SwePub
Sök i LIBRIS databas

  Utökad sökning

WFRF:(Rönkkö Topi)
 

Sökning: WFRF:(Rönkkö Topi) > Sensitivity of spat...

  • Kurppa, MonaUniversity of Helsinki (författare)

Sensitivity of spatial aerosol particle distributions to the boundary conditions in the PALM model system 6.0

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • 2020-11-18
  • Copernicus GmbH,2020
  • 23 s.

Nummerbeteckningar

  • LIBRIS-ID:oai:lup.lub.lu.se:2cf4d61d-e3cf-4fa6-a734-4f84202f2712
  • https://lup.lub.lu.se/record/2cf4d61d-e3cf-4fa6-a734-4f84202f2712URI
  • https://doi.org/10.5194/gmd-13-5663-2020DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:art swepub-publicationtype
  • Ämneskategori:ref swepub-contenttype

Anmärkningar

  • High-resolution modelling is needed to understand urban air quality and pollutant dispersion in detail. Recently, the PALM model system 6.0, which is based on large-eddy simulation (LES), was extended with the detailed Sectional Aerosol module for Large Scale Applications (SALSA) v2.0 to enable studying the complex interactions between the turbulent flow field and aerosol dynamic processes. This study represents an extensive evaluation of the modelling system against the horizontal and vertical distributions of aerosol particles measured using a mobile laboratory and a drone in an urban neighbourhood in Helsinki, Finland. Specific emphasis is on the model sensitivity of aerosol particle concentrations, size distributions and chemical compositions to boundary conditions of meteorological variables and aerosol background concentrations. The meteorological boundary conditions are taken from both a numerical weather prediction model and observations, which occasionally differ strongly. Yet, the model shows good agreement with measurements (fractional bias < 0.67, normalised mean squared error < 6, fraction of the data within a factor of 2 > 0.3, normalised mean bias factor < 0.25 and normalised mean absolute error factor < 0.35) with respect to both horizontal and vertical distribution of aerosol particles, their size distribution and chemical composition. The horizontal distribution is most sensitive to the wind speed and atmospheric stratification, and vertical distribution to the wind direction. The aerosol number size distribution is mainly governed by the flow field along the main street with high traffic rates and in its surroundings by the background concentrations. The results emphasise the importance of correct meteorological and aerosol background boundary conditions, in addition to accurate emission estimates and detailed model physics, in quantitative high-resolution air pollution modelling and future urban LES studies.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Roldin, PontusLund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Environmental and Climate Science (CEC),Faculty of Science,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)nucl-pur (författare)
  • Strömberg, JaniUniversity of Helsinki (författare)
  • Balling, AnnaUniversity of Helsinki (författare)
  • Karttunen, SasuUniversity of Helsinki (författare)
  • Kuuluvainen, HeinoUniversity of Tampere (författare)
  • Niemi, Jarkko V.Helsinki Region Environmental Services Authority (HSY) (författare)
  • Pirjola, LiisaMetropolia University of Applied Sciences (författare)
  • Rönkkö, TopiUniversity of Tampere (författare)
  • Timonen, HilkkaFinnish Meteorological Institute (författare)
  • Hellsten, AnttiFinnish Meteorological Institute (författare)
  • Järvi, LeenaUniversity of Helsinki (författare)
  • University of HelsinkiMERGE: ModElling the Regional and Global Earth system (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Geoscientific Model Development: Copernicus GmbH13:11, s. 5663-56851991-959X1991-9603

Internetlänk

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy