HYSPLIT Forum: hysplitbbs.arl.noaa.gov

i found the error in the conversion. the conversion from "z" to "dz/dt" in the api2arl file just created errors (***) in the ARl file. after removing this parameter the conversion worked fine and i can now use the model data input for the trajectories.

thank you very much for your help
lg Matthias

Thank you for your answers. The trajectories calculated without error when the vertical velocity was changed to isosigma. But now i am very concerned about the quality of the calculation. I had another look at my Grib file. The parameter w - vertical wind speed is available and is probably somehow u...

Hello Alice, thanks for your reply. I also wondered why its running in the forward direction. I checked again and noticed that even that there is no error the output makes no sense. The trajectory drops to 0 after the first step. i tried it for many heights from 1 to 10000 and its always the same. A...

I made some progress but encountered another problem. I was able to change the api2arl file to accept more levels and the api2arl program is running without a error message. My problem occurs when I try to calculate the back Trajectory (the forward one works ) There is just no output in the tdump fi...

Hello, i am trying to convert ecmwf IFS data to arl. The api2arl converter works fine for 50 levels. My only problem is that I have 137 levels to convert and the max Value seems to be 50. When I try to change it in the api2arl_v4.f file I get invalid memory reference errors. Is there a proper was to...

Thanks for your reply. It worked all right for me. It gave an error message but until the hight of 10000meters it worked fine. thats also the region i'm interested in. Now I got another problem. Ecmwf changed to Grib2 an now i ḿ struggling doing the conversion with api2arl. Fist it was impossible to...

Hello. thank you very much for your reply. It took me some time to get everything in order. The conversion works for the most part. in My Data I got 91 modell levels. when I try to do the conversion i get this Error. 900 900 while executing "exec $exec_dir/grib2arl.exe $arg1 $arg2 $arg3 $arg4 $arg9 ...

Hello, I am new to Hysplit so I need some help to get my data running. I have the registered PC version and Linux but i don't really know where to start. I should use the integrated forecast system (IFS) data of ecmwf in the netcdf format ( 3 hour resolution on a 0.25 x 0.25 grid ) . I can also get ...