Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters

During January and February 2000 four research vessels, from Russia, the UK, Japan, and the United States, conducted an oceanographic survey with 137 hydrographic stations within the Scotia Sea and adjoining waters as part of a survey sponsored by the Commission for the Conservation of Antarctic Mar...

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Published in:Deep Sea Research Part II: Topical Studies in Oceanography
Main Authors: Holm-Hansen, O., Naganobu, M., Kawaguchi, S., Kameda, T., Krasovski, I., Tchernyshkov, P., Priddle, J., Korb, R., Brandon, M., Demer, D., Hewitt, R.P., Kahru, M., Hewes, C.D.
Format: Article in Journal/Newspaper
Language:unknown
Published: Elsevier 2004
Subjects:
Online Access:http://nora.nerc.ac.uk/id/eprint/12201/
http://www.sciencedirect.com/science/article/pii/S0967064504000839
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spelling ftnerc:oai:nora.nerc.ac.uk:12201 2023-05-15T13:45:10+02:00 Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters Holm-Hansen, O. Naganobu, M. Kawaguchi, S. Kameda, T. Krasovski, I. Tchernyshkov, P. Priddle, J. Korb, R. Brandon, M. Demer, D. Hewitt, R.P. Kahru, M. Hewes, C.D. 2004 http://nora.nerc.ac.uk/id/eprint/12201/ http://www.sciencedirect.com/science/article/pii/S0967064504000839 unknown Elsevier Holm-Hansen, O.; Naganobu, M.; Kawaguchi, S.; Kameda, T.; Krasovski, I.; Tchernyshkov, P.; Priddle, J.; Korb, R.; Brandon, M.; Demer, D.; Hewitt, R.P.; Kahru, M.; Hewes, C.D. 2004 Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters. Deep-Sea Research Part II, 51 (12-13). 1333-1350. https://doi.org/10.1016/j.dsr2.2004.06.015 <https://doi.org/10.1016/j.dsr2.2004.06.015> Marine Sciences Botany Ecology and Environment Chemistry Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.1016/j.dsr2.2004.06.015 2023-02-04T19:27:51Z During January and February 2000 four research vessels, from Russia, the UK, Japan, and the United States, conducted an oceanographic survey with 137 hydrographic stations within the Scotia Sea and adjoining waters as part of a survey sponsored by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) to estimate the biomass and distribution of Antarctic krill in the Scotia Sea. Chlorophyll-a (Chl-a) measurements showed great variability in phytoplankton biomass within the Scotia Sea, with some areas having among the lowest Chl-a concentrations found in Antarctic waters (<0.1 mg m(-3) in surface waters) while other areas were among the richest with > 10 mg m(-3). This paper describes the distribution and concentration of Chl-a in the upper 100 m of the water column and relates the Chl-a profiles at individual stations to profiles of upper water-column stability, to the depth of the upper mixed layer, and to the mixing of different water masses. The 58 stations with the lowest Chl-a values in surface waters also had low values for integrated Chl-a (33.9 +/- 19.5 mg m(-2)) and a Chl-a maximum at depths of between 70 and 90 m, in contrast to all other stations where deep Chl-a maxima did not occur. The T/S diagrams at many of these stations were indicative of Antarctic Circumpolar Current (ACC) waters. The central Scotia Sea and areas to the west and north of South Georgia had significantly higher integrated Chl-a values (98.1+/-46.0 mg m(-2), n = 57), in addition to five stations with very high Chl-a values (mean of 359+/-270 mg m(-2)). The mean rate of integrated primary production, which was estimated using the Chl-a data and the mean incident solar radiation measured from previous cruises as well as from satellite data, was estimated to be 994 mg carbon m(-2) day(-1). The temperature profiles at these stations suggested that considerable interleaving and mixing of water types had occurred, which was also evident in the T/S diagrams, which indicated mixing of ACC waters with ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Scotia Sea Natural Environment Research Council: NERC Open Research Archive Antarctic Scotia Sea Deep Sea Research Part II: Topical Studies in Oceanography 51 12-13 1333 1350
institution Open Polar
collection Natural Environment Research Council: NERC Open Research Archive
op_collection_id ftnerc
language unknown
topic Marine Sciences
Botany
Ecology and Environment
Chemistry
spellingShingle Marine Sciences
Botany
Ecology and Environment
Chemistry
Holm-Hansen, O.
Naganobu, M.
Kawaguchi, S.
Kameda, T.
Krasovski, I.
Tchernyshkov, P.
Priddle, J.
Korb, R.
Brandon, M.
Demer, D.
Hewitt, R.P.
Kahru, M.
Hewes, C.D.
Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
topic_facet Marine Sciences
Botany
Ecology and Environment
Chemistry
description During January and February 2000 four research vessels, from Russia, the UK, Japan, and the United States, conducted an oceanographic survey with 137 hydrographic stations within the Scotia Sea and adjoining waters as part of a survey sponsored by the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) to estimate the biomass and distribution of Antarctic krill in the Scotia Sea. Chlorophyll-a (Chl-a) measurements showed great variability in phytoplankton biomass within the Scotia Sea, with some areas having among the lowest Chl-a concentrations found in Antarctic waters (<0.1 mg m(-3) in surface waters) while other areas were among the richest with > 10 mg m(-3). This paper describes the distribution and concentration of Chl-a in the upper 100 m of the water column and relates the Chl-a profiles at individual stations to profiles of upper water-column stability, to the depth of the upper mixed layer, and to the mixing of different water masses. The 58 stations with the lowest Chl-a values in surface waters also had low values for integrated Chl-a (33.9 +/- 19.5 mg m(-2)) and a Chl-a maximum at depths of between 70 and 90 m, in contrast to all other stations where deep Chl-a maxima did not occur. The T/S diagrams at many of these stations were indicative of Antarctic Circumpolar Current (ACC) waters. The central Scotia Sea and areas to the west and north of South Georgia had significantly higher integrated Chl-a values (98.1+/-46.0 mg m(-2), n = 57), in addition to five stations with very high Chl-a values (mean of 359+/-270 mg m(-2)). The mean rate of integrated primary production, which was estimated using the Chl-a data and the mean incident solar radiation measured from previous cruises as well as from satellite data, was estimated to be 994 mg carbon m(-2) day(-1). The temperature profiles at these stations suggested that considerable interleaving and mixing of water types had occurred, which was also evident in the T/S diagrams, which indicated mixing of ACC waters with ...
format Article in Journal/Newspaper
author Holm-Hansen, O.
Naganobu, M.
Kawaguchi, S.
Kameda, T.
Krasovski, I.
Tchernyshkov, P.
Priddle, J.
Korb, R.
Brandon, M.
Demer, D.
Hewitt, R.P.
Kahru, M.
Hewes, C.D.
author_facet Holm-Hansen, O.
Naganobu, M.
Kawaguchi, S.
Kameda, T.
Krasovski, I.
Tchernyshkov, P.
Priddle, J.
Korb, R.
Brandon, M.
Demer, D.
Hewitt, R.P.
Kahru, M.
Hewes, C.D.
author_sort Holm-Hansen, O.
title Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
title_short Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
title_full Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
title_fullStr Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
title_full_unstemmed Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters
title_sort factors influencing the distribution, biomass, and productivity of phytoplankton in the scotia sea and adjoining waters
publisher Elsevier
publishDate 2004
url http://nora.nerc.ac.uk/id/eprint/12201/
http://www.sciencedirect.com/science/article/pii/S0967064504000839
geographic Antarctic
Scotia Sea
geographic_facet Antarctic
Scotia Sea
genre Antarc*
Antarctic
Antarctic Krill
Scotia Sea
genre_facet Antarc*
Antarctic
Antarctic Krill
Scotia Sea
op_relation Holm-Hansen, O.; Naganobu, M.; Kawaguchi, S.; Kameda, T.; Krasovski, I.; Tchernyshkov, P.; Priddle, J.; Korb, R.; Brandon, M.; Demer, D.; Hewitt, R.P.; Kahru, M.; Hewes, C.D. 2004 Factors influencing the distribution, biomass, and productivity of phytoplankton in the Scotia Sea and adjoining waters. Deep-Sea Research Part II, 51 (12-13). 1333-1350. https://doi.org/10.1016/j.dsr2.2004.06.015 <https://doi.org/10.1016/j.dsr2.2004.06.015>
op_doi https://doi.org/10.1016/j.dsr2.2004.06.015
container_title Deep Sea Research Part II: Topical Studies in Oceanography
container_volume 51
container_issue 12-13
container_start_page 1333
op_container_end_page 1350
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