RT null T1 A Handbook to Estimate Climatological Concentration Deposit and Horizontal Fluxes of Pollutants on a Regional Scale - Technical Report A1 Monitoring and Assessment Research Centre, A2 Machta, L. K1 pollutant K1 air pollutant SN 090591810X YR 1979 FD 1979 LK https://wedocs.unep.org/handle/20.500.11822/22367 UL https://wedocs.unep.org/handle/20.500.11822/22367 NO It is now recognized that the air transport of pollutants to distances outside of urban and local industrial areas must be considered for a number of environmental problems. Two general types of problems arise.. In the first, the concentration, deposition rate, or horizontal flux (flux through a vertical plane) is required for a specific time: a given hour, day, year, etc. For the resolution of such problems the weather data for that time must be used. In the second type, the average or typical concentration, deposition rate or horizontal flux is required. In this case, average climatic conditions should be used. The present handbook provides calculation procedures only for the second or the climatological properties of pollution after travel to distances of about 100 to 1.000 kilometres (km). DS UN Environment Document Repository RD Sep 20, 2026