DOI: 10.1016/j.quascirev.2015.09.025
Scopus记录号: 2-s2.0-84946225463
论文题名: An examination of spatial variability in the timing and magnitude of Holocene relative sea-level changes in the New Zealand archipelago
作者: Clement A.J.H. ; Whitehouse P.L. ; Sloss C.R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 131 起始页码: 73
结束页码: 101
语种: 英语
英文关键词: Coastal geomorphology
; Continental levering
; Glacial isostatic adjustment
; Holocene
; Hydro-isostatic loading
; New Zealand
; Relative sea-level change
Scopus关键词: Deformation
; Glacial geology
; Gravitation
; Ocean currents
; Sea level
; Surface waters
; Tectonics
; Continental levering
; Glacial Isostatic Adjustments
; Holocenes
; Isostatic loading
; New zealand
; Relative sea-level changes
; Loading
; coastal morphology
; continental shelf
; Holocene
; magnitude
; meltwater
; numerical model
; Postglacial
; prediction
; reconstruction
; sea level change
; spatial variation
; Auckland
; Canterbury [South Island]
; Coromandel Peninsula
; New Zealand
; North Island
; Otago
; South Island
; Southern Ocean
; Waikato
英文摘要: Holocene relative sea-level (RSL) changes have been reconstructed for four regions within the New Zealand archipelago: the northern North Island (including Northland, Auckland, and the Coromandel Peninsula); the southwest coast of the North Island; the Canterbury coast (South Island); and the Otago coast (South Island). In the North Island the RSL highstand commenced c. 8100-7240 cal yr BP when present mean sea-level (PMSL) was first attained. This is c. 600-1400 years earlier than has been previously indicated for the New Zealand region as a whole, and is consistent with recent Holocene RSL reconstructions from Australia. In North Island locations the early-Holocene sea-level highstand was quite pronounced, with RSL up to 2.75 m higher than present. In the South Island the onset of highstand conditions was later, with the first attainment of PMSL being between 7000-6400 cal yr BP. In the mid-Holocene the northern North Island experienced the largest sea-level highstand, with RSL up to 3.00 m higher than present. This is demonstrably higher than the highstand recorded for the southwest North Island and Otago regions. A number of different drivers operating at a range of scales may be responsible for the spatial and temporal variation in the timing and magnitude of RSL changes within the New Zealand archipelago. One possible mechanism is the north-south gradient in RSL that would arise in the intermediate field around Antarctica in response to the reduced gravitational attraction of the Antarctic Ice Sheet (AIS) as it lost mass during the Holocene. This gradient would be enhanced by the predicted deformation of the lithosphere in the intermediate field of the Southern Ocean around Antarctica due to hydro-isostatic loading and mass loss of the AIS. However, no such long-wavelength signals in sea-surface height or solid Earth deformation are evident in glacial isostatic adjustment (GIA) model predictions for the New Zealand region, while research from Australia has suggested that north-south variations in Holocene RSL changes due to hydro-isostatic influences are limited or non-existent. At the regional-to local-scale, post-glacial meltwater loading on the continental shelf around New Zealand is predicted by GIA modelling to have a significant effect on the timing and magnitude of RSL changes through the phenomenon of continental levering. The spatial variation in continental levering is controlled by the configuration of the coast and the width of the adjacent continental shelf, with continental levering providing a robust explanation for the observed spatial and temporal variations in RSL changes. Further research is required to characterise the regional and local effects of different tectonic regimes, wave climates, and sediment regimes. These are potentially very significant drivers of RSL variability at the regional-to local-scale. However, the magnitude of their potential effects remains equivocal. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59739
Appears in Collections: 过去全球变化的重建
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作者单位: Physical Geography Group, Institute of Agriculture and Environment, Massey University, Private Bag 11-222, Palmerston North, New Zealand; Department of Geography, Durham University, South Road, Durham, United Kingdom; School of Earth and Environmental Sciences, Queensland University of Technology, GPO Box 2434, Brisbane Q, Australia
Recommended Citation:
Clement A.J.H.,Whitehouse P.L.,Sloss C.R.. An examination of spatial variability in the timing and magnitude of Holocene relative sea-level changes in the New Zealand archipelago[J]. Quaternary Science Reviews,2016-01-01,131