020. We assess the effects of these reduced emissions on direct and indirect aerosol radiative forcing over Europe, excluding contributions from contrails. We simulate the atmospheric composition with the ECHAM5/MESSy Atmospheric Chemistry (EMAC) model in a baseline (business-as-usual) and a reduced emission scenario. The model results are compared to aircraft observations from the BLUESKY aircraft campaign performed in May-June 2020 over Europe. The model agrees well with most of the observations, except for sulfur dioxide, particulate sulfate, and nitrate in the upper troposphere, likely due to a biased representation of stratospheric aerosol chemistry and missing information about volcanic eruptions. The comparison with a baseline scenario shows that the largest relative differences for tracers and aerosols are found in the upper troposphere, around the aircraft cruise altitude, due to the reduced aircraft emissions, while the largest absolute changes are present at the surface. We also find an increase in all-sky shortwave radiation of 0.21 +/- 0.05 Wm(-2) at the surface in Europe for May 2020, solely attributable to the direct aerosol effect, which is dominated by decreased aerosol scattering of sunlight, followed by reduced aerosol absorption caused by lower concentrations of inorganic and black carbon aerosols in the troposphere. A further increase in shortwave radiation from aerosol indirect effects was found to be much smaller than its variability. Impacts on ice crystal concentrations, cloud droplet number concentrations, and effective crystal radii are found to be negligible.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000844705400001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273296
作者单位	Max Planck Society; Max Planck Society; Helmholtz Association; German Aerospace Centre (DLR); Johannes Gutenberg University of Mainz; Helmholtz Association; Karlsruhe Institute of Technology; Max Planck Society; Leipzig University; Leibniz Institut fur Tropospharenforschung (TROPOS); Helmholtz Association; Research Center Julich; Goethe University Frankfurt; University of Bremen
推荐引用方式 GB/T 7714	Reifenberg, Simon F.,Martin, Anna,Kohl, Matthias,et al. Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe[J],2022,22(16):17.
APA	Reifenberg, Simon F..,Martin, Anna.,Kohl, Matthias.,Bacer, Sara.,Hamryszczak, Zaneta.,...&Pozzer, Andrea.(2022).Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(16),17.
MLA	Reifenberg, Simon F.,et al."Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.16(2022):17.