USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA
Deconvolving the relationship between meteorological and oceanographic phenomena and associated impacts to coastal systems is critical to understanding the future of coastal systems worldwide. North Carolina's barrier islands, commonly known as the Outer Banks, and the associated Albemarle-Paml...
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ftunivnorthcag:oai:libres.uncg.edu/46395 2024-02-11T10:06:46+01:00 USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA Minnehan, Jeffrey J. NC DOCKS at East Carolina University 2023 http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt English eng http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt Geochemistry;Geology;Black carbon;Carbon sequestration;Holocene;Paleoclimate;Stable isotopes 2023 ftunivnorthcag 2024-01-27T23:49:02Z Deconvolving the relationship between meteorological and oceanographic phenomena and associated impacts to coastal systems is critical to understanding the future of coastal systems worldwide. North Carolina's barrier islands, commonly known as the Outer Banks, and the associated Albemarle-Pamlico estuarine system is an example of a coastal ecosystem that will be affected in the future by such phenomena. Based on sedimentological and micropaleontological proxies, past research suggests that intense storm activity may have caused extensive segmentation of the Outer Banks during the Holocene. To gain a better understanding of meteorological and oceanographic factors affecting the evolution of North Carolina's coastal system, organic geochemical techniques were applied to sediments from two cores collected within Pamlico Sound. Specifically, down-core trends in total organic carbon (TOC), refractory black carbon (BC), refractory soot carbon, labile organic carbon (OC), total nitrogen (TN), and their stable isotopic signatures ([delta]¹³C and [delta]¹5N) were analyzed in order to assess the varying inputs of marine and terrestrial organic matter into Pamlico Sound. In Chapter 1, TOC, BC/TOC, soot/TOC, TOC/TN, and [delta]¹³C[subscript]TOC were compared to a paleoclimatological proxy of El Nin~o Southern Oscillation (ENSO) and interpretations of stages of the North Atlantic Oscillation (NAO) throughout the mid-to-late Holocene. These phenomena have been suggested to influence southeast U.S. temperature, precipitation, and Atlantic hurricanes, all of which ultimately affect barrier island and estuarine evolution, as recorded in Pamlico Sound sediments. In general, there has been little consideration of carbon sequestered in coastal systems throughout the Holocene, a period that shows anthropogenic changes in the carbon cycle. This is an important omission, as most of the sediments exported by the world's major rivers are currently deposited on continental shelves (e.g., deltas and estuaries). Chapter 2 examines how the ... Other/Unknown Material North Atlantic North Atlantic oscillation University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) Barrier Islands ENVELOPE(-92.283,-92.283,62.784,62.784) Barrier Island ENVELOPE(78.396,78.396,-68.431,-68.431) |
institution |
Open Polar |
collection |
University of North Carolina: NC DOCKS (Digital Online Collection of Knowledge and Scholarship) |
op_collection_id |
ftunivnorthcag |
language |
English |
topic |
Geochemistry;Geology;Black carbon;Carbon sequestration;Holocene;Paleoclimate;Stable isotopes |
spellingShingle |
Geochemistry;Geology;Black carbon;Carbon sequestration;Holocene;Paleoclimate;Stable isotopes Minnehan, Jeffrey J. NC DOCKS at East Carolina University USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
topic_facet |
Geochemistry;Geology;Black carbon;Carbon sequestration;Holocene;Paleoclimate;Stable isotopes |
description |
Deconvolving the relationship between meteorological and oceanographic phenomena and associated impacts to coastal systems is critical to understanding the future of coastal systems worldwide. North Carolina's barrier islands, commonly known as the Outer Banks, and the associated Albemarle-Pamlico estuarine system is an example of a coastal ecosystem that will be affected in the future by such phenomena. Based on sedimentological and micropaleontological proxies, past research suggests that intense storm activity may have caused extensive segmentation of the Outer Banks during the Holocene. To gain a better understanding of meteorological and oceanographic factors affecting the evolution of North Carolina's coastal system, organic geochemical techniques were applied to sediments from two cores collected within Pamlico Sound. Specifically, down-core trends in total organic carbon (TOC), refractory black carbon (BC), refractory soot carbon, labile organic carbon (OC), total nitrogen (TN), and their stable isotopic signatures ([delta]¹³C and [delta]¹5N) were analyzed in order to assess the varying inputs of marine and terrestrial organic matter into Pamlico Sound. In Chapter 1, TOC, BC/TOC, soot/TOC, TOC/TN, and [delta]¹³C[subscript]TOC were compared to a paleoclimatological proxy of El Nin~o Southern Oscillation (ENSO) and interpretations of stages of the North Atlantic Oscillation (NAO) throughout the mid-to-late Holocene. These phenomena have been suggested to influence southeast U.S. temperature, precipitation, and Atlantic hurricanes, all of which ultimately affect barrier island and estuarine evolution, as recorded in Pamlico Sound sediments. In general, there has been little consideration of carbon sequestered in coastal systems throughout the Holocene, a period that shows anthropogenic changes in the carbon cycle. This is an important omission, as most of the sediments exported by the world's major rivers are currently deposited on continental shelves (e.g., deltas and estuaries). Chapter 2 examines how the ... |
author |
Minnehan, Jeffrey J. NC DOCKS at East Carolina University |
author_facet |
Minnehan, Jeffrey J. NC DOCKS at East Carolina University |
author_sort |
Minnehan, Jeffrey J. |
title |
USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
title_short |
USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
title_full |
USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
title_fullStr |
USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
title_full_unstemmed |
USING SEDIMENT ORGANIC GEOCHEMISTRY TO INTERPRET LATE HOLOCENE BARRIER ISLAND AND ESTUARINE EVOLUTION, NORTH CAROLINA, USA |
title_sort |
using sediment organic geochemistry to interpret late holocene barrier island and estuarine evolution, north carolina, usa |
publishDate |
2023 |
url |
http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt |
long_lat |
ENVELOPE(-92.283,-92.283,62.784,62.784) ENVELOPE(78.396,78.396,-68.431,-68.431) |
geographic |
Barrier Islands Barrier Island |
geographic_facet |
Barrier Islands Barrier Island |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://libres.uncg.edu/ir/ecu/f/0000-embargo-holder.txt |
_version_ |
1790604716173950976 |