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

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dc.contributor.authorSun, Jia
dc.contributor.authorBath, Olaf
dc.contributor.authorBirmili, Wolfram
dc.contributor.authorHermann, Markus
dc.contributor.authorGerwig, Holger
dc.contributor.authorRies, Ludwig
dc.contributor.authorSchwerin, Andreas
dc.contributor.authorMeinhardt, Frank
dc.contributor.authorSohmer, Ralf
dc.contributor.authorWirtz, Klaus
dc.date.accessioned2024-06-16T14:06:33Z
dc.date.available2024-06-16T14:06:33Z
dc.date.issued2020
dc.description.abstractAnthropogenic emissions are a dominant contributor to air pollution. Consequently, mitigation policies have attempted to reduce anthropogenic pollution emissions in Europe since the 1990s. To evaluate the effectiveness of these mitigation policies, the German Ultrafine Aerosol Network (GUAN) was established in 2008, focusing on black carbon and sub-micrometer aerosol particles, especially ultrafine particles. In this investigation, trends of the size-resolved particle number concentrations (PNC) and the equivalent black carbon (eBC) mass concentration over a 10-year period (2009-2018) were evaluated for 16 observational sites for different environments among GUAN. The trend analysis was done for both, the full-length time series and on subsets of the time series in order to test the reliability of the results. The results show generally decreasing trends of both, the PNCs for all size ranges as well as eBC mass concentrations in all environments, except PNC in 10-30 nm at regional background and mountain sites. The annual slope of the eBC mass concentration varies between -7.7% and -1.8% per year. The slopes of the PNCs varies from -6.3% to 2.7%, -7.0% to -2.0%, and -9.5% to -1.5% per year (only significant trends) for 10-30 nm, 30-200 nm, and 200-800 nm particle diameter, respectively. The regional Mann-Kendall test yielded regional-scale trends of eBC mass concentration, N[30-200] and N[200-800] of -3.8%, -2.0% and -2.4%, respectively, indicating an overall decreasing trend for eBC mass concentration and sub-micrometer PNC (except N[10-30]) all over Germany. The most significant decrease was observed on working days and during daytime in urban areas, which implies a strong evidence of reduced anthropogenic emissions. For the seasonal trends, stronger reductions were observed in winter. Possible reasons for this reduction can be the increased average ambient temperatures and wind speed in winter, which resulted in less domestic heating and stronger dilution. In addition, decreased precipitation in summer also diminishes the decrease of the PNCs and eBC mass concentration. For the period of interest, there were no significant changes in long-range transport patterns. The most likely factors for the observed decreasing trends are declining anthropogenic emissions due to emission mitigation policies of the European Union. © Author(s) 2020en
dc.format.extent1 Onlineresource (pages 7049-7068)
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-1886
dc.identifier.urihttps://openumwelt.de/handle/123456789/4235
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleSupplement of Decreasing trends of particle number and black carbon mass concentrations at 16 observational sites in Germany from 2009 to 2018
dc.title.alternativeDecreasing trends of particle number and black carbon mass concentrations at 16 observational sites in Germany from 2009 to 2018
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleAtmospheric Chemistry and Physics Discussions
local.bibliographicCitation.originalDOI10.5194/acp-20-7049-2020-supplement
local.bibliographicCitation.volume20 (2020)
local.collectionAufsätze
local.contributor.authorId02171963
local.contributor.authorId02181734
local.contributor.authorId(DE-588)120765020
local.contributor.authorId00426666
local.identifier.catalogId02476557
local.ingest.leader08124naa a2200000uu 4500
local.jointTitleSUPPLEMENT OF DECREASING TRENDS OF PARTICLE NUMBER AND BLACK CARBON MASS CONCENTRATIONS AT 16 OBSERVATIONAL SITES IN GERMANY FROM 2009 TO 2018
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