Optimal configuration for the spin-up BGC mode using flux towers

[ijaguirre]

Hi,

I am working on spinning up the Plumber 2 flux towers using the BGC mode using CLM5. I plan to spin up each tower for 300 years in AD mode, then 100 years in post-AD mode, following the transient mode.

In this sense, I am wondering about the difference between:

(a) Activate the accelerated mode (as described here, Link 1 forum, Link documentation)

./xmlchange CLM_ACCELERATED_SPINUP="on"

(b) Set the spinup_mode to 2 (as described in Link spin-up, Tech_Note)

Add to the file user_nl_clm: spinup_state=2)


In both cases, I am ensuring that:
./xmlchange CLM_FORCE_COLDSTART=on

How should I configure my simulation in terms of XML changes and modifications within the user_nl_clm to conduct AD (300 years), post-AD (100 years), and transient scenarios?

To reproduce the examples, I am using this example:


export tower=AT-Neu
./run_tower --plumber-sites $tower --output-root /glade/derecho/scratch/iaguirre/plumber2_learning/test7/$tower/ --overwrite --run-type ad --setup-only

./xmlchange STOP_OPTION=nyears
./xmlchange STOP_N=300
./xmlchange RUN_STARTDATE=2003-01-01
./xmlchange START_TOD=82800
./xmlchange DATM_YR_ALIGN=2003
./xmlchange DATM_YR_START=2003
./xmlchange DATM_YR_END=2010
./xmlchange CALENDAR=GREGORIAN
./xmlchange JOB_WALLCLOCK_TIME=06:00:00


./case.setup
./case.build
./case.submit


What version of the code are you using?
ctsm5.3.046

Describe every step you took leading up to the problem:
- Read the documentation and technical note, followed by checking the forum.


Thank you so much for the help
Warm regards,

 

[slevis]

This looks like a repeat of this active thread:

Spin-Up Issues in BGC Mode Using Plumber 2 Flux Tower Data

Hi, In the context of running the Plumber 2 flux towers using CLM5, I am trying to spin up the towers in BGC mode using AD (300 years) and post-ad (100 years). To conduct this, I am using the ./run_towers script: # Run the script to set up the tower sites export tower=AT-Neu ./run_tower...

bb.cgd.ucar.edu

 

[ijaguirre]

Hi,
Thank you for the reply.
The question is more focused on how to choose between these two options.

(a) Activate the accelerated mode (as described here, Link 1 forum, Link documentation)

./xmlchange CLM_ACCELERATED_SPINUP="on"

(b) Set the spinup_mode to 2 (as described in Link spin-up, Tech_Note)

Add to the file user_nl_clm: spinup_state=2

 

[oleson]

./xmlchange CLM_ACCELERATED_SPINUP="on" will set spinup_state=2