CLM5 DATM_MODE for point simulation

[mk_pdf]

Hello !!!
I am using CLM5.0 and working on point simulation. I have done point simulation for GSWP3v1 for the year 2009. Now, I would like to execute point simulation on NLDAS2 forcing dataset for the year 2017.
Because run_scripts.xml file contain following valid DATM_MODE
"CORE2_NYF,CORE2_IAF,CLM_QIAN,CLM_QIAN_WISO,CLM1PT,CLMCRUNCEP,CLMCRUNCEPv7,CLMGSWP3v1,CPLHIST,CORE_IAF_JRA,CORE_IAF_JRA_1p4_2018".
How can I can change DATM_MODE in run script xml file ?

Any suggestions ?

Thank You

 

[oleson]

It looks like support for NLDAS2 came in with the ctsm1.0.dev038 tag as part of the NWP configuration for CLM. You could either use that tag directly or use that tag to create a case that you could then use as an example of how to implement the NLDAS2 forcing in your own CLM5 simulation.

 

[mk_pdf]

Dear Professor
I have done CLM5 point simulation for satellite phenology, carbon nitrogen, bgccrop and bgcdvcrop. The point simulation surface data for SP and CN prepared from surfdata_0.9x1.25_hist_16pfts_Irrig_CMIP6_simyr2000_c190214 which is available at https://svn-ccsm-inputdata.cgd.ucar.edu/trunk/inputdata/lnd/clm2/surfdata_map/release-clm5.0.18/. Similarly, the point simulation for BgcCrop and BgcDVcrop, the surface data prepared from surfdata_0.9x1.25_hist_78pfts_CMIP6_simyr2000_c190214.nc.
Three simulations of SP, Cn and BgcCrop shows better results. However, BgcDVCrop simulation gives zero values for few output variables (ELAI, ESAI, FCEV, etc). The output graphs are attached below.

I am not getting, which input parameter variable are missing in surface data file. Any suggestions for improvement of bgcdvcrop simulation.
Which surface data file is suitable for I2000Clm50BgcDVCrop simulation. ?

 

[oleson]

Unfortunately, the DV (dynamic vegetation) model is not supported as part of CLM5. One possible substitution is FATES. See the following for a description of FATES:

2.28. Dynamic Global Vegetation — ctsm release-clm5.0 documentation

GitHub - NGEET/fates: repository for the Functionally Assembled Terrestrial Ecosystem Simulator (FATES)

repository for the Functionally Assembled Terrestrial Ecosystem Simulator (FATES) - NGEET/fates

github.com

 

[mk_pdf]

Thank You Sir

 

[mk_pdf]

Hello sir !!
I have done BGC-Crop (I2000Clm50BgcCrop) point simulation with CLM5.0 for the year 2017. I also done DGVM simulation for the same year using CLM4.5 (I2000Clm45BgcDVCrop). The point simulation for BgcCrop and BgcDVcrop, the surface data prepared from surfdata_0.9x1.25_hist_78pfts_CMIP6_simyr2000_c190214.nc.
The output variables FCEV(Canopy evaportaion) for dgvm with clm45 shows lesser value than bgc-crop clm5.0. Further, the GPP for dgvm has zero value for initial 6 months as compared to bgc-crop. Please see the attachment.
Any suggestion for getting correct results of dgvm simulation. How can we confirm the correct output of dgvm simulation.?

 

[oleson]

We don't have any DGVM expertise here in our group.
But possibly the DGVM is starting up from bare ground and won't have any GPP until conditions are conductive to vegetative growth.

 

[mk_pdf]

Thank you sir for your response.
I would like to compare my CLM simulation with observation data. I have done simulation for one of region in Indian region with lat 22.5 and lon 71.5
Any suggestion for obtaining flux obervation data for comparison of CLM point simulation results.

 

[oleson]

I suggest you take a look at some of the data collected at sites from regional flux networks. Such as for example:

FLUXNET2015 Dataset - FLUXNET

The FLUXNET2015 Dataset includes data collected at sites from multiple regional flux networks. The preparation of this FLUXNET Dataset has been possible thanks only to the efforts of many scientists and technicians around the world and the coordination among teams from regional networks. The...

fluxnet.org