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Atmospheric and Oceanic Optics

2017 year, number 5

Estimates of the contribution of midges in the extinction coefficient of optical radiation for background conditions of summer in Western Siberia

N.N. Shchelkanov, V.N. Uzhegov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: атмосфера, коэффициент ослабления, гнус, лето, Западная Сибирь, atmosphere, extinction coefficient, midges, summer, Western Siberia

Abstract

The first estimates of a contribution of midges into extinction of optical radiation for background conditions of summer in Western Siberia are received. Values of the midges extinction coefficient received on the basis of experimental data on a wavelength of 1.06 mm change from 0 to 0.14 km-1. The estimate of the mean value of midges extinction coefficient in visible and infrared regions makes 0.07 km-1. It is shown that the relative contribution of midges into extinction coefficient of optical radiation in the 0.5-16 mm is essential and changes on average from 26 to 63%.