datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv
Accelerating erosion of the Alaska Beaufort Sea coast is increasing inputs of organic matter from land to the Arctic Ocean, and improved estimates of organic matter stocks in eroding coastal permafrost are needed to assess their mobilization rates under contemporary conditions. We collected three pe...
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Online Access: | https://doi.org/10.3389/feart.2020.598933.s001 https://figshare.com/articles/dataset/datasheet1_Geochemistry_of_Coastal_Permafrost_and_Erosion-Driven_Organic_Matter_Fluxes_to_the_Beaufort_Sea_Near_Drew_Point_Alaska_csv/13580402 |
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ftfrontimediafig:oai:figshare.com:article/13580402 2023-05-15T15:19:20+02:00 datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv Emily M. Bristol Craig T. Connolly Thomas D. Lorenson Bruce M. Richmond Anastasia G. Ilgen R. Charles Choens Diana L. Bull Mikhail Kanevskiy Go Iwahana Benjamin M. Jones James W. McClelland 2021-01-15T08:50:53Z https://doi.org/10.3389/feart.2020.598933.s001 https://figshare.com/articles/dataset/datasheet1_Geochemistry_of_Coastal_Permafrost_and_Erosion-Driven_Organic_Matter_Fluxes_to_the_Beaufort_Sea_Near_Drew_Point_Alaska_csv/13580402 unknown doi:10.3389/feart.2020.598933.s001 https://figshare.com/articles/dataset/datasheet1_Geochemistry_of_Coastal_Permafrost_and_Erosion-Driven_Organic_Matter_Fluxes_to_the_Beaufort_Sea_Near_Drew_Point_Alaska_csv/13580402 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change coastal erosion carbon flux nitrogen flux porewater chemistry permafost biogeochemistry Alaskan Beaufort Sea Dataset 2021 ftfrontimediafig https://doi.org/10.3389/feart.2020.598933.s001 2021-01-20T23:59:28Z Accelerating erosion of the Alaska Beaufort Sea coast is increasing inputs of organic matter from land to the Arctic Ocean, and improved estimates of organic matter stocks in eroding coastal permafrost are needed to assess their mobilization rates under contemporary conditions. We collected three permafrost cores (4.5–7.5 m long) along a geomorphic gradient near Drew Point, Alaska, where recent erosion rates average 17.2 m year −1 . Down-core patterns indicate that organic-rich soils and lacustrine sediments (12–45% total organic carbon; TOC) in the active layer and upper permafrost accumulated during the Holocene. Deeper permafrost (below 3 m elevation) mainly consists of Late Pleistocene marine sediments with lower organic matter content (∼1% TOC), lower C:N ratios, and higher δ 13 C values. Radiocarbon-based estimates of organic carbon accumulation rates were 11.3 ± 3.6 g TOC m −2 year −1 during the Holocene and 0.5 ± 0.1 g TOC m −2 year −1 during the Late Pleistocene (12–38 kyr BP). Within relict marine sediments, porewater salinities increased with depth. Elevated salinity near sea level (∼20–37 in thawed samples) inhibited freezing despite year-round temperatures below 0°C. We used organic matter stock estimates from the cores in combination with remote sensing time-series data to estimate carbon fluxes for a 9 km stretch of coastline near Drew Point. Erosional fluxes of TOC averaged 1,369 kg C m −1 year −1 during the 21st century (2002–2018), nearly doubling the average flux of the previous half-century (1955–2002). Our estimate of the 21st century erosional TOC flux year −1 from this 9 km coastline (12,318 metric tons C year −1 ) is similar to the annual TOC flux from the Kuparuk River, which drains a 8,107 km 2 area east of Drew Point and ranks as the third largest river on the North Slope of Alaska. Total nitrogen fluxes via coastal erosion at Drew Point were also quantified, and were similar to those from the Kuparuk River. This study emphasizes that coastal erosion represents a significant pathway ... Dataset Arctic Arctic Ocean Beaufort Sea Climate change north slope permafrost Alaska Frontiers: Figshare Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change coastal erosion carbon flux nitrogen flux porewater chemistry permafost biogeochemistry Alaskan Beaufort Sea |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change coastal erosion carbon flux nitrogen flux porewater chemistry permafost biogeochemistry Alaskan Beaufort Sea Emily M. Bristol Craig T. Connolly Thomas D. Lorenson Bruce M. Richmond Anastasia G. Ilgen R. Charles Choens Diana L. Bull Mikhail Kanevskiy Go Iwahana Benjamin M. Jones James W. McClelland datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change coastal erosion carbon flux nitrogen flux porewater chemistry permafost biogeochemistry Alaskan Beaufort Sea |
description |
Accelerating erosion of the Alaska Beaufort Sea coast is increasing inputs of organic matter from land to the Arctic Ocean, and improved estimates of organic matter stocks in eroding coastal permafrost are needed to assess their mobilization rates under contemporary conditions. We collected three permafrost cores (4.5–7.5 m long) along a geomorphic gradient near Drew Point, Alaska, where recent erosion rates average 17.2 m year −1 . Down-core patterns indicate that organic-rich soils and lacustrine sediments (12–45% total organic carbon; TOC) in the active layer and upper permafrost accumulated during the Holocene. Deeper permafrost (below 3 m elevation) mainly consists of Late Pleistocene marine sediments with lower organic matter content (∼1% TOC), lower C:N ratios, and higher δ 13 C values. Radiocarbon-based estimates of organic carbon accumulation rates were 11.3 ± 3.6 g TOC m −2 year −1 during the Holocene and 0.5 ± 0.1 g TOC m −2 year −1 during the Late Pleistocene (12–38 kyr BP). Within relict marine sediments, porewater salinities increased with depth. Elevated salinity near sea level (∼20–37 in thawed samples) inhibited freezing despite year-round temperatures below 0°C. We used organic matter stock estimates from the cores in combination with remote sensing time-series data to estimate carbon fluxes for a 9 km stretch of coastline near Drew Point. Erosional fluxes of TOC averaged 1,369 kg C m −1 year −1 during the 21st century (2002–2018), nearly doubling the average flux of the previous half-century (1955–2002). Our estimate of the 21st century erosional TOC flux year −1 from this 9 km coastline (12,318 metric tons C year −1 ) is similar to the annual TOC flux from the Kuparuk River, which drains a 8,107 km 2 area east of Drew Point and ranks as the third largest river on the North Slope of Alaska. Total nitrogen fluxes via coastal erosion at Drew Point were also quantified, and were similar to those from the Kuparuk River. This study emphasizes that coastal erosion represents a significant pathway ... |
format |
Dataset |
author |
Emily M. Bristol Craig T. Connolly Thomas D. Lorenson Bruce M. Richmond Anastasia G. Ilgen R. Charles Choens Diana L. Bull Mikhail Kanevskiy Go Iwahana Benjamin M. Jones James W. McClelland |
author_facet |
Emily M. Bristol Craig T. Connolly Thomas D. Lorenson Bruce M. Richmond Anastasia G. Ilgen R. Charles Choens Diana L. Bull Mikhail Kanevskiy Go Iwahana Benjamin M. Jones James W. McClelland |
author_sort |
Emily M. Bristol |
title |
datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
title_short |
datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
title_full |
datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
title_fullStr |
datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
title_full_unstemmed |
datasheet1_Geochemistry of Coastal Permafrost and Erosion-Driven Organic Matter Fluxes to the Beaufort Sea Near Drew Point, Alaska.csv |
title_sort |
datasheet1_geochemistry of coastal permafrost and erosion-driven organic matter fluxes to the beaufort sea near drew point, alaska.csv |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2020.598933.s001 https://figshare.com/articles/dataset/datasheet1_Geochemistry_of_Coastal_Permafrost_and_Erosion-Driven_Organic_Matter_Fluxes_to_the_Beaufort_Sea_Near_Drew_Point_Alaska_csv/13580402 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Beaufort Sea Climate change north slope permafrost Alaska |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Climate change north slope permafrost Alaska |
op_relation |
doi:10.3389/feart.2020.598933.s001 https://figshare.com/articles/dataset/datasheet1_Geochemistry_of_Coastal_Permafrost_and_Erosion-Driven_Organic_Matter_Fluxes_to_the_Beaufort_Sea_Near_Drew_Point_Alaska_csv/13580402 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2020.598933.s001 |
_version_ |
1766349516798164992 |