Elbrus Ice Core, Caucasus record of ammonia (NH4+) ...
A deep ice core was drilled to bedrock (182.6 m) in 2009 on the western plateau of Mount Elbrus (ELB, 43°N, 42°E; 5115 m above sea level, asl) in the Caucasus (Russia). The upper 168.6 m (131.5 meters water equivalent, mwe) depth of the ice core were first dated by annual layer counting using pronou...
| Main Authors: | , , , |
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| Format: | Dataset |
| Language: | unknown |
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Zenodo
2024
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5281/zenodo.12549686 https://zenodo.org/doi/10.5281/zenodo.12549686 |
| Summary: | A deep ice core was drilled to bedrock (182.6 m) in 2009 on the western plateau of Mount Elbrus (ELB, 43°N, 42°E; 5115 m above sea level, asl) in the Caucasus (Russia). The upper 168.6 m (131.5 meters water equivalent, mwe) depth of the ice core were first dated by annual layer counting using pronounced seasonal variations in ammonium and succinate concentrations, both exhibiting well-marked winter minima (Mikhalenko et al., 2015; Preunkert et al., 2019). Chemical measurements were done with a Dionex ICS-1000 chromatograph equipped with a CS12 separator column for cations (Na+, K+, Mg2+, Ca2+, and NH4+), a Dionex 600 equipped with an AS11 separator column for anions (Cl-, NO3-, and SO42-) and light carboxylates. Detailed working conditions are given in Legrand et al. (2013). Using the winter ammonium/succinate minima we determined half-year summer and winter means of of ammonia (NH4+) from 1748 to 2009. ... |
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