Meteo File Over-population about pysplit HOT 3 CLOSED

Thanks so much for posting this and #29 Maria! Looking at your overpopulated CONTROL, it clicks for me. The reason why PySPLIT is finding so many files is that when it's looking for 1998, 1999, 2000, 2001, it's really looking for:

• *98*, which is going to find the 1980s as well as 1998
• *99*, the 1990s
• *00*, the 2000s
• *01*, the 2010s and 2001

If you were to look at the CONTROL for your 1979 trajectories, you'd find 1997 in there too, and vice-versa. Four digit year ID is definitely necessary in your case. I've got an idea to fix this, which should enable an automatic way to correctly identify the trajectory's century as in issue #29 - choice of two or four digit year meteorology identification, choice of two or four digit year output to trajectory filename with 4 digit default. As you noticed, years are truncated to two digits in the trajectory files so user input or filename are the only options. I think filename is the way to go- trajectories from older PySPLIT versions will behave the same as previously, plus a mixed group of 2000s and 1900s trajectories can be identified correctly. Also I'm going to add an overpopulation warning to PySPLIT with instructions on how to rectify, similar to the one that triggers when 0 meteorology files are found.

Cheers,
Mellissa

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Hi Mellissa,

Yes, this makes so much sense! I was noticing a pattern, but couldn't pin down any arithmetic :-). And you are correct, the CONTROL file for 1979 and 1997 includes both years. Looking forward to your fix. I will be using it 👍

Best,
Maria

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This should be resolved with #32. I was able to distinguish between meteorology files labeled with 1911 and 2011 by setting meteoyr_2digits=False in pysplit.generate_bulktraj(). Default behavior (meteoyr_2digits=True) replicates the old behavior, i.e. too many files are found when both 2011 and 1911 files are available. However, now when more than 12 meteorology files are found an informative error is raised in PySPLIT before CONTROL overpopulation makes HYSPLIT unhappy.

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