Ground ice hydrochemical composition of permafrost core ICDP5011-3 ...

• Main Authors: Schwamborn, Georg, Meyer, Hanno, Schirrmeister, Lutz, Fedorov, Grigory B
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: DEPTH, sediment/rock; Water content, wet mass; δ18O, water; δ Deuterium, water; pH; Conductivity, electrolytic; Calcium; Sodium and Potassium; Magnesium; Chloride ion; Sulfate ion; Bicarbonate; Pneumatic rotary drill "SIF-650M"; Mass spectrometer Finnigan Delta-S; pH and conductivity meter, WTW, Multilab 540; ICP-OES, Perkin-Elmer, Optima 3000XL; Ion chromatograph, Dionex Corporation, DX-320; Titration potentiometric, 794 Basic Titrino Metrohm; ICDP_Elgygytgyn-Drilling-Project; Sampling on land; Lake Elgygytgyn - Climate History of the Arctic since 3.6 Million Years ELGYGYTGYN; Arctic; Hanno; Lake Marginal; Western Crater; Ice; permafrost
• Online Access: https://dx.doi.org/10.1594/pangaea.823392; https://doi.pangaea.de/10.1594/PANGAEA.823392

The continuous sediment record from Lake El'gygytgyn in the northeastern Eurasian Arctic spans the last 3.6 Ma and for much of this time permafrost dynamics and lake level changes have likely played a crucial role for sediment delivery to the lake. Changes in the ground-ice hydrochemical composition (d18O, dD, pH, electrical conductivity, Na+, Mg2+, Ca2+, K+, HCO3-, Cl-, SO4-) of a 141 m long permafrost record from the western crater plain are examined to reconstruct repeated periods of freeze and thaw at the lake edge. Stable water isotope and major ion records of ground ice in the permafrost reflect both a synsedimentary palaeo-precipitation signal preserved in the near-surface permafrost (0.0-9.1 m core depth) and a post-depositional record of thawing and refreezing in deeper layers of the core (9.1-141.0 m core depth). These lake marginal permafrost dynamics were controlled by lake level changes that episodically flooded the surfaces and induced thaw in the underlying frozen ground. During times of lake ... : Supplement to: Schwamborn, Georg; Meyer, Hanno; Schirrmeister, Lutz; Fedorov, Grigory B (2014): Past freeze and thaw cycling in the margin of the El'gygytgyn crater deduced from a 141 m long permafrost record. Climate of the Past, 10(3), 1109-1123 ...