Decoupling of urban CO 2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown
TLDR
In this article, an integrated observational analysis based on long-term in-situ multispecies eddy flux measurements, allowing for quantifying near-real-time changes of urban surface emissions for key air quality and climate tracers.Abstract:
. Lockdown and the associated massive reduction in people's mobility imposed by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) mitigation measures across the globe provide a unique sensitivity experiment to investigate impacts on carbon and air pollution emissions. We present an integrated observational analysis based on long-term in situ multispecies eddy flux measurements, allowing for quantifying near-real-time changes of urban surface emissions for key air quality and climate tracers. During the first European SARS-CoV-2 wave we find that the emission reduction of classic air pollutants decoupled from CO2 and was significantly larger. These differences can only be rationalized by the different nature of urban combustion sources and point towards a systematic bias of extrapolated urban NOx emissions in state-of-the-art emission models. The analysis suggests that European policies, shifting residential, public, and commercial energy demand towards cleaner combustion, have helped to improve air quality more than expected and that the urban NOx flux remains to be dominated (e.g., >90 % ) by traffic.read more
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Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change.
Joshua L. Laughner,Jessica L. Neu,David S. Schimel,Paul O. Wennberg,Kelley C. Barsanti,Kevin W. Bowman,Abhishek Chatterjee,Abhishek Chatterjee,Bart E Croes,Bart E Croes,Helen Fitzmaurice,Daven K. Henze,Jinsol Kim,Eric A. Kort,Zhu Liu,Kazuyuki Miyazaki,Alexander J. Turner,Alexander J. Turner,Alexander J. Turner,Susan C. Anenberg,Jeremy Avise,Hansen Cao,David Crisp,Joost A. de Gouw,Annmarie Eldering,John C. Fyfe,Daniel L. Goldberg,Kevin R. Gurney,Sina Hasheminassab,Francesca M. Hopkins,Cesunica E. Ivey,Dylan B. A. Jones,Junjie Liu,Nicole S. Lovenduski,Randall V. Martin,Galen A. McKinley,Lesley Ott,Benjamin Poulter,Muye Ru,Muye Ru,Stanley P. Sander,Neil C. Swart,Yuk L. Yung,Zhao-Cheng Zeng +43 more
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A Simple Two-dimensional Parameterisation for Flux Footprint Predictions
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Increased ozone pollution alongside reduced nitrogen dioxide concentrations during Vienna's first COVID-19 lockdown: Significance for air quality management.
TL;DR: In this article, the authors examined the impact of Vienna's first lockdown on ground-level concentrations of nitrogen dioxide (NO2), ozone (O3) and total oxidant (Ox).
Journal ArticleDOI
Impact of Singapore's COVID-19 confinement on atmospheric CO2 fluxes at neighborhood scale
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Journal ArticleDOI
Tall tower eddy covariance measurements of CO2 fluxes in Vienna, Austria
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TL;DR: In this paper , the A1 Arsenal radio tower was used to measure turbulent CO2 flux at 144 m above the city of Vienna, Austria using an eddy covariance system.
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