Hello Gembuds -
I'm trying to do something relatively simple it would seem (ha), and
I need a little advice/direction. I'm looking at NARR (reanalysis
data) and I'm able to decode into GEMPAK format and view it with
GDPLOT2, which is great. What I want to do is end up with GEMPAK
files with only the specific parameters I want. For example, let's
suppose I want a gempak file with just 500 mb temp/heights/vort, and
700 mb temp/heights/vort. I'm trying to figure the most
straightforward/efficient way to do this, I think I just need to be
pointed in the right direction.
It seems there are three possible directions to head. 1) use dcgrib2
with command line options to only decode certain parameters, or 2)
use dcgrib2 and custom grib tables to only decode certain parameters,
or 3) use NAGRIB to create a new grid from the fully decoded grid,
which would only contain the particular parameters I need.
I want to have files for all 30 years of NARR, but the fully decoded
grids are way to big to save everything, hence my need to trim them
down to just what I need.
Any advice here would be appreciated, or perhaps a method I haven't thought of.