THE POSSIBILITY OF USING THE TRANSPARENCY METHOD TO DETERMINE THE MICROSTRUCTURE OF AN ATMOSPHERIC AEROSOL,

摘要

A discussion is presented on the application of the visibility method in calculating the spectra of the particles in a dispersed system in the free atmosphere, i.e.,to determine the size spectra of atmospheric aerosols. The first section of the paper deals with the difficulties encountered in using the method, i.e.,determination of the polydispersed scattering coefficient for the significant IR and short wavelengths,in an atmosphere in which radiation is attenuated by absorption by gaseous components and by scattering,and along both off-vertical and horizontal paths. Results obtained by both American and Soviet specialists are compared. The second section deals with problems encountered in making actual horizontal measurements of atmospheric aerosol visibility in the visible,near UV,and IR ranges over paths 5-10km above the earth. A procedure is presented for determining visibility. The flux of radiation from a source located in the focus of the first mirror passes through the atmospheric layer. (Author)