<div dir="ltr"><div><br></div>Hi,<div><br></div><div>It is my understanding that the use of LES grids within normal meso scale grids is not possible as there is a global parameter (name escapes me -- 12 months of doing different stuff and I'm forgetting) set for meso scale runs which makes no sense for LES runs. That is, WRF will often run, but do the runs have any validity?</div>
<div><br></div><div>The way around this is to do all the meso runs once (with or without feedback) and save the outputs, then use ndown to prepare them as input files for an LES layer. It is possible to trick ndown into producing a 3x downscale and a 9x downscale and initiate a nested feedback LES run, but it is a painful task.</div>
<div><br></div><div style>Another benefit of doing the ndown is you can run the meso code for several hours so the system settles down, then kick off LES runs. The LES code is very sensitive to wierd stuff and will crash all the time for mountainous/steep terrain.</div>
<div><br></div><div style>I have some code written for automating the ndown nesting process, I will see if I can get work to approve a public release.</div><div style><br></div><div><div style>Regards,</div><div style>Andrew</div>
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<br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Jan 7, 2013 at 3:26 AM, Sara Fenech <span dir="ltr"><<a href="mailto:sarafenech@gmail.com" target="_blank">sarafenech@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Sara Fenech</b> <span dir="ltr"><<a href="mailto:sarafenech@gmail.com" target="_blank">sarafenech@gmail.com</a>></span><br>
Date: Thu, Jan 3, 2013 at 12:02 PM<br>Subject: Les within Les technique<br>To: <a href="mailto:wrf-users@ucar.edu" target="_blank">wrf-users@ucar.edu</a><br><br><br>Dear all<div><br></div><div>I am currently carrying out a simulation having maximum domain 5 over the Mediterranean sea and having default physics schemes. The aim of this is to implement the LES within LES technique for the last two nests. To my knowledge and in accordance with the wrf manual all options are chosen in relation with each other. However the simulation does not even initialize giving the error below. This simulation has worked out successfully for the same conditions but having no LES conditions implemented. Thanks from beforehand</div>
<div><br></div><div>Sara Fenech</div><div>4th Year Student</div><div>University of Malta</div><div><br></div><div>Error:</div><div><br></div><div><div> Namelist scm not found in namelist.input. Using registry defaults for variables</div>
<div> in scm</div><div> Namelist fire not found in namelist.input. Using registry defaults for variable</div><div> s in fire</div><div> -------------- FATAL CALLED ---------------</div><div> FATAL CALLED FROM FILE: <stdin> LINE: 8697</div>
<div> ERRORS while reading one or more namelists from namelist.input.</div><div> -------------------------------------------</div><div>taskid: 0 hostname: node019</div><div>taskid: 0 hostname: node019</div></div><div><br>
</div><div><br></div><div>Namelist:</div><div><br></div><div><div>&time_control </div><div>run_days = 2,</div><div>run_hours = 0,</div><div>run_minutes = 0,</div>
<div>run_seconds = 0,</div><div>start_year = 2011, 2011, 2011, 2011, 2011,</div><div>start_month = 12, 12, 12, 12, 12,</div><div>start_day = 25, 25, 25, 25, 25,</div>
<div>start_hour = 12, 12, 12, 12, 12,</div><div>start_minute = 00, 00, 00, 0, 0,</div><div>start_second = 00, 00, 00, 0, 0,</div>
<div>end_year = 2011, 2011, 2011, 2011, 2011,</div><div>end_month = 12, 12, 12, 12, 12,</div><div>end_day = 27, 27, 27, 27, 27,</div>
<div>end_hour = 12, 12, 12, 12, 12,</div><div>end_minute = 00, 00, 00, 0, 0,</div><div>end_second = 00, 00, 00, 0, 0,</div>
<div>interval_seconds = 21600,</div><div>input_from_file = .true., .true., .true., .true., .true.,</div><div>history_interval = 180, 60, 60, 60, 60,</div><div>frames_per_outfile = 1000, 1000, 1000, 1000, 1000,</div>
<div>restart = .false.,</div><div>restart_interval = 5000,</div><div>io_form_history = 2,</div><div>io_form_restart = 2,</div><div>io_form_input = 2,</div><div>io_form_boundary = 2,</div>
<div>debug_level = 50,</div><div>/</div><div><br></div><div>&domains </div><div>time_step = 144,</div><div>time_step_fract_num = 0,</div><div>time_step_fract_den = 1,</div>
<div>max_dom = 5,</div><div>e_we = 100, 146, 177, 178, 457,</div><div>e_sn = 100, 136, 161, 181, 433,</div><div>e_vert = 28, 28, 28, 28, 28,</div>
<div>p_top_requested = 5000,</div><div>num_metgrid_levels = 27,</div><div>num_metgrid_soil_levels = 4,</div><div>dx = 24000, 4800, 1200, 400, 100,</div><div>dy = 24000, 4800, 1200, 400, 100,</div>
<div>grid_id = 1, 2, 3, 4, 5,</div><div>parent_id = 1, 1, 2, 3, 4,</div><div>i_parent_start = 1, 36, 49, 59, 42,</div>
<div>j_parent_start = 1, 37, 48, 54, 66,</div><div>parent_grid_ratio = 1, 5, 4, 3, 4,</div><div>parent_time_step_ratio = 1, 5, 4, 3, 4,</div>
<div>feedback = 0,</div><div>smooth_option = 0,</div><div>/</div><div><br></div><div>&physics </div><div>mp_physics = 3, 3, 3, 3, 3,</div>
<div>ra_lw_physics = 1, 1, 1, 1, 1,</div><div>ra_sw_physics = 1, 1, 1, 1, 1,</div><div>radt = 30, 30, 30, 30, 30,</div>
<div>sf_sfclay_physics = 1, 1, 1, 1, 1,</div><div>sf_surface_physics = 2, 2, 2, 2, 2,</div><div>bl_pbl_physics = 1, 1, 1, 0, 0,</div>
<div>bldt = 0, 0, 0, 0, 0,</div><div>cu_physics = 1, 1, 0, 0, 0,</div><div>cudt = 5, 5, 5, 5, 5,</div>
<div>isfflx = 1, 1, 1, 1, 1,</div><div>ifsnow = 0,</div><div>icloud = 1,</div><div>surface_input_source = 1,</div><div>num_soil_layers = 4,</div>
<div>sf_urban_physics = 0, 0, 0, 0, 0,</div><div>maxiens = 1,</div><div>maxens = 3,</div><div>maxens2 = 3,</div><div>maxens3 = 16,</div>
<div>ensdim = 144,</div><div>/</div><div><br></div><div>&fdda </div><div>/</div><div><br></div><div>&dynamics </div><div>w_damping = 0,</div><div>
diff_opt = 1, 1, 1, 2, 2,</div><div>km_opt = 4, 4, 4, 3, 3,</div><div>diff_6th_opt = 0, 0, 0, 0, 0,</div>
<div>diff_6th_factor = 0.12, 0.12, 0.12, 0.12, 0.12,</div><div>base_temp = 290.,</div><div>damp_opt = 0,</div><div>zdamp = 5000., 5000., 5000., 5000., 5000.,</div>
<div>dampcoef = 0.2, 0.2, 0.2, 0.2, 0.2,</div><div>khdif = 0, 0, 0, 0, 0,</div><div>kvdif = 0, 0, 0, 0, 0,</div>
<div>non_hydrostatic = .true., .true., .true., .true., .true.,</div><div>moist_adv_opt = 1, 1, 1, 1, 1,</div><div>scalar_adv_opt = 1, 1, 1, 1, 1,</div>
<div>/</div><div><br></div><div>&bdy_control </div><div>spec_bdy_width = 5,</div><div>spec_zone = 1,</div><div>relax_zone = 4,</div><div>specified = .true., .false., .false., .false., .false.,</div>
<div>nested = .false., .true., .true., .true., .true.,</div><div>/</div><div><br></div><div>&grib2 </div><div>/</div><div><br></div><div>&namelist_quilt </div>
<div>
nio_tasks_per_group = 0,</div><div>nio_groups = 1,</div><div>/</div><div> </div>
</div><div><br></div><div><br></div><div><br></div>
</div><br>
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<br></blockquote></div><br></div>