Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer
Seawater samples beneath fast ice were collected from several depths using a Niskin bottle at four sites near Syowa Station, Antarctica, on 30 December 1996, and 12 and 21 January 1997. Vertical distributions of chlorophyll a (Chl a) and nitrate (NO3) concentrations were determined. Substantial temp...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:2b658f0b6aac4fa49a71330c227b8c61 2023-05-15T13:58:47+02:00 Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer Tsuneo Odate Mitsuo Fukuchi 2004-11-01 https://doi.org/10.15094/00009293 https://doaj.org/article/2b658f0b6aac4fa49a71330c227b8c61 en other eng National Institute of Polar Research doi:10.15094/00009293 0085-7289 2432-079X https://doaj.org/article/2b658f0b6aac4fa49a71330c227b8c61 undefined Antarctic Record, Vol 48, Iss 3, Pp 157-164 (2004) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2004 fttriple https://doi.org/10.15094/00009293 2023-01-22T16:34:44Z Seawater samples beneath fast ice were collected from several depths using a Niskin bottle at four sites near Syowa Station, Antarctica, on 30 December 1996, and 12 and 21 January 1997. Vertical distributions of chlorophyll a (Chl a) and nitrate (NO3) concentrations were determined. Substantial temporal changes in Chl a and NO3 concentrations occurred in the surface stratified layer (<20m). There was a significant negative correlation between both the concentrations (n=40, P<0.01). This relationship suggests that an increase of 1μg l-1 of Chl a consumes 0.89μM of NO3 under fast ice. However, light limitation is severe for phytoplankton growing under thick sea ice (2.0-3.6m), as observed in the present study. It is unlikely that the observed increases of Chl a result from phytoplankton growth under heavy fast ice. Seawater, in which Chl a has increased and NO3 has been consumed under favorable light conditions, may be advected into the study area. This advection may be responsible for the apparent increase of Chl a and decrease of NO3 concentrations under the heavy fast ice. Article in Journal/Newspaper Antarc* Antarctica Sea ice Unknown Austral Syowa Station |
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geo Tsuneo Odate Mitsuo Fukuchi Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
topic_facet |
geo |
description |
Seawater samples beneath fast ice were collected from several depths using a Niskin bottle at four sites near Syowa Station, Antarctica, on 30 December 1996, and 12 and 21 January 1997. Vertical distributions of chlorophyll a (Chl a) and nitrate (NO3) concentrations were determined. Substantial temporal changes in Chl a and NO3 concentrations occurred in the surface stratified layer (<20m). There was a significant negative correlation between both the concentrations (n=40, P<0.01). This relationship suggests that an increase of 1μg l-1 of Chl a consumes 0.89μM of NO3 under fast ice. However, light limitation is severe for phytoplankton growing under thick sea ice (2.0-3.6m), as observed in the present study. It is unlikely that the observed increases of Chl a result from phytoplankton growth under heavy fast ice. Seawater, in which Chl a has increased and NO3 has been consumed under favorable light conditions, may be advected into the study area. This advection may be responsible for the apparent increase of Chl a and decrease of NO3 concentrations under the heavy fast ice. |
format |
Article in Journal/Newspaper |
author |
Tsuneo Odate Mitsuo Fukuchi |
author_facet |
Tsuneo Odate Mitsuo Fukuchi |
author_sort |
Tsuneo Odate |
title |
Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
title_short |
Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
title_full |
Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
title_fullStr |
Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
title_full_unstemmed |
Temporal changes in chlorophyll a and nitrate concentrations under fast ice near Syowa Station, Antarctica, in austral summer |
title_sort |
temporal changes in chlorophyll a and nitrate concentrations under fast ice near syowa station, antarctica, in austral summer |
publisher |
National Institute of Polar Research |
publishDate |
2004 |
url |
https://doi.org/10.15094/00009293 https://doaj.org/article/2b658f0b6aac4fa49a71330c227b8c61 |
geographic |
Austral Syowa Station |
geographic_facet |
Austral Syowa Station |
genre |
Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_source |
Antarctic Record, Vol 48, Iss 3, Pp 157-164 (2004) |
op_relation |
doi:10.15094/00009293 0085-7289 2432-079X https://doaj.org/article/2b658f0b6aac4fa49a71330c227b8c61 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00009293 |
_version_ |
1766267145452257280 |