globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.04.016
Scopus记录号: 2-s2.0-84965082426
论文题名:
Relative sea-level change in northeastern Florida (USA) during the last ~8.0 ka
作者: Hawkes A.D.; Kemp A.C.; Donnelly J.P.; Horton B.P.; Peltier W.R.; Cahill N.; Hill D.F.; Ashe E.; Alexander C.R.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 142
起始页码: 90
结束页码: 101
语种: 英语
英文关键词: Foraminifera ; Georgia ; Holocene ; Salt marsh ; St. Marys River
Scopus关键词: Biological materials preservation ; Glaciers ; Ice ; Repair ; Tides ; Wetlands ; Foraminifera ; Georgia ; Holocenes ; Laurentide ice sheets ; Model reconstruction ; Paleoclimate change ; Relative sea-level changes ; Salt marshes ; Sea level ; baseflow ; coastal zone ; database ; foraminifera ; highstand ; Holocene ; Laurentide Ice Sheet ; paleoclimate ; radiocarbon dating ; reconstruction ; saltmarsh ; sampling ; sea level change ; Atlantic Ocean ; Florida [United States] ; Georgia ; Saint Marys River ; United States ; Foraminifera
英文摘要: An existing database of relative sea-level (RSL) reconstructions from the U.S. Atlantic coast lacked valid sea-level index points from Georgia and Florida. This region lies on the edge of the collapsing forebulge of the former Laurentide Ice Sheet making it an important location for understanding glacio-isostatic adjustment and the history of ice-sheet melt. To address the paucity of data, we reconstruct RSL in northeastern Florida (St. Marys) over the last ~8.0 ka from samples of basal salt-marsh sediment that minimize the influence of compaction. The analogy between modern salt-marsh foraminifera and their fossil counterparts preserved in the sedimentary record was used to estimate paleomarsh surface elevation. Sample ages were determined by radiocarbon dating of identifiable and in-situ plant macrofossils. This approach yielded 25 new sea-level index points that constrain a ~5.7 m rise in RSL during the last ~8.0 ka. The record shows that no highstand in sea level occurred in this region over the period of the reconstruction. We compared the new reconstruction to Earth-ice models ICE 6G-C VM5a and ICE 6G-C VM6. There is good fit in the later part of the Holocene with VM5a and for a brief time in the earlier Holocene with VM6. However, there are discrepancies in model-reconstruction fit in the early to mid Holocene in northeastern Florida and elsewhere along the Atlantic coast at locations with early Holocene RSL reconstructions. The most pronounced feature of the new reconstruction is a slow down in the rate of RSL rise from approximately 5.0 to 3.0 ka. This trend may reflect a significant contribution from local-scale processes such as tidal-range change and/or change in base flow of the St. Marys River in response to paleoclimate changes. However, the spatial expression (local vs. regional) of this slow down is undetermined and corroborative records are needed to establish its geographical extent. © 2016 Elsevier Ltd.
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被引频次[WOS]:22   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59590
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geography and Geology, University of North Carolina Wilmington, Wilmington, NC, United States; Department of Earth and Ocean Sciences, Tufts University, Medford, MA, United States; Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Institute of Marine Science and Coastal Sciences, Rutgers University, New Brunswick, NJ, United States; Division of Earth Sciences, Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Department of Physics, University of Toronto, Toronto, ON, Canada; School of Mathematical Sciences (Statistics), Complex Adaptive Systems Laboratory, University College Dublin, Dublin 4, Ireland; School of Civil and Construction Engineering, Oregon State University, Corvallis, OR, United States; Department of Statistics and Biostatistics, Rutgers University, Piscataway, NJ, United States; CCICADA Command, Control and Interoperability Center for Advanced Data Analysis, A Department of Homeland Security Center of Excellence, United States; Skidaway Institute of Oceanography, The University of Georgia, Savannah, GA, United States

Recommended Citation:
Hawkes A.D.,Kemp A.C.,Donnelly J.P.,et al. Relative sea-level change in northeastern Florida (USA) during the last ~8.0 ka[J]. Quaternary Science Reviews,2016-01-01,142
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