Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada
Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow...
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ftmdpi:oai:mdpi.com:/2077-1312/10/11/1589/ 2023-08-20T04:03:52+02:00 Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada Boris Radosavljevic Hugues Lantuit Christian Knoblauch Nicole Couture Ulrike Herzschuh Michael Fritz agris 2022-10-27 application/pdf https://doi.org/10.3390/jmse10111589 EN eng Multidisciplinary Digital Publishing Institute Geological Oceanography https://dx.doi.org/10.3390/jmse10111589 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 10; Issue 11; Pages: 1589 permafrost Arctic Ocean stable carbon isotopes nitrogen sediment chemistry sediment dynamics Beaufort Sea grain size Text 2022 ftmdpi https://doi.org/10.3390/jmse10111589 2023-08-01T07:04:25Z Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow arctic nearshore zone. Spatial characteristics of nearshore sediment texture (moderately to poorly sorted silt) are dictated by hydrodynamic processes, but ice-related processes also play a role. We determined organic matter (OM) distribution and inferred the origin and quality of organic carbon by C/N ratios and stable carbon isotopes δ13C. The carbon content was higher offshore and in sheltered areas (mean: 1.0 wt.%., S.D.: 0.9) and the C/N ratios also showed a similar spatial pattern (mean: 11.1, S.D.: 3.1), while the δ13C (mean: −26.4‰ VPDB, S.D.: 0.4) distribution was more complex. We compared the geochemical parameters of our study with terrestrial and marine samples from other studies using a bootstrap approach. Sediments of the current study contained 6.5 times and 1.8 times less total organic carbon than undisturbed and disturbed terrestrial sediments, respectively. Therefore, degradation of OM and separation of carbon pools take place on land and continue in the nearshore zone, where OM is leached, mineralized, or transported beyond the study area. Text Arctic Arctic Ocean Beaufort Sea Herschel Island Ice permafrost MDPI Open Access Publishing Arctic Arctic Ocean Canada Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Journal of Marine Science and Engineering 10 11 1589 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
permafrost Arctic Ocean stable carbon isotopes nitrogen sediment chemistry sediment dynamics Beaufort Sea grain size |
spellingShingle |
permafrost Arctic Ocean stable carbon isotopes nitrogen sediment chemistry sediment dynamics Beaufort Sea grain size Boris Radosavljevic Hugues Lantuit Christian Knoblauch Nicole Couture Ulrike Herzschuh Michael Fritz Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
topic_facet |
permafrost Arctic Ocean stable carbon isotopes nitrogen sediment chemistry sediment dynamics Beaufort Sea grain size |
description |
Increasing arctic coastal erosion rates imply a greater release of sediments and organic matter into the coastal zone. With 213 sediment samples taken around Herschel Island—Qikiqtaruk, Canadian Beaufort Sea, we aimed to gain new insights on sediment dynamics and geochemical properties of a shallow arctic nearshore zone. Spatial characteristics of nearshore sediment texture (moderately to poorly sorted silt) are dictated by hydrodynamic processes, but ice-related processes also play a role. We determined organic matter (OM) distribution and inferred the origin and quality of organic carbon by C/N ratios and stable carbon isotopes δ13C. The carbon content was higher offshore and in sheltered areas (mean: 1.0 wt.%., S.D.: 0.9) and the C/N ratios also showed a similar spatial pattern (mean: 11.1, S.D.: 3.1), while the δ13C (mean: −26.4‰ VPDB, S.D.: 0.4) distribution was more complex. We compared the geochemical parameters of our study with terrestrial and marine samples from other studies using a bootstrap approach. Sediments of the current study contained 6.5 times and 1.8 times less total organic carbon than undisturbed and disturbed terrestrial sediments, respectively. Therefore, degradation of OM and separation of carbon pools take place on land and continue in the nearshore zone, where OM is leached, mineralized, or transported beyond the study area. |
format |
Text |
author |
Boris Radosavljevic Hugues Lantuit Christian Knoblauch Nicole Couture Ulrike Herzschuh Michael Fritz |
author_facet |
Boris Radosavljevic Hugues Lantuit Christian Knoblauch Nicole Couture Ulrike Herzschuh Michael Fritz |
author_sort |
Boris Radosavljevic |
title |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_short |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_full |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_fullStr |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_full_unstemmed |
Arctic Nearshore Sediment Dynamics—An Example from Herschel Island—Qikiqtaruk, Canada |
title_sort |
arctic nearshore sediment dynamics—an example from herschel island—qikiqtaruk, canada |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/jmse10111589 |
op_coverage |
agris |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Arctic Ocean Canada Herschel Island |
geographic_facet |
Arctic Arctic Ocean Canada Herschel Island |
genre |
Arctic Arctic Ocean Beaufort Sea Herschel Island Ice permafrost |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Herschel Island Ice permafrost |
op_source |
Journal of Marine Science and Engineering; Volume 10; Issue 11; Pages: 1589 |
op_relation |
Geological Oceanography https://dx.doi.org/10.3390/jmse10111589 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/jmse10111589 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
11 |
container_start_page |
1589 |
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1774714300900835328 |