HANDS-ON EXERCISES

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• HANDS-ON EXERCISES

Part 1 Meteorology
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Example Simulations

• Presented on the following slides are several
  meteorological data display examples that you can
  run prior to viewing the next few sections of the
  workshop.
• The first slide of each example will present
  the problem to be answered, the next few slides
  will show the GUI inputs, and the last slide will
  show the resulting map.
• It is recommended to click on the Reset button
  of the main HYSPLIT menu before proceeding in
  order to clear out any old cases in the working
  directory.
• Note These runs were produced using HYSPLIT
  version 4.9 (released January 2010). Slight
  differences are possible with older/newer
  versions of the model.

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Example 1 Meteorology

• Explore the wind field near New Orleans, LA, for
  a future dispersion exercise.
• Source Location New Orleans, LA (30.05N,
  90.03W)
• Date/Time February 18, 2009 beginning _at_1200 UTC
• Meteorology NAM 12 km SE US tile
  (hysplit.t12z.namsf.SEtilew)
• Display 1a) Show 10 meters wind vector maps
  every 3 hours beginning 1200 UTC February 18
  (see next page for defaults).
• 1b) Hourly profile output at source location
  beginning _at_1200 UTC using the Polar coordinate
  system to show wind direction and speed. (This
  may take a few minutes to generate.)
• Notes The NAM dataset begins with February 17,
  2009 _at_ 1200 UTC and has data every hour, which
  can be determined by running Check File.

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Example 1a Contour Inputs
Choose to display wind vectors at the surface
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Example 1a Results
Approximate source location (This symbol has been
added to the map manually here)
Note that the winds are initially from the SSW,
but then come from the WNW by 0600 UTC on
February 19.
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Example 1b Profile Inputs
Choose the profile location and
meteorology(hysplit.t12z.namsf.SEtile)
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Example 1b Results

• Wind Direction and Speed at lowest level
• Date/Time WDIR WSPD
• 18/1200 203.0 7.7
• 18/1500 212.9 9.7
• 18/1800 223.3 10.4
• 18/2100 231.9 10.0
• 19/0000 229.6 9.5
• 19/0300 248.1 7.0
• 19/0600 261.4 6.7
• 19/0900 317.2 6.2
• 19/1200 5.4 8.8