Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton
A cyclonic cold-core eddy in the Northeast Atlantic of about 100 km in diameter at the sea surface was investigated in May 1985, approximately 3 wk after it had separated from the Polar Front. A strong thermocline, which was shallower but more pronounced than in the ambient water, separated a warm s...
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ftoceanrep:oai:oceanrep.geomar.de:6864 2023-05-15T17:33:16+02:00 Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton Lochte, Karin Pfannkuche, Olaf 1987 text https://oceanrep.geomar.de/id/eprint/6864/ https://oceanrep.geomar.de/id/eprint/6864/1/m039p153.pdf en eng Inter Research https://oceanrep.geomar.de/id/eprint/6864/1/m039p153.pdf Lochte, K. and Pfannkuche, O. (1987) Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton. Open Access Marine Ecology Progress Series, 39 . pp. 153-167. info:eu-repo/semantics/openAccess Article PeerReviewed 1987 ftoceanrep 2023-04-07T14:53:46Z A cyclonic cold-core eddy in the Northeast Atlantic of about 100 km in diameter at the sea surface was investigated in May 1985, approximately 3 wk after it had separated from the Polar Front. A strong thermocline, which was shallower but more pronounced than in the ambient water, separated a warm surface layer within the eddy from deeper cold water, while horizontal salinity gradients marked the boundary to the ambient water. The cold-core eddy could be distinguished from amblent Northeast Atlantic water in terms of its nutrient chemistry, phytoplankton species distribution and abundance, bacterial numbers and cell size. The surface layer of the eddy was distinct from deeper eddy water, and was characterized by high concentrations of chlorophyll a, total phytoplankton biomass, dinoflagellates and bacteria. At the eddy's margin diatoms were predominant. It is argued that the physical isolation of the eddy surface layer due to the formation of a shallow thermocline led to rapid utilisation of nutrients. This probably enabled the development of a dinoflagellate-dominated phytoplankton population and of organisms capable of heterotrophic regenerative processes. Article in Journal/Newspaper North Atlantic Northeast Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
A cyclonic cold-core eddy in the Northeast Atlantic of about 100 km in diameter at the sea surface was investigated in May 1985, approximately 3 wk after it had separated from the Polar Front. A strong thermocline, which was shallower but more pronounced than in the ambient water, separated a warm surface layer within the eddy from deeper cold water, while horizontal salinity gradients marked the boundary to the ambient water. The cold-core eddy could be distinguished from amblent Northeast Atlantic water in terms of its nutrient chemistry, phytoplankton species distribution and abundance, bacterial numbers and cell size. The surface layer of the eddy was distinct from deeper eddy water, and was characterized by high concentrations of chlorophyll a, total phytoplankton biomass, dinoflagellates and bacteria. At the eddy's margin diatoms were predominant. It is argued that the physical isolation of the eddy surface layer due to the formation of a shallow thermocline led to rapid utilisation of nutrients. This probably enabled the development of a dinoflagellate-dominated phytoplankton population and of organisms capable of heterotrophic regenerative processes. |
format |
Article in Journal/Newspaper |
author |
Lochte, Karin Pfannkuche, Olaf |
spellingShingle |
Lochte, Karin Pfannkuche, Olaf Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
author_facet |
Lochte, Karin Pfannkuche, Olaf |
author_sort |
Lochte, Karin |
title |
Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
title_short |
Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
title_full |
Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
title_fullStr |
Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
title_full_unstemmed |
Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton |
title_sort |
cyclonic cold-core eddy in the eastern north atlantic. ii. nutients, phytoplankton and bacteriaplankton |
publisher |
Inter Research |
publishDate |
1987 |
url |
https://oceanrep.geomar.de/id/eprint/6864/ https://oceanrep.geomar.de/id/eprint/6864/1/m039p153.pdf |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/6864/1/m039p153.pdf Lochte, K. and Pfannkuche, O. (1987) Cyclonic cold-core eddy in the eastern North Atlantic. II. Nutients, phytoplankton and bacteriaplankton. Open Access Marine Ecology Progress Series, 39 . pp. 153-167. |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766131712651165696 |