Seasonal Changes in Urban PM2.5 Hotspots and Sources from Low-Cost Sensors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00558025" target="_blank" >RIV/86652079:_____/22:00558025 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2073-4433/13/5/694" target="_blank" >https://www.mdpi.com/2073-4433/13/5/694</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/atmos13050694" target="_blank" >10.3390/atmos13050694</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal Changes in Urban PM2.5 Hotspots and Sources from Low-Cost Sensors

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Seasonal Changes in Urban PM2.5 Hotspots and Sources from Low-Cost Sensors

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/EF16_019%2F0000797" target="_blank" >EF16_019/0000797: SustES - Adaptační strategie pro udržitelnost ekosystémových služeb a potravinové bezpečnosti v nepříznivých přírodních podmínkách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Atmosphere

ISSN

2073-4433

e-ISSN

2073-4433

Svazek periodika

13

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

694

Kód UT WoS článku

000801315300001

EID výsledku v databázi Scopus

2-s2.0-85129704741