Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles
Particulate organic carbon (POC) in the ocean often exhibits more depleted radiocarbon contents (lower Δ 14C values) than expected if its sole source were POC recently synthesized by primary production and export from the overlying surface waters. An examination of available Δ14C data sets for sinki...
Published in: | Global Biogeochemical Cycles |
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Language: | English |
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ftcdlib:qt5qw249mf 2023-05-15T15:08:39+02:00 Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles Hwang, Jeomshik Druffel, Ellen R. M Eglinton, Timothy I n/a - n/a 2010-12-01 application/pdf http://www.escholarship.org/uc/item/5qw249mf english eng eScholarship, University of California qt5qw249mf http://www.escholarship.org/uc/item/5qw249mf Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Hwang, Jeomshik; Druffel, Ellen R. M; & Eglinton, Timothy I. (2010). Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles. Global Biogeochemical Cycles, 24(4), n/a - n/a. doi:10.1029/2010GB003802. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/5qw249mf Physical Sciences and Mathematics equatorial pacific-ocean middle atlantic bight deep-water column continental-shelf northeast pacific lateral particle compound classes arctic-ocean japan sea temporal variability article 2010 ftcdlib https://doi.org/10.1029/2010GB003802 2016-04-02T18:51:53Z Particulate organic carbon (POC) in the ocean often exhibits more depleted radiocarbon contents (lower Δ 14C values) than expected if its sole source were POC recently synthesized by primary production and export from the overlying surface waters. An examination of available Δ14C data sets for sinking POC show that this phenomenon is both common and globally widespread. Also, a strong correlation is found to exist between Δ14C values of organic carbon and aluminum content in sinking particles that is consistent over a range of oceanic settings. Together, these findings imply that aged organic carbon associated with lithogenic material from sediment resuspension is responsible for the observed low Δ 14C values as opposed to other processes such as incorporation of dissolved inorganic carbon or dissolved organic carbon into POC at depth. An estimate based on POC flux-weighted Δ14C values shows that about 35% of sinking POC at the locations studied is derived from resuspended sediment. Our results suggest that resuspension of sediment and its subsequent lateral transport is an important component of the oceanic carbon cycle and should be considered in models of oceanic carbon export and burial. Article in Journal/Newspaper Arctic Arctic Ocean University of California: eScholarship Arctic Arctic Ocean Pacific Global Biogeochemical Cycles 24 4 n/a n/a |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
Physical Sciences and Mathematics equatorial pacific-ocean middle atlantic bight deep-water column continental-shelf northeast pacific lateral particle compound classes arctic-ocean japan sea temporal variability |
spellingShingle |
Physical Sciences and Mathematics equatorial pacific-ocean middle atlantic bight deep-water column continental-shelf northeast pacific lateral particle compound classes arctic-ocean japan sea temporal variability Hwang, Jeomshik Druffel, Ellen R. M Eglinton, Timothy I Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
topic_facet |
Physical Sciences and Mathematics equatorial pacific-ocean middle atlantic bight deep-water column continental-shelf northeast pacific lateral particle compound classes arctic-ocean japan sea temporal variability |
description |
Particulate organic carbon (POC) in the ocean often exhibits more depleted radiocarbon contents (lower Δ 14C values) than expected if its sole source were POC recently synthesized by primary production and export from the overlying surface waters. An examination of available Δ14C data sets for sinking POC show that this phenomenon is both common and globally widespread. Also, a strong correlation is found to exist between Δ14C values of organic carbon and aluminum content in sinking particles that is consistent over a range of oceanic settings. Together, these findings imply that aged organic carbon associated with lithogenic material from sediment resuspension is responsible for the observed low Δ 14C values as opposed to other processes such as incorporation of dissolved inorganic carbon or dissolved organic carbon into POC at depth. An estimate based on POC flux-weighted Δ14C values shows that about 35% of sinking POC at the locations studied is derived from resuspended sediment. Our results suggest that resuspension of sediment and its subsequent lateral transport is an important component of the oceanic carbon cycle and should be considered in models of oceanic carbon export and burial. |
format |
Article in Journal/Newspaper |
author |
Hwang, Jeomshik Druffel, Ellen R. M Eglinton, Timothy I |
author_facet |
Hwang, Jeomshik Druffel, Ellen R. M Eglinton, Timothy I |
author_sort |
Hwang, Jeomshik |
title |
Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
title_short |
Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
title_full |
Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
title_fullStr |
Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
title_full_unstemmed |
Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles |
title_sort |
widespread influence of resuspended sediments on oceanic particulate organic carbon: insights from radiocarbon and aluminum contents in sinking particles |
publisher |
eScholarship, University of California |
publishDate |
2010 |
url |
http://www.escholarship.org/uc/item/5qw249mf |
op_coverage |
n/a - n/a |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Hwang, Jeomshik; Druffel, Ellen R. M; & Eglinton, Timothy I. (2010). Widespread influence of resuspended sediments on oceanic particulate organic carbon: Insights from radiocarbon and aluminum contents in sinking particles. Global Biogeochemical Cycles, 24(4), n/a - n/a. doi:10.1029/2010GB003802. UC Irvine: Department of Earth System Science, UCI. Retrieved from: http://www.escholarship.org/uc/item/5qw249mf |
op_relation |
qt5qw249mf http://www.escholarship.org/uc/item/5qw249mf |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2010GB003802 |
container_title |
Global Biogeochemical Cycles |
container_volume |
24 |
container_issue |
4 |
container_start_page |
n/a |
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n/a |
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1766339966441357312 |