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 atmospheric sciences and technologies. ARL’s research focus is on the surface of the Earth from a few feet below the soil up to 2-3 miles in the atmosphere, known as the boundary layer, which has a direct impact on people’s health and safety, business, and the environment. ARL studies the physical and chemical processes that occur in the boundary layer, on time scales spanning a few hours to several years.

ARL studies the mixing, exchange, and transformation of energy, moisture, trace gases and particles and contributes inputs to meteorological models and forecast operations that are vital in improving weather, climate and air quality forecasts. Primary applications include emergency response, homeland security, air quality, weather forecasts, climate outlooks, commerce and transportation. ARL’s vision is to effectively protect people, the environment, and commercial activities from atmospheric risks using the best available scientific understanding of boundary layer processes.

Primary Research Areas

Surface Atmosphere Exchange

  • Research processes and variables controlling heat and water vapor exchanges between land and atmosphere

Atmospheric Transport and Dispersion

  • Research main processes that drive transport and dispersion in the atmosphere
  • Improve the quality of and assess uncertainties/applicability of modeling tools

Boundary Layer Characterization

  • Improve accuracy of atmospheric models and other forecast and prediction tools to better understand the atmospheric boundary layer 
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NOAA’s HYSPLIT model, a key safety tool for emergency managers

June 11, 2026

Local emergency managers plan ahead for public safety during large events, modifications to HYSPLIT are helping U.S. cities plan around World Cup events.

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Millions of East Coast visitors provide unique opportunity for NOAA

May 27, 2026

With millions of visitors expected this summer for the FIFA World Cup games, NOAA realized there is an opportunity for a real-world experiment to study urban air quality management, improve atmospheric models and support emergency management.

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NOAA Research Assistant Administrator visits the Air Research Lab

May 11, 2026

ARL planned hands-on activities demonstrating some of the lab’s work during a visit by Dr. Steven Thur, Assistant Administrator for NOAA Oceanic and Atmospheric Research on Wednesday.