Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone
9 páginas This study - carried out between the Elephant and the Orkney islands - showed that spatial variability in the marginal ice-edge zone (MIZ) was greater than that found in open sea. Salinity and silicate contents point to the existence of two fronts: the first - near Elephant Island - separa...
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1994
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ftcsic:oai:digital.csic.es:10261/60252 2024-02-11T09:56:54+01:00 Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone Pérez, Fiz F. Tokarczyk, R. Figueiras, F. G. Ríos, Aida F. 1994 http://hdl.handle.net/10261/60252 en eng Gauthier-Villars Oceanologica Acta 17(2): 191-199 (1994) 0399-1784 http://hdl.handle.net/10261/60252 open artículo http://purl.org/coar/resource_type/c_6501 1994 ftcsic 2024-01-16T09:42:28Z 9 páginas This study - carried out between the Elephant and the Orkney islands - showed that spatial variability in the marginal ice-edge zone (MIZ) was greater than that found in open sea. Salinity and silicate contents point to the existence of two fronts: the first - near Elephant Island - separates the Surface Antarctic Water coming from Drake Passage from the winter water originating in the Weddell Sea. This water is characterized by its high concentrations of nitrate (> 30 mu M) and silicates (> 80 mu M). The second front - near the South Orkney Islands - undergoes the influence by a less saline water lens (< 34 %), poor in nutrients (N-NO3 < 24 mu M) and rich in chlorophyll (> 3.5 mg Chl a l super(-1)). Water masses circulation reveals the existence of a series of convergences and divergences which alternate along MIZ, together with different haline fronts. These fronts limit three different zones, taking into account the presence of chlorophyll. In zones where the surface layer presents both low salinity and stability with a thickness of about 40 m, chlorophyll contents are rather high - between 1.5 and 5 mg Chl a. m super(-3). On the other hand in the mixing vertical zone, these chlorophyll contents are low (<0.3 mg Chl a. m super(-3)) while the frontal region separating these two zones presents intermediate values and the existence of deep subsurface maximum of chlorophyll. Horizontal variability of integrated values (on the whole of the euphotic zone) is clearly inferior to the one present in surface concentrations. Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Drake Passage Elephant Island South Orkney Islands Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic Drake Passage Elephant Island ENVELOPE(-55.184,-55.184,-61.085,-61.085) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Weddell Weddell Sea |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
9 páginas This study - carried out between the Elephant and the Orkney islands - showed that spatial variability in the marginal ice-edge zone (MIZ) was greater than that found in open sea. Salinity and silicate contents point to the existence of two fronts: the first - near Elephant Island - separates the Surface Antarctic Water coming from Drake Passage from the winter water originating in the Weddell Sea. This water is characterized by its high concentrations of nitrate (> 30 mu M) and silicates (> 80 mu M). The second front - near the South Orkney Islands - undergoes the influence by a less saline water lens (< 34 %), poor in nutrients (N-NO3 < 24 mu M) and rich in chlorophyll (> 3.5 mg Chl a l super(-1)). Water masses circulation reveals the existence of a series of convergences and divergences which alternate along MIZ, together with different haline fronts. These fronts limit three different zones, taking into account the presence of chlorophyll. In zones where the surface layer presents both low salinity and stability with a thickness of about 40 m, chlorophyll contents are rather high - between 1.5 and 5 mg Chl a. m super(-3). On the other hand in the mixing vertical zone, these chlorophyll contents are low (<0.3 mg Chl a. m super(-3)) while the frontal region separating these two zones presents intermediate values and the existence of deep subsurface maximum of chlorophyll. Horizontal variability of integrated values (on the whole of the euphotic zone) is clearly inferior to the one present in surface concentrations. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Pérez, Fiz F. Tokarczyk, R. Figueiras, F. G. Ríos, Aida F. |
spellingShingle |
Pérez, Fiz F. Tokarczyk, R. Figueiras, F. G. Ríos, Aida F. Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
author_facet |
Pérez, Fiz F. Tokarczyk, R. Figueiras, F. G. Ríos, Aida F. |
author_sort |
Pérez, Fiz F. |
title |
Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
title_short |
Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
title_full |
Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
title_fullStr |
Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
title_full_unstemmed |
Water masses and phytoplankton biomass distribution during summer in the Weddell Sea marginal ice zone |
title_sort |
water masses and phytoplankton biomass distribution during summer in the weddell sea marginal ice zone |
publisher |
Gauthier-Villars |
publishDate |
1994 |
url |
http://hdl.handle.net/10261/60252 |
long_lat |
ENVELOPE(-55.184,-55.184,-61.085,-61.085) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Drake Passage Elephant Island South Orkney Islands Weddell Weddell Sea |
geographic_facet |
Antarctic Drake Passage Elephant Island South Orkney Islands Weddell Weddell Sea |
genre |
Antarc* Antarctic Drake Passage Elephant Island South Orkney Islands Weddell Sea |
genre_facet |
Antarc* Antarctic Drake Passage Elephant Island South Orkney Islands Weddell Sea |
op_relation |
Oceanologica Acta 17(2): 191-199 (1994) 0399-1784 http://hdl.handle.net/10261/60252 |
op_rights |
open |
_version_ |
1790606887798964224 |