Practical aspects of measuring dry deposition

TL;DRAbstract

The dry deposition of atospheric trace substances is the transfer of substances to the surface of the earth by all processes excluding those aided directly by precipitation. These include the vertical turbulent transfer of trace gases and fine particles and the gravitational settling of large particles in the lower atmosphere. To address the dry deposition of acidic substances, we need to consider the major sulfur and nitrogen substances, which include SO/sub 2/, HNO/sub 3/ vapor, NO/sub 2/, particulate sulfate, and particulate nitrate. Others often considered are NO, PAN, and organic sulfates. Ozone should be added to this list because it is a substance that is often linked to harmful effects on surface vegetation and materials, and its effects are frequently intermingled with effects of airborne sulfur and nitrogen substances. Here, our discussion will be confined mainly to SO/sub 2/, HNO/sub 3/, NO/sub 2/, particulate sulfur, prticulate nitrate and O/sub 3/. These contaminants do no

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