Preprints
https://doi.org/10.5194/egusphere-2025-219
https://doi.org/10.5194/egusphere-2025-219
27 Mar 2025
 | 27 Mar 2025

MLUCM BEP+BEM: An offline one-dimensional Multi-Layer Urban Canopy Model based on the BEP+BEM Scheme

Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello

Abstract. The MLUCM BEP+BEM model introduces key innovations in urban microclimate modelling, combining advanced turbulent diffusion schemes with Building Effect Parameterization (BEP) and a Building Energy Model (BEM). Key features include updated turbulent length scales and eddy coefficients accounting for atmospheric stability, as well as the integration of urban vegetation, such as green areas and street trees. This model can be run offline with low computational costs, making it ideal for standalone use, coupling with climate projections, and suitable for running long-term simulations to assess the impacts of different emission scenarios on the urban environment. Validation against data from the Urban-PLUMBER project at a suburban site in Preston (Melbourne, Australia) demonstrates a highly accurate reproduction of shortwave (SWup), longwave (LWup) radiation and an accurate reproduction of sensible heat (Qh) and momentum (Qtau) fluxes, highlighting the robustness of the model in complex urban environments. Further investigations are required to understand the causes of the unsatisfactory agreement between observed and modelled latent heat flux (Qle). The versatility of the MLUCM BEP+BEM model enables its application across various climate scenarios for analysing the impact of climate change on urban overheating, energy demands, and for evaluating the effectiveness of strategies like green roofs, cool roofs, and photovoltaic panels.

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Journal article(s) based on this preprint

10 Oct 2025
MLUCM BEP + BEM: an offline one-dimensional multi-layer urban canopy model based on the BEP + BEM scheme
Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello
Geosci. Model Dev., 18, 7129–7145, https://doi.org/10.5194/gmd-18-7129-2025,https://doi.org/10.5194/gmd-18-7129-2025, 2025
Short summary
Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on egusphere-2025-219 - No compliance with the policy of the journal', Juan Antonio Añel, 08 Apr 2025
    • AC1: 'Reply on CEC1', Gianluca Pappaccogli, 09 Apr 2025
      • CEC2: 'Reply on AC1', Juan Antonio Añel, 09 Apr 2025
        • AC2: 'Reply on CEC2', Gianluca Pappaccogli, 10 Apr 2025
        • AC3: 'Reply on CEC2', Gianluca Pappaccogli, 11 Apr 2025
          • CEC3: 'Reply on AC3', Juan Antonio Añel, 14 Apr 2025
            • AC4: 'Reply on CEC3', Gianluca Pappaccogli, 14 Apr 2025
              • CEC4: 'Reply on AC4', Juan Antonio Añel, 14 Apr 2025
  • RC1: 'Comment on egusphere-2025-219', Anonymous Referee #1, 08 May 2025
    • AC5: 'Reply on RC1', Gianluca Pappaccogli, 03 Jul 2025
  • RC2: 'Comment on egusphere-2025-219', Anonymous Referee #2, 20 May 2025
    • RC3: 'Reply on RC2', Anonymous Referee #2, 20 May 2025
      • AC6: 'Reply on RC3', Gianluca Pappaccogli, 03 Jul 2025

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on egusphere-2025-219 - No compliance with the policy of the journal', Juan Antonio Añel, 08 Apr 2025
    • AC1: 'Reply on CEC1', Gianluca Pappaccogli, 09 Apr 2025
      • CEC2: 'Reply on AC1', Juan Antonio Añel, 09 Apr 2025
        • AC2: 'Reply on CEC2', Gianluca Pappaccogli, 10 Apr 2025
        • AC3: 'Reply on CEC2', Gianluca Pappaccogli, 11 Apr 2025
          • CEC3: 'Reply on AC3', Juan Antonio Añel, 14 Apr 2025
            • AC4: 'Reply on CEC3', Gianluca Pappaccogli, 14 Apr 2025
              • CEC4: 'Reply on AC4', Juan Antonio Añel, 14 Apr 2025
  • RC1: 'Comment on egusphere-2025-219', Anonymous Referee #1, 08 May 2025
    • AC5: 'Reply on RC1', Gianluca Pappaccogli, 03 Jul 2025
  • RC2: 'Comment on egusphere-2025-219', Anonymous Referee #2, 20 May 2025
    • RC3: 'Reply on RC2', Anonymous Referee #2, 20 May 2025
      • AC6: 'Reply on RC3', Gianluca Pappaccogli, 03 Jul 2025

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Gianluca Pappaccogli on behalf of the Authors (26 Jun 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (10 Jul 2025) by Patricia Lawston-Parker
RR by Anonymous Referee #1 (10 Jul 2025)
RR by Anonymous Referee #2 (21 Jul 2025)
ED: Reconsider after major revisions (29 Jul 2025) by Patricia Lawston-Parker
AR by Gianluca Pappaccogli on behalf of the Authors (08 Aug 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (28 Aug 2025) by Patricia Lawston-Parker
RR by Anonymous Referee #2 (29 Aug 2025)
ED: Publish as is (30 Aug 2025) by Patricia Lawston-Parker
AR by Gianluca Pappaccogli on behalf of the Authors (01 Sep 2025)

Journal article(s) based on this preprint

10 Oct 2025
MLUCM BEP + BEM: an offline one-dimensional multi-layer urban canopy model based on the BEP + BEM scheme
Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello
Geosci. Model Dev., 18, 7129–7145, https://doi.org/10.5194/gmd-18-7129-2025,https://doi.org/10.5194/gmd-18-7129-2025, 2025
Short summary
Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello

Data sets

MLUCM BEP+BEM: An offline one-dimensional Multi-Layer Urban Canopy Model based on the BEP+BEM Scheme Gianluca Pappaccogli https://doi.org/10.5281/zenodo.14716595

Gianluca Pappaccogli, Andrea Zonato, Alberto Martilli, Riccardo Buccolieri, and Piero Lionello

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Latest update: 13 Oct 2025
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Short summary
We present the MLUCM BEP+BEM model that bridges mesoscale and microscale phenomena within the urban canopy, capturing scale interactions and feedback. The accuracy and low computational cost of this one-dimensional model makes it ideal for offline climate projections to assess urban climate impacts under different emission scenarios. The model's features allow analyzing urban overheating, energy demands, and evaluating the efficiency of strategies like green/cool roofs, and photovoltaic panels.
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