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URBPARM_LCZ.TBL parameters for New York City

T

Tarmactuna

New member
Hello WRF Community,

I am using the MLUCM (sf_urban_physics=2) to simulate the urban climate of New York City. For this, I must modify the urban morphology parameters in the URBPARM_LCZ.TBL file. Unfortunately, I have found very little documentation on how to do this. I need some help with this. Where could I find information or the procedure to generate these urban geometry parameters for NYC for the URBPARM_LCZ.TBL file?

Thanks for the help!
 
Last edited:
Hi,
I am not an expert on LCZ and its urban morphology parameters. I found that the following papers provide abundant information regarding LCZ. Would you please take a look? Hope they are helpful for you.
  • Stewart ID, Oke TR. Local Climate Zones for Urban Temperature Studies. Bull Am Meteorol Soc. 2012;93(12):1879-1900. doi:10.1175/BAMS-D-11-00019.1
  • Stewart ID, Oke TR, Krayenhoff ES. Evaluation of the ‘local climate zone’ scheme using temperature observations and model simulations. Int J Climatol. 2014;34(4):1062-1080. doi:10.1002/joc.3746
  • Varentsov M, Samsonov T, Demuzere M. Impact of Urban Canopy Parameters on a Megacity’s Modelled Thermal Environment. Atmosphere (Basel). 2020;11(12):1349. doi:10.3390/atmos11121349
 
Hello again Mr. Chen,

Thanks again for all the help!

I am an undergraduate student working on modeling NYC's urban climate using the MLUCM (sf_urban_physics=2). I have incorporated the 100-m LCZ information into my simulation and modified the URBPARM_LCZ.TBL parameters according to NYC's urban geometry. However, after running the simulation, I have not obtained satisfactory results. For example, I cannot distinguish spatial features such as Central Park, and the water bodies are not uniformly cooler than the land. I have attached a file with some snippets of the maps I produced for reference.

I am seeking help and guidance on this matter. Is there anything I might be doing wrong or anything I should modify to get better results? For example, should I consider adding a fourth domain for finer resolution, using better resolution data, or analyzing a longer period of time to let the simulation stabilize before producing accurate results?

For reference, I am also attaching my namelist.wps, namelist.input, and URBPARM_LCZ.TBL files.

Any feedback would be greatly appreciated. Thanks for your help!
 

Attachments

  • MLUCM.pdf
    1.3 MB · Views: 6
  • namelist.input
    4 KB · Views: 3
  • namelist.wps
    1.2 KB · Views: 2
  • URBPARM_LCZ.TBL.txt
    15.8 KB · Views: 9
Hi Tarmactuna,

Were you able to obtain the urban morphology data for the URBPARM_LCZ.TBL file? If so, could you share how? I'm working on a city for which I don't have this data. Is there any way to get it, or should I use the default parameters in the file?

Thanks for your help!

Best regards,
Sushmita
 
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