Dry deposition to snow in an urban area

✍ Scribed by Jean Muhlbaier Dasch; Steven H. Cadle

• Publisher: Springer Netherlands
• Year: 1986
• Tongue: English
• Weight: 637 KB
• Volume: 29
• Category: Article
• ISSN: 0049-6979
• DOI: 10.1007/bf00158761

✦ Synopsis

Ambient particle and gas concentrations, wet deposition and dry deposition were measured in Warren, MI between December 18, 1983 and April 6, 1984. Dry deposition was measured to various surfaces in a cutoff bucket, including a snow surface, a snow/water surface during melting and a deionized water surface. Dry deposition velocities were calculated for various species from the ratio of the dry flux to the ambient concentrations. The dry deposition velocities measured to a snow surface were 0.082 cm s -1 SO 2, 2.0 for HNO3,0.083 for NH2-, 2.0 for Ca + + and 4.3 for C1 -. The values were not significantly different for a snow/water surface during melting compared to a snow surface. However, higher values of 0.69 cm s -1 for SO2, 6.2 for HNO3, 0.33 for NH~-, and 4.2 for Ca + + were found to a deionized water surface in the spring. These higher values could be due to the higher air temperature, the pH of the liquid or to increased atmospheric mixing during this period.