Question on bucket_mm

[Tam Nguyen]

Hi all,

I currently run the WRF simulation for 10 year. Accidentally, I notice that I put the bucket_mm is 1mm instead of -1(inactive).
However, as I understand, one needs to specify also the config_bucket_update for it to activate the bucket reset.

I don't find the I_RAINC or I_RAINNC in any of my output. However, the precipitation is not always increasing overtime even if it's accumulated.

Any suggestion or explaination would very much be appreciated.

Thank you all.

 

[Ming Chen]

Hi Tam,

bucket-mm is a variable set for long-term climate simulation. It means that if the rainc ( or rainnc) is larger than this value, then rainc (and rainnc) will be recalculated as

rainc=rainc-bucket_mm

bucket-mm = -1 tells WRF this option is not activated. Any positive values indicate activation of this option, and you should see I_RAINC or I_RAINNC in wrfout files.

 

[Tam Nguyen]

Hi Ming Chen,

Thanks for replying to me. So I can conclude that even though the config_bucket_update is not necessarily needed to activate the bucket.

Hence, I understand that I should rerun the simulation once again.

 

[Ming Chen]

config_bucket_update is a derived option, which indicates that you don't need to explicitly set it.