Preprints
https://doi.org/10.5194/egusphere-2024-90
https://doi.org/10.5194/egusphere-2024-90
23 Jan 2024
 | 23 Jan 2024

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

Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff

Abstract. Aerosol distribution is of great relevance for air quality especially for the cities like Stuttgart which is located in a basin. To understand the impact of boundary layer mixing processes on local air quality and to validate the large eddy simulation (LES) model PAML-4U, we collected a comprehensive set of data from remote sensing, in-situ methods including radiosondes for the urban background of downtown Stuttgart. Stagnant meteorological conditions caused accumulation of aerosols during winter. Case studies show that clouds during previous nights can weaken temperature inversion and accelerate boundary layer mixing after sunrise. 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. This underestimation is mainly due to uncertainties of emissions and boundary conditions of the model. This paper firstly evaluates the PALM-4U model performance in simulating aerosol temporal-spatial distribution, which can help to improve the LES model and to better understand sources and sinks for air pollution as well as the role of horizontal and vertical transport.

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Journal article(s) based on this preprint

23 Sep 2024
Aerosol composition, air quality, and boundary layer dynamics in the urban background of Stuttgart in winter
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff
Atmos. Chem. Phys., 24, 10617–10637, https://doi.org/10.5194/acp-24-10617-2024,https://doi.org/10.5194/acp-24-10617-2024, 2024
Short summary
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-90', Anonymous Referee #1, 01 Mar 2024
    • AC1: 'Reply on RC1', Hengheng Zhang, 24 Jul 2024
  • RC2: 'Comment on egusphere-2024-90', I. Pérez, 13 Jun 2024
    • AC2: 'Reply on RC2', Hengheng Zhang, 24 Jul 2024

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-90', Anonymous Referee #1, 01 Mar 2024
    • AC1: 'Reply on RC1', Hengheng Zhang, 24 Jul 2024
  • RC2: 'Comment on egusphere-2024-90', I. Pérez, 13 Jun 2024
    • AC2: 'Reply on RC2', Hengheng Zhang, 24 Jul 2024

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Hengheng Zhang on behalf of the Authors (24 Jul 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (02 Aug 2024) by Andreas Petzold
RR by I. Pérez (04 Aug 2024)
ED: Publish as is (05 Aug 2024) by Andreas Petzold
AR by Hengheng Zhang on behalf of the Authors (08 Aug 2024)  Manuscript 

Journal article(s) based on this preprint

23 Sep 2024
Aerosol composition, air quality, and boundary layer dynamics in the urban background of Stuttgart in winter
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff
Atmos. Chem. Phys., 24, 10617–10637, https://doi.org/10.5194/acp-24-10617-2024,https://doi.org/10.5194/acp-24-10617-2024, 2024
Short summary
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff
Hengheng Zhang, Wei Huang, Xiaoli Shen, Ramakrishna Ramisetty, Junwei Song, Olga Kiseleva, Christopher Claus Holst, Basit Khan, Thomas Leisner, and Harald Saathoff

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Short summary
Our study unravels how stagnant winter conditions elevate aerosol levels in Stuttgart. Cloud cover at night plays a pivotal role, impacting morning air quality. Validating a key model, our findings aid accurate air quality predictions, crucial for effective pollution mitigation in urban areas.