New NCEP FV3 GRIB files result in minor FLEXPART errors

[donaldjmorton]

I believe this is a very minor issue, but I've examined it extensively to back up my beliefs, and thought I would post my report here just in case somebody, someday thinks this is a bigger issue and wants to look into it further.

In short, I think that the new NCEP FV3 GRIB files will work fine for low-altitude simulations (like, within the tropopause!!), but if anybody starts doing things at very high altitudes, "maybe" there is reason for concern.

The report is being attached to this ticket (I hope).

[donaldjmorton]

Report on use of GFS FV3 datasets in FLEXPART

[pesei]

Thank you very much, Don. I assign this to Milestone FLEXPART 10, hoping it will be checked whether this is solved in v10.4.