Variability of Refractive Index Gradient in the Atmospheric Boundary Layer in the East Regions of Russia
N. Ts. Gomboev
On the basis of 10-year series of observations at 30 stations in Eastern Siberia and Far East, features are analyzed of annual and diurnal changes in vertical gradient of refractive index gn, and of its rms deviation σin the lower 900-m layer of the atmosphere. It is found that the main type of annual variations of gn and σis represented by the annual cycle with two maxima (in winter and summer) and two minima (in spring and fall). The annual cycle with a single high winter maximum of gn and σis, for the first time, revealed in the northeastern border region of Russia. The largest amplitude of gn annual cycle is observed in the northeastern part of the area. The diurnal variations of gn exhibit maximum amplitudes in spring and summer; diurnal changes of σare not pronounced but in several stations in the northern part of the area.