Back trajectories

Topics about the HYSPLIT trajectory model.

Back trajectories

Postby arl.noaa » November 13th, 2012, 9:34 am

I am trying to model a reverse trajectory for an ozone monitoring station. Several of the readings occurred in June. How can I do this?

Thanks in advance
arl.noaa
 
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Re: Back trajectories

Postby glenn.rolph » November 13th, 2012, 9:35 am

On the web, you will need to run the Archived Trajectories under the URL:
http://ready.arl.noaa.gov/HYSPLIT_traj.php

We would recommend you use either the EDAS 40 km meteorological data or the NAM 12 km meteorological data for the United States.
Then set the time you want the trajectory to start (in the backward mode, you set the time the air reached your sampler) and then select the Backward button.
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Re: Back trajectories

Postby gracy.hm » December 16th, 2013, 2:53 am

Hi,
Can someone tell me that the MODEL VERTICAL VELOCITY option in the online version of Hysplit [ RIGHT side of figure in circle] corresponds to which option in the registered PC (window) version [ LEFT side of options in figure]

Please have a look at Image

I shall be extremely thankful for any reply.
Thanks
Gracy
Attachments
query.jpg
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Re: Back trajectories

Postby glenn.rolph » December 16th, 2013, 11:02 am

The web option "Model Vertical Velocity" corresponds to the "input model data" option in the PC version.
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