Hi. I have been sucessfully using the PC version of HYSPLIT to convert ERA-Interim 1.5 degree gridded data downloaded from http://data-portal.ecmwf.int/data/d/interim_daily/
into the ARL format using the Meteorology>Convert to ARL>ECMWF ERA menu option. That's all nice!
However I am having trouble converting 0.75 degree resolution data dowloaded from the new server at http://apps.ecmwf.int/datasets/data/interim_full_daily/
. Now that the higher resolution data is available, I want to see if this provides any advantages over the 1.5 degree data.
GRIB2ARL appears to do the conversion OK in the sense that no error messages are thrown up, but when I use the Check File option (under Meteorology>Display Data) I get error messages like the following:
*ERROR* metset: meteorological data time interval varies
Changed from 360 min to -1080 min
At day/hr 1 0
The listing in Working/checkfile.txt is not what I expect, with incorrect time stamps and fields zeroed from part way through the listing, presumably due to a problem associated with decoding time information from the GRIB files. Trajectory runs using the created ARL data get terminated at the point where the time information in the checkfile.txt listing goes awry. I've been careful to ensure that the 3 files required (invariant, surface and level) have consistent gridding. I've used the ECMWF GRIB-API to examine the files from the new server - they look to be in GRIB1 format, and I can't see an issue with the contents compared with the 1.5 degree data from the old server, except possibly from some extra padding.
I haven't yet used API2ARL to convert the data - I'm wondering if I have to do this (noting there is mention on the board of the ECMWF server moving to GRIB2 format) or if there is some other solution.
Has anyone had a similar issue? Thanks!