Journal
QUATERNARY SCIENCE REVIEWS
Volume 99, Issue -, Pages 1-16Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.quascirev.2014.06.008
Keywords
North Atlantic; Sea level; Transfer function; Diatoms; Foraminifera; Salt marsh; Climate
Funding
- UK Natural Environment Research Council [NE/G004757/1]
- Natural Environment Research Council Radiocarbon Facility [NRCF010001, 1490.0810, 1566.0511, 1604.0112, 1650.0612]
- Division Of Earth Sciences
- Directorate For Geosciences [1440015] Funding Source: National Science Foundation
- Natural Environment Research Council [NE/G003440/1, NRCF010001, NE/G004757/1, BIGF010001] Funding Source: researchfish
- NERC [NRCF010001, NE/G004757/1, BIGF010001, NE/G003440/1] Funding Source: UKRI
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Sea-level changes record changes in the mass balance of ice sheets and mountain glaciers, as well as dynamic ocean-atmosphere processes. Unravelling the contribution of each of these mechanisms on Late Holocene timescales ideally requires observations from a number of sites on several coasts within one or more oceans. We present the first 2000 year-long continuous salt marsh-based reconstructions of relative sea-level (RSL) change from the eastern North Atlantic and uniquely from a slowly uplifting coastline. We develop three RSL histories from two sites in north west Scotland to test for regional changes in sea-level tendency (a positive tendency indicating an increase in the proximity of marine conditions and a negative tendency the reverse), whilst at the same time highlighting methodological issues, including the problems of dataset noise when applying transfer functions to fossil salt-marsh sequences. The records show that RSL has been stable (+/-0.4 m) during the last two millennia, and that the regional sea-level tendency has been negative throughout most of the record lengths. A recent switch in the biostratigraphy of all three records, indicating a regional positive tendency, means we cannot reject the hypothesis of a 20th century sea-level acceleration occurring in north west Scotland that must have exceeded the rate of background RSL fall (-0.4 mm yr(-1)), but this signal appears muted and later than recorded from the western North Atlantic. (C) 2014 Elsevier Ltd. All rights reserved.
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