Combining biology, chemistry, and meteorology in modeling and measuring dry deposition

摘要: The range of chemical, biological, and meteorological processes contributing to the net exchange trace chemical species between atmosphere underlying surface is examined, in context a multiple-resistance model. For those known be always depositing, resistance model provides means formulate appropriate deposition velocities convenient manner; however, extension other situations not straightforward. Field data indicate that approach for application assess dry ozone sulfur dioxide, but as nitrogen dioxide. Data obtained over agricultural crops suggest canopy factors frequently dominate overall process. A trial program measurement based on parameterized was initiated late 1984, has demonstrated shortcomings under-standing concerning several factors, most importantly roles emissions wetness, scaling-up laboratory results describe vegetative canopies.