HANDS-ON EXERCISES

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Part 2: Trajectory Methods

Example SimulationsExample Simulations

Now that you’ve had a chance to run a few more difficult trajectory analyses, you can run through the following examples that include simple and more complex simulations 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: Multiple Trajectories

Example 1: Multiple Trajectories

Source Location: Houston, Texas (29.65N, 95.28W) @ 10 and 750 meters AGL

Date/Time: February 17, 2009 @ 1200 UTC (can use default zeros)

Duration: Forward 48 hours

Meteorology: NAM 40 km (hysplit.t12z.namf40w)

Display: Zoom set to 80%

Endpoint labels every 6 hours

Vertical display coordinate set to Meters-agl

Optional Google Earth

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Example 1: InputsExample 1: Inputs

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Setting the start locations & meteorology:

Displaying the results:

Multiple Trajectories

Example 1: ResultsExample 1: Results

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Multiple Trajectories

Example 2: Back Trajectory with Meteorology along Trajectory

Example 2: Back Trajectory with Meteorology along Trajectory

Source Location: Atlanta, Georgia (33.65N, 84.42W) @ 750 meters AGL

Date/Time: February 20, 2009 @ 0600 UTC

Duration: Backward 72 hours

Meteorology: GFS (hysplit.t12z.gfsfw)

Advanced: Plot Mixed Depth along trajectory

Display: Zoom set to 80%

Endpoint labels every 12 hours

Vertical display coordinate set to meteo-varb

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Example 2: InputsExample 2: Inputs

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Setting the starting location and meteorology:

Set the Mixed Depth using the Advanced / Configuration Setup / Trajectory menu option 6:

Back Trajectory with meteorology

Example 2: InputsExample 2: Inputs

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Displaying the results:Run model using SETUP File:

Back Trajectory with meteorology

Example 2: ResultsExample 2: Results

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Back Trajectory with meteorology

Example 3: Trajectory MatrixExample 3: Trajectory Matrix

Source Location: Define a 1 deg. x 1 deg. matrix between 28.0N, 95.0W and 35.0N, 85.0W with a starting height of 100 m AGL

Date/Time: February 17, 2009 @ 1200 UTC

Duration: 48 hours

Meteorology: NAM 40 km (hysplit.t12z.namf40w)

Advanced: Set the height unit to Relative to mean-sea-level

Display: Zoom set to 80%

Set Vertical Coordinate to Meters-agl

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Example 3: InputsExample 3: Inputs

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Setting the starting locations, time and meteorology:

Set the Height unit to Relative to mean-sea-level using the Advanced / Configuration Setup / Trajectory menu option 2:

Trajectory Matrix

Example 3: InputsExample 3: Inputs

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Run the Special Matrix Simulation using the SETUP file:

Click Continue…

Trajectory Matrix

Example 3: InputsExample 3: Inputs

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Display the results:

Set the Time Label Interval to 0:

Set the Zoom to 80%:

Optionally, set the Label Source to Off:

Trajectory Matrix

Example 3: ResultsExample 3: Results

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Trajectory Matrix