Statistical Analysis of the Water Vapor Content in North Caucasus and Crimea

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Abstract
Results of studying the precipitable water vapor content in the atmosphere column for Terskol Peak (the Elbrus region), Kislovodsk city, Nauchny settlement (Crimea), Shaki city (Azerbaijan), and Khunzakh settlement (Dagestan) are presented. The comparative analysis of variations in the precipitable water vapor content estimated by data of measurements at GNSS stations and ERA-5 reanalysis is performed. Using the ERA-5 reanalysis makes it possible to reveal new sites promising for location of millimeter/submillimeter telescopes. With allowance for the comparatively low total cloud cover, Rutul and Agul raions of mountainous Dagestan (Mt. Khorai (3521 m) and Mt. Karakh (2876 m) with surroundings, as well as Mt. Sindaku (2849 m) with surroundings) are most promising sites for the location of the Russian millimeter/submillimeter telescope in North Caucasus.

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