The Air Resources Laboratory’s (ARL) mission is to improve the ability of the Nation to protect human and ecosystem health and to support a vibrant economy through advanced …

ARL’s atmospheric transport and dispersion research provides critical modeling and observation data to understand how, where, and when chemicals and materials are dispersed through the …

The Atmospheric Composition and Emissions Research performed in the Air Resources Laboratory provides support for atmospheric forecast models run operational-ly by NOAA’s …

ARL measures a number of different variables (wind speed, temperature, etc.,) to characterize the atmospheric boundary layer. This data on the surface, and near surface, weather and climate …

ARL scientists perform activities to understand the main processes that drive the transport and dispersion of harmful substances in the atmosphere, to improve the quality of our modeling …

Developed and maintained by ARL, HYSPLIT is the core engine of ARL’s transport-dispersion modeling activities and it is one of the most widely used models for atmospheric trajectory and …

HYSPLIT continues to be one of the most extensively used atmospheric transport and dispersion models in the atmospheric sciences community. A common application is a back trajectory …

Feb 27, 2025 · HYSPLIT v9 approved for implemented into operations by the National Center for Environmental Protections (NCEP) This version provides significant enhancements, including …

Modeling the fallout from stabilized nuclear clouds using the HYSPLIT atmospheric dispersion model – Rolph, G.D., F. Ngan, and R.R. Draxler (2014), Journal of environmental radioactivity …

Atmospheric Turbulence & Diffusion Division (ATDD) 456 South Illinois Avenue Oak Ridge, TN 37830. Phone: 865-576-1233; E-mail: [email protected]; Map