Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling
Seawater rare earth element (REE) concentrations are increasingly applied to reconstruct water mass histories by exploiting relative changes in the distinctive normalised patterns. However, the mechanisms by which water masses gain their patterns are yet to be fully explained. To examine this, we co...
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Online Access: | https://doi.org/10.3389/fmars.2018.00147 |
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ftzenodo:oai:zenodo.org:1323738 2024-09-15T18:13:17+00:00 Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling Crocket, Kirsty Hill, Emily Abell, Richard Johnson, Clare Gary, Stefan Brand, Tim Hathorne, E. 2018-04-30 https://doi.org/10.3389/fmars.2018.00147 unknown Zenodo https://zenodo.org/communities/atlas https://doi.org/10.3389/fmars.2018.00147 oai:zenodo.org:1323738 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Frontiers in Marine Science, 5, (2018-04-30) info:eu-repo/semantics/article 2018 ftzenodo https://doi.org/10.3389/fmars.2018.00147 2024-07-26T23:23:32Z Seawater rare earth element (REE) concentrations are increasingly applied to reconstruct water mass histories by exploiting relative changes in the distinctive normalised patterns. However, the mechanisms by which water masses gain their patterns are yet to be fully explained. To examine this, we collected water samples along the Extended Ellett Line (EEL), an oceanographic transect between Iceland and Scotland, and measured dissolved REE by offline automated chromatography (SeaFAST) and ICP-MS. The proximity to two continental boundaries, the incipient spring bloom coincident with the timing of the cruise, and the importance of deep water circulation in this climatically sensitive gateway region make it an ideal location to investigate sources of REE to seawater and the effects of vertical cycling and lateral advection on their distribution. The deep waters have REE concentrations closest to typical North Atlantic seawater and are dominated by lateral advection. Comparison to published seawater REE concentrations of the same water masses in other locations provides a first measure of the temporal and spatial stability of the seawater REE signal. We demonstrate the REE pattern is replicated for Iceland-Scotland OverflowWater (ISOW) in the Iceland Basin from adjacent stations sampled 16 years previously. A recently published Labrador Sea Water (LSW) dissolved REE signal is reproduced in the Rockall Trough but shows greater light and mid REE alteration in the Iceland Basin, possibly due to the dominant effect of ISOW and/or continental inputs. An obvious concentration gradient from seafloor sediments to the overlying water column in the Rockall Trough, but not the Iceland Basin, highlights release of light and mid REE from resuspended sediments and pore waters, possibly a seasonal effect associated with the timing of the spring bloom in each basin. The EEL dissolved oxygen minimum at the permanent pycnocline corresponds to positive heavy REE enrichment, indicating maximum rates of organic matter remineralisation ... Article in Journal/Newspaper Iceland Labrador Sea North Atlantic Zenodo Frontiers in Marine Science 5 |
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description |
Seawater rare earth element (REE) concentrations are increasingly applied to reconstruct water mass histories by exploiting relative changes in the distinctive normalised patterns. However, the mechanisms by which water masses gain their patterns are yet to be fully explained. To examine this, we collected water samples along the Extended Ellett Line (EEL), an oceanographic transect between Iceland and Scotland, and measured dissolved REE by offline automated chromatography (SeaFAST) and ICP-MS. The proximity to two continental boundaries, the incipient spring bloom coincident with the timing of the cruise, and the importance of deep water circulation in this climatically sensitive gateway region make it an ideal location to investigate sources of REE to seawater and the effects of vertical cycling and lateral advection on their distribution. The deep waters have REE concentrations closest to typical North Atlantic seawater and are dominated by lateral advection. Comparison to published seawater REE concentrations of the same water masses in other locations provides a first measure of the temporal and spatial stability of the seawater REE signal. We demonstrate the REE pattern is replicated for Iceland-Scotland OverflowWater (ISOW) in the Iceland Basin from adjacent stations sampled 16 years previously. A recently published Labrador Sea Water (LSW) dissolved REE signal is reproduced in the Rockall Trough but shows greater light and mid REE alteration in the Iceland Basin, possibly due to the dominant effect of ISOW and/or continental inputs. An obvious concentration gradient from seafloor sediments to the overlying water column in the Rockall Trough, but not the Iceland Basin, highlights release of light and mid REE from resuspended sediments and pore waters, possibly a seasonal effect associated with the timing of the spring bloom in each basin. The EEL dissolved oxygen minimum at the permanent pycnocline corresponds to positive heavy REE enrichment, indicating maximum rates of organic matter remineralisation ... |
format |
Article in Journal/Newspaper |
author |
Crocket, Kirsty Hill, Emily Abell, Richard Johnson, Clare Gary, Stefan Brand, Tim Hathorne, E. |
spellingShingle |
Crocket, Kirsty Hill, Emily Abell, Richard Johnson, Clare Gary, Stefan Brand, Tim Hathorne, E. Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
author_facet |
Crocket, Kirsty Hill, Emily Abell, Richard Johnson, Clare Gary, Stefan Brand, Tim Hathorne, E. |
author_sort |
Crocket, Kirsty |
title |
Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
title_short |
Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
title_full |
Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
title_fullStr |
Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
title_full_unstemmed |
Rare Earth Element distribution in the NE Atlantic: Evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
title_sort |
rare earth element distribution in the ne atlantic: evidence for benthic sources, longevity of the seawater signal, and biogeochemical cycling |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00147 |
genre |
Iceland Labrador Sea North Atlantic |
genre_facet |
Iceland Labrador Sea North Atlantic |
op_source |
Frontiers in Marine Science, 5, (2018-04-30) |
op_relation |
https://zenodo.org/communities/atlas https://doi.org/10.3389/fmars.2018.00147 oai:zenodo.org:1323738 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3389/fmars.2018.00147 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1810450927246639104 |