An Age Scale for the First Shallow (Sub-)Antarctic Ice Core from Young Island, Northwest Ross Sea
Abstract
:1. Introduction
2. Materials and Methods
2.1. Ice Core Drilling and Processing
2.2. Ice Core Discrete Chemistry
2.3. Ice Core Continuous Flow Analysis Data
2.4. Microparticle Analysis
2.5. Meteorological Data
3. Results
3.1. Meteorological Conditions
3.2. Data for Ice Core Dating
3.2.1. Physical Characteristics of the Ice Core
3.2.2. Stable Water Isotopes (δ18O)
3.2.3. Major Ion Concentration Records
3.2.4. Dust
3.2.5. Hydrogen Peroxide Record
3.3. Dating Approaches
3.3.1. Dating Approach A—Based on δ18O
3.3.2. Dating Approach B—Based on NO3− Record
3.3.3. Dating Approach—Based on Marine Species and Large Melt Layers
3.3.4. Dating Approach D—Based on nssSO42−:ssNa+ Ratio and MSA− Concentration
3.4. Summary of Age Scales
3.5. Tie Point of the Age Scale
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Dating Approach | Based on | Proposed Bottom Age | Uncertainty |
---|---|---|---|
Thomas et al. (2021) | Herron-Langway densification model driven by the annual average precipitation from ERA5 | 2002 | ±4 |
A | d18O troughs (winter) | 1989 | ±6 |
B | NO3− peaks (summer) | 1988 | ±6 |
C | Marine species MSA−, SO42−, NO3−, and Br− peaks plus melt layers >10 cm (summer) | 1995/94 | ±2 |
D | nssSO42−:ssNa+ ratio and MSA− troughs (winter) | 1993 | ±1 |
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Moser, D.E.; Jackson, S.; Kjær, H.A.; Markle, B.; Ngoumtsa, E.; Pedro, J.B.; Segato, D.; Spolaor, A.; Tetzner, D.; Vallelonga, P.; et al. An Age Scale for the First Shallow (Sub-)Antarctic Ice Core from Young Island, Northwest Ross Sea. Geosciences 2021, 11, 368. https://doi.org/10.3390/geosciences11090368
Moser DE, Jackson S, Kjær HA, Markle B, Ngoumtsa E, Pedro JB, Segato D, Spolaor A, Tetzner D, Vallelonga P, et al. An Age Scale for the First Shallow (Sub-)Antarctic Ice Core from Young Island, Northwest Ross Sea. Geosciences. 2021; 11(9):368. https://doi.org/10.3390/geosciences11090368
Chicago/Turabian StyleMoser, Dorothea Elisabeth, Sarah Jackson, Helle Astrid Kjær, Bradley Markle, Estelle Ngoumtsa, Joel B. Pedro, Delia Segato, Andrea Spolaor, Dieter Tetzner, Paul Vallelonga, and et al. 2021. "An Age Scale for the First Shallow (Sub-)Antarctic Ice Core from Young Island, Northwest Ross Sea" Geosciences 11, no. 9: 368. https://doi.org/10.3390/geosciences11090368