Intense summer Si-recycling in the surface Southern Ocean
Si-cycle in surface waters was investigated in summer 2003 during a transect conducted from south-Australia to Antarctica. Diatoms dominated the microphytoplankton. Silicic acid was depleted up to 60degreesS; a subsurface maximum of biogenic silica (= biosilica) was observed in the Permanent Open Oc...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2004
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00226/33719/32139.pdf https://doi.org/10.1029/2003GL018998 https://archimer.ifremer.fr/doc/00226/33719/ |
id |
ftarchimer:oai:archimer.ifremer.fr:33719 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:33719 2023-05-15T13:50:49+02:00 Intense summer Si-recycling in the surface Southern Ocean Beucher, Charlotte Treguer, Paul Hapette, Ana-maria Corvaisier, Rudolph Metzl, Nicolas Pichon, Jean-jacques 2004-05-16 application/pdf https://archimer.ifremer.fr/doc/00226/33719/32139.pdf https://doi.org/10.1029/2003GL018998 https://archimer.ifremer.fr/doc/00226/33719/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00226/33719/32139.pdf doi:10.1029/2003GL018998 https://archimer.ifremer.fr/doc/00226/33719/ Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2004-05-16 , Vol. 31 , N. 9 , P. 1-4 text Publication info:eu-repo/semantics/article 2004 ftarchimer https://doi.org/10.1029/2003GL018998 2021-09-23T20:25:10Z Si-cycle in surface waters was investigated in summer 2003 during a transect conducted from south-Australia to Antarctica. Diatoms dominated the microphytoplankton. Silicic acid was depleted up to 60degreesS; a subsurface maximum of biogenic silica (= biosilica) was observed in the Permanent Open Ocean Zone. In the 100-0.01% light zone, the ratio of depth-integrated biosilica dissolution rate ( D) to depth-integrated biosilica production rate ( P) ranged between 0 to 3.1, being > 1 for 5 of our 6 stations. The biosilica dissolution was related to the percentage of dead diatoms but not to the temperature and might be, at least partially, under bacteria mediation. This study shows that during summer the Southern Ocean silicate pump can be much less efficient than usually expected. Existence of scenarios with intense surface Si-recycling in the Southern Ocean has major consequences both for modelers and paleoceanographers. Article in Journal/Newspaper Antarc* Antarctica Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Geophysical Research Letters 31 9 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Si-cycle in surface waters was investigated in summer 2003 during a transect conducted from south-Australia to Antarctica. Diatoms dominated the microphytoplankton. Silicic acid was depleted up to 60degreesS; a subsurface maximum of biogenic silica (= biosilica) was observed in the Permanent Open Ocean Zone. In the 100-0.01% light zone, the ratio of depth-integrated biosilica dissolution rate ( D) to depth-integrated biosilica production rate ( P) ranged between 0 to 3.1, being > 1 for 5 of our 6 stations. The biosilica dissolution was related to the percentage of dead diatoms but not to the temperature and might be, at least partially, under bacteria mediation. This study shows that during summer the Southern Ocean silicate pump can be much less efficient than usually expected. Existence of scenarios with intense surface Si-recycling in the Southern Ocean has major consequences both for modelers and paleoceanographers. |
format |
Article in Journal/Newspaper |
author |
Beucher, Charlotte Treguer, Paul Hapette, Ana-maria Corvaisier, Rudolph Metzl, Nicolas Pichon, Jean-jacques |
spellingShingle |
Beucher, Charlotte Treguer, Paul Hapette, Ana-maria Corvaisier, Rudolph Metzl, Nicolas Pichon, Jean-jacques Intense summer Si-recycling in the surface Southern Ocean |
author_facet |
Beucher, Charlotte Treguer, Paul Hapette, Ana-maria Corvaisier, Rudolph Metzl, Nicolas Pichon, Jean-jacques |
author_sort |
Beucher, Charlotte |
title |
Intense summer Si-recycling in the surface Southern Ocean |
title_short |
Intense summer Si-recycling in the surface Southern Ocean |
title_full |
Intense summer Si-recycling in the surface Southern Ocean |
title_fullStr |
Intense summer Si-recycling in the surface Southern Ocean |
title_full_unstemmed |
Intense summer Si-recycling in the surface Southern Ocean |
title_sort |
intense summer si-recycling in the surface southern ocean |
publisher |
Amer Geophysical Union |
publishDate |
2004 |
url |
https://archimer.ifremer.fr/doc/00226/33719/32139.pdf https://doi.org/10.1029/2003GL018998 https://archimer.ifremer.fr/doc/00226/33719/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2004-05-16 , Vol. 31 , N. 9 , P. 1-4 |
op_relation |
https://archimer.ifremer.fr/doc/00226/33719/32139.pdf doi:10.1029/2003GL018998 https://archimer.ifremer.fr/doc/00226/33719/ |
op_rights |
Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2003GL018998 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
9 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766254122501144576 |