example simulations

1PC-HYSPLIT WORKSHOP

Example SimulationsExample Simulations

Presented on the following slides are several basic trajectory and dispersion simulations and meteorological data display examples that you can run prior to viewing section 3 and 4 of the presentation. Sections 3 and 4 will delve more deeply into the inner workings of the model and advanced settings of the GUI.

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 4.8 (released February 2008). Slight differences are possible with older/newer versions of the model.


Example 1: Multiple Trajectories

Example 1: Multiple Trajectories

Source Location: Dayton, Ohio (39.90N, 84.20W) @ 10 and 750 meters AGL

Date/Time: December 19, 2005 @ 1800 UTC

Duration: Forward 48 hours

Meteorology: NAM 12 km

Display: Zoom set to 80%

Endpoint labels every 6 hours

Vertical display coordinate set to Meters-agl

Optional Google Earth


Example 1: InputsExample 1: Inputs


Example 1: ResultsExample 1: Results


Example 2: Back TrajectoryExample 2: Back Trajectory

Source Location: Nashville, TN (36.13N, 86.68W) @ 750 meters AGL


Duration: Backward 72 hours

Meteorology: GFS


Endpoint labels every 12 hours

Vertical display coordinate set to Meters-agl



Example 3: Simple Dispersion


Source Location: Phoenix. AZ (33.43N, 112.02W) @ 10 meters AGL

Source Duration: 1 unit/hr source emission for 2 hours


Duration: Forward, 12 hours

Output: 12-hour average concentration between the surface and 100 meters

Grid Spacing: 0.05 degrees latitude and longitude

Grid Span: 20.0 degrees latitude and longitude

Deposition: None







Source Location: Phoenix. AZ (33.43N, 112.02W) @ 10 meters AGL

Source Duration: 1 unit/hr source emission for 2 hours


Duration: Forward, 6 hours

Output: 1-hour average concentration between the surface and 100 meters

Grid Spacing: 0.01 degrees latitude and longitude

Grid Span: 10.0 degrees latitude and longitude

Deposition: None



Center plot over the source and add four 20 km rings

Add county map background (file countymap)

Fix exponential contours

Optional: Create animated gif image


Example 5: MeteorologyExample 5: Meteorology

From the last case, investigate why the plume initially moved to the NW and then to the SE using HYSPLIT’s contour and profile program.

Source Location: Phoenix. AZ (33.43N, 112.02W)

Date/Time: December 20, 2005 between 1500-0000 UTC


Display: Show 10 meters wind vector maps

Profile output at source location from 1500-0000 UTC using the Polar coordinate system to show wind direction and speed. (This may take a few minutes to generate.)

Notes: The NAMF12 dataset begins with December 19, 2005 @ 1200 UTC and has data every 3 hours, which can bedetermined by running profile.

Example 5: Contour Inputs

Example 5: Contour Inputs




Approximate location of source

Example 5: Profile Inputs

Example 5: Profile Inputs




Wind Direction and Speed at 1000 hPa

Date/Time WDIR WSPD20/1500 114.2 1.420/1800 155.7 0.520/2100 288.2 1.521/0000 294.5 2.6

example simulations

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