Data repository for: Relative sea-level trends in southern Norway during the last millennium

DOI

This dataset contains all supplementary data for: Relative sea-level trends in southern Norway during the last millennium. It is organized as follows: - 01 - Tidal data October to December 2023 - 02 - Stable isotopes of surface transect and TV-1 - 03 - Salinity measurements of surface transect - 04 - Grain size TV-1 - 05 - LOI and DBD TV-2 - 06 - XRF and PCA TV-1 - 07 - Chronology TV-1 - 08 - Accretion rates TV-1 - 09 - All data vs modelled age

Geological reconstructions of relative sea-level (RSL) from southern Norway show falling RSL during the last 7000 cal. yr BP, but tide gauge measurements document a slow RSL rise since at least 1960 CE. With an age gap of c. 1400 years between the youngest geologically-reconstructed sea-level index point (SLIP) and the installation of the Tregde tide gauge in southernmost Norway, the exact nature and timing of the onset of RSL rise in southern Norway remains unknown. To fill this gap, we collected peat cores from a salt marsh to reconstruct RSL trends over the past 1000 years using a multiproxy approach, including 210Pb and 14C dating, grain-size analysis, loss-on-ignition (LOI), geochemistry (stable carbon isotopes, carbon/nitrogen ratios and XRF) and diatoms. Our data suggests decreasing tidal current strength and salinity over most of the last millennium, suggesting falling RSL. Sediment geochemistry also appears to vary with wetter and drier climatic periods. An increase in marine-brackish diatoms in combination with an acceleration in sedimentation rates after 1930 CE (1899-1954 CE) suggest that the onset of RSL rise began around this time in southernmost Norway. While most of the proxy data appear to have delayed sensitivity to RSL changes and may be linked to other causal processes, they, nonetheless, provide valuable insight into the environmental response of high-latitude temperate salt marshes to slow rates of RSL change.

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Identifier
DOI https://doi.org/10.18710/QSGWSJ
Metadata Access https://dataverse.no/oai?verb=GetRecord&metadataPrefix=oai_datacite&identifier=doi:10.18710/QSGWSJ
Provenance
Creator Holthuis, Max ORCID logo; Nixon, F. Chantel (ORCID: 0000-0002-6113-100X); Kylander, Malin E. ORCID logo; van der Bilt, Willem G.M. (ORCID: 0000-0003-3157-451X); Hong, Isabel; Joyse, Kristen M. ORCID logo; Lakeman, Thomas R. ORCID logo; Martin, Jake ORCID logo; Peter, Maria; Solheim Holme, Simon; Horton, Benjamin P. ORCID logo
Publisher DataverseNO
Contributor Holthuis, Max; NTNU – Norwegian University of Science and Technology; Norges Geologiske Undersøkelse; DataverseNO
Publication Year 2024
Funding Reference Norges forskningsråd 303594
Rights CC0 1.0; info:eu-repo/semantics/openAccess; http://creativecommons.org/publicdomain/zero/1.0
OpenAccess true
Contact Holthuis, Max (NTNU – Norwegian University of Science and Technology)
Representation
Resource Type Survey data; Dataset
Format text/plain; text/comma-separated-values; application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size 36614; 2385714; 3755; 3294; 2114; 11883; 1987; 49369; 52780; 11298; 9120; 429111; 588678; 834; 650; 46014; 295175; 1642; 248; 372; 1985; 4256; 133264
Version 3.0
Discipline Earth and Environmental Science; Environmental Research; Geosciences; Natural Sciences
Spatial Coverage (6.934W, 58.051S, 6.954E, 58.063N)