Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to help@ucar.edu

CESM1.2.1 simulation with I compset, using USER CREATED surface data and atmospheric forcing for regional simulation

Hi,I am new to CESM framework. Recently, I ported the CESM1.2.1 into our local linux cluster, and I was able to run test simulation with the recommended X compset, and then later on with the "5x5_amazon" with I compset, using surface and forcing data from the https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/.Now, I am trying to run a regional simulation with CLM standalone (I compset), using my own surface data and atmospheric forcing. Everything seems to go well till the build phase, but on submitting the run, I get the following error message in the atm log file:================================================================================================================(datm_comp_init)  initialize gsmaps(datm_comp_init) copy domains(datm_comp_init) allocate AVs(datm_comp_init)  flds_strm = strm_tbot:strm_wind:strm_z:strm_pbot:strm_rh:strm_lwdn:strm_swdn:strm_precn(shr_stream_verifyTCoord) ERROR: elapsed seconds on a date must be strickly increasing(shr_stream_verifyTCoord) secs(n), secs(n+1) =  00082800 00082800(shr_sys_abort) ERROR: (shr_stream_verifyTCoord) ERROR: elapsed seconds must be increasing(shr_sys_abort) WARNING: calling shr_mpi_abort() and stopping===============================================================================================================I am assuming that the above error message is coming from reading the forcing files, I have double checked my forcing files, and they do not have the same time. The atmospheric forcing data are in hourly time-step.I am trying to do a 5 month simulation for test, and I have also changed the following parameters:./xmlchange CLM_FORCE_COLDSTART="on"         < I do not have initial data>./xmlchange CLM_CO2_TYPE="constant"./xmlchange DATM_MODE=CLM1PT                      ./xmlchange CLM_BLDNML_OPTS="-sim_year 2000" ./xmlchange DATM_CLMNCEP_YR_START="2009",DATM_CLMNCEP_YR_END="2010"./xmlchange RUN_STARTDATE="2009-01-01"  ./xmlchange RUN_REFDATE="2009-01-01"  ./xmlchange STOP_OPTION="nmonths"  ./xmlchange STOP_N="5" Looking forward for your helpful suggestion.Regards,P 
 
The problem was coming due to inconsistent surface data or grid data related to the compset, which I could solve by creating surface and domain data using the CESM tools.But, another thing I noticed was: When I use ncview to look at the domain and surface data created using the CESM tool, it looks flipped in both lat and lon, does anybody have an answer to this ?
 
Again, had to find my way through, I found that the latitude, longitude and the mask arrays are dimensioned in a different way in the ncl code:$CCSMROOT/models/lnd/clm/tools/shared/mkmapgrids/mkscripgrid.ncSwitching the dimensions of the variables to (ny,nx) instead of (nx, ny), and the corresponding loops in the above ncl code, appears to solve the issue of flipped lat/lon and surface data used created using the base SCRIP grid from "./mknoocnmap.pl"Is this a bug or there is another way ?
 
hi,prabshr!i have similar question with you.Though i can run the model successfully,but lat-lon in history file keep unchange.So do you solve the problem?looking forward for your suggestion!thank you!
 
thank you so much for your reply! what i want to express is that i found the lat-lon in   the  output history file  of I compset at region scale keep unchange(just as follow bold font) ,which may be cause by the flipped lat-lon  in the domain file. Do you run the CLM successfully at region scale and encounter the same question with me ?   lon = 114.608, 114.608, 114.608, 114.608, 114.608, 114.608, 114.608,    114.608, 114.608, 114.608 ;  lat = 26.291, 26.291, 26.291, 26.291, 26.291, 26.291, 26.291, 26.291,    26.291, 26.291 ;
 
Yes, I can run successfully for my regional domain, with user created surface and forcing dataI am attaching the ncl file that I changed ...just in case...,But I am not sure if your problem is coming from that...Best of Luck
 
Hello,I am trying to perform a regional simulation using CESM1.2.0, I compset.I am trying to use mknoocnmap.pl script for creating the SCRIP file. However, the manual and the README file only talks about its use for point simulations.So, could you give me an example of using the mknoocnmap.pl script for creating SCRIP grid files for a regional domain, e.g., over India.
Looking forward for your helpful suggestion
RegardsAniket
 
Top