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GSWP3V1 atmospheric forcing for 2011-2014 is "bad" over Antarctica #1269

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olyson opened this issue Feb 2, 2021 · 4 comments
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GSWP3V1 atmospheric forcing for 2011-2014 is "bad" over Antarctica #1269

olyson opened this issue Feb 2, 2021 · 4 comments
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bug something is working incorrectly closed: wontfix We won't fix this issue, because it would be too difficult and/or isn't important enough to fix science Enhancement to or bug impacting science

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@olyson
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olyson commented Feb 2, 2021

Brief summary of bug

When GSWP3V1 data was extended for 2011-2014, bad atmospheric forcing data (e.g., too warm temperatures) over Antarctica was introduced.

General bug information

CTSM version you are using: N/A

Does this bug cause significantly incorrect results in the model's science? Yes (over Antarctica)

Configurations affected: All configurations forced with 2011-2014 GSWP3V1 data including anomaly forcing experiments.

Details of bug

This is a known problem, but an issue hasn't been filed for it before.
Present in /glade/p/cgd/tss/CTSM_datm_forcing_data/atm_forcing.datm7.GSWP3.0.5d.v1.c170516.
Here is the latest information I have from Dave L. about the data (Feb 2018) and an anticipated fix :
"I informed Hyungjun about Antarctica. He says he will fix it next update (which won't be soon and which I think also will include fix to humidity and will actually be GSWP3v2). "

Important details of your setup / configuration so we can reproduce the bug

/glade/work/oleson/release-clm5.0.30/cime/scripts/clm50_r-clm5.0.30_1deg_GSWP3V1_iso_SSP245_AnomalyF2

Important output or errors that show the problem

https://webext.cgd.ucar.edu/IRCP/clm50_r-clm5.0.30_1deg_GSWP3V1_iso_SSP245_AnomalyF2/lnd/clm50_r-clm5.0.30_1deg_GSWP3V1_iso_SSP245_AnomalyF2.2025_2034-clm50_r-clm5.0.30_1deg_GSWP3V1_iso_SSP3-7_AnomalyF2.2025_2034/set6/set6_landf_Antarctica.png

@billsacks billsacks added the bug something is working incorrectly label Feb 2, 2021
@ekluzek
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ekluzek commented Feb 2, 2021

OK. Since this is an issue in forcing data, is technically inside of cime. So I'll file an issue there as well. Since it's most visible in CTSM I think it still makes sense to have an issue here as well. And actually even when it's fixed in cime it's not fixed in CTSM until CTSM brings a cime update in, so you need two issues anyway.

@mvertens
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mvertens commented Feb 2, 2021 via email

@ekluzek
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ekluzek commented Feb 2, 2021

As I understand this problem the only "fix" we could do until "v2" is out is to limit forcing to end in 2010. But, we likely don't want to do that. So I'm thinking we are just going to warn people about this problem. Is that what others think as well? @dlawrenncar @wwieder @danicalombardozzi?

@wwieder
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wwieder commented Feb 4, 2021

@dlawrenncar suggested that we should just warn users about this, but not stop the run in 2010. Data across Antartica are likely not worth trusting in offline simulations (as data for the reanalysis are basically absent). Instead, this region can be masked out in global diagnostics to avoid generating spurious results.

@ekluzek ekluzek added the closed: wontfix We won't fix this issue, because it would be too difficult and/or isn't important enough to fix label Feb 4, 2021
@ekluzek ekluzek self-assigned this Feb 4, 2021
@billsacks billsacks added closed: wontfix We won't fix this issue, because it would be too difficult and/or isn't important enough to fix and removed closed: wontfix We won't fix this issue, because it would be too difficult and/or isn't important enough to fix labels Dec 9, 2021
@samsrabin samsrabin added the science Enhancement to or bug impacting science label Aug 8, 2024
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