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The '''National Atmospheric Release Advisory Center''' (NARAC) a national support and resource center for planning, real-time assessment, emergency response, and detailed studies of incidents involving a wide variety of hazards, including nuclear, radiological, chemical, biological, and natural | The '''National Atmospheric Release Advisory Center''' (NARAC) is a national support and resource center for planning, real-time assessment, [[emergency response]], and detailed studies of incidents involving a wide variety of [[hazards]], including [[Nuclear chemistry|nuclear]], [[Radioactivity|radiological]], [[Chemistry|chemical]], [[Biology|biological]], and natural [[emission]]s. | ||
NARAC | == NARAC's primary functions == | ||
NARAC | NARAC has a number of advisory functions. However, the two primary functions are: | ||
* Providing tools and services to federal, state and local governments, that map the probable spread of [[hazardous material]] accidentally or intentionally released into the atmosphere. | |||
* Providing [[atmospheric dispersion modeling|atmospheric plume predictions]] in time for an emergency manager to decide if action is necessary to protect the health and safety of people in affected areas. | |||
== Location and operational facilities == | == Location and operational facilities == | ||
Narac is located at the University of California's [[Lawrence Livermore National Laboratory]]. | Narac is located at the [[University of California]]'s [[Lawrence Livermore National Laboratory]]. | ||
The operational facilities provide by NARAC include: | The operational facilities provide by NARAC include: | ||
* A team of research and operational staff with expertise in atmospheric research, operational [[meteorology]], [[numerical modeling]], [[computer science]], [[software engineering]], [[geographical information systems]], [[computer graphics]] and [[hazardous material]] ( | * A team of research and operational staff with expertise in atmospheric research, operational [[meteorology]], [[numerical modeling]], [[computer science]], [[software engineering]], [[geographical information systems]], [[computer graphics]] and [[hazardous material]] (radiological, chemical, biological) properties and effects. | ||
* An operations center with uninterruptible power, backup power generators, robust computer systems and a staff on-duty or on-call 24 hours per day and 7 days a week. | * An operations center with uninterruptible power, backup power generators, robust computer systems and a staff on-duty or on-call 24 hours per day and 7 days a week. | ||
* Scientific and technical staff who provide support and training for NARAC tools, as well as quality assurance and detailed analysis of atmospheric releases. | * Scientific and technical staff who provide support and training for NARAC tools, as well as quality assurance and detailed analysis of atmospheric releases. | ||
Revision as of 19:28, 8 November 2008
The National Atmospheric Release Advisory Center (NARAC) is a national support and resource center for planning, real-time assessment, emergency response, and detailed studies of incidents involving a wide variety of hazards, including nuclear, radiological, chemical, biological, and natural emissions.
NARAC's primary functions
NARAC has a number of advisory functions. However, the two primary functions are:
- Providing tools and services to federal, state and local governments, that map the probable spread of hazardous material accidentally or intentionally released into the atmosphere.
- Providing atmospheric plume predictions in time for an emergency manager to decide if action is necessary to protect the health and safety of people in affected areas.
Location and operational facilities
Narac is located at the University of California's Lawrence Livermore National Laboratory.
The operational facilities provide by NARAC include:
- A team of research and operational staff with expertise in atmospheric research, operational meteorology, numerical modeling, computer science, software engineering, geographical information systems, computer graphics and hazardous material (radiological, chemical, biological) properties and effects.
- An operations center with uninterruptible power, backup power generators, robust computer systems and a staff on-duty or on-call 24 hours per day and 7 days a week.
- Scientific and technical staff who provide support and training for NARAC tools, as well as quality assurance and detailed analysis of atmospheric releases.
- Links to over 100 emergency operations centers around the United States.
The Emergency Response System: Real time dispersion modeling
The NARAC emergency response central modeling system consists of an integrated suite of meteorological and atmospheric dispersion models.[1][2] The meteorological data assimilation model, ADAPT, constructs fields of such variables as the mean winds, pressure, precipitation, temperature, and turbulence.[3] Non-divergent wind fields are produced by a procedure based on the variational principle and a finite-element discretization. The dispersion model, LODI, solves the 3-D advection-diffusion equation using a Lagrangian stochastic, Monte Carlo method.[4] LODI includes methods for simulating the processes of mean wind advection, turbulent diffusion, radioactive decay and production, bio-agent degradation, first-order chemical reactions, wet deposition, gravitational settling, dry deposition, and buoyant/momentum plume rise.
The models are coupled to NARAC databases providing topography, geographical data, chemical-biological-nuclear agent properties and health risk levels, real-time meteorological observational data, and global and mesoscale forecast model predictions. The NARAC modeling system also includes an in-house version of the Naval Research Laboratory's mesoscale weather forecast model COAMPS.[5]
References
- ↑ Turner, D.B. (1994). Workbook of atmospheric dispersion estimates: an introduction to dispersion modeling, 2nd Edition. CRC Press. ISBN 1-56670-023-X. www.crcpress.com
- ↑ Beychok, M.R. (2005). Fundamentals Of Stack Gas Dispersion, 4th Edition. author-published. ISBN 0-9644588-0-2. www.air-dispersion.com
- ↑ Sugiyama, G., and S. T. Chan (1998), A New Meteorological Data Assimilation Model for Real-Time Emergency Response, 10th Joint Conference on the Applications of Air Pollution Meteorology, Phoenix, Arizona, January, 1998.
- ↑ Ermak, D.L., and J.S. Nasstrom (2000), A Lagrangian Stochastic Diffusion Method for Inhomogeneous Turbulence, Atmospheric Environment, 34, 7, 1059-1068.
- ↑ Hodur, R. M. (1997), The Navel Research Laboratory's Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS), Mon. Wea. Rev., 125, 1414-1430.
See also
- Accidental release source terms
- Air Resources Laboratory
- Air Quality Modeling Group
- Atmospheric dispersion modeling
- Department of Public Safety
- National Center for Atmospheric Research
- University Corporation for Atmospheric Research
External links and sources
- National Atmospheric Release Advisory Center (official website)
- Lawrence Livermore National Laboratory (official website)