Ammonia and PM2.5 Air Pollution in Paris during the 2020 COVID Lockdown

نویسندگان

چکیده

During the COVID-19 pandemic, lockdown reduced anthropogenic emissions of NO2 in Paris. concentrations recorded 2020 were lowest they have been past 5 years. Despite these low-NO2 levels, Paris experienced PM2.5 pollution episodes, which investigated here based on multi-species and multi-platform measurements. Ammonia (NH3) measurements over Paris, derived from a mini-DOAS (differential optical absorption spectroscopy) instrument Infrared Atmospheric Sounding Interferometer (IASI) satellite, revealed simultaneous enhancements during spring episodes. Using IASI maps FLEXPART model, we show that long-range transport had statistically significant influence degradation air quality In addition, ammonium (NH4+) strongly correlated for all episodes observed springtime 2020, suggesting NH3 drove large component We found was not limiting factor formation nitrate (NH4NO3), suggest conversion ammonia to may essential driver.

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ژورنال

عنوان ژورنال: Atmosphere

سال: 2021

ISSN: ['2073-4433']

DOI: https://doi.org/10.3390/atmos12020160