Unusual trajectories in Colombia (Nevado del Ruíz Volcano)

Topics about the HYSPLIT trajectory model.
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jgacostal
Posts: 3
Joined: May 15th, 2018, 6:46 pm
Registered HYSPLIT User: No

Unusual trajectories in Colombia (Nevado del Ruíz Volcano)

Post by jgacostal » May 16th, 2018, 10:05 am

Good morning,

We used the HYSPLIT Trajectory Model (Compute archive trajectories - Normal - GDAS 0.5 °- 3170 meters AGL) with the objective of analyzing the trajectories associated with the Nevado del Ruiz volcano (4° 53' 43' 'N 75° 19' 21''W) for different periods of the year 2015. However for the days 19 and 20 of February, the trajectories obtained showed a quite strange behavior.

We would like to know what these behaviors may be due to?
Attachments
148187_trj001.gif
148190_trj001.gif

barbara.stunder
Posts: 273
Joined: November 9th, 2012, 4:23 pm
Registered HYSPLIT User: Yes

Re: Unusual trajectories in Colombia (Nevado del Ruíz Volcano)

Post by barbara.stunder » May 16th, 2018, 10:20 am

Have you looked at the wind fields or height contours using the 2D plotting programs at https://ready.arl.noaa.gov/READYamet.php to see if the trajectories look plausible? The trajectory is just a computation using the wind fields. The GDAS0P5 is not available for plotting but the GDAS1 is. You can also look at trajectories starting at different hours/days to see if these trajectories look reasonable.

jgacostal
Posts: 3
Joined: May 15th, 2018, 6:46 pm
Registered HYSPLIT User: No

Re: Unusual trajectories in Colombia (Nevado del Ruíz Volcano)

Post by jgacostal » May 20th, 2018, 7:27 pm

We will try to see what results we get.
Thanks a lot!

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