CLIMATIC VARIABILITY OF THE RYBINSK RESERVOIR ICE REGIME BASED ON THE NADIR-ORIENTED MICROWAVE RADIOMETER
The paper presents the results of calculations of the climatic variability of the Rybinsk reservoir ice regime based on nadir-oriented microwave radiometers data of satellite TOPEX/Poseidon and Jason-1/2/3 satellites performing altimetry measurements. Analysis of the difference between the maximum and minimum brightness temperatures at three frequencies along 59 and 66 tracks for each cycle showed the following climatic changes of the reservoir ice regime for 1992-2017. Freeze-up occurs later and its start date is shifted at a rate 0.886±0.181 days/year, and the time of the opening of the autopsy is shifted at a rate -0.206±0.046 days/year. The duration of ice formation is reduced over the studied time interval at a rate -1.095±0.189 days/year