Back-trajectory calculations taking significant time

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lcbasler
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Joined: April 25th, 2023, 6:01 pm
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Back-trajectory calculations taking significant time

Post by lcbasler »

I am running 120 hour back-trajectories using (concatenated) NARR meteorological data on the GUI. Using the daily run tool, I hope to run 10 years of back-trajectories at one location at 6-hour intervals.

However, each back-trajectory calculation takes a significant amount of time, generally 2-3 minutes, making this total run time-prohibitive (with the total run taking an estimated 15-20 days).

Is this run-time typical for this sort of HYSPLIT back-trajectory calculation? And if so, I assume it’s just a matter of finding a machine with more memory? I am using a 2017 MacBook Air with 8 GB of RAM, if that’s relevant.

It does seem like the run-time is pretty unpredictable, with back-trajectory calculations sometimes taking only a few seconds each, or other times taking >5 minutes. Often the program will freeze and give the Mac spinning “beach-ball” for a few minutes, delaying the results. Leaving HYSPLIT running over-night doesn’t seem to improve the calculation speed.

Any help would be much appreciated.
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