The University of Southampton
University of Southampton Institutional Repository

Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand

Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand
Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand
Positive deviations from linear sea-level trends represent important climate signals if they are persistent and geographically widespread. This paper documents rapid sea-level rise reconstructed from sedimentary records obtained from salt marshes in the Southwest Pacific region (Tasmania and New Zealand). A new late Holocene relative sea-level record from eastern Tasmania was dated by AMS14C (conventional, high precision and bomb-spike), 137Cs, 210Pb, stable Pb isotopic ratios, trace metals, pollen and charcoal analyses. Palaeosea-level positions were determined by foraminiferal analyses. Relative sea level in Tasmania was within half a metre of present sea level for much of the last 6000 yr. Between 1900 and 1950 relative sea level rose at an average rate of 4.2 ± 0.1 mm/yr. During the latter half of the 20th century the reconstructed rate of relative sea-level rise was 0.7 ± 0.6 mm/yr. Our study is consistent with a similar pattern of relative sea-level change recently reconstructed for southern New Zealand. The change in the rate of sea-level rise in the SW Pacific during the early 20th century was larger than in the North Atlantic and could suggest that northern hemisphere land-based ice was the most significant melt source for global sea-level rise.
salt marsh, proxy data, foraminifera, Holocene, Anthropocene, Southwest Pacific
0012-821X
94-102
Gehrels, W. Roland
ad913def-9ab9-4218-8cdf-da02d7d04994
Callard, S. Louise
d70ac7ce-8a2e-4203-93b0-180b54d90c8a
Moss, Patrick T.
c76d9987-97bf-420f-8bfb-967434e6ed3f
Marshall, William A.
5c43c47c-96de-433e-83d9-791b2f19b21a
Blaauw, Maarten
42f13bb7-e011-40f3-a218-ff207204b833
Hunter, John
ab0c9fe0-81b0-443f-b9fb-f5cb12c1c44d
Milton, J. Andrew
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Garnett, Mark H.
b5b55932-bc30-4c28-83c4-1602ee0181c1
Gehrels, W. Roland
ad913def-9ab9-4218-8cdf-da02d7d04994
Callard, S. Louise
d70ac7ce-8a2e-4203-93b0-180b54d90c8a
Moss, Patrick T.
c76d9987-97bf-420f-8bfb-967434e6ed3f
Marshall, William A.
5c43c47c-96de-433e-83d9-791b2f19b21a
Blaauw, Maarten
42f13bb7-e011-40f3-a218-ff207204b833
Hunter, John
ab0c9fe0-81b0-443f-b9fb-f5cb12c1c44d
Milton, J. Andrew
9e183221-d0d4-4ddb-aeba-0fdde9d31230
Garnett, Mark H.
b5b55932-bc30-4c28-83c4-1602ee0181c1

Gehrels, W. Roland, Callard, S. Louise, Moss, Patrick T., Marshall, William A., Blaauw, Maarten, Hunter, John, Milton, J. Andrew and Garnett, Mark H. (2012) Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand. Earth and Planetary Science Letters, 315-316, 94-102. (doi:10.1016/j.epsl.2011.08.046).

Record type: Article

Abstract

Positive deviations from linear sea-level trends represent important climate signals if they are persistent and geographically widespread. This paper documents rapid sea-level rise reconstructed from sedimentary records obtained from salt marshes in the Southwest Pacific region (Tasmania and New Zealand). A new late Holocene relative sea-level record from eastern Tasmania was dated by AMS14C (conventional, high precision and bomb-spike), 137Cs, 210Pb, stable Pb isotopic ratios, trace metals, pollen and charcoal analyses. Palaeosea-level positions were determined by foraminiferal analyses. Relative sea level in Tasmania was within half a metre of present sea level for much of the last 6000 yr. Between 1900 and 1950 relative sea level rose at an average rate of 4.2 ± 0.1 mm/yr. During the latter half of the 20th century the reconstructed rate of relative sea-level rise was 0.7 ± 0.6 mm/yr. Our study is consistent with a similar pattern of relative sea-level change recently reconstructed for southern New Zealand. The change in the rate of sea-level rise in the SW Pacific during the early 20th century was larger than in the North Atlantic and could suggest that northern hemisphere land-based ice was the most significant melt source for global sea-level rise.

Full text not available from this repository.

More information

Published date: 15 January 2012
Keywords: salt marsh, proxy data, foraminifera, Holocene, Anthropocene, Southwest Pacific
Organisations: Geochemistry

Identifiers

Local EPrints ID: 300712
URI: http://eprints.soton.ac.uk/id/eprint/300712
ISSN: 0012-821X
PURE UUID: af0b16b1-b406-410a-95d7-cc144552fa68

Catalogue record

Date deposited: 23 Feb 2012 17:16
Last modified: 16 Jul 2019 22:10

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×