Air Pollution Modeling and Its Application III by Anton Eliassen (auth.), C. De Wispelaere (eds.)

By Anton Eliassen (auth.), C. De Wispelaere (eds.)

In 1969 the North Atlantic Treaty association proven the Committee at the demanding situations of recent Society. pollution was once from the beginning one of many pri9rity difficulties less than examine in the framework of the pilot reports undertaken by way of this Committee. The association of a every year symposium facing pollution modeling and its software is among the major actions in the pilot research on the subject of pollution. After being geared up for 5 years by way of the USA and for 5 years by way of the Federal Republic of Germany, Belgium, represented by way of the major Minister's place of work for technology coverage Programming, turned in charge in 1980 for the association of this symposium. This quantity comprises the papers offered on the thirteenth Inter­ nationwide Technical assembly on pollution Modeling and its Appli­ cation held at lIe des Embiez, France, from 14th to seventeenth September 1982. This assembly used to be together prepared by means of the top Minister's place of work for technological know-how coverage Programming, Belgium, and the Ministere de l'Environnement, France. The convention used to be attended through one hundred twenty contributors and forty five papers were provided. The last ses­ sion of the thirteenth I. T. M. has been attended by way of Mr. Alain Bombard, French Minister of our surroundings. The contributors of the choice committee of the thirteenth I. T. M. have been A. Berger (Chairman, Belgium), W. K1ug (Federal Republic of Germany), ok. Demerjian (United States of America), L. Santomauro (Italy), M. L. Williams (United Kingdom), H. Van Dop (The Netherlands), H. E. Turner (Canada), C.

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Calculated concentrations of nitrogen compounds (pg m- 3 ) for January 1977. e. 3 Flux out of grid region Table 2. Budget of the enanox model for illinois nitrogen emissions for January 1977 (Units Kilotons) W C11 r om o ~ oZ r C -I or "'0 ~ ::IJ m G) Z }> ::IJ G) Z o r » z G) Z }> ::IJ }> G) r 54 C, M, BHUMRALKER ET AL. The budget of the model can be seen from the computations for Illinois (Table 2). ) Table 2 shows that the principal product of the simulation is RN0 3 , followed by nitrates and PAN.

2. The eastern North American model domain. 37 LAGRANGIAN LONG RANGE AIR POLLUTION MODEL OUTLINE OF THE MODEL The functional parts of ENAMAP are shown in Fig. 1. These different parts are typical of those used in a Lagrangian model, which tracks pollution puffs emitted over a grid at specified intervals (such as 12 hours). Each puff is normally tracked for 2 to 3 days using 3-hour time steps, until the puff becomes very diffuse or passes out of the domain. As a puff travels with the winds, it loses matter by dry and wet deposition processes.

S O• O. O. O. 0 O. o. O. S O. 0 o. O. O• O. t O. 0 o. 0 27 O. O. 0 o. 4 O. 0 O. O. O. 5 o. 0 D. O. 0 o. 0 DEPOSITIONS MITKIII RECEPTOR lEG 10115 20 22 ZJ 24 zs 26 21 O. 0 O. 5 D. O. 0 O. o. O. o. 0 O. o. S o. 0 o. 0 O. 0 •2 D. 0 o• O. 2 o. 0 21 11 •• o. O. 2 O. J O. 0 O. 7 o. 0 O. O. 0 O. O• O• O. 2 O. J O. 0 O. O• O. O. 1 O. 1 10 Table 1. Example of computed sulfur deposition due to interregional ex-changes of airborne sulfur in January 1977 (Units are KTON Sulfur) • s:: » :- -I :D '"mm :D » r C ::J: III ("') s:: N """ 43 LAGRANGIAN LONG RANGE AIR POLLUTION MODEL NITROGEN CHEMISTRY K = 2 (Day), K = 50 (Night) kn N0 2 ..

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