Long-term trends in PM2.5 mass and particle number concentrations in urban air : The impacts of mitigation measures and extreme events due to changing climates

Show simple item record

dc.contributor.author de Jesus, Alma Lorelei
dc.contributor.author Thompson, Helen
dc.contributor.author Knibbs, Luke D.
dc.contributor.author Kowalski, Michal
dc.contributor.author Cyrys, Josef
dc.contributor.author Niemi, Jarkko V.
dc.contributor.author Kousa, Anu
dc.contributor.author Timonen, Hilkka
dc.contributor.author Luoma, Krista
dc.contributor.author Petäjä, Tuukka
dc.contributor.author Beddows, David
dc.contributor.author Harrison, Roy M.
dc.contributor.author Hopke, Philip
dc.contributor.author Morawska, Lidia
dc.date.accessioned 2021-04-04T21:49:45Z
dc.date.available 2021-12-18T03:45:19Z
dc.date.issued 2020-08
dc.identifier.citation de Jesus , A L , Thompson , H , Knibbs , L D , Kowalski , M , Cyrys , J , Niemi , J V , Kousa , A , Timonen , H , Luoma , K , Petäjä , T , Beddows , D , Harrison , R M , Hopke , P & Morawska , L 2020 , ' Long-term trends in PM2.5 mass and particle number concentrations in urban air : The impacts of mitigation measures and extreme events due to changing climates ' , Environmental Pollution , vol. 263 , 114500 . https://doi.org/10.1016/j.envpol.2020.114500
dc.identifier.other PURE: 139766912
dc.identifier.other PURE UUID: 2cfc36a5-b033-4b62-a9d7-cde27d2f255c
dc.identifier.other WOS: 000539426400104
dc.identifier.other ORCID: /0000-0001-8841-3050/work/87351206
dc.identifier.other ORCID: /0000-0002-1881-9044/work/102822747
dc.identifier.uri http://hdl.handle.net/10138/328684
dc.description.abstract Urbanisation and industrialisation led to the increase of ambient particulate matter (PM) concentration. While subsequent regulations may have resulted in the decrease of some PM matrices, the simultaneous changes in climate affecting local meteorological conditions could also have played a role. To gain an insight into this complex matter, this study investigated the long-term trends of two important matrices, the particle mass (PM2.5) and particle number concentrations (PNC), and the factors that influenced the trends. Mann-Kendall test, Sen's slope estimator, the generalised additive model, seasonal decomposition of time series by LOESS (locally estimated scatterplot smoothing) and the Buishand range test were applied. Both PM2.5 and PNC showed significant negative monotonic trends (0.03-0.6 mg m(-3).yr(-1) and 0.40-3.8 x 10(3) particles. cm(-3). yr(-1), respectively) except Brisbane (+0.1 mg m(-3). yr(-1) and +53 particles. cm(-3). yr(-1), respectively). For the period covered in this study, temperature increased (0.03-0.07 degrees C.yr(-1)) in all cities except London; precipitation decreased (0.02-1.4 mm.yr(-1)) except in Helsinki; and wind speed was reduced in Brisbane and Rochester but increased in Helsinki, London and Augsburg. At the change-points, temperature increase in cold cities influenced PNC while shifts in precipitation and wind speed affected PM2.5. Based on the LOESS trend, extreme events such as dust storms and wildfires resulting from changing climates caused a positive step-change in concentrations, particularly for PM2.5. In contrast, among the mitigation measures, controlling sulphur in fuels caused a negative step-change, especially for PNC. Policies regarding traffic and fleet management (e.g. low emission zones) that were implemented only in certain areas or in a progressive uptake (e.g. Euro emission standards), resulted to gradual reductions in concentrations. Therefore, as this study has clearly shown that PM2.5 and PNC were influenced differently by the impacts of the changing climate and by the mitigation measures, both metrics must be considered in urban air quality management. (C) 2020 Elsevier Ltd. All rights reserved. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Environmental Pollution
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject PM2.5
dc.subject Particle number concentration
dc.subject Ultrafine particles
dc.subject Mitigation
dc.subject Climate variabilities
dc.subject ARCTIC SEA-ICE
dc.subject NEW-YORK-STATE
dc.subject 116 Chemical sciences
dc.subject 114 Physical sciences
dc.title Long-term trends in PM2.5 mass and particle number concentrations in urban air : The impacts of mitigation measures and extreme events due to changing climates en
dc.type Article
dc.contributor.organization INAR Physics
dc.contributor.organization Department of Physics
dc.contributor.organization Institute for Atmospheric and Earth System Research (INAR)
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.envpol.2020.114500
dc.relation.issn 0269-7491
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

Files in this item

Total number of downloads: Loading...

Files Size Format View
DE_JESUS_Long_t ... 2.5_mass_ENV_POLLUT_R1.pdf 4.713Mb PDF View/Open

This item appears in the following Collection(s)

Show simple item record