Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989
The surface layer properties of the Weddell Gyre were measured during a cruise of the RV 'Polarstern' in September and October 1989 on a transect between the tip of the Antarctic Peninsula (northwestern Weddell Sea) and Cape Norvegia (southeastern Weddell Sea). Sea ice cover, hydrography,...
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ftawi:oai:epic.awi.de:2273 2023-09-05T13:12:10+02:00 Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 Nöthig, Eva-Maria Bathmann, Ulrich Jennings, J. C. Jr. Fahrbach, Eberhard Gradinger, R. Gordon, L. I. Makarov, R. 1991 https://epic.awi.de/id/eprint/2273/ https://hdl.handle.net/10013/epic.12861 unknown Nöthig, E. M. orcid:0000-0002-7527-7827 , Bathmann, U. , Jennings, J. C. J. , Fahrbach, E. , Gradinger, R. , Gordon, L. I. and Makarov, R. (1991) Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 , Marine Chemistry, 35 , pp. 325-336 . hdl:10013/epic.12861 EPIC3Marine Chemistry, 35, pp. 325-336 Article isiRev 1991 ftawi 2023-08-22T19:43:12Z The surface layer properties of the Weddell Gyre were measured during a cruise of the RV 'Polarstern' in September and October 1989 on a transect between the tip of the Antarctic Peninsula (northwestern Weddell Sea) and Cape Norvegia (southeastern Weddell Sea). Sea ice cover, hydrography, and the distribution of inorganic nutrients and dissolved oxygen repre-sented late winter conditions: a quasi homogeneous Winter Water layer with near-freezing temperatures, high salinities and high levels of nitrate, and undersaturated with dis-solved oxygen.The area investi-gated could be divided into three regions based on the physical, chemical and biological patterns: the western and eastern flanks and the gyre interior. In all areas autotrophic biomass in sea ice was high in comparison to the un-derlying water column. With-in the sea ice mainly diatoms and dinoflagellates were pre-sent, but the dominant au-to-trophic organisms in the water column were nanoflagellates. Ammonia values were relatively high in the Winter Water layer in the central region indicating heterotrophic activity. Meso-zoo-plank-ton was dominated by copepods which can in turn be divided into two groups: overwintering, inactive Calanus acutus were found in the Warm Deep Water, whereas actively feeding Calanus propinquus were most abundant in the upper 120 m of the water column under the sea ice in the central region. These spatial differences may influence development of the respective sum-mer pelagic communities. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea Copepods Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula Austral The Antarctic Weddell Weddell Sea |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The surface layer properties of the Weddell Gyre were measured during a cruise of the RV 'Polarstern' in September and October 1989 on a transect between the tip of the Antarctic Peninsula (northwestern Weddell Sea) and Cape Norvegia (southeastern Weddell Sea). Sea ice cover, hydrography, and the distribution of inorganic nutrients and dissolved oxygen repre-sented late winter conditions: a quasi homogeneous Winter Water layer with near-freezing temperatures, high salinities and high levels of nitrate, and undersaturated with dis-solved oxygen.The area investi-gated could be divided into three regions based on the physical, chemical and biological patterns: the western and eastern flanks and the gyre interior. In all areas autotrophic biomass in sea ice was high in comparison to the un-derlying water column. With-in the sea ice mainly diatoms and dinoflagellates were pre-sent, but the dominant au-to-trophic organisms in the water column were nanoflagellates. Ammonia values were relatively high in the Winter Water layer in the central region indicating heterotrophic activity. Meso-zoo-plank-ton was dominated by copepods which can in turn be divided into two groups: overwintering, inactive Calanus acutus were found in the Warm Deep Water, whereas actively feeding Calanus propinquus were most abundant in the upper 120 m of the water column under the sea ice in the central region. These spatial differences may influence development of the respective sum-mer pelagic communities. |
format |
Article in Journal/Newspaper |
author |
Nöthig, Eva-Maria Bathmann, Ulrich Jennings, J. C. Jr. Fahrbach, Eberhard Gradinger, R. Gordon, L. I. Makarov, R. |
spellingShingle |
Nöthig, Eva-Maria Bathmann, Ulrich Jennings, J. C. Jr. Fahrbach, Eberhard Gradinger, R. Gordon, L. I. Makarov, R. Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
author_facet |
Nöthig, Eva-Maria Bathmann, Ulrich Jennings, J. C. Jr. Fahrbach, Eberhard Gradinger, R. Gordon, L. I. Makarov, R. |
author_sort |
Nöthig, Eva-Maria |
title |
Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
title_short |
Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
title_full |
Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
title_fullStr |
Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
title_full_unstemmed |
Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 |
title_sort |
regional relationships between biological and hydrographical properties in the weddell gyre in late austral winter 1989 |
publishDate |
1991 |
url |
https://epic.awi.de/id/eprint/2273/ https://hdl.handle.net/10013/epic.12861 |
geographic |
Antarctic Antarctic Peninsula Austral The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Austral The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea Copepods |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Sea ice Weddell Sea Copepods |
op_source |
EPIC3Marine Chemistry, 35, pp. 325-336 |
op_relation |
Nöthig, E. M. orcid:0000-0002-7527-7827 , Bathmann, U. , Jennings, J. C. J. , Fahrbach, E. , Gradinger, R. , Gordon, L. I. and Makarov, R. (1991) Regional relationships between biological and hydrographical properties in the Weddell Gyre in late austral winter 1989 , Marine Chemistry, 35 , pp. 325-336 . hdl:10013/epic.12861 |
_version_ |
1776199191850123264 |