Počet záznamů: 1
Seasonal Changes in Urban PM2.5 Hotspots and Sources from Low-Cost Sensors
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SYSNO ASEP 0558025 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Seasonal Changes in Urban PM2.5 Hotspots and Sources from Low-Cost Sensors Tvůrce(i) Harr, L. (DE)
Sinsel, T. (DE)
Simon, H. (DE)
Esper, Jan (UEK-B) SAI, ORCID, RIDCelkový počet autorů 4 Číslo článku 694 Zdroj.dok. Atmosphere. - : MDPI
Roč. 13, č. 5 (2022)Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova particulate matter pm2.5 ; ambient air ; particle number ; pollution ; exposure ; variability ; performance ; opc-n2 ; pm10 ; opc-n3 ; particulate matter ; personal exposure ; mobile measurement ; PM2.5/PM10 ratio Vědní obor RIV DG - Vědy o atmosféře, meteorologie Obor OECD Meteorology and atmospheric sciences CEP EF16_019/0000797 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CzeCOS III - 90123 - Ústav výzkumu globální změny AV ČR, v. v. i. Způsob publikování Open access Institucionální podpora UEK-B - RVO:86652079 UT WOS 000801315300001 EID SCOPUS 85129704741 DOI 10.3390/atmos13050694 Anotace PM2.5 concentrations in urban areas are highly variable, both spatially and seasonally. To assess these patterns and the underlying sources, we conducted PM 2.5 exposure measurements at the adult breath level (1.6 m) along three5 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 betweensensor accuracy was tested to be good (R-2 = 0.98), the recorded PM2.5 values underestimated the official measurement station data by up to 25 mu g/m(3). 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 PM 2.5 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. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2023 Elektronická adresa https://www.mdpi.com/2073-4433/13/5/694
Počet záznamů: 1