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NCAR / amwg_dev

Repo to store model sandboxes and cases used for CAM development
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f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae_numcin2.001 #400

Open cecilehannay opened 1 year ago

cecilehannay commented 1 year ago

Description:

Same as f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae.001 (https://github.com/NCAR/amwg_dev/issues/353) except:

zmconv_num_cin=1->2

The ZM scheme only allows one layer of -ve buoyancy in. a column before terminating at the convective top. This was introduced in CAM6 and generally produces too shallow convection. However, now it seems this is too limiting given the increase to L58 and the moderation of parcel buoyancy properties by the ZM2 parcel mixing changes. Relax this limit to 2 (-ve buoyancy levels). For context, this value was 5 prior to CAM6.

Case directory: Locally (if still available): /glade/p/cesmdata/cseg/runs/cesm2_0/f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae_numcin2.001

On github: https://github.com/NCAR/amwg_dev/tree/f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae_numcin2.001

Sandbox: Locally (if still available): /glade/work/hannay/cesm_tags/cam6_3_119

On github: (https://github.com/ESCOMP/CAM/tree/cam6_3_119)

Diagnostics: ADF diags (if available) https://webext.cgd.ucar.edu/FLTHIST/f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae_numcin2.001/atm/

Output: On derecho (if still available) /glade/derecho/scratch/hannay/archive/f.cam6_3_119.FLTHIST_ne30.r328_gamma0.33_soae_numcin2.001/

Contacts: @swrneale @JulioTBacmeister @PeterHjortLauritzen @adamrher @cecilehannay

Extra details: N/A

adamrher commented 1 year ago

anyone know why this run stopped after 1 submit? There are 4 resubmits still left in env_run.xml, and a qstat -u hannay indicates there's nothing in the queue.

swrneale commented 1 year ago

There's no doubt numcin2 and 3 suppresses high frequency variability in the tropics associated with propagating modes. This is not entirely surprising given the increases in variability seen between CAM5 and CAM6. image

adamrher commented 1 year ago

Does this mean @JulioTBacmeister gets his $1?

Have you tried using some of the more recent datasets like IMERG or MSWEP? @islasimpson has some MSWEP daily data:

/project/mojave/observations/OBS-PR/MSWEPv2

Isla also has IMERG data but it's monthly. And my understanding is that some of IMERG data is reprocessing of the raw TRMM data. I've been finding that TRMM has systemically larger precip rates than these other datasets. I don't know that that would impact the variability in the WK plots though.

swrneale commented 1 year ago

TRMM kf variability is certainly of a higher magnitude than GPCP, but mostly in the peripheral parts of the spectra and high frequency, fast time scales. For what we care about it's fine I think. Just to reiterate that CESM2 saw an increase in overall activity from CESM1 to CESM2 somewhat because of the numcin5->numcin1 change.
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