Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean
We studied time-series fluxes of diatom particles from 4 October 2010 to 18 September 2012 using bottom-tethered moorings with two sediment traps deployed at 180 and 1300 m depths at Station NAP (75° N, 162° W; 1975 m water depth) in the western Arctic Ocean. This paper discusses on the relationship...
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ftcopernicus:oai:publications.copernicus.org:bg26899 2023-05-15T14:57:45+02:00 Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean Onodera, J. Watanabe, E. Harada, N. Honda, M. C. 2018-09-27 application/pdf https://doi.org/10.5194/bg-12-1373-2015 https://www.biogeosciences.net/12/1373/2015/ eng eng doi:10.5194/bg-12-1373-2015 https://www.biogeosciences.net/12/1373/2015/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-12-1373-2015 2019-12-24T09:53:43Z We studied time-series fluxes of diatom particles from 4 October 2010 to 18 September 2012 using bottom-tethered moorings with two sediment traps deployed at 180 and 1300 m depths at Station NAP (75° N, 162° W; 1975 m water depth) in the western Arctic Ocean. This paper discusses on the relationship of time-series diatom fluxes to satellite-based sea-ice motion and simulated hydrographic variations. We observed clear maxima of the diatom valve flux in November–December of both 2010 and 2011, and in August 2011. Diatoms in samples were categorized into 98 taxa. The diatom flux maxima were characterized by many resting spores in November–December and by the sea-ice-associated diatom Fossula arctica in August 2011. These assemblages along with abundant clay minerals in the samples suggest a significant influence of shelf-origin materials transported by mesoscale eddies, which developed along the Chukchi Sea shelf break. In contrast, the fluxes of total mass and diatoms were reduced in summer 2012. We hypothesize that this suppression reflects the influx of oligotrophic water originating from the central Canada Basin. A physical oceanographic model demonstrated that oligotrophic surface water from the Beaufort Gyre was supplied to Station NAP from December 2011 to the early half of 2012. Text Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Canada Chukchi Sea Northwind Abyssal Plain ENVELOPE(-159.630,-159.630,74.878,74.878) Biogeosciences 12 5 1373 1385 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
We studied time-series fluxes of diatom particles from 4 October 2010 to 18 September 2012 using bottom-tethered moorings with two sediment traps deployed at 180 and 1300 m depths at Station NAP (75° N, 162° W; 1975 m water depth) in the western Arctic Ocean. This paper discusses on the relationship of time-series diatom fluxes to satellite-based sea-ice motion and simulated hydrographic variations. We observed clear maxima of the diatom valve flux in November–December of both 2010 and 2011, and in August 2011. Diatoms in samples were categorized into 98 taxa. The diatom flux maxima were characterized by many resting spores in November–December and by the sea-ice-associated diatom Fossula arctica in August 2011. These assemblages along with abundant clay minerals in the samples suggest a significant influence of shelf-origin materials transported by mesoscale eddies, which developed along the Chukchi Sea shelf break. In contrast, the fluxes of total mass and diatoms were reduced in summer 2012. We hypothesize that this suppression reflects the influx of oligotrophic water originating from the central Canada Basin. A physical oceanographic model demonstrated that oligotrophic surface water from the Beaufort Gyre was supplied to Station NAP from December 2011 to the early half of 2012. |
format |
Text |
author |
Onodera, J. Watanabe, E. Harada, N. Honda, M. C. |
spellingShingle |
Onodera, J. Watanabe, E. Harada, N. Honda, M. C. Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
author_facet |
Onodera, J. Watanabe, E. Harada, N. Honda, M. C. |
author_sort |
Onodera, J. |
title |
Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
title_short |
Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
title_full |
Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
title_fullStr |
Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
title_full_unstemmed |
Diatom flux reflects water-mass conditions on the southern Northwind Abyssal Plain, Arctic Ocean |
title_sort |
diatom flux reflects water-mass conditions on the southern northwind abyssal plain, arctic ocean |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-12-1373-2015 https://www.biogeosciences.net/12/1373/2015/ |
long_lat |
ENVELOPE(-159.630,-159.630,74.878,74.878) |
geographic |
Arctic Arctic Ocean Canada Chukchi Sea Northwind Abyssal Plain |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Sea Northwind Abyssal Plain |
genre |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Sea ice |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-12-1373-2015 https://www.biogeosciences.net/12/1373/2015/ |
op_doi |
https://doi.org/10.5194/bg-12-1373-2015 |
container_title |
Biogeosciences |
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12 |
container_issue |
5 |
container_start_page |
1373 |
op_container_end_page |
1385 |
_version_ |
1766329872204955648 |