Within-Region Replication Of Late Holocene Relative Sea-Level Change: An Example From Southern New England, United States

Stearns, Rachel B.; Engelhart, Simon E.; Kemp, Andrew C.; Hill, Troy D.; Brain, Matthew J.; Corbett, D. Reide

doi:10.1016/j.quascirev.2022.107868

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Within-Region Replication Of Late Holocene Relative Sea-Level Change: An Example From Southern New England, United States

2023
By Stearns, Rachel B. ; Engelhart, Simon E. ; Kemp, Andrew C. ; ...
Source: Quaternary Science Reviews, 300, 107868

[PDF-4.04 MB]

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Journal Title:

Quaternary Science Reviews
Personal Author:

Stearns, Rachel B. ; Engelhart, Simon E. ; Kemp, Andrew C. ; Hill, Troy D. ; Brain, Matthew J. ; ... More +

Stearns, Rachel B. ; Engelhart, Simon E. ; Kemp, Andrew C. ; Hill, Troy D. ; Brain, Matthew J. ; Corbett, D. Reide Less -
NOAA Program & Office:

Sea Grant
Sea Grant Program:

RIU (Rhode Island Sea Grant)
Description:

Tide-gauge measurements in the western North Atlantic Ocean show coherent, multi-decadal relative sea-level (RSL) trends across multiple spatial scales. Proxy reconstructions developed from salt-marsh sediment can extend this instrumental record. However, the degree of coherence in proxy reconstructions is underexamined through within-region replication. To explore within-region replication, we developed a new RSL reconstruction from Fox Hill Marsh, Rhode Island to complement similar records at nearby sites. We established the elevation of former sea level from assemblages of foraminifera and bulk-sediment δ13C values using a Bayesian transfer function. We employed radiocarbon dating and recognition of pollution horizons to construct a core chronology. Since ∼1200 BCE, RSL rose by ∼3.7 m at Fox Hill Marsh. After correction for glacial isostatic adjustment, application of a statistical model intended to quantify (multi-) century-scale trends showed that the fastest rate of rise in at least the past 3000 years was 1.71 ± 0.84 mm/yr (95% credible interval) in 2020 CE. This result replicates regional tide-gauge measurements and other proxy reconstructions. Using an alternative statistical model constructed to identify sub-centennial sea-level changes, we examined if there was a hotspot of 18th century rise in the northeastern United States and found no spatially-coherent trend (i.e., occurring at all or most sites). This lack of replication indicates that accelerated rise during the 18th century is likely local (site-specific) in scale, or an artifact of individual reconstructions. Continued efforts to replicate RSL reconstructions will increase confidence in the accuracy of records and their subsequent interpretation.
Keywords:

[+]

Archeology Ecology, Evolution, Behavior And Systematics Geology Global And Planetary Change
Source:

Quaternary Science Reviews, 300, 107868
DOI:

https://doi.org/10.1016/j.quascirev.2022.107868
ISSN:

0277-3791
Format:

PDF
Publisher:

Elsevier BV
Document Type:

Journal Article
License:

https://creativecommons.org/licenses/by-nc-nd/4.0/
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CC BY-NC-ND
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Submitted
Main Document Checksum:

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urn:sha256:6052017f86797e14da01ff93f4fc7ae5c42704842e4af815a26c75fd09ccf0fa
Download URL:

https://repository.library.noaa.gov/view/noaa/55368/noaa_55368_DS1.pdf
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Within-Region Replication Of Late Holocene Relative Sea-Level Change: An Example From Southern New England, United States

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