CRUJRA-SP (ctsm51d142_f19_CRUjra_[1850, hist]_flds)

[wwieder]

Description:

Given results in #20 and #35 I wonder if we should try using the CRUJRA longwave?

Initially, a clone of #20 seems logical to see if we see a downward trend (or any other issues) with using the FLDS provided in CRUJRA?

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Case directory:
Spin-up: /glade/u/home/slevis/cases_LMWG_dev/ctsm51d142_f19_CRUjra_1850_flds
Hist: /glade/u/home/slevis/cases_LMWG_dev/ctsm51d142_f19_CRUjra_hist_flds

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Sandbox:
/glade/work/slevis/git_ctsm_tags/ctsm5.1.dev142

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user_nl_ changes:
As in #20 except:
diff between user_nl_datm_streams

49c49
< CLMCRUNCEPv7.TPQW:datavars = QBOT Sa_shum,PSRF Sa_pbot,TBOT Sa_tbot,WIND Sa_wind,FLDS Faxa_lwdn
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> CLMCRUNCEPv7.TPQW:datavars = QBOT Sa_shum,PSRF Sa_pbot,TBOT Sa_tbot,WIND Sa_wind

Also user_nl_clm in the hist case here will point to this case's corresponding finidat.

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SourceMods:
NONE

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Diagnostics:
With CRUjra FLDS vs. with clm-calculated FLDS:
https://webext.cgd.ucar.edu/I20TR/ctsm51d142_f19_CRUjra_hist_flds/lnd/ctsm51d142_f19_CRUjra_hist_flds.1995_2014-ctsm51d142_f19_CRUjra_hist.1995_2014/setsIndex.html

With CRUjra FLDS vs. GSWP3, showing trends from 1901 to the present: https://webext.cgd.ucar.edu/I20TR/ctsm51d142_f19_CRUjra_hist_flds/lnd/ctsm51d142_f19_CRUjra_hist_flds.1995_2014-ctsm51d142_f19_GSWP3V1_hist.1995_2014/setsIndex.html

ILAMB:
https://webext.cgd.ucar.edu/I20TR/ctsm51d142_f19_CRUjra_hist_flds/lnd/_build_ILAMB2_7_ForcingDatasets_flds/

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Output:
/glade/campaign/cgd/tss/people/slevis/i_cases/cases_LMWG_dev/ctsm51d142_f19_CRUjra_1850_flds/
/glade/campaign/cgd/tss/people/slevis/i_cases/cases_LMWG_dev/ctsm51d142_f19_CRUjra_hist_flds/

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Contacts:
@slevis-lmwg

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Extra details:
Same as #20

[slevis-lmwg]

@olyson @wwieder
I decided to try premium and the run has started!
(So I moved #38 to premium, as well.)

[wwieder]

awesome! any preliminary results (even as an ncview of ncdiff) of monthly snowdepth or TBOT that we can share at tomorrow's meeting could be helpful. I'm working on slides here <https://docs.google.com/presentation/d/1Y2uYNcWb1RcSY30I6E8J0AboTC0nG6HD9Jtlssu0_Bs/edit?usp=sharing> .

[slevis-lmwg]

@wwieder I just posted diags above. I have not looked at them, yet.
(The simulation finished last night.)

[slevis-lmwg]

I added a plot to the slides

[slevis-lmwg]

I have started new diagnostics to plot the full trends: 1901-2022

[slevis-lmwg]

Full trends should be up. See link above.

[wwieder]

Thanks. Global FLDS trends seem ok here.
I don't see any glaring issues in the arctic regional plots either.

There seems to be a jump in global FSDS that I don't really understand, but suspect they're related to the transition from CRU to JRA forcing? I think JRA55 starts in 1958.

[wwieder]

Also less summer snow at the end of the run with CRU-JRA, but air temperature are colder, here for the whole polar region.

@olyson when you're back next week can you add this case to the ILAMB-SP diagnostic plots. Then, assuming the seem OK, it's maybe worth repeating #35 with the CRU-JRA_flds inputs included?

[olyson]

Sure!

[olyson]

Added this case to the ILAMB comparison here:
https://webext.cgd.ucar.edu/I20TR/ctsm51d142_f19_CRUjra_hist_flds/lnd/_build_ILAMB2_7_ForcingDatasets_flds/
Snow water equivalent certainly looks better with flds.

[wwieder]

Thanks for posting, Keith.

So does the seasonal cycle of incoming longwave!
.