KIT | KIT-Bibliothek | Impressum | Datenschutz

Aerosol composition, air quality, and boundary layer dynamics in the urban background of Stuttgart in winter

Zhang, Hengheng ORCID iD icon 1; Huang, Wei; Shen, Xiaoli; Ramisetty, Ramakrishna; Song, Junwei ORCID iD icon 1; Kiseleva, Olga 2; Holst, Christopher Claus ORCID iD icon; Khan, Basit 3; Leisner, Thomas ORCID iD icon 1; Saathoff, Harald ORCID iD icon 1
1 Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)
3 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Aerosol distributions are of great relevance for air quality especially for cities like Stuttgart with limited air exchange due to its location in a basin. We collected a comprehensive set of data from remote sensing, in-situ methods including radiosondes for the urban background of downtown Stuttgart to determine the impact of boundary layer mixing processes on local air quality and to evaluate the simulation results of the high-resolution large eddy simulation (LES) model PALM-4U at 10 m grid spacing. Stagnant meteorological conditions caused accumulation of aerosols and chemical composition analysis shows that ammonium nitrate (37% ± 9%) and organic aerosol (OA, 34% ± 9%) dominated during this winter study. Case studies show that clouds during previous nights can weaken temperature inversion and accelerate boundary layer mixing after sunrise by up to 3 hours. This is important for ground-level aerosol dilution during morning rush hours. Furthermore, our observations validate results of the LES model PALM-4U in terms of boundary layer heights and aerosol mixing for 48 hours. The simulated aerosol concentrations follow the trend of our observations but are still underestimated by a factor of 4.5 ± 2.1 due to missing secondary aerosol formation processes, uncertainties of emissions and boundary conditions in the model. ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Institut für Meteorologie und Klimaforschung Atmosphärische Aerosolforschung (IMKAAF)
Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Forschungsdaten
Publikationsdatum 09.08.2024
Erstellungsdatum 04.08.2024 - 07.08.2024
Identifikator DOI: 10.35097/vbjzahy9ej4c1b69
KITopen-ID: 1000173184
HGF-Programm 12.11.12 (POF IV, LK 01) Atmospheric chemistry processes
Lizenz Creative Commons Namensnennung – Nicht kommerziell 4.0 International
Vorab online veröffentlicht am 07.08.2024
Liesmich

This is data for Aerosol composition, air quality, and boundary layer dynamics in the urban background of Stuttgart in winter

Art der Forschungsdaten Dataset
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page