Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific
Dynamics of transparent exopolymer particles (TEP) was studied during the first in situ iron-enrichment experiment conducted in the western subarctic Pacific in July-August 2001, with the goal of evaluating the contribution of TEP to vertical flux as a result of increased primary production followin...
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ftnirs:oai:repo.qst.go.jp:00043653 2023-05-15T18:28:08+02:00 Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific Ramaiah Neelam Takeda Shigenobu Furuya Ken Yoshimura Takeshi Nishioka Jun Aono Tatsuo Nojiri Yukihiro Imai Keiri Kudo Isao Saito Hiroaki Tsuda Atsushi 2005-04 https://repo.qst.go.jp/?action=repository_uri&item_id=43653 http://id.nii.ac.jp/1657/00043640/ en eng https://repo.qst.go.jp/?action=repository_uri&item_id=43653 http://id.nii.ac.jp/1657/00043640/ Progress in Oceanography, 64(2-4), 253-261(2005-04) 0079-6611 Journal Article 2005 ftnirs 2021-12-30T07:35:49Z Dynamics of transparent exopolymer particles (TEP) was studied during the first in situ iron-enrichment experiment conducted in the western subarctic Pacific in July-August 2001, with the goal of evaluating the contribution of TEP to vertical flux as a result of increased primary production following iron enrichment in open ocean ecosystems. Subsequent to the enhancement of phytoplankton production, we observed increase in TEP concentration in the surface layer and sedimentation of organic matter beneath it. Vertical profiles of TEP, chlorophyll a (Chl a) and particulate organic carbon (POC) were obtained from six depths between 5 and 70 m, from a station each located inside and outside the enriched patch. TEP and total mass flux were estimated from the floating sediment traps deployed at 200 m depth. Chl a and TEP concentrations outside the patch varied from 0.2 to 1.9 ug L-1 and 40-60 ug XG equiv. L-1, respectively. Inside the patch, Chl a increased drastically from day 7 reaching the peak of 19.2 ug L-1 on day 13, which coincided with the TEP peak of 189 ug XG equiv. L-1. TEP flux in the sediment trap increased from 41 to 88 mg XG equiv. m-2 d-1, with 8-14% contribution of TEP to total mass flux. This forms the basic data set on ambient concentrations of TEP in the western subarctic Pacific, and evaluation of the effect of iron enrichment on TEP. Article in Journal/Newspaper Subarctic National Institute of Radiological Science: NIRS-Repository Pacific |
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Open Polar |
collection |
National Institute of Radiological Science: NIRS-Repository |
op_collection_id |
ftnirs |
language |
English |
description |
Dynamics of transparent exopolymer particles (TEP) was studied during the first in situ iron-enrichment experiment conducted in the western subarctic Pacific in July-August 2001, with the goal of evaluating the contribution of TEP to vertical flux as a result of increased primary production following iron enrichment in open ocean ecosystems. Subsequent to the enhancement of phytoplankton production, we observed increase in TEP concentration in the surface layer and sedimentation of organic matter beneath it. Vertical profiles of TEP, chlorophyll a (Chl a) and particulate organic carbon (POC) were obtained from six depths between 5 and 70 m, from a station each located inside and outside the enriched patch. TEP and total mass flux were estimated from the floating sediment traps deployed at 200 m depth. Chl a and TEP concentrations outside the patch varied from 0.2 to 1.9 ug L-1 and 40-60 ug XG equiv. L-1, respectively. Inside the patch, Chl a increased drastically from day 7 reaching the peak of 19.2 ug L-1 on day 13, which coincided with the TEP peak of 189 ug XG equiv. L-1. TEP flux in the sediment trap increased from 41 to 88 mg XG equiv. m-2 d-1, with 8-14% contribution of TEP to total mass flux. This forms the basic data set on ambient concentrations of TEP in the western subarctic Pacific, and evaluation of the effect of iron enrichment on TEP. |
format |
Article in Journal/Newspaper |
author |
Ramaiah Neelam Takeda Shigenobu Furuya Ken Yoshimura Takeshi Nishioka Jun Aono Tatsuo Nojiri Yukihiro Imai Keiri Kudo Isao Saito Hiroaki Tsuda Atsushi |
spellingShingle |
Ramaiah Neelam Takeda Shigenobu Furuya Ken Yoshimura Takeshi Nishioka Jun Aono Tatsuo Nojiri Yukihiro Imai Keiri Kudo Isao Saito Hiroaki Tsuda Atsushi Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
author_facet |
Ramaiah Neelam Takeda Shigenobu Furuya Ken Yoshimura Takeshi Nishioka Jun Aono Tatsuo Nojiri Yukihiro Imai Keiri Kudo Isao Saito Hiroaki Tsuda Atsushi |
author_sort |
Ramaiah Neelam |
title |
Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
title_short |
Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
title_full |
Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
title_fullStr |
Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
title_full_unstemmed |
Effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic Pacific |
title_sort |
effect of iron enrichment on the dynamics of transparent exopolymer particles in the western subarctic pacific |
publishDate |
2005 |
url |
https://repo.qst.go.jp/?action=repository_uri&item_id=43653 http://id.nii.ac.jp/1657/00043640/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://repo.qst.go.jp/?action=repository_uri&item_id=43653 http://id.nii.ac.jp/1657/00043640/ Progress in Oceanography, 64(2-4), 253-261(2005-04) 0079-6611 |
_version_ |
1766210487564894208 |