Schirrmeister, Lutz; Siegert, Christine (2017): Pore-water analyses of permafrost deposits from Lya_1999_R8+50 Bol'shoy Lyakhovsky Island in 1999 [dataset]. Alfred Wegener Institute - Research Unit Potsdam, PANGAEA, https://doi.org/10.1594/PANGAEA.881506
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Project(s):
Permafrost Research (Periglacial Dynamics) @ AWI (AWI_PerDyn)
Coverage:
Latitude: 73.332900 * Longitude: 141.332900
Event(s):
Lya_1999_R8+50 * Latitude: 73.332900 * Longitude: 141.332900 * Location: Lyakhovsky Islands * Campaign: RU-Land_1999_Lyakhovsky (Lya_1999) * Basis: AWI Arctic Land Expedition * Method/Device: Multiple investigations (MULT) * Comment: horizontal distance from the Zimov'e River mouth in 1999: 850 m W
Comment:
In order to get information about the pore-water characteristics from the dry samples, the water-soluble elements in the sediments were determined by shaking the samples with a proportionate amount of ultrapure water for a defined period of time. To obtain the water extracts, approximately 1 g of the freeze-dried sample was shaken for approximately 90 minutes in 50 ml centrifuge tubes with ultrapure water at a soil:water ratio of 1:25 using an overhead shaker (Gerhardt Laboshake). Then the suspension was centrifuged (Heraeus Multifuge 3s) at 4000 rpm for 15 minutes. The decanted extraction was filtered through a 0.45 µm cellulose acetate filter. We measured total dissolved elemental concentrations of Al, Ba, Ca, Fe, K, Mg, Mn, Na, P, Si, and Sr and anion concentrations of F-, Cl-, SO42-, Br-, NO3-, PO43-, and HCO3-.The element concentrations were analyzed using inductively coupled plasma-optical emission spectrometry (ICP-OES, Perkin-Elmer Optima 8300DV), while the anion content was determined by ion chromatography (IC, Thermo ICS2100). Hydrogen carbonate concentrations were measured by potentiometric pH-value titration with 0.01 M HCl using an automatic titrator (Metrohm 794 Basic Titrino). In order to estimate the procedural error, extractions were carried out in duplicate for every 5th to 10th sample and 2-3 blank solutions of ultrapure water were treated in the same manner as the extractions and measured for concentrations. Water EC and pH values were measured using a WTW MultiLab 540 multi-parameter device equipped with a TetraCon 325 cell referenced to 25 °C and a pH Sentix 81 electrode.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Schirrmeister, Lutz | |||
| 2 | Height above sea level | Height | m a.s.l. | Schirrmeister, Lutz | ||
| 3 | Sediment type | Sediment | Schirrmeister, Lutz | |||
| 4 | pH | pH | Schirrmeister, Lutz | |||
| 5 | Conductivity, electrolytic | EC | µS/cm | Schirrmeister, Lutz | ||
| 6 | Calcium | Ca2+ | mg/l | Schirrmeister, Lutz | ||
| 7 | Potassium | K+ | mg/l | Schirrmeister, Lutz | ||
| 8 | Magnesium | Mg2+ | mg/l | Schirrmeister, Lutz | ||
| 9 | Sodium | Na+ | mg/l | Schirrmeister, Lutz | ||
| 10 | Chloride | Cl- | mg/l | Schirrmeister, Lutz | ||
| 11 | Nitrate | [NO3]- | mg/l | Schirrmeister, Lutz | ||
| 12 | Sulfate | [SO4]2- | mg/l | Schirrmeister, Lutz | ||
| 13 | Bicarbonate ion | [HCO3]- | mg/l | Schirrmeister, Lutz |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
26 data points