摘要：Urban air pollution estimation as well as greenhouse emissions rely on
the preparation of good source inventories. Depending on the desired temporal
and geographical scale of such inventories, two complementary calculations
are generally proposed to estimate these emissions: the top-down and the
bottom-up approach. This paper is divided in two sections, in the first part,
a brief report of both methods are presented, applied to the mobile urban
sources, which is then used to prepare a gridded emission pattern. In the second
part, an urban area source dispersion algorithm is presented to compute the
ambient concentration using the calculated gridded emission pattern for any
particular meteorological conditions. The proposed method calculates the
ambient concentration of the entire area, by convolving the response of one
unit cell with the gridded emission pattern of the area under study.
This method is computationally more efficient than applying the standard
regulatory algorithms for any area shape. The results are then applied on a
geographical information system.
