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Adds a new snow compaction & routing scheme in ELM #6413

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chloewhicker
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@chloewhicker chloewhicker commented May 14, 2024

Modifies the ELM snowcapping routing scheme along with the snow and firn compaction
schemes to include changes made by Schneider et al., (2022)
but retain the original 5-layer snowpack, these modifications can be turned on by
setting use_firn_percolation_and_compaction = .true. in user_nl_elm

[BFB]
[NML]


design doc here

chloewhicker and others added 26 commits May 1, 2024 14:35
…hicker/elm/use_extrasnowlayers-5lyrs/1_ERA5"

This reverts commit 3d35017ffb2388120ed0c34b7061e0abccc8c88b, reversing
changes made to b29ce48444e433697343bd60caab6262096aa2b4.

merged wrong branch
…a5' into cwhicker/elm/use_extrasnowlayers-5lyrs/1_ERA5_mastermerge
…a5' into cwhicker/elm/use_extrasnowlayers-5lyrs/1_ERA5_mastermerge
…a5' into cwhicker/elm/use_extrasnowlayers-5lyrs/1_ERA5_mastermerge
…a5' into cwhicker/elm/use_extrasnowlayers-5lyrs/1_ERA5_mastermerge_fcf5bad
…a5' into cwhicker/elm/use_extrasnowlayers-5lyrs/1_ERA5_mastermerge_fcf5bad

add GB's change "updates test to not use testmods"
@rljacob
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rljacob commented May 29, 2024

Can you fix the PR title?

@chloewhicker chloewhicker changed the title Cwhicker/elm/use firn percolation and compaction Cwhicker/elm/use_firn_percolation_and_compaction May 29, 2024
@rljacob rljacob requested a review from bishtgautam May 29, 2024 17:09
@chloewhicker chloewhicker changed the title Cwhicker/elm/use_firn_percolation_and_compaction Adds a new snow compaction & routing scheme in ELM May 30, 2024
@@ -249,7 +249,8 @@ subroutine elm_varcon_init()
allocate( dzsoifl(1:nlevsoifl ))

if (use_extrasnowlayers) then
h2osno_max = 30000._r8
!h2osno_max = 1000._r8
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can you please delete this commented out line?

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Done. Thanks for catching that.

@bishtgautam bishtgautam added the BFB PR leaves answers BFB label Jun 24, 2024
bishtgautam added a commit that referenced this pull request Jun 24, 2024
…next (PR #6413)

Modifies the ELM snowcapping routing scheme along with the snow and firn compaction
schemes to include changes made by [Schneider et al., (2022)](https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021MS002542)
but retain the original 5-layer snowpack, these modifications can be turned on by
setting use_firn_percolation_and_compaction = .true. in user_nl_elm

[BFB]
[NML]
@bishtgautam bishtgautam self-requested a review June 24, 2024 22:17
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4 participants