@PhDThesis{Setzer:1982:StAiPo,
               author = "Setzer, Alberto Waingort",
                title = "The study of air pollution plumes with imaging techniques",
               school = "Purdue University",
                 year = "1982",
                month = "1982",
             keywords = "ESTUDOS INTEGRADOS DO MEIO AMBIENTE, POLUICAO DO AR, IMAGENS 
                         LANDSAT, FUMACA, PARAMETROS METEOROLOGICOS.",
             abstract = "This work examines the possibilities of atmospheric dispersion 
                         studies through the use of small scale images of air pollution 
                         plumes, particularly through the use of Landsat imagery. The major 
                         points are: 1)A historical description of the uses of imaging 
                         techniques in atmospheric and plume dispersion studies. 2)A review 
                         of dispersion theories used with smoke and air pollution 
                         photography. 3)A study of a plume (up to 200 km)spreading over the 
                         ocean and visible in Landsat images is developed. Sixteen cases of 
                         this plume indicated that its shape and length depend mainly on 
                         the wind speed. Long plumes were characteristics of winds stronger 
                         than 5 m/s and spread within an angle of 5 to 7.5 . An association 
                         with Reynolds' (1883)experiments is made in spite of a difference 
                         of six orders of magnitude between the length of the plumes in 
                         these two works. Pasquill's (1961)horizontal dispersion 
                         coefficients were within an expected variation when compared to 
                         the values measured from the images. Nevertheless, this variation 
                         is associated with limitations in the dispersion equation and in 
                         the dispersion coefficients. 4)A study of Landsat multi-spectral 
                         data showed that plumes over water have their own spectral 
                         signature and that they can be located with an unsupervised 
                         classification technique ({"}Cluster{"}). 5)The remote sensing of 
                         plumes is suggested as a viable tool for environmental problems 
                         such as acid rain and longrange transport of air pollutants. The 
                         use of existing (as well as future)satellite images is a virtually 
                         unexplored source of data for environmental studies.",
         englishtitle = "O estudo de plumas de polui{\c{c}}{\~a}o do ar com t{\'e}cnicas 
                         de imagem",
                label = "1079",
             language = "en",
           targetfile = "INPE 6974.pdf",
        urlaccessdate = "07 maio 2024"
}