Pavlyukevich Ekaterina ekaterina.kornilova.hydro@gmail.com 0000-0002-8416-5843 Institute of Water Problems, Russian Academy of Sciences IWP RAS http://www.iwp.ru/ https://ror.org/01rmxff98 Popovnin Viсtor begemotina81@gmail.com Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Gubanov Afanasy afanasygubanov@gmail.com 0009-0007-1145-5878 Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Ivanov Viсtor viktoro.1998@yandex.ru Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Averina Alena averinaa101@gmail.com Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Ibraev Kirill kic.alen30@gmail.com Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Voevodina Anastasia annaanastasija.tavak@gmail.com Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Durmanov Ivan durmivan@yandex.ru Institute of Water Problems IWP RAS http://www.iwp.ru/ https://ror.org/01rmxff98 Khomiakova Victoria curcuma162@gmail.com Arctic and Antarctic Research Institute, St. Petersburg AARI http://www.aari.nw.ru/default_en.asp https://ror.org/051w7zc95 Chizhova Julia N eacentr@yandex.ru 0000-0003-0539-5796 Institute of Geography, Russian Academy of Sciences, Moscow IGRAN https://ror.org/00q976b76 Kozachek Anna V kozachek@aari.ru 0000-0002-9704-8064 Arctic and Antarctic Research Institute, St. Petersburg AARI http://www.aari.nw.ru/default_en.asp https://ror.org/051w7zc95 Ekaykin Alexey A ekaykin@aari.ru 0000-0001-9819-2802 Arctic and Antarctic Research Institute, St. Petersburg AARI http://www.aari.nw.ru/default_en.asp https://ror.org/051w7zc95 Tsyplenkov Anatoly atsyplenkov@gmail.com Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 Zheleznova Irina irik88@mail.ru Lomonosov Moscow State University MSU http://www.msu.ru/en/ https://ror.org/010pmpe69 2026 Hydrological, meteorological and glaciological observations and isotopes sampling results during 2021-2024 (glaciological data from 2019-2020 included) at Djankuat Glacier Station in the North Caucasus, Russia dataset bundled publication https://doi.org/10.1594/PANGAEA.989847 2026-02-19T10:17:45 This is the second update of a dataset comprising long-term complex glaciological, hydrological, and meteorological observations, including isotope sampling, from the highly underreported alpine zone of the North Caucasus, described in Rets et al., 2019 (https://doi.org/10.5194/essd-11-1463-2019). The data were collected in the Djankuat research basin (9.1 km², elevations of 2500–4000 m, 30% glacier cover). The Djankuat glacier, located in the basin under study, is a World Meteorological Organization reference glacier with a mass-balance record exceeding 50 years. The original dataset covers 2007-2017 (https://doi.org/10.1594/PANGAEA.894807), with the first update for 2019-2020 (https://doi.org/10.1594/PANGAEA.940839). This second update extends the series to 2021-2024. It also includes previously unpublished data of glacier ablation, snow height, and snow density measurements in the spatially distributed net for the 2019-2020 period. A significant enhancement since 2021 is the operation of an additional year-round hydrological gauging station on the Djankuat River 1 km downstream of the main one. The dataset includes results from annual measurements of snow thickness and density; snow and ice melt dynamics; water runoff, conductivity, turbidity, temperature, δ¹⁸O, and δ²H at gauging stations; isotopic sampling of precipitation, snow, ice, firn, and groundwater; and high-resolution meteorological data (precipitation, air temperature, humidity, radiation, pressure, wind). The observations were primarily conducted during the summer ablation seasons (June-October), with gradient and eddy covariance measurements for turbulent flux estimation. This dataset is invaluable for developing and validating hydrological, glaciological, and meteorological models, assessing climate change impacts on mountain hydrology, and applying isotopic methods in high-altitude research. The dataset will be periodically updated. The research was supported by Russian Science Foundation, grant no. 25-77-10049 (in part of hydrological observations), grant no. 22-17-00133 (in part of glaciological observations), and was carried out under the Governmental Order to Water Problems Institute, Russian Academy of Sciences, subject no. FMWZ-2025-0003 (in part of meteorological observations). Rets Ekaterina P retska@mail.ru 0000-0002-4505-1173 Popovnin Viktor V begemotina@hotmail.com Toropov Pavel A tormet@inbox.ru Smirnov Andrew M Tokarev Igor V 0000-0003-1095-0731 Chizhova Julia N eacentr@yandex.ru 0000-0003-0539-5796 Budantseva Nadine A nadin.budanceva@mail.ru Vasil'chuk Yurij K vasilch_geo@mail.ru 0000-0001-5847-5568 Kireeva Maria B kireeva_mb@mail.ru 0000-0002-8285-9761 Ekaykin Alexey A ekaykin@aari.ru 0000-0001-9819-2802 Veres Arina N veres@aari.ru Aleynikov Alexander A Frolova Natalia L 0000-0003-3576-285X Tsyplenkov Anatolii S 0000-0003-4144-8402 Poliukhov Aleksei A 0000-0001-6336-3376 Chalov Sergey R 0000-0002-6937-7020 Aleshina Maria A aleshina_mashusha@rambler.ru 0000-0001-8416-7657 Kornilova Ekaterina D ekaterina.kornilova.hydro@gmail.com 0000-0002-8416-5843 2019 Djankuat glacier station in the North Caucasus, Russia: a database of glaciological, hydrological, and meteorological observations and stable isotope sampling results during 2007–2017 journal article Earth System Science Data 11(3) https://doi.org/10.5194/essd-11-1463-2019 1463-1481 Rets Ekaterina P retska@mail.ru 0000-0002-4505-1173 Popovnin Viktor V begemotina@hotmail.com Toropov Pavel A tormet@inbox.ru Smirnov Andrew M Tokarev Igor V 0000-0003-1095-0731 Chizhova Julia N eacentr@yandex.ru 0000-0003-0539-5796 Budantseva Nadine A nadin.budanceva@mail.ru Vasil'chuk Yurij K vasilch_geo@mail.ru 0000-0001-5847-5568 Kireeva Maria B kireeva_mb@mail.ru 0000-0002-8285-9761 Ekaykin Alexey A ekaykin@aari.ru 0000-0001-9819-2802 Veres Arina N veres@aari.ru Aleynikov Alexander A Frolova Natalia L 0000-0003-3576-285X Tsyplenkov Anatolii S 0000-0003-4144-8402 Poliukhov Alexey aeromsu@gmail.com Chalov Sergey R 0000-0002-6937-7020 Aleshina Maria A aleshina_mashusha@rambler.ru 0000-0001-8416-7657 Kornilova Ekaterina D ekaterina.kornilova.hydro@gmail.com 0000-0002-8416-5843 2018 Glaciological, hydrological, meteorological observations and isotopes sampling results during 2007-2017 at Djankuat Glacier Station in the North Caucasus, Russia dataset publication series https://doi.org/10.1594/PANGAEA.894807 Rets Ekaterina P retska@mail.ru 0000-0002-4505-1173 Popovnin Viktor V begemotina@hotmail.com Toropov Pavel A tormet@inbox.ru Tsyplenkov Anatoly atsyplenkov@gmail.com Kornilova Ekaterina D ekaterina.kornilova.hydro@gmail.com 0000-0002-8416-5843 Durmanov Ivan durmivan@yandex.ru Zheleznova Irina irik88@mail.ru Aleshina Maria A aleshina_mashusha@rambler.ru 0000-0001-8416-7657 Poliukhov Alexey aeromsu@gmail.com Gubanov Afanasy afanasygubanov@gmail.com 0009-0007-1145-5878 Kireeva Maria B kireeva_mb@mail.ru 0000-0002-8285-9761 Ekaykin Alexey A ekaykin@aari.ru 0000-0001-9819-2802 Kozachek Anna V kozachek@aari.ru 0000-0002-9704-8064 Veres Arina N veres@aari.ru Khomiakova Victoria curcuma162@gmail.com Yarinich Yulia julia.yarinich@yandex.ru 2022 Hydrological, meteorological observations and isotopes sampling results during 2019-2020 at Djankuat Glacier Station in the North Caucasus, Russia dataset bundled publication https://doi.org/10.1594/PANGAEA.940839 42.72625 43.20378 42.45476 43.21277 42.92908216347206 42.99159065630265 2018-08-29T00:00:00 2024-10-17T00:00:00 Russian Academy of Sciences RAS https://doi.org/10.13039/501100002674 FMWZ-2025-0003 Governmental Order to Water Problems Institute Russian Science Foundation https://doi.org/10.13039/501100006769 22-17-00133 Progressive escalation of the reduction of ice and water resources in the Caucasus: reality or myth? https://rscf.ru/en/project/22-17-00133/ Russian Science Foundation https://doi.org/10.13039/501100006769 25-77-10049 Outburst hazard assessment of mountain glacial lakes of the Central Caucasus under climate change using modelling and machine learning methods 9 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Date/Time local | Automated weather station (AWS) | Air temperature at 2 m height | T2 | Dew/frost point | TdTdTd | Humidity, relative | RH | Wind speed, hourly mean | ff hour m | Wind speed, maximum | ff max | Precipitation | Precip | Calculated from the Water level (H) measurements, using dependency Q=f(H) | Discharge | Q | Calculated | Conductivity, electrical | EC | Electrical conductivity meter | Temperature, water | Temp | Turbidity (Nephelometric turbidity unit) | Turbidity | Weight Turbidity;g/L;Calculated from the Optical Turbidity measurements, using dependency Weight Turbidity=f(Optical Turbidity) | δ18O, water | δ18O H2O | δ Deuterium, water | δD H2O | stake (ablation measurement point) number | Identification | ID | snow-to-ice date | Comment | counted from cm of melted snow/firn/ice and corresponding densities | Melt rate in water equivalent per day | Melt rate | installation | Year of establishment | Establishment | Identification number | ID no | Snow height | Snow h | Density, snow | Density snow citable alpine catchment catchment hydrology Caucasus Conductivity Discharge Djankuat Glacial climate Glacier Catchment high-altitude hydrological data isotope composition isotope data Meteorological datasets mountain catchment mountain station North Caucasus precipitation research catchment Russia method14212 method50 method570 param104253 param105410 param130429 param135578 param145730 param155412 param1570 param162619 param2219 param28739 param4611 param48820 param501856 param508172 param5153 param52477 param7056 param717 param7370 param761 param78603 pi114361 pi114362 pi66759 pi87355 author114355 author114356 author114357 author114358 author114359 author114361 author31980 author66759 author66760 author66761 author66762 author66763 author66764 author66765 author66766 author66767 author66768 author66769 author66770 author66771 author66772 author66773 author66774 author66775 author67049 author74083 author87352 author87353 author87354 author87355 author87356 author87357 award4484 award4760 award4761 funder20642 funder3000 geocode1599 geocode1600 geocode1601 inst22541 inst2934 inst2987 inst352 inst48 journal16590 license21 ref97455 refds894807 refds940839 term47344 term47956 term49691 term51492 term51774 term51920 term52067 term53781 term54838 term60468 term67352 term69435 term70132 term70133 term70134 term70135 term70136 term70137 term73546