Tyukov Denis Vladimirovich RussiaSaratovSaratov State University, 83, Astrakhanskaya Str., Saratov, 410012, Russiaden1sov.an@yandex.ru Author's articles The use of Earth remote sensing data in the study of mountain glaciers (on the example of the Alibek glacier in Karachay-Cherkessia)