clm

Good day! I wanted to ask some clarifications on the CLM gridcell level outputs. I am currently running CLM4.5 coupled with a RegCM model, and I have two experiments, one using the default vegetation cover and the other being the updated 2020 cover with evident deforestation in large areas. Upon...

I would like to turn off the crop model option within the compset: I2000Clm50BgcCropGs with res f19_g16 (200km), so I did add the followings in the namelists user_nl_clm and lnd_in: use_crop = .false. AND irrigate = .false. The model run gives the following error: ERROR: Command...

I've compiled the CLM model at --res f05_g17 (50km) with --compset IHistClm50BgcCropGs. However, model run gives the following error: #### error ##### Attempting to read crop dynamic landuse data ..... (GETFIL): attempting to find local file...

Dear all, My research focuses on the climate response to land use, so I mainly modify the surface energy balance in the CLM module and view the output files from the CAM module. However, I forgot to reflect the changes in albedo in the variables ALBD and ALBI which will export to CAM. And I...

Hi, all I run a ssp simulation following the steps in forum, after build , i get the datm.streams.txt.Anomaly.Forcing* files, then i manually revised the content of datm.streams.txt.Anomaly.Fo* as follow: </variableNames> <filePath>...

Hi, all, I try to make a ssp (e.g. ssp370) simulation (2016-2060) with the anomaly_forcing setting, but the anomaly_forcing folder in ftp://ftp.cgd.ucar.edu/pub/oleson/anomaly_forcing seems not existed? Besides, i want to clarify the process of how to use anomaly_foricng setting (I use mct...

Hi all, I am designing my land-only simulations for the project where I change 'numurbl' from 3 to 10 in the land surface file. For spinup from a cold start to generate initial data, in my understanding, maybe it should start with I1850, followed by IHIST(1850-2000), and then I2000, and...

I'm trying to run CLM model. I know that a local input directory should be available and set in the config_machines.xml --> ''DIN_LOC_ROOT''. My question is that, whether or not, ''DIN_LOC_ROOT_CLMFORC'' should be also provided in the config_machines.xml, when the CLM model is build/run? If...

Hi, everyone. I'm trying to do some experiments based on the changes on the stem area index (SAI/Ls). I noticed that in the document of CLM5.0 the stem area index was described as ''Prescribed plant functional type (PFT) stem area index is derived from PFT leaf area index phenology combined with...

Hi, I really don't know where I have a problem here, I just want to run an I2000CLM50CN model, so just do some basic Settings. ./xmlchange STOP_OPTION=nyears,STOP_N=170,NTASKS=164 ./case.setup ./case.build ./case.submit However, I never see the growth of vegetation. In the result, TOTSOMC only...

Hi, everyone. I want to conduct experiments with dynamic vegetation using CESM1.0.4. The aim is to check if the vegetation type would change under the response of atmosphere and ocean. I am not familiar with the clm model, so I follow the clm userguide to realize it. First, sets...

Hi, I tried to run I2000CLM50CN composet for ten model years without making any modifications. However, when I checked the output TLAI or GPP, I found that its value was normal in the first year, but it began to decline rapidly in the second year and approached 0. I understood that this meant...

Hi， all when i was checking the surface data surfdata_0.9x1.25_hist_16pfts_Irrig_CMIP6_simyr2000_c190214.nc. it seems its res is 0.9 and 1.25, so globally its shape should be 200/288 , but when i open it in python the dimension is lat: 192, lon: 288, so the 0.9 is not the real...

Hello, guys. I want to simulate the climate of 200Ma when there was a LIP, but now I have a problem. The inputdata of BIOME4 is for LGM (temperature, precipitation, sunshine, and so on), and the PaleoToolkit Recipe tells me that we can use BIOME4 if we run a case of PETM although the timing does...

Hi, Recently I have been trying to modify some of the CLM code to see the impact on the results. I was interested in soil carbon, so I tried to deal with the decomposition of soil carbon, and I did a simple test. Created a CASE - I2000Clm50Cn first, and then I copied...

Hi, I am new to use CESM. I want to use CESM to run high resolution (0.1 degree) regional simulation using the CLM5-BGC-crop coupled with CAM in Europe. But I did not find step-by-step user guide from CESM official website. And I am not sure whether I must use variable resolution CESM. It is...

Dear all, We are trying to replace the land cover/use (LCLU) map in the CLM in 1984 and 2014, respectively, using high-resolution/accuracy LCLU derived from remotely sensed data. Then we want to run two experiments: (1) a 30-year run with 1984 LCLU data and (2) a 30-year run with 2014 LCLU...

Hello - I have a few clarifying questions regarding the CESM Last Millennium Ensemble simulations (https://doi.org/10.1175/BAMS-D-14-00233.1). 1) I have been advised in the past to look at CLM 4.0, 4.5, and 5.0 tech notes to better understand how the land use / land cover changes impact river...

Hi,all! I try to use the SpinupStability_v10.ncl to evaluate the state for Spinup model. But i got the information "fatal:No valid instance of variable TOTECOSYSC found in file list" and "fatal:["Execute.c":8637]:Execute: Error occurred at or near line 166 in file SpinupStability_v10.ncl"...

Hi,all, I want to know how to calculate the surface temperature(TSA) in CLM so that I can find the factors related to surface temperature(It's like the effect and control of wind speed and low clouds on surface temperature) I don't know where to find the code and the formulate. Any note or...