Luftqualität im Corona-Lockdown - D. Loyola et al. (DLR-IMF) Neue Perspektiven der Erdbeobachtung June 15th, 2021 - Neue Perspektiven der ...
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Luftqualität im Corona-Lockdown D. Loyola et al. (DLR-IMF) Neue Perspektiven der Erdbeobachtung June 15th, 2021
Air Pollution & Mortality
Aerosols Nitrogen Dioxide Ozone
– Death toll of 7
million people
worldwide every
year caused by air
pollution
– Air pollution in
Europe lower
average life
expectancy
between
2 and 24 months
European Environmental Agency: Air Quality in Europe (EEA 2019)
Air Pollution & Dementia
2.1 million new cases of dementia and 0.6 million dementia deaths attributable to PM2.5 exposure
in the post-65 population in 2015. Economic costs of illness US$ 26 billion
Ru et al., 2021
https://doi.org/10.1029/2020GH000356
TROPOMI/S5P Tropospheric NO2 – Research Product from DLR DLR EOC News
https://www.dlr.de/eoc/en/desktopdefault.aspx/tabid-14195/24618_read-64626
March-April
Courtesy L. Song (DLR-IMF) February
This analysis contains modified Copernicus Sentinel-5 Precursor data (2018-2020) processed by DLR
Combining satellite, in-situ & models – Tropospheric NO2 in Lombardy/Italy DLR News
https://www.dlr.de/content/en/articles/news/2020/02/20200505_effect-of-the-coronavirus-on-air-quality-is-now-visible.html
– Model calculates air constituents using mean pollution emissions
1 January to 15 April and the prevailing meteorological conditions in 2020.
– Modelled simulations are subtracted from the current ground
measurements. Shutdown led to 45% reduction of NO2 pollution.
heute journal
18 May 2020
Tropospheric NO2 from 25 local ground stations over Lombarday
2013-2019
2020
15 Feb. to 15 April
Courtesy T. Erbertseder (DLR-DFD)
COVID-19 and satellite measurements
– Over 150 peer-review papers about COVID-19 and Air Quality collected in
– https://covid-aqs.fz-juelich.de/
– https://amigo.aeronomie.be/index.php/covid-19-publications/peer-reviewed
– Around 50 papers use satellite data, mainly TROPOMI.
– Less than 30% of all papers correct for meteorology effects
– Even less papers take into account long-term trends and seasonal cycles
– The following slides summarize the results from following DLR paper:
– Nitrogen dioxide decline and rebound observed by GOME-2 and TROPOMI during COVID-19 pandemic
Song Liu, Pieter Valks, Steffen Beirle, Diego G. Loyola, in press, 2021
– Properly takes into account long-term trends and seasonal cycles as well as short-term meteorological variations
(tsm-corrected NO2)
– Combines long-term tropospheric NO2 dataset from GOME-2 (morning overpass) with enhanced spatial
resolution from TROPOMI (early afternoon overpass) using the DLR retrieval algorithm
– An improved tropospheric NO2 column retrieval algorithm for TROPOMI over Europe
Liu et al., Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2021-39, 2021.
tsm-corrected tropospheric NO2 over eastern China (21°N-41°N, 110°E-122°E) and India
GOME-2 TROPOMI
Difference in tsm-corrected tropospheric NO2 over Europe and South America
Difference (%) in tsm-corrected tropospheric NO2 between 2020 and 2019
Anthropogenic NOx and surface ozone reduction induced by COVID-19
Miyazaki et al., 2021
https://advances.sciencemag.org/content/7/24/eabf7460COVID-19 and TROPOMI measurements of NO2, SO2, CO, HCHO and CHOCHO
– The following slides summarize the results from following paper:
– Air Quality Impacts of COVID-19 Lockdown Measures using high-resolution observations of multiple trace
gases from S5P/TROPOMI
Levelt, Stein Zweers, Aben, Bauwens, Borsdorff, De Smedt, Eskes, Lerot, Loyola, Romahn, Stavrakou, Theys, Van
Roozendael, Veefkind, Verhoelst, in preparation, 2021COVID-19 and TROPOMI measurements over India
– CO, HCHO & CHOCHO
dominated by natural
emissions (fires)
– HCHO & CHOCHO
reductions detected in
April 2020
TROPOMI allows to
distinguish source
sectors
– Major NO2 reductions
(42%) from cities
– Larger SO2 and NO2
reductions (28% and
24%) from power plantsYou can also read
