[Ncep.list.fv3-announce] test

Mon Apr 10 15:50:20 UTC 2017

Here are a few other helpful debugging tips...

For those who are seeing issues with reproducibility with the FV3GFS with
IPD, there is a namelist option to help narrow down potential sources of
error:   atmos_model_nml::chksum_debug.
Setting this flag to .true. will print out the global checksum of most
every variable in the IPD_Data sub-containers after each of the major
steps:  radiation; physics;  stochastic physics;  and the atmospheric state
update.  We use frequently use techniques such as this at GFDL to help
narrow down reproducibility issues under various scenarios including code
updates.

As has been alluded to, there are also ways to run the system in
physics-only mode, which is analogous to a global domain "single-column
model".  Simply setting fv_core_nml::no_dycore=.true. will bypass the
advection phase of the dynamic core.

To run the system in dynamics-only mode, set
atmos_model_nml::dycore_only=.true.

Setting both atmos_model_nml::dycore_only and fv_core_nml::no_dycore to
.true. will simply exercise the framework.

Rusty
--
Rusty Benson, PhD
Modeling Systems Group
NOAA Geophysical Fluid Dynamics Lab
Princeton, NJ

On Mon, Apr 10, 2017 at 10:33 AM, Shrinivas Moorthi <
shrinivas.moorthi at noaa.gov> wrote:

> Thanks all,
>      I am compiling with the DEBUG=Y option and it is using the option
> suggested by Jim.
> However, I haven't had any success figuring out yet. I am trying to debug
> with "no_dycore=.true." as suggested by SJ.
> Moorthi
>
> On 04/10/2017 10:13 AM, Dusan Jovic - NOAA Affiliate wrote:
>
> Moorthi,
>
>  If you are using standalone FV3, the configuration files already contain
> DEBUG flag which turns on many debugging compiler flags. Simply run:
>
> make DEBUG=Y
>
> or if you are using compile script (in the top-level directory of the
> standalone fv3 repository)
>
> ./compile DEBUG=Y
>
> I'm not sure how this option can be used from NEMS (ie. nems builder).
>
> Dusan
>
> On Sun, Apr 9, 2017 at 3:26 PM, James Rosinski - NOAA Affiliate <
> james.rosinski at noaa.gov> wrote:
>
>> FYI if you are using the Intel compiler, the flag -fpe0 will cause the
>> run to stop when a NaN is generated. Adding "-traceback -g" will give a
>> human-readable traceback when the run aborts.
>>
>> Jim Rosinski
>>
>>
>> On Sun, Apr 9, 2017 at 10:34 AM, Shian-Jiann Lin - NOAA Federal <
>> shian-jiann.lin at noaa.gov> wrote:
>>
>>> Not sure there is a general way to diagnose NaN, as this can coe from
>>> any place.
>>> But a helpful option is to set
>>>
>>> no_dycore = .T.
>>>
>>> and run the whole model like multi-column physics only (no FV3) model.
>>>
>>> You may also set fv_debug = .T. to see where the Nan started.
>>>
>>>
>>> Shian-Jiann Lin
>>> NOAA/Geophysical Fluid Dynamics Laboratory
>>>
>>> On Sun, Apr 9, 2017 at 12:50 PM, Shrinivas Moorthi - NOAA Federal <
>>> shrinivas.moorthi at noaa.gov> wrote:
>>>
>>>> SJ,
>>>> Any suggestion on how to track a NAN in fv3?
>>>> Thanks
>>>> Moorthi
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Apr 9, 2017, at 1:53 AM, Shian-Jiann Lin - NOAA Federal <
>>>> shian-jiann.lin at noaa.gov> wrote:
>>>>
>>>> If you only have the raw data with 6 tiles you must perform a
>>>> cube2latlon regrid.
>>>>
>>>> On Sun, 9 Apr 2017 at 5:21 AM Ruiyu Sun - NOAA Affiliate <
>>>> ruiyu.sun at noaa.gov> wrote:
>>>>
>>>>> Hi guys,
>>>>>
>>>>> Can anyone tell me how to calculate the global zonal mean of cloud
>>>>> condensate based on the 6 nggps3d tile nc files ?
>>>>>
>>>>> Thanks!
>>>>> Ruiyu
>>>>>
>>>>> nggps3d.tile1.nc,
>>>>> nggps3d.tile2.nc,
>>>>> nggps3d.tile3.nc,
>>>>> nggps3d.tile4.nc,
>>>>> nggps3d.tile5.nc,
>>>>> nggps3d.tile6.nc,
>>>>>
>>>>> On Fri, Apr 7, 2017 at 9:19 AM, Jun Wang - NOAA Affiliate <
>>>>> jun.wang at noaa.gov> wrote:
>>>>>
>>>>> Dear all,
>>>>>
>>>>> This is a test email, please ignore. Thanks.
>>>>>
>>>>> Jun
>>>>>
>>>>> _______________________________________________
>>>>> Ncep.list.fv3-announce mailing list
>>>>> Ncep.list.fv3-announce at lstsrv.ncep.noaa.gov
>>>>> https://www.lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.
>>>>> fv3-announce
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Ncep.list.fv3-announce mailing list
>>>>> Ncep.list.fv3-announce at lstsrv.ncep.noaa.gov
>>>>> https://www.lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.
>>>>> fv3-announce
>>>>>
>>>> --
>>>> Sent from Gmail Mobile
>>>>
>>>> _______________________________________________
>>>> Ncep.list.fv3-announce mailing list
>>>> Ncep.list.fv3-announce at lstsrv.ncep.noaa.gov
>>>> https://www.lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.
>>>> fv3-announce
>>>>
>>>>
>>>
>>> _______________________________________________
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>>>
>>>
>>
>> _______________________________________________
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>>
>>
>
>
> _______________________________________________
> Ncep.list.fv3-announce mailing listNcep.list.fv3-announce at lstsrv.ncep.noaa.govhttps://www.lstsrv.ncep.noaa.gov/mailman/listinfo/ncep.list.fv3-announce
>
>
>
> --
> Dr. Shrinivas Moorthi
> Research Meteorologist
> Global Climate and Weather Modeling Branch
> Environmental Modeling Center / National Centers for Environmental Prediction
> 5830 University Research Court - (W/NP23), College Park MD 20740 USA
> Tel:(301)683-3718 <(301)%20683-3718>
>
>
> _______________________________________________
> Ncep.list.fv3-announce mailing list
> Ncep.list.fv3-announce at lstsrv.ncep.noaa.gov
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>
>
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