HYSPLIT/ALOHA Demonstration Glenn Rolph OAR Air Resources Laboratory June 21, 2016.

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Presentation transcript:

HYSPLIT/ALOHA Demonstration Glenn Rolph OAR Air Resources Laboratory June 21, 2016

Background Information ARL Science Review, June 21-23, ARL supports the 122 local National Weather Service’s Weather Forecast Offices (WFOs) with HYSPLIT atmospheric dispersion products to assist them with their decision support role in the local community. In 2007, a web-based HYSPLIT system was made available to the WFOs so they could run the model directly without contacting NCEP for a simulation, as done previously. In 2013, an enhanced web site was made available that included a more defined chemical source term model (ALOHA) through a cooperative effort with the NOAA National Ocean Service’s Office of Response and Restoration (OR&R), developers of the CAMEO/ALOHA software suite. 122 NWS Weather Forecast Offices

ARL Science Review, June 21-23, CAMEO Software Suite ALOHA CAMEO Chemicals MARPLOTCAMEOfm Tier2 Submit Chemical Property Database Source and Dispersion Model Mapping Application Planning Data Create Chemical Inventory The ALOHA component provides time-varying chemical emissions to HYSPLIT.

ARL Science Review, June 21-23, ALOHA Background Gaussian and heavy gas dispersion algorithms Designed for short-duration (< 60 min), short-range (< 10 km) incidents (no account for changes in wind direction/speed) Multiple time-dependent chemical source models (tank, puddle, gas pipeline, and direct release to the atmosphere) Used by thousands of first responders around the world Image from solarstorms.org. Tank Puddle Gas Pipeline

5 ARL Science Review, June 21-23, WFO enters information on the chemical being released based on communication with the local emergency responder ALOHA estimates how the chemical cloud escapes from the source over time. HYSPLIT uses ALOHA time-dependent source strength values to calculate the plume further downwind than is generally acceptable by the ALOHA dispersion model Output product shows a map of “Level of Concern” contours familiar to emergency managers. Training provided to the WFOs through video conferencing and the development of a COMET study module (University Corporation for Atmospheric Research - UCAR). A demonstration of this application will now be provided. HYSPLIT Integration with ALOHA

ARL Science Review, June 21-23, HYSPLIT/ALOHA Demonstration ARL READY web site

ARL Science Review, June 21-23,

88

9 ARL Science Review, June 21-23,

ARL Science Review, June 21-23,

11 ARL Science Review, June 21-23, Choose chemical simulation (HYSPLIT/ALOHA)

12 ARL Science Review, June 21-23, Choose meteorological forecast data

13 ARL Science Review, June 21-23, Choose source location

14 ARL Science Review, June 21-23, Optional forecast cycle and advanced options

15 ARL Science Review, June 21-23, Set release time and/or refine latitude/longitude

16 ARL Science Review, June 21-23, Enter ALOHA source strength calculation

17 ARL Science Review, June 21-23, Choose chemical based on name from list

18 ARL Science Review, June 21-23, Links for additional information on the selected chemical is provided.

19 ARL Science Review, June 21-23, Chemical information for ammonia is provided at the top. Choose the release type: Tank

20 ARL Science Review, June 21-23, Choose the type of tank: horizontal cylinder

21 ARL Science Review, June 21-23, Enter any two values to define the size/volume of the tank. Provide the chemical storage temperature if known and different from the ambient air temperature as obtained from the meteorological data.

22 ARL Science Review, June 21-23, Define the mass of the chemical in the tank: liquid level in tank

23 ARL Science Review, June 21-23, Liquid level in tank: 85 % full

24 ARL Science Review, June 21-23, Define the shape of the opening in the tank: rectangular

25 ARL Science Review, June 21-23, Define the size of the opening in the tank: 2 foot by 1 inch hole

26 ARL Science Review, June 21-23, Define the height of the leak: 1foot above the bottom of the tank

27 ARL Science Review, June 21-23, Summary of ALOHA source strength

28 ARL Science Review, June 21-23, Set duration of HYSPLIT run: 1 hour

29 ARL Science Review, June 21-23, Model running

30 ARL Science Review, June 21-23, Model results showing levels of concern (AEGL)

31 ARL Science Review, June 21-23, Model results displayed with ARL developed Flash interface