Ariel Stein Appointed ARL Director May 9, 2022 NOAA has announced Dr. Ariel Stein is appointed the Director, Air Resources Laboratory (ARL) effective May 8, 2022. Dr. Stein is currently Director of NOAA’s Global Monitoring Laboratory. Ariel has agreed to serve as Acting Director of NOAA’s Global Monitoring Laboratory (GML) until the permanent GML position…
Air Resources Lab News ARL and EPA improve the Federal government’s response to nuclear incidents impacting the US July 3, 2025 Nuclear accidents happen more often than many people realize across the U.S. and world. NOAA and EPA signed a formal agreement to work together in improving the nation’s ability to respond to these accidents.…
ARL Leadership ARL Director: Dr. Ariel Stein Dr. Ariel Stein is currently ARL Director. Dr. Stein has extensive experience working with atmospheric transport, dispersion, and photochemical models. Previously, Ariel was a Supervisory Physical Scientist before becoming Acting Deputy Director of NOAA’s Air Resources Laboratory. Ariel has an in-depth understanding of hybrid dispersion modeling techniques including…
2021 NOAA Administrator Awards Recognize ARL Efforts in Atmospheric Research October 29, 2021 Several ARL projects and accomplishments were recognized in the NOAA Administrator’s awards during a ceremony on October 27, 2021, including two bronze medals. The highest honor award granted by the NOAA Administrator, the Department of Commerce Bronze Medal recognizes federal employees for superior performance…
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Atmospheric Transport and Dispersion 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 tools, and to assess the uncertainties and applicability of those tools. In addition, investigations of the transport and dispersion of chemicals in the…
Transport-Dispersion 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 dispersion calculations in the US and internationally. HYSPLIT is a complete system for computing simple air parcel trajectories as well as complex transport, dispersion,…
About ARL NOAA’s Air Resources Laboratory (ARL) conducts research on the lowest part of the atmosphere, the boundary layer, the area where we live and breathe. World-class research on the chemistry and physics of the boundary layer contributes to accurate regional and global predictions of weather and air quality, as well as climate variability. ARL…
HYSPLIT HYSPLIT models simulate the dispersion and trajectory of substances transported and dispersed through our atmosphere, over local to global scales. HYSPLIT is a complete system for computing simple air parcel trajectories, as well as complex transport, dispersion, chemical transformation, and deposition simulations. HYSPLIT continues to be one of the most extensively used atmospheric transport and…
HYSPLIT Publications, Meteorological Data, and References to Applications The following references should be used if publishing a paper using the HYSPLIT model in general: Stein, A.F., Draxler, R.R, Rolph, G.D., Stunder, B.J.B., Cohen, M.D., and Ngan, F., (2015). NOAA’s HYSPLIT atmospheric transport and dispersion modeling system, Bull. Amer. Meteor. Soc., 96, 2059-2077, http://dx.doi.org/10.1175/BAMS-D-14-00110.1 Draxler, R.R.,…