Gutenberg Open Science: Seasonal changes in urban PM2.5 hotspots and sources from low-cost sensors

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8197

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DC Field	Value	Language
dc.contributor.author	Harr, Lorenz	-
dc.contributor.author	Sinsel, Tim	-
dc.contributor.author	Simon, Helge	-
dc.contributor.author	Esper, Jan	-
dc.date.accessioned	2022-11-02T11:28:13Z	-
dc.date.available	2022-11-02T11:28:13Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8212	-
dc.description.abstract	PM2.5 concentrations in urban areas are highly variable, both spatially and seasonally. To assess these patterns and the underlying sources, we conducted PM2.5 exposure measurements at the adult breath level (1.6 m) along three ~5 km routes in urban districts of Mainz (Germany) using portable low-cost Alphasense OPC-N3 sensors. The survey took place on five consecutive days including four runs each day (38 in total) in September 2020 and March 2021. While the between sensor accuracy was tested to be good (R2 = 0.98), the recorded PM2.5 values underestimated the official measurement station data by up to 25 µg/m3. The collected data showed no consistent PM2.5 hotspots between September and March. Whereas during the fall, the pedestrian and park areas appeared as hotspots in >60% of the runs, construction sites and a bridge with high traffic intensity stuck out in spring. We considered PM2.5/PM10 ratios to assign anthropogenic emission sources with high apportionment of PM2.5 in PM10 (>0.6), except for the parks (0.24) where fine particles likely originated from unpaved surfaces. The spatial PM2.5 apportionment in PM10 increased from September (0.56) to March (0.76) because of a pronounced cooler thermal inversion accumulating fine particles near ground. Our results showed that highly resolved low-cost measurements can help to identify PM2.5 hotspots and be used to differentiate types of particle sources via PM2.5/PM10 ratios.	en_GB
dc.description.sponsorship	Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 491381577	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	910 Geografie	de_DE
dc.subject.ddc	910 Geography and travel	en_GB
dc.title	Seasonal changes in urban PM2.5 hotspots and sources from low-cost sensors	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8197	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Atmosphere	de
jgu.journal.volume	13	de
jgu.journal.issue	5	de
jgu.pages.alternative	694	de
jgu.publisher.year	2022	-
jgu.publisher.name	MDPI	de
jgu.publisher.place	Basel	de
jgu.publisher.issn	2073-4433	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	910	de
jgu.publisher.doi	10.3390/atmos13050694	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-G

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