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CLM5 -bgc decomposition pool

R

renqiujie

renqiujie
New Member
Hi , I want to study soil carbon storage, my compset is 2000_DATM%GSWP3v1_CLM50%BGC_SICE_SOCN_MOSART_SGLC_SWAV , lnd_in file has 'use_century_decomp =.true. ' and 'use_cn =.true.' , which decomposition pool is used? In addition, the decomposition rate of CLM5_Params.*. NC and CLM5 technical documents is different in CLM-CN Pool and century-based Pool, which one should be referred to?

Thanks
 
erik

erik

Erik Kluzek
CSEG and Liaisons
Staff member
Based on the compset you list above, your simulation will be using the Century based Pools. That's what "use_century_decomp = .true." means use the Century based Pools, if it were .false. it would use the CLM-CN based pools. The use_cn logical refers to using Carbon and Nitrogen pools to track growth of vegetation (so both the Century based pools and CLM-CN based pools have this logical turned on). We've realized that use_cn is a confusing name, and plan to switch to something more easily understood in the future.
 
D

demibing

New Member
Hello, I want to estimate soil carbon storage, may I ask which compset should I choose? Is I1850CruClm45bgc right?

Look forward to hearing from you

Thanks a lot
 
O

oleson

Keith Oleson
CSEG and Liaisons
Staff member
C

CGL

CGL
Member
erik said:
Based on the compset you list above, your simulation will be using the Century based Pools. That's what "use_century_decomp = .true." means use the Century based Pools, if it were .false. it would use the CLM-CN based pools. The use_cn logical refers to using Carbon and Nitrogen pools to track growth of vegetation (so both the Century based pools and CLM-CN based pools have this logical turned on). We've realized that use_cn is a confusing name, and plan to switch to something more easily understood in the future.
Click to expand...
Hi! if i want to modify the soil carbon storage. what steps is I should follow ? I don't find the detail or example in CLM User's Guide.
 
C

CGL

CGL
Member
oleson said:
Soil carbon is prognostic so you can't directly modify it.
Click to expand...
I want to experiment the relationship between soil respiration rate，soil activity and soil carbon. How can i can reflect the soil respiration rate and soil activity in CLM?
 
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