Reconstructing Holocene sea level using salt-marsh foraminifera and transfer functions: lessons from New Jersey, USA

2013 ◽  
Vol 28 (6) ◽  
pp. 617-629 ◽  
Author(s):  
ANDREW C. KEMP ◽  
RICHARD J. TELFORD ◽  
BENJAMIN P. HORTON ◽  
SHIMON C. ANISFELD ◽  
CHRISTOPHER K. SOMMERFIELD
Keyword(s):  
New Jersey ◽  
Salt Marsh ◽  
Sea Level ◽  
Transfer Functions ◽  
Holocene Sea Level

scholarly journals Late Holocene sea-level change around Newfoundland

2007 ◽  
Vol 44 (10) ◽  
pp. 1453-1465 ◽  
Author(s):  
Julia F Daly ◽  
Daniel F Belknap ◽  
Joseph T Kelley ◽  
Trevor Bell
Keyword(s):  
Salt Marsh ◽  
Sea Level Rise ◽  
Sea Level ◽  
Late Holocene ◽  
Sea Level Change ◽  
Laurentide Ice Sheet ◽  
Change Analysis ◽  
Level Change ◽  
Rising Sea Level ◽  
Holocene Sea Level

Differential sea-level change in formerly glaciated areas is predicted owing to variability in extent and timing of glacial coverage. Newfoundland is situated close to the margin of the former Laurentide ice sheet, and the orientation of the shoreline affords the opportunity to investigate variable rates and magnitudes of sea-level change. Analysis of salt-marsh records at four sites around the island yields late Holocene sea-level trends. These trends indicate differential sea-level change in recent millennia. A north–south geographic trend reflects submergence in the south, very slow sea-level rise in the northeast, and a recent transition from falling to rising sea-level at the base of the Northern Peninsula. This variability is best explained as a continued isostatic response to deglaciation.

scholarly journals Application of stable carbon isotopes for reconstructing salt-marsh floral zones and relative sea level, New Jersey, USA

2011 ◽  
Vol 27 (4) ◽  
pp. 404-414 ◽  
Author(s):  
Andrew C. Kemp ◽  
Christopher H. Vane ◽  
Benjamin P. Horton ◽  
Simon E. Engelhart ◽  
Daria Nikitina
Keyword(s):  
New Jersey ◽  
Salt Marsh ◽  
Sea Level ◽  
Carbon Isotopes ◽  
Stable Carbon Isotopes ◽  
Stable Carbon ◽  
Relative Sea Level

Enough is Enough, or More is More? Testing the Influence of Foraminiferal Count Size on Reconstructions of Paleo-Marsh Elevation

2020 ◽  
Vol 50 (3) ◽  
pp. 266-278
Author(s):  
Andrew C. Kemp ◽  
Alexander J. Wright ◽  
Niamh Cahill
Keyword(s):  
Salt Marsh ◽  
Transfer Function ◽  
Sea Level ◽  
Transfer Functions ◽  
Regional Scale ◽  
Weighted Averaging ◽  
Additional Time ◽  
Modest Improvement ◽  
Large Numbers ◽  
Decadal Scale

ABSTRACT Salt-marsh foraminifera are sea-level proxies used to quantitatively reconstruct Holocene paleo-marsh elevations (PME) and subsequently relative sea level (RSL). The reliability of these reconstructions is partly dependent upon counting enough foraminifera to accurately characterize assemblages, while counting fewer tests allows more samples to be processed. We test the influence of count size on PME reconstructions by repeatedly subsampling foraminiferal assemblages preserved in a core of salt-marsh peat (from Newfoundland, Canada) with unusually large counts (up to 1595). Application of a single, weighted-averaging transfer function developed from a regional-scale modern training set to these ecologically-plausible simulated assemblages generated PME reconstructions at count sizes of 10–700. Reconstructed PMEs stabilize at counts sizes greater than ∼50 and counts exceeding ∼250 tests show little return for the additional time invested. The absence of some rare taxa in low counts is unlikely to markedly influence results from weighted-averaging transfer functions. Subsampling of modern foraminifera indicates that cross-validated transfer function performance shows only modest improvement when more than ∼40 foraminifera are counted. Studies seeking to understand multi-meter and millennial scale RSL trends should count more than ∼50 tests. The precision sought by studies aiming to resolve decimeter- and decadal-scale RSL variability is best achieved with counts greater than ∼75. In most studies seeking to reconstruct PME, effort is more productively allocated by counting relatively fewer foraminifera in more core samples than in counting large numbers of individuals. Target count sizes of 100–300 in existing studies are likely conservative and robust. Given the low diversity of salt-marsh foraminiferal assemblages, our results are likely applicable throughout and beyond northeastern North America.

scholarly journals Quantitative vertical zonation of salt-marsh foraminifera for reconstructing former sea level; an example from New Jersey, USA.

2012 ◽  
Vol 54 ◽  
pp. 26-39 ◽  
Author(s):  
Andrew C. Kemp ◽  
Benjamin P. Horton ◽  
David R. Vann ◽  
Simon E. Engelhart ◽  
Candace A. Grand Pre ◽  
...  
Keyword(s):  
New Jersey ◽  
Salt Marsh ◽  
Sea Level ◽  
Vertical Zonation

scholarly journals Development of a Training Set of Contemporary Salt-Marsh Foraminifera for Late Holocene Sea- Level Reconstructions in southeastern Australia

10.5334/oq.93 ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 4
Author(s):  
Sophie Williams ◽  
Ed Garrett ◽  
Patrick Moss ◽  
Rebecca Bartlett ◽  
Roland Gehrels
Keyword(s):  
Salt Marsh ◽  
Sea Level ◽  
Late Holocene ◽  
Training Set ◽  
Southeastern Australia ◽  
Holocene Sea Level
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