MLUCM BEP+BEM: An offline one-dimensional Multi-Layer Urban Canopy Model based on the BEP+BEM scheme (CODE)
Authors/Creators
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1.
Salento University, Department of Science and Technology, Biology and Environment
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2.
CIMA Research Foundation
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3.
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Contributors
Research group (2):
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1.
Salento University, Department of Science and Technology, Biology and Environment
Description
MLUCM BEP-BEM model
These files form part of the ICSC-CN-HPC-Spoke-4-Earth-Climate project.
MLUCM BEP+BEM, incorporates the vertical turbulent diffusion scheme of Santiago and Martilli (2010) with the Building Effect Parameterization (BEP, Martilli et al., 2002) and the Building Energy Model (BEM, Salamanca et al., 2009).
MLUCM BEP+BEM bridges mesoscale and microscale phenomena within the urban canopy, capturing scale interactions and feedbacks. The accuracy and low computational cost of this 1-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 roofs, cool roofs, and photovoltaic panels
These scripts are provided to run the MLUCM BEP+BEM Offline model and input/output file generation for case study at Preston, Melborune (Australia), reported at Pappaccogli et al., [preprint]
Contents
These are fortran-90 scripts.
The following example scripts will work for any urban site:
main_program.f90: atmospheric column model that reads site geometric data and meteorological forcings
module_sf_bep_bem.f90: building effect parameterisation scheme
module_sf_bem.f90: simple building energy model
The following folders are an example test site (Melbourne, Australia) with annual data.
**/input_file/Input_2d/d_ **: text files with site characteristic information
**/input_file/Input_ERA5/w_ **: meteorological forcing data in .txt format (case study at Preston, Melbourne - Australia)
Details on how to use MLUCM BEP+BEM and any recommendations, please refer to the User Manual attached.
This work was supported by ICSC – Centro Nazionale di Ricerca in High Performance Computing, Big Data and Quantum Computing, funded by European Union – NextGenerationEU (CUP F83C22000740001).
Notes
Meteorological forcings as reported in the ERA5 from https://cds.climate.copernicus.eu/.
The details of the forcings variables are listed below:
ERA5 hourly data on single/pressure levels from 1940 to present:
w_01: U-component of wind (m s-1)
w_02: V-component of wind (m s-1)
w_03: Air temperature (K)
w_04: Surface downward long-wave radiation flux (W m-2)
w_05: Surface direct short-wave radiation flux (W m-2)
w_06: Surface downward short-wave radiation flux (W m-2)
w_07: Surface pressure (Pa)
w_08: Total precipitation (mm)
w_09: Specific humidity (kg kg-1)
w_10: Surface diffuse short-wave radiation flux (W m-2)
Urban Canopy Parameters (UCPs)
If available, the following urban morphological parameters can be used to appropriately describe the geometry of urban fabric. If not available, tabulated values may be used and defined at the beginning of the file “module_sf_bep_bem.f90”.
Geometry parameters, if defined on single column can be modified from d_*.txt files as follows:
d_01: λu - Fraction of urban land use (1) (this parameter must be 1)
d_05: longitude
d_06: latitude
d_21: λp - Roof area fraction (1)
d_22: λb - Wall to plan area ratio (m)
d_23: Hm - Building mean height (m)
hi_urb2d - Distribution of building height (m) (defined at the beginning of main_program.f90)
Ps - Pervious surface fraction (1) (defined at the beginning of module_sf_bep_bem.f90 and defined as gardens in this version)
Leave all other input files (d_z*) at zero
Files
User_Manual_MLUCM_BEP_BEM.pdf
Additional details
Software
- Programming language
- Fortran
References
- Pappaccogli, G., Zonato, A., Martilli, A., Buccolieri, R. and Lionello, P. 'MLUCM BEP+BEM: An offline one-dimensional Multi-Layer Urban Canopy Model based on the BEP+BEM Scheme', Geoscientific Model Development, EGUsphere [preprint]
- Pappaccogli, G., Zonato, A., Martilli, A., Buccolieri, R., and Lionello, P.: The Implementation of the BEP+BEM Offline Parameterization Scheme: Exploring Urban Dynamics through Climatic Projections, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-6308, https://doi.org/10.5194/egusphere-egu24-6308, 2024.
- Martilli, A., Clappier, A. and Rotach, M. W. (2002), 'An urban surface exchange parameterisation for mesoscale models', Boundary-Layer Meteorology 104(2), 261(2)304. URL: https://doi.org/10.1023/A:1016099921195
- Salamanca, F., Krpo, A., Martilli, A. and Clappier, A. (2009), 'A new building energy model coupled with an urban canopy parameterization for urban climate simulations-part I. formulation, verification, and sensitivity analysis of the model', Theoretical and Applied Climatology 99(3), 331. URL: https://doi.org/10.1007/s00704-009-0142-9
- Santiago, J. L., & Martilli, A. (2010). A Dynamic Urban Canopy Parameterization for Mesoscale Models Based on Computational Fluid Dynamics Reynolds-Averaged Navier-Stokes Simulations. Boundary-Layer Meteorology, 137(2), 231-245.