scholarly journals A 20th century acceleration of sea-level rise in New Zealand

2008 ◽  
Vol 35 (2) ◽  
Author(s):  
W. Roland Gehrels ◽  
Bruce W. Hayward ◽  
Rewi M. Newnham ◽  
Katherine E. Southall
Keyword(s):  
New Zealand ◽  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century

A foraminiferal proxy record of 20th century sea-level rise in the Manukau Harbour, New Zealand

2012 ◽  
Vol 63 (4) ◽  
pp. 370 ◽  
Author(s):  
Hugh R. Grenfell ◽  
Bruce W. Hayward ◽  
Ritsuo Nomura ◽  
Ashwaq T. Sabaa
Keyword(s):  
New Zealand ◽  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century ◽  
Tide Gauge ◽  
Sediment Accumulation ◽  
Proxy Record ◽  
Tide Gauge Record ◽  
Tidal Salt Marsh

The present study aimed to extract a sea-level history from northern New Zealand salt-marsh sediments using a foraminiferal proxy, and to extend beyond the longest nearby tide-gauge record. Transects through high-tidal salt marsh at Puhinui, Manukau Harbour, Auckland, New Zealand, indicate a zonation of dominant foraminifera in the following order (with increasing elevation): Ammonia spp.–Elphidium excavatum, Ammotium fragile, Miliammina fusca, Haplophragmoides wilberti–Trochammina inflata, Trochamminita salsa–Miliammina obliqua. The transect sample faunas are used as a training set to generate a transfer function for estimating past tidal elevations in two short cores nearby. Heavy metal, 210Pb and 137Cs isotope analyses provide age models that indicate 35 cm of sediment accumulation since ~1890 AD. The first proxy-based 20th century rates of sea-level rise from New Zealand’s North Island at 0.28 ± 0.05 cm year–1 and 0.33 ± 0.07 cm year–1 are estimated. These are faster than the nearby Auckland tide gauge for the same interval (0.17 ± 0.1 cm year–1), but comparable to a similar proxy record from southern New Zealand (0.28 ± 0.05 cm year–1) and to satellite-based observations of global sea-level rise since 1993 (0.31 ± 0.07 cm year–1).

New Zealand 20th century sea level rise: Resolving the vertical land motion using space geodetic and geological data

2013 ◽  
Vol 118 (11) ◽  
pp. 6076-6091 ◽  
Author(s):  
Abdelali Fadil ◽  
Paul Denys ◽  
Robert Tenzer ◽  
Hugh R. Grenfell ◽  
Pascal Willis
Keyword(s):  
New Zealand ◽  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century ◽  
Geological Data ◽  
Vertical Land Motion

scholarly journals Preparing for Sea-Level Rise through Adaptive Managed Retreat of a New Zealand Stormwater and Wastewater Network

2020 ◽  
Vol 5 (11) ◽  
pp. 92 ◽  
Author(s):  
Rick Kool ◽  
Judy Lawrence ◽  
Martin Drews ◽  
Robert Bell
Keyword(s):  
Climate Change ◽  
Land Use ◽  
New Zealand ◽  
Sea Level Rise ◽  
Sea Level ◽  
Local Governments ◽  
Land Use Changes ◽  
Adaptation Option ◽  
Levels Of Service ◽  
Over Time

Sea-level rise increasingly affects low-lying and exposed coastal communities due to climate change. These communities rely upon the delivery of stormwater and wastewater services which are often co-located underground in coastal areas. Due to sea-level rise and associated compounding climate-related hazards, managing these networks will progressively challenge local governments as climate change advances. Thus, responsible agencies must reconcile maintaining Levels of Service as the impacts of climate change worsen over the coming decades and beyond. A critical question is whether such networks can continue to be adapted/protected over time to retain Levels of Service, or whether eventual retreat may be the only viable adaptation option? If so, at what performance threshold? In this paper, we explore these questions for stormwater and wastewater, using a dynamic adaptive pathway planning (DAPP) approach designed to address thresholds and increasing risk over time. Involving key local stakeholders, we here use DAPP to identify thresholds for stormwater and wastewater services and retreat options, and for developing a comprehensive and area-specific retreat strategy comprising pathway portfolios, retreat phases, potential land use changes, and for exploring pathway conflicts and synergies. The result is a prototype for an area near Wellington, New Zealand, where a managed retreat of water infrastructure is being considered at some future juncture. Dynamic adaptive strategies for managed retreats can help to reduce future disruption from coastal flooding, signal land use changes early, inform maintenance, and allow for gradual budget adjustments by the agencies that can manage expenditure over time. We present this stepwise process in a pathway form that can be communicated spatially and visually, thereby making a retreat a more manageable, sequenced, adaptation option for water agencies, and the communities they serve.

A 20th century acceleration in global sea-level rise

2006 ◽  
Vol 33 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
John A. Church ◽  
Neil J. White
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century ◽  
Global Sea Level

scholarly journals Spatial variability of late Holocene and 20th century sea-level rise along the Atlantic coast of the United States

Geology ◽  
2009 ◽  
Vol 37 (12) ◽  
pp. 1115-1118 ◽  
Author(s):  
S. E. Engelhart ◽  
B. P. Horton ◽  
B. C. Douglas ◽  
W. R. Peltier ◽  
T. E. Tornqvist
Keyword(s):  
United States ◽  
Spatial Variability ◽  
Sea Level Rise ◽  
Sea Level ◽  
20Th Century ◽  
Late Holocene ◽  
Atlantic Coast ◽  
The United States

scholarly journals Public understanding of climate change-related sea-level rise

2021 ◽  
Author(s):  
Rebecca Priestley ◽  
Zoë Heine ◽  
Taciano L Milfont
Keyword(s):  
Climate Change ◽  
New Zealand ◽  
Sea Level Rise ◽  
Sea Level ◽  
Public Understanding ◽  
Mitigation Measures ◽  
Causal Mechanism ◽  
The Public ◽  
Scientific Consensus ◽  
Adaptation And Mitigation

Sea-level rise resulting from climate change is impacting coasts around the planet. There is strong scientific consensus about the amount of sea-level rise to 2050 (0.24–0.32 m) and a range of projections to 2100, which vary depending on the approach used and the mitigation measures taken to reduce carbon emissions. Despite this strong scientific consensus regarding the reality of climate change-related sea-level rise, and the associated need to engage publics in adaptation and mitigation efforts, there is a lack of empirical evidence regarding people’s understanding of the issue. Here we investigate public understanding of the amount, rate and causes of sea-level rise. Data from a representative sample of New Zealand adults showed a suprising tendency for the public to overestimate the scientifically plausible amount of sea-level rise by 2100 and to identify melting sea ice as its primary causal mechanism. These findings will be valuable for scientists communicating about sea-level rise, communicators seeking to engage publics on the issue of sea-level rise, and media reporting on sea-level rise.

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