By Anton Eliassen (auth.), C. De Wispelaere (eds.)
In 1969 the North Atlantic Treaty association demonstrated the Committee at the demanding situations of contemporary Society. pollution was once from the beginning one of many pri9rity difficulties less than research in the framework of the pilot reviews undertaken through this Committee. The association of a every year symposium facing pollution modeling and its program is among the major actions in the pilot examine relating to pollution. After being geared up for 5 years by way of the U.S. and for 5 years by means of the Federal Republic of Germany, Belgium, represented by way of the best Minister's workplace for technological know-how 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 geared up by means of the best Minister's place of work for technological know-how coverage Programming, Belgium, and the Ministere de l'Environnement, France. The convention was once attended through one hundred twenty individuals and forty five papers were offered. The remaining ses sion of the thirteenth I. T. M. has been attended by means of Mr. Alain Bombard, French Minister of our environment. The individuals of the choice committee of the thirteenth I. T. M. have been A. Berger (Chairman, Belgium), W. K1ug (Federal Republic of Germany), okay. 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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0. ' " Fig. 11. Calculated concentrations of nitrogen compounds (pg m- 3 ) for January 1977. a. N02 concentration 49 LAGRANGIAN LONG RANGE AIR POLLUTION MODEL ~ "" ....... : .. "\"<:~""""""" ......... 1 " Fig. 11. Calculated concentrations of nitrogen compounds (~g m- 3 ) for January 1977. b. NO concentration 50 C. M. BHUMRALKER ET AL. ~. :> .... :\............... Fig. 11. Calculated concentrations of nitrogen compounds (pg m- 3 ) for January 1977. c. , , i, , ·· ·.......... - ", 'lo.. " )0 , 1,,:' •• -.!.
46 EQUILIBRATE NO AND N0 2 CALCULATE CHANGES IN CONCENTRATION CALCULATE NEW CONCENTRATIONS EQUILIBRATE NO AND N0 2 CONTINUE ENAMAP AS BEFORE Fig. 9. The steps used in calculating changes in nitrogen compounds. To illustrate the computations, we have applied the algorithm (without deposition processes) to a hypothetical puff having an initial concentration of 100 parts of NO and N0 2 • The amount of each of the five compounds versus time is shown by the curves in Fig. 10. ) The relative amounts of NO and N02 change markedly at the transition from day to night, or night to day.
BRUMRALKAR F. FANAKI No this is our first attempt to incorporate NO treatment in the Lagrangian. In determining the vertical location of the sources do you use the physical height of the exit or do you use or specific plume rise formula? M. BHUMRALKAR The model is rather coarse both in time and space. So we do not use any specific plume rise formula. Also, the emission data used do not provide all the detailed information. We only know the point and area source emissions from grids each of which has a size of 70 km x 70 km.
Air Pollution Modeling and Its Application III by Anton Eliassen (auth.), C. De Wispelaere (eds.)