Bucket change during integration

[junwang-noaa]

Description

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RRFS requested to allow bucket change during integration. This is initial code updates for that capability.

At this time, the bucket (fhzero) is updated the forecast side, we need to update attribute at forecast time to pass the change to write grid component.

Issue(s) addressed

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• fixes #<issue_number>
• fixes noaa-emc/fv3atm/issues/<issue_number>
• fixes Add the ability to handle accumulations and max/min computations over multiple time windows ufs-community/ufs-weather-model#1983

Testing

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test with regional_control test. The code is backward compatible, there is no impact on current tests.

Dependencies

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• waiting on noaa-emc/fv3atm/pull/<pr_number>

[MatthewPyle-NOAA]

I think one item for RRFS got lost along the way - the need for tracking multiple bucket lengths at the same time (namely 15 minute and 1 hour). But we've recently decided to avoid generating most "bucket" type fields from the RRFS 15 minute output, and just use an external code to generate 15 minute QPF buckets from the running QPF total. Sorry for the confusion.

[junwang-noaa]

@MatthewPyle-NOAA Thanks for clarification. Currently model does not support multiple buckets at the same time. In this branch, model only supports a single bucket, but the bucket length could change. I tested the branch with non-integer bucket length (0.25 hour), this history has correct bucket length, but UPP does not support non-integer bucket.

Here is the output from a test run:

history file:

// global attributes:
                :cen_lat = 38.f ;
                :cen_lon = -120.f ;
                :dtp = 36.f ;
                :dx = 3000.f ;
                :dy = 3000.f ;
                :fhzero = 0.25f ;
                :grid = "lambert_conformal" ;
                :grid_id = 1LL ;

The post grib file:

851:33388831:vt=2022082403:surface:3-3 hour acc fcst:APCP Total Precipitation [kg/m^2]:
    ndata=61440:undef=511:mean=0:min=0:max=0
    grid_template=30:winds(N/S):
        Lambert Conformal: (320 x 192) input WE:SN output WE:SN res 0
        Lat1 35.299999 Lon1 234.750000 LoV 240.000000
        LatD 38.000000 Latin1 38.000000 Latin2 38.000000
        LatSP 0.000000 LonSP 0.000000
        North Pole (320 x 192) Dx 3000.000000 m Dy 3000.000000 m mode 0

[MatthewPyle-NOAA]

Thanks for your work on getting sub-hourly buckets working (at least in the model). I'm guessing we'll use this functionality in some fashion with RRFS for our 15 minute output.

[DusanJovic-NOAA]

@junwang-noaa @MatthewPyle-NOAA Should this change go to develop or RRFSv1 branch or maybe both?

[MatthewPyle-NOAA]

@DusanJovic-NOAA We won't be utilizing it in RRFSv1, so just develop is fine.

[DusanJovic-NOAA]

This was replaced by #835. Closing.