Dear Keith & Slevis,
I am writing this thread in continuation with the previous thread where you have explained the steps to achieve a 1850 equilibrium run for the terrestrial carbon for CLM5-BGC with and without crops.
The summary of last post on this thread, where i summarized the 3 steps to achieve a equilibrium run as step 1, running the CLM standalone for 1300 years using the "fast decomposition or accelerated CLM" then step 2, turning "off" the fast decomposition and runing for 400 years . In both of these cases, we checked for the condition where <3% of land gredcells are out of equilibrium.
In the 3rd step, we switched the atmosphere active and ran a 1850 control run using the 1850 for all the F compset specification. We ran this for ~250 years and continues. As suggested, our plan is to drop the first few decades as part of equilibrium process and rest we can use for the control run for our experiments.
You can find the thread here. (Soil Carbon spin up with crops).
I am attaching the plots for the global mean timeseries of 240 years of different carbon stocks here and also attaching the spatial plot of trends for first 100 years and last 140 years for these carbon stocks.
Could you please comment on how these runs looks to you. Is it okay to use the last 100 years as equilibrium control run? given this run is still away from satisfying the <3% gridcell criteria as per the utility you have developed. However, these values are higher trends are the regions of originally higher carbon stocks ~ 20000 gC/m^2 and seems reasonable. (please see the mean ecosystem carbon spatial plot).
Note:-
1.) On timeseries plot : "Blue" line for control without crops and "red" with crops active.
2.) On spatial plots, trend is in model native units (gC/m^2), top row for the first 100 years for nocrops and with crops run and bottom row for the latest 140 years.
Thank you very much.
-Ram
I am writing this thread in continuation with the previous thread where you have explained the steps to achieve a 1850 equilibrium run for the terrestrial carbon for CLM5-BGC with and without crops.
The summary of last post on this thread, where i summarized the 3 steps to achieve a equilibrium run as step 1, running the CLM standalone for 1300 years using the "fast decomposition or accelerated CLM" then step 2, turning "off" the fast decomposition and runing for 400 years . In both of these cases, we checked for the condition where <3% of land gredcells are out of equilibrium.
In the 3rd step, we switched the atmosphere active and ran a 1850 control run using the 1850 for all the F compset specification. We ran this for ~250 years and continues. As suggested, our plan is to drop the first few decades as part of equilibrium process and rest we can use for the control run for our experiments.
You can find the thread here. (Soil Carbon spin up with crops).
I am attaching the plots for the global mean timeseries of 240 years of different carbon stocks here and also attaching the spatial plot of trends for first 100 years and last 140 years for these carbon stocks.
Could you please comment on how these runs looks to you. Is it okay to use the last 100 years as equilibrium control run? given this run is still away from satisfying the <3% gridcell criteria as per the utility you have developed. However, these values are higher trends are the regions of originally higher carbon stocks ~ 20000 gC/m^2 and seems reasonable. (please see the mean ecosystem carbon spatial plot).
Note:-
1.) On timeseries plot : "Blue" line for control without crops and "red" with crops active.
2.) On spatial plots, trend is in model native units (gC/m^2), top row for the first 100 years for nocrops and with crops run and bottom row for the latest 140 years.
Thank you very much.
-Ram