Ice and SnowIce and SnowЛед и снег2076-67342412-3765The Russian Academy of Sciences68839610.31857/S2076673425020037FPRMPOGlaciers and ice sheetsЛедники и ледниковые покровыResearch ArticleIsotopic parameters of the Mizhirgi River (Caucasus): four-component hydrograph separationИзотопные параметры стока р. Мижирги (Кавказ): четырёхкомпонентное расчленение гидрографаChizhovaYu. N.ЧижоваЮ. Н.
Russian Federation
eacentr@yandex.ruKrekovaA. D.КрековаА. Д.
Russian Federation
eacentr@yandex.ruKutuzovS. S.КутузовС. С.
United States

School of Earth Sciences

Школа наук о Земле

eacentr@yandex.ruMikhalenkoV. N.МихаленкоВ. Н.
Russian Federation
eacentr@yandex.ruLavrentievI. I.ЛаврентьевИ. И.
Russian Federation
eacentr@yandex.ruVorobievM. A.ВоробьевМ. А.
Russian Federation
eacentr@yandex.ruVinogradovaM. V.ВиноградоваМ. В.
Russian Federation
eacentr@yandex.ruInstitute of Geography Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of ScienceИнститут геологии рудных месторождений, петрологии, минералогии и геохимии РАНInstitute of Geography, Russian Academy of ScienceИнститут географии РАНHigher School of EconomicsВысшая школа экономикиThe Ohio State UniversityУниверситет штата Огайо040920256522182332807202528072025Copyright ©; 2025, Chizhova Y.N., Krekova A.D., Kutuzov S.S., Mikhalenko V.N., Lavrentiev I.I., Vorobiev M.A., Vinogradova M.V.Copyright ©; 2025, Чижова Ю.Н., Крекова А.Д., Кутузов С.С., Михаленко В.Н., Лаврентьев И.И., Воробьев М.А., Виноградова М.В.2025Chizhova Y.N., Krekova A.D., Kutuzov S.S., Mikhalenko V.N., Lavrentiev I.I., Vorobiev M.A., Vinogradova M.V.Чижова Ю.Н., Крекова А.Д., Кутузов С.С., Михаленко В.Н., Лаврентьев И.И., Воробьев М.А., Виноградова М.В.http://creativecommons.org/licenses/by/4.0https://journals.eco-vector.com/2076-6734/article/view/688396

The processes of river flow formation in the glacier basin were studied using stable isotope geochemistry methods. During the ablation period, isotopic and hydrochemical characteristics of the components involved in the formation of river runoff were determined for the Mizhirgi River within the glacial basin, and isotopic dissection of the hydrograph was performed. The study was performed for a short observation period at a hydrological post in the middle of the ablation season from July 6th to July 16th of 2021. Samples of Mizhirgi River water at gouge in 750 m from the glacier tongue were collected as well as precipitation and glacial ice samples on the tongue. Samples of glacial ice were also collected near the Katyn-Tau summit at an altitude of 4750 m in the upper part of the Bezengi Wall, obtained by ice core drilling. The use of two isotopic and one hydrochemical tracer showed the promise of using these methods to study glacier melt patterns. The share of glacial ice melt ranged from 39 to 59%, the share of snow melt water near the feeding boundary varied from 8 to 27%, and an insignificant contribution was made by direct precipitation, which entered the river flow mainly by infiltration through the ground.

Изучены изотопные параметры стока в бассейне ледника Мижирги в середине периода абляции, установлены изотопные и гидрохимические характеристики компонент стока – тающего льда на языке ледника, снега лавинных снежников, ледникового льда и снежного покрова в области питания. Выполненное четырёхкомпонентное расчленение стока по двум изотопным (δ18О, d-exc) маркерам и величине минерализации показало возможность изучения структуры таяния в высокогорном ледниковом бассейне. Эта возможность обусловлена отличием величин дейтериевого эксцесса снежного покрова, формирующегося в зимний и летний сезоны в области аккумуляции ледников Безенгийского узла оледенения.

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