Atmospheric deposition Chesapeake Bay Glossary Glossary and Key Word List Definition: The process by which airborne pollutants settle onto land or water. "Wet deposition" refers to pollutants that fall to the earth while attached to raindrops or snowflakes. "Dry deposition" refers to pollutants that fall to the earth without precipitation. Atmospheric Deposition Urban Watershed Management Research Terminology Glossary and Key Word List Definition: The settling of particulates from the atmosphere onto water or land surfaces in the absence of precipitation. Atmospheric Deposition EPA EV-Natural Environments-Natural Phenomena Taxonomy Definition 1: The transfer of substances from the air to the surface of the Earth, either in wet form (rain, fog, snow, dew, frost, hail) or in dry form (gases, aerosols, particles). [USGS National Water-Quality Assessment (NAWQA) Program Glossary] Definition 2: The settling of particulates from the atmosphere onto water or land surfaces in the absence of precipitation. [Urban Watershed Management Research Terminology] Definition 3: The settling of particulates from the atmosphere onto water or land surfaces in the absence of precipitation.[Urban Watershed Glossary] Definition 4: The process by which airborne pollutants settle onto land or water. "Wet deposition" refers to pollutants that fall to the earth while attached to raindrops or snowflakes. "Dry deposition" refers to pollutants that fall to the earth without precipitation. [Chesapeake Bay Glossary]