Estimating seasonal deformations in the earth's crust in correcting for effects on the deter-mination of the earth's rotational parameters

Estimates are made of the vertical deformations in the Earth's crust produced by variable loads on regions having characteristic dimensions of the order of thousands of kilometers, which arise from the development and displacement of cyclones and anticyclones and also from the accumulation of snow and the passage of floods on large rivers. It is found that the total deformation in Siberia can attain 30 cm. It is necessary to correct for the periodic displacements in observational points in the service for determining the Earth's rotational parameters. Suggestions are made on organizing experiments on the deformations.