# Presentation: 674895

## Example Simulations

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-   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

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- 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: Inputs

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## Example 1: Results

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## Example 2: Back Trajectory

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- Source Location: 	Nashville, TN (36.13N, 86.68W) @ 750 meters AGL
- Date/Time:	December 22, 2005 @ 1400 UTC
- Duration:		Backward 72 hours
- Meteorology: 	GFS
- Display:		Zoom set to 80%
- 		Endpoint labels every 12 hours
- 		Vertical display coordinate set to Meters-agl
- 		Optional Google Earth

## Example 2: Inputs

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## Example 2: Results

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## Example 3: Simple Dispersion

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- Source Location: 	Phoenix. AZ (33.43N, 112.02W) @ 10 meters AGL
- Source Duration:	1 unit/hr source emission for 2 hours
- Date/Time:	December 20, 2005 @ 1900 UTC
- 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
- Meteorology: 	NAM 12 km
- Display:		Zoom set to 50%
- 		Optional Google Earth

## Example 3: Inputs

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## Example 3: Inputs

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## Example 3: Inputs

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## Example 3: Results

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## Example 4: Simple Dispersion

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- Source Location: 	Phoenix. AZ (33.43N, 112.02W) @ 10 meters AGL
- Source Duration:	1 unit/hr source emission for 2 hours
- Date/Time:	December 20, 2005 @ 1700 UTC
- 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
- Meteorology: 	NAM 12 km
- Display:		Zoom set to 100%
- 		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 4: Inputs

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## Example 4: Inputs

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## Example 4: Inputs

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## Example 4: Results

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## Example 5: Meteorology

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- 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
- Meteorology: 	NAM 12 km
- 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 be		determined by running profile.

## Example 5: Contour Inputs

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## Example 5: Results

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- Approximate location of source

## Example 5: Profile Inputs

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## Example 5: Results

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- Wind Direction and Speed at 1000 hPa
**Date/Time****	****WDIR****	****WSPD**
- 20/1500		114.2	1.4
- 20/1800		155.7	0.5
- 20/2100 		288.2	1.5
- 21/0000 		294.5	2.6