Opened 3 years ago

Closed 3 years ago

Last modified 8 months ago

#2563 closed help (answered)

root fractions

Reported by: awright Owned by: pmcguire
Component: JULES Keywords: root fractions, JULES
Cc: Platform:
UM Version:


Can I get some help with root fractions for JULES?

Change History (4)

comment:1 Changed 3 years ago by pmcguire

Hi Azin
The root fractions are governed by an exponential probability distribution for the different plant functional types, with an e-folding depth in meters (for each PFT) given by:

These are for the pft_params.nml namelist in JULES 4.4 that Pier Luigi has been using.

For documentation of pft_params for JULES 4.4 see:

You should be able to determine a root fraction for each soil layer for each PFT by using the values given above in equation 32 of Martin Best et al.'s 2009 document based upon their 2001 document:
You can also see Table 6 in that paper for the values of rootd_ft that they used.

Does this help?
Patrick McGuire?

Last edited 3 years ago by pmcguire (previous) (diff)

comment:2 Changed 3 years ago by pmcguire

  • Resolution set to answered
  • Status changed from new to closed

comment:3 Changed 8 months ago by pmcguire

  • Reporter changed from pmcguire to alright

comment:4 Changed 8 months ago by pmcguire

  • Reporter changed from alright to awright
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