Air Pollution And Warm Fog Modification

Download or read book Air Pollution and Warm Fog Modification written by Alan I. Weinstein and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through a series of simple calculations on monodispersed fogs, it is shown that atmospheric air pollutants in the form of cloud condensation nuclei (CCN) contribute to a lowering of the visibility and, thereby, seriously inhibit the visibility-improving capability of some evaporation techniques of warm fog modification. In extreme pollution, where the CCN counts are in excess of 1000/cc and the initial visibility is, therefore, very low, those techniques that only depress relative humidity a few percent, for example, hygroscopic particle seeding, could be rendered almost powerless in improving visibility to practically useful levels. Those fog dispersal techniques that of practical necessity generally depress the relative humidity by more than five % such as thermal fog dispersal, are not so seriously hampered by atmospheric pollutants. (Modified author abstract).