Summer anorganic hydrochemistry (cations and anions) of thermokarst lakes in the Central Yakutian Lowland and mountain lakes in the Verkhoyansk Mountain Range in Eastern Yakutia ...

• Main Authors: Baisheva, Izabella, Pestryakova, Luidmila A, Ushnitskaya, Lena A, Davydova, Paraskovya V, Levina, Sardana N, Egorov, Aital, Zakharov, Evgenii S, Gorodnichev, Ruslan, Glückler, Ramesh, Stieg, Amelie, Eder, Iris, Kahl, Jan, Meister, Philip, Wieczorek, Mareike, Overduin, Pier Paul, Eulenburg, Antje, Stoof-Leichsenring, Kathleen Rosmarie, Biskaborn, Boris K, Herzschuh, Ulrike, Heim, Birgit
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Alaas lake; Alas; Central Yakutia; Eastern Yakutia; hydrochemical parameters; Hydrochemistry; Ion composition; Ionic composition; ions; lake water; Lena-Amga interfluve; mountain lakes; Permafrost; subarctic; taiga; thaw lake; water chemistry; Yakutia; Event label; DATE/TIME; LATITUDE; LONGITUDE; ELEVATION; DEPTH, water; Campaign; Sample code/label; Country; Location; Lake; Calcium; Magnesium; Sodium; Potassium; Silicon; Phosphate; Bicarbonate ion; Chloride; Sulfate; Fluoride; Nitrate; Iron; Aluminium; Strontium; Barium; Manganese; Bromide; Phosphorus; Sampling lake; Inductively coupled plasma optical emission spectrometry ICP-OES, Perkin-Elmer, Optima 8300DV; Ion chromatography Thermo-Fischer ICS 2100; Alfred Wegener Institute; Ice; permafrost; Subarctic; Thermokarst
• Online Access: https://dx.doi.org/10.1594/pangaea.949842; https://doi.pangaea.de/10.1594/PANGAEA.949842

Between 6th August and 2nd September, 2021, a total of 66 lakes in Central and Eastern Yakutia were assessed as part of the joint Russian-German expedition (NEFU-AWI; RU-Land_2021_Yakutia). Samples and data were obtained with a large variety of different methods and for a wide range of sampling purposes. This dataset presents the results of hydrochemical laboratory analyses of ion concentration. Of those 66 hydrochemical analyses, 15 are from mountain lakes located within the Verkhoyansk mountain range, at the eastern end of the expedition route, including mostly intermontane basin or glacial lakes (average elevation: c. 1080 m a.s.l.). 13 lakes were sampled in Oymyakonsky District and two lakes in Tomponsky District. The hydrochemical dataset from the other 52 lakes that lie within the eastern extent of the Central Yakutian Lowland (average elevation: c. 190 m a.s.l.) represents thermokarst lakes. Thermokarst lakes originate from thawing of ice-rich permafrost and were found in different stages of their ... : Method: Surface water of lakes was obtained from ca 50 cm water depth. Fieldwork treatment of the water samples for anions and cations included a filtering step through 0.45 µm pore-size pre-syringe cellulose-acetate filters into 8 ml wide mouth bottles (anions), and 15 ml falcon tubes (cations), with a conservation step for cations by adding 65% HNO3. The ionic composition of surface water was measured at the dedicated hydrochemical laboratory of Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany. ...