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Isobaric trajectories

Posted: September 10th, 2014, 11:18 am
by lnguyen5
Hi,
I've been working lately on backward trajectories. I noticed that I ran isobaric trajectories, there's a variation of the level pressure along the trajectories. Since the method used is isobaric, the level pressure should be constant isn't it ? I was wondering if there were some kind of explanation, or am I using Hysplit wrong ?
Best regard,

Re: Isobaric trajectories

Posted: September 10th, 2014, 1:34 pm
by glenn.rolph
Please see the following FAQ regarding this issue:

http://www.arl.noaa.gov/faq_hg12.php