Environmental Engineering Reference
In-Depth Information
Intensive observational periods
. Non-routine measurements (e.g., vertical profiles,
precursors, etc.) are occasionally available from field campaigns. Such observations
are usually short term and tailored to specific study objectives, and so they cannot
form the basis of general long-term evaluations. However, non-routine measure-
ments enable evaluation of model parameterizations at a level of detail not
possible with routine network observations. Comparisons of predicted particle size
distributions with impactor measurements from a field study in California are
shown in
Fig. 7.
Predicted distribution peak heights are in reasonable agreement
with observations, but modeled distributions are too wide and incorrectly indicate
a significant portion of the accumulation mode at aerodynamic diameter >2.5 μm.
Fig. 7.
Modeled and simulated particle size distribution at ANGI site
