Grib1 To Grib2 Converter Cc
ncl-talk How to convert netcdf to grib format Guido Cioni guidocioni at gmail.com Mon Feb 13 03:50:12 MST 2017. Previous message: ncl-talk How to convert netcdf to grib format Next message: ncl-talk How to convert netcdf to grib format Messages sorted. Grib1 To Grib2 Converter Cc. This sample C program is an example of how to use the GRIB0/GRIB1 decoder. GRIB2 decoder. GRIB2 to GRIB1 converter: This C program will convert from GRIB2. THREDDS is working on putting a netCDF API on top of grib1 and grib2. Lire la suite.
Some comments:. As FLEXPART is using gribapi to read the gribmessages from file, I'm wondering why (in case of ECMWF) you are NOT using the edition independent GRIB API keys ( )!
When using those keys no one needs to distinguish between GRIB1 and GRIB2!. Why is preciptation saved in GRIB2 Format?
What is the purpose of conversion? In MARS, only 3D-Parameters are retrieved in GRIB2, surface parameter still remains in GRIB1. So why is the conversion to GRIB2 done? Preciptation did NOT change units! Replying to:. As FLEXPART is using gribapi to read the gribmessages from file, I'm wondering why (in case of ECMWF) you are NOT using the edition independent GRIB API keys ( )!
As far as I understand, key is a general concept. Looking deeper I find paramId Unique identifier of the parameter. A parameter in different formats (grib1/grib2) is identified by the same ID. ShortName Not unique. Different parameters can have the same short name. Name Not unique.
Different parameters can have the same name. Is paramID what is presently used? If so, what are the problems? If not, shouldn't we use it?.
Why is preciptation saved in GRIB2 Format? What is the purpose of conversion? In MARS, only 3D-Parameters are retrieved in GRIB2, surface parameter still remains in GRIB1.
So why is the conversion to GRIB2 done? Preciptation did NOT change units! should be clarified by Leo. Replying to pesei,pasko Indeed it seems better to use paramId instead of shortName. In earlier GRIB FORTRAN APIs one could not get paramId.
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This was likely also the reason why FLEXPART developers resorted to parametertype, parameternumber to identify fields. Even today, you will see that paramId is only output by gribdump if fields are in GRIB1 format, whild parametercategory and parameternumber are output if fields are in GRIB2 format. However, if one specifies paramId in gribls, one gets paramID for both GRIB1 and GRIB2. So I will give this a try. Regarding precipitation: If one tries to convert convective precipitation from GRIB1 into GRIB2, it is changed to parametername acpcp (liquid convective precipitation) by gribset.
Grib1 To Grib2 Converter Cc Pdf
This parameter has units kg/m2. So far I found no way to avoid that unless to leave the field in GRIB1.
There are two reasons why one would like all files in the same format: 1) IO Codes are easier to maintain 2) GRIB2 allows JPEG compression, which is slow but allows substantial file size reductions. One may want to compress also the surface fields, not only model level fields.
Grib1 To Grib2 Converter Cc To Pdf
This should be enough reason to give users the choice to safely convert everything into GRIB2.