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


Gehrels, WR and Callard, SL and Moss, PT and Marshall, WA and Blaauw, M and Hunter, J and Milton, JA and Garnett, MH, Nineteenth and twentieth century sea-level changes in Tasmania and New Zealand, Earth and Planetary Science Letters, 315 pp. 94-102. ISSN 0012-821X (2012) [Refereed Article]

Copyright Statement

2011 Elsevier B.V.

DOI: doi:10.1016/j.epsl.2011.08.046


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.

Item Details

Item Type:Refereed Article
Keywords:salt marsh, proxy data, foraminifera, Holocene, Anthropocene, Southwest Pacific
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Adaptation to climate change
Objective Field:Climate change adaptation measures (excl. ecosystem)
UTAS Author:Hunter, J (Dr John Hunter)
ID Code:79896
Year Published:2012
Web of Science® Times Cited:51
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-10-10
Last Modified:2017-10-31

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