Error in backward tracking when encountering the dateline

Topics about the HYSPLIT trajectory model.
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bliucy
Posts: 2
Joined: October 14th, 2020, 6:19 pm
Registered HYSPLIT User: No

Error in backward tracking when encountering the dateline

Post by bliucy »

Dear Sir or Madam,

Recently I got a problem when using HYSPLIT to do backward tracking. I have made a lot test running. The tracking always stop in the vicinity of the dateline (180), the terminal longitude is like -176, 175 and so on. The input data is from ERA5. I have used ERAI, NCEP dataset before and found no problem. So I wonder if you could help me on this issue. Thanks so much.

With best regards,

Bo
alicec
Posts: 277
Joined: February 8th, 2016, 12:56 pm
Registered HYSPLIT User: Yes

Re: Error in backward tracking when encountering the dateline

Post by alicec »

Is the dataset global?
You may encounter this problem if you have a data which covers the poles but not
the whole globe - e.g. it covers -180,180 and then from 45 latitude to 90 latitude.
HYSPLIT will only apply cyclic boundary conditions to a global dataset.
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