Fanglin Yang

I recall we did test compression for writing out GFS.v16 restart files by FMS . Using the following reduce the size of restart file by 50% &mpp_io_nml shuffle=1, deflate_level=5, /...

We probably should talk to the NCAR FV3 team (Steve Goldhaber, Peter Lauritzen etc) to learn how they are generating the field_table "on the fly". They worked on reengineering the...

Julian days are used in astronomical / radiation calculations in the current physics.

Jun, I recall we had a lengthy discussion on this topic, and I cannot recall all the details now. I will check my notes. My impression is that we decided...

Pasted below is Cathy's reply From what I recall, we found that the GSI is not entirely consistent with its treatment of tracers and mixing ratio, though mostly assumed moist...

Found a lengthy discussions on this topic happened in March 2021. ---------------------- Fanglin to Daryl, Cathy, Russ, George, and Jun We are still having conversations with GFDL to clarify how...

Another summary found in my emails 03/12/2021 The ECM DA team has confirmed that 1) for both GFS.v15 and v16, pressures (Psfc and delp) and tracer mixing ratios inside the...

@junwang-noaa I'd like to bring this topic back to attention before GFS.v17 and GEFS.v13 are finalized

@junwang-noaa The reasons for using moist air mixing ratio were explained in my comments made above on 03/15/2022 in this thread. The issue is whether or not to include cloud...

@junwang-noaa I think in the model we always use a predefined dry air density. O3 and other gas tracers do not need to be used to explicitly compute dry air...