van der Bilt, Willem G M; D'Andrea, William J; Werner, Johannes P; Bakke, Jostein (2020): Alkenone temperature data from three Holocene lake sediment sequences on Svalbard [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.923381
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Abstract:
These data encompass three temperature Arctic temperature reconstructions that cover the entire Holocene epoch – the past 11 700 years. Temperatures were inferred using the UK37 alkenone unsaturation index after doi:10.1016/S0146-6380(86)80001-8, and the Group 1 phylotype calibration by doi:10.1016/j.gca.2015.10.031 following chemotaxonomic identification using the RIK indices after doi:10.1016/j.gca.2016.02.019. We report samples that derives from lake sediment cores taken in 2014 from three closely-spaced lakes on Arctic Svalbard (79.5°N:11°E): Gjøavatnet (n=98), Hajeren (n=67) and Hakluyt (n=90). Alkenones were isolated following ASE extraction and silica gel flash chromatography. Alkenone ratios were determined using Gas Chromatograph Ionization (GC-FID). All analytical analyses were carried out at Lamont Doherty Earth Observatory (LDEO) of Columbia University in 2016-2017. Alkenone temperatures are expressed as deviations from the 1850-1900 AD Pre-Industrial average as detailed in the Supplementary of doi:10.1029/2019GL084384. Core chronologies are based on 14C dating and were generated by previous workers – based on these existing age-depth relations, each of the presented records resolves sub-centennial changes. These temperature reconstructions were generated to place on-going Arctic warming in a long-term context. Our findings show that reconstructed temperatures exceeded instrumental observations and 21st century projections during the Early Holocene period around 10 000 years ago.
Supplement to:
van der Bilt, Willem G M; D'Andrea, William J; Werner, Johannes P; Bakke, Jostein (2019): Early Holocene Temperature Oscillations Exceed Amplitude of Observed and Projected Warming in Svalbard Lakes. Geophysical Research Letters, 46(24), 14732-14741, https://doi.org/10.1029/2019GL084384
Coverage:
Median Latitude: 79.496430 * Median Longitude: 10.922613 * South-bound Latitude: 79.259290 * West-bound Longitude: 10.510000 * North-bound Latitude: 79.770000 * East-bound Longitude: 11.517840
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
3 datasets
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Datasets listed in this bundled publication
- van der Bilt, WGM; D'Andrea, WJ; Werner, JP et al. (2020): Alkenone temperature data of Holocene lake sediment sequence AMP112 from Svalbard. https://doi.org/10.1594/PANGAEA.923380
- van der Bilt, WGM; D'Andrea, WJ; Werner, JP et al. (2020): Alkenone temperature data of Holocene lake sediment sequence GJP0114 from Svalbard. https://doi.org/10.1594/PANGAEA.923377
- van der Bilt, WGM; D'Andrea, WJ; Werner, JP et al. (2020): Alkenone temperature data of Holocene lake sediment sequence HAP0212 from Svalbard. https://doi.org/10.1594/PANGAEA.923379