VELOCITY OF RADIO-WAVES IN GLACIERS AS AN INDICATOR OF THEIR HYDROTHERMAL STATE, STRUCTURE AND REGIME

The results of measurements of radio-wave velocities (RWV) by wide-ang le reflection (WAR) methods in the temperate Abramov Glacier in the Al ai Mountain Ridge and the ''two-layered'' sub-polar Fridtjovbreen and Hansbreen on Svalbard using a low-frequency (2-13 MHz) radar are consi dered and discussed. The experimental data obtained and the data from the literature show that the values of RWV could be a good indicator o f the hydrothermal state of glaciers. As such, these data enable the i dentification of cold, temperate and transitional (two-layered) glacie rs, and can be used for estimation of the water content in glaciers an d changes in the hydrothermal state.