Archive · dataset · 2020
Alkenone temperature data from three Holocene lake sediment sequences on Svalbard
Listed in PANGAEA
These data encompass three temperature Arctic temperature reconstructions that cover the entire Holocene epoch – the past 11 700 years.
Description
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.
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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.
Links
Where it is published
- DOI doi.org/10.1594/pangaea.923381 ↗
DOI / persistent id · from PANGAEA
Catalogue records · 1
- OAI-PMH record ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=oai_dc&identifier=o… ↗
metadata API · from PANGAEA
Topics
- From keywords
- Earth & Environmental Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| PANGAEA | oai:pangaea.de:doi:10.1594/PANGAEA.923381 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · PANGAEA | connector:pangaea@1.0.0 | |
| description | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/description |
| license | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/rights |
| publication_date | source · PANGAEA | connector:pangaea@1.0.0 | |
| spatial | source · PANGAEA | connector:pangaea@1.0.0 | |
| title | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/title |