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Sun, J.* ; Birmili, W.* ; Hermann, M.* ; Tuch, T.* ; Weinhold, K.* ; Merkel, M.* ; Rasch, F.* ; Mueller, T.* ; Schladitz, A.* ; Bastian, S.* ; Loeschau, G.* ; Cyrys, J. ; Gu, J. ; Flentje, H.* ; Briel, B.* ; Asbach, C.* ; Kaminski, H.* ; Ries, L.* ; Sohmer, R.* ; Gerwig, H.* ; Wirtz, K.* ; Meinhardt, F.* ; Schwerin, A.* ; Bath, O.* ; Ma, N.* ; Wiedensohler, A.*

Decreasing trends of particle number and black carbon mass concentrations at 16 observational sites in Germany from 2009 to 2018.

Atmos. Chem. Phys. 20, 7049-7068 (2020)
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Anthropogenic emissions are dominant contributors to air pollution. Consequently, mitigation policies have been attempted since the 1990s in Europe to reduce pollution by anthropogenic emissions. To evaluate the effectiveness of these mitigation policies, the German Ultrafine Aerosol Network (GUAN) was established in 2008, focusing on black carbon (BC) and sub-micrometre aerosol particles. In this study, long-term trends of atmospheric particle number concentrations (PNCs) and equivalent BC (eBC) mass concentration over a 10-year period (2009-2018) were determined for 16 GUAN sites ranging from roadside to high Alpine environments. Overall, statistically significant decreasing trends are found for most of these parameters and environments in Germany. The annual relative slope of eBC mass concentration varies between -13.1 % and -1.7 % per year. The slopes of the PNCs vary from -17.2 % to -1.7 %, -7.8 % to -1.1 %, and -11.1 % to -1.2 % per year for 10-30, 30-200, and 200-800 nm size ranges, respectively. The reductions in various anthropogenic emissions are found to be the dominant factors responsible for the decreasing trends of eBC mass concentration and PNCs. The diurnal and seasonal variations in the trends clearly show the effects of the mitigation policies for road transport and residential emissions. The influences of other factors such as air masses, precipitation, and temperature were also examined and found to be less important or negligible. This study proves that a combination of emission mitigation policies can effectively improve the air quality on large spatial scales. It also suggests that a long-term aerosol measurement network at multi-type sites is an efficient and necessary tool for evaluating emission mitigation policies.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Particulate Air-pollution; Aerosol Decadal Trends; Long-term Observations; Size Distributions; Central-europe; Urban Air; Variability; Pm10; Spectrometers; Absorption
Language english
Publication Year 2020
HGF-reported in Year 2020
ISSN (print) / ISBN 1680-7316
e-ISSN 1680-7324
Journal Atmospheric Chemistry and Physics
Quellenangaben Volume: 20, Issue: 11, Pages: 7049-7068 Article Number: , Supplement: ,
Publisher European Geosciences Union (EGU) ; Copernicus
Publishing Place Bahnhofsallee 1e, Gottingen, 37081, Germany
Reviewing status Peer reviewed
Institute(s) Institute of Epidemiology (EPI)
POF-Topic(s) 30202 - Environmental Health
Research field(s) Genetics and Epidemiology
PSP Element(s) G-504000-004
DOI 10.5194/acp-20-7049-2020
WOS ID WOS:000541777500002
Erfassungsdatum 2020-07-10
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