Recent content by wrf_alessandro

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    Error in TWOSTREAM subroutine (module_sf_noahmplsm.F)

    Hi everyone, I am running WRF4.2.2 at urban scale (1km) after having successfully completed the simulations for the parent domains D01 and D02 (15km and 5km). Unfortunately, in one of my urban domain I get a segmentation fault after 6 hours from the beginning of the simulation. Playing with...
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    Troubles, could not find trapping x locations

    Hi, I do not remember exactly what was wrong, but in my case this error was related to a missing 2D variable in the first or second time step of my input forcing. Hope it helps, Alessandro
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    Large difference between NOAH and NOAH-MP

    Dear WRF users, I am running WRF 4.2.2 to examine the impact of urbanization on surface climate; I apply ndown in a triply-nested domain to downscale ERA5 from 15 km to 1 km. I am using the corine landcover to define the different urban categories, while for the 1 km domain I use the BEP model...
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    Issue with corine land cover

    Hi Kwerner, I have been able to move forward and, after fixing a bug into the code, the model is running fine, but now I am a bit puzzled on my set-up. I am performing a simulation with one-way nesting, where on the parent domain I set sf_urban_physics=0, while in the nested domains I would...
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    Issue with corine land cover

    Hi, yes, I can plot the binary file I created with "gdal_translate -of ENVI" but then when I run geogrid the LU_INDEX is empty. I tried all the combinations into index, so I do not understand why it is not working. On the other side, I have been able to overcome this issue using...
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    Issue with corine land cover

    Hi All, I am trying to use the corine land cover in WPS, but after following the steps suggested in the user guide, the geo_em has a constant LU_INDEX and does not display any LANDUSEF. These are the steps I did to process the data: 1) Downloaded CLC from this link...
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    WRF4.3.2 crashes while writing output

    Dear Jordan, thanks for the quick reply and suggestions; I tried to add a my_iofields file removing from the history stream the variables that you suggested but the simulation always crashes, but in a different point (line 1060 module_domain.f90). These are the last lines of the standard...
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    WRF4.3.2 crashes while writing output

    Hi all, I am having some issues running WRF V4.3.2 with MOZART-MOSAIC chemistry (chem_opt = 201). The simulation starts correctly and works fine until the model attempts to write wrfout. In particular, when reaching the history_interval the simulation crashes without any message. Playing a bit...
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    WRF4.3.2 crashes while writing output

    Hi all, I am having some issues running WRF V4.3.2 with MOZART-MOSAIC chemistry (chem_opt = 201). The simulation starts correctly and works fine until the model attempts to write wrfout. In particular, when reaching the history_interval the simulation crashes without any message. Playing a bit...
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    Large precipitation bias after ndown

    Hi Ming, thanks for cross checking namelists and confirming that I can change the boundary size in ndown. By the way, the wrong precipitation was due to an issue in the script I used to produce the maps; now all works fine. Thanks again for your support, Alessandro
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    Large precipitation bias after ndown

    Hi, I am using ndown to generate boundary conditions for a finer simulation. The coarser domain generally well reproduces the reference data but the precipitation of the nested domain is heavily overestimated (please look at the attached figures). The ndown namelist and the run namelists are...
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    Large winter cold bias over Europe

    Hi Akos, thanks for the suggestion, I changed the land surface parametrization to Noah-MP setting opt_snf=4 but the bias is still there (> 6C :shock: ). I also performed some tests trying to replicate the set up used in this study (https://link.springer.com/article/10.1007/s00382-015-2529-x)...
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    Large winter cold bias over Europe

    Hi all, I'm currently running some hindcast simulations over Europe using WRF V3.8.1 driven by ERA-Interim and I have a very large cold bias (> 6C) during winter in the North Eastern part of the domain (see figure). I tried several different configurations changing the land surface scheme as...
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    Too strong wind speed

    Hi Ming, I tried to increase roughness length over ocean and this reduces the bias. Now I would modify this value locally only in a few points around the Gibraltar strait; following this post (https://forum.mmm.ucar.edu/phpBB3/viewtopic.php?f=44&t=9799) should I only change...
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    Too strong wind speed

    Hi Ming, thanks for the prompt reply and suggestions. I re-did the simulation adding topo_wind = 1 (var_sso was already in wrfinput) and unfortunately results are even worse with strong winds popping up over high elevation areas (please see attached file). Is there anything else I can do to...
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