[4] The ARL studies processes and develops models relating to weather, emergency management, climate and air quality, including the transport, dispersion, transformation and removal of pollutants from the ambient atmosphere.

ARL provides scientific and technical advice to elements of NOAA and other Government agencies on atmospheric science, environmental problems, emergency assistance (Homeland Security), and climate change.

ARL's stated goal is to improve the Nation's ability to protect human and ecosystem health while also maintaining a vibrant economy.

The headquarters group also improves the understanding of climate variability and trends, the exchange of pollutants between the air and land, and the sources of mercury that influence sensitive ecosystems.

As depicted in the adjacent organization diagram, the ARL operates with four research divisions in Idaho Falls, Idaho; North Las Vegas, Nevada; Oak Ridge, Tennessee; and Research Triangle Park, North Carolina: