Poliakova, Anastasia; Brown, Anthony G; Sanderson, David C W; Cresswell, Alan J; Håkansson, Lena M; Goslar, Tomasz; Alsos, Inger Greve: The 14C datings, LOI, XRF, pOSL and pIRSL data obtained from the sediment core Te2019 (Svalbard, Colesdalen valley, lake Tenndammen) [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.942032 (dataset in review)
Abstract:
Human-induced climate change will alter hydrological regimes in the Arctic. Changes in flood frequency have occurred in the past, but their study has been limited by dating problems - themselves the result of hydroclimatic events. Faced with multiple 14C AMS age-reversals in a high Arctic Svalbard lake sediment record, we applied portable optically stimulated luminescence (pOSL) profiling (verified by full laboratory measurements) and hydrological proxies. Date reversals were associated with multiple flooding and drying events over the last 700 years. We applied the same methodology to a nearby lake with no age-reversals. The resulting pOSL record was dominated by noise with no hydro-climatic signal. The results reveal that Arctic lakes can be highly sensitive to sub-centennial climatic events, or largely insensitive, and that this can be identified with luminescence profiling. These findings provide a new tool to obtain high-resolution data on system stability and resilience from lake sediments.
Supplement to:
Poliakova, Anastasia; Brown, Anthony G; Sanderson, David C W; Cresswell, Alan J; Håkansson, Lena M; Goslar, Tomasz; Alsos, Inger Greve (in review): Luminescence profiling and plant proxies reveal differential climate sensitivity of Arctic lakes.
Funding:
The Research Council of Norway (RCN), grant/award no. Grants (213692/F20, 230617/E10, and 296987/E50): Future ArcTic Ecosystems (FATE): drivers of diversity and future scenarios from ethnoecology, contemporary ecology and ancient DNA
Coverage:
Latitude: 78.101967 * Longitude: 15.033733
Date/Time Start: 2019-09-04T00:00:00 * Date/Time End: 2019-09-04T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
4 datasets
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Datasets listed in this bundled publication
- Poliakova, A; Brown, AG; Sanderson, DCW et al. (in review): 14C datings of sediment core Te2019. https://doi.pangaea.de/10.1594/PANGAEA.941940
- Poliakova, A; Brown, AG; Sanderson, DCW et al. (in review): Portable optically stimulated luminescence and infrared stimulated luminescence measurements of sediment core Te2019. https://doi.pangaea.de/10.1594/PANGAEA.942031
- Poliakova, A; Brown, AG; Sanderson, DCW et al. (in review): Raw counts of spheroidal carbonaceous particles of sediment core Te2019. https://doi.pangaea.de/10.1594/PANGAEA.941968
- Poliakova, A; Brown, AG; Sanderson, DCW et al. (in review): X-ray fluorescence (XRF) measurements of sediment core Te2019. https://doi.pangaea.de/10.1594/PANGAEA.941952