On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands
During the international "Overflow-Expedition'' 1973 on R.V. "Meteor" oxygen concentrations in surface layers were measured in order to determine the oxygen gradients within the first two meters and to add some informations to the mechanisms of oxygen exchange at the air-sea...
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1978
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.611462 https://doi.org/10.1594/PANGAEA.611462 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.611462 2023-05-15T16:11:05+02:00 On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands Grasshoff, Klaus Johannssen, Jens MEDIAN LATITUDE: 63.115833 * MEDIAN LONGITUDE: -7.565278 * SOUTH-BOUND LATITUDE: 61.176667 * WEST-BOUND LONGITUDE: -14.306667 * NORTH-BOUND LATITUDE: 64.593333 * EAST-BOUND LONGITUDE: 8.625000 * DATE/TIME START: 1973-09-05T21:30:00 * DATE/TIME END: 1973-09-20T22:00:00 1978-05-14 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.611462 https://doi.org/10.1594/PANGAEA.611462 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.611462 https://doi.org/10.1594/PANGAEA.611462 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Grasshoff, Klaus; Johansen, J (1978): Untersuchung über die Feinstruktur der Sauerstoffverteilung in oberflächennahen Schichten im Seegebiet zwischen Island und Färöer. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe A Allgemeines, Physik und Chemie des Meeres, Gebrüder Bornträger, Berlin, Stuttgart, A20, 109-120 Iceland-Faroe Ridge M31 M31_264 M31_266 M31_270 M31_283 M31_301 M31_419 Meteor (1964) Overflow 73 Water sample WS Dataset 1978 ftpangaea https://doi.org/10.1594/PANGAEA.611462 2023-01-20T07:31:03Z During the international "Overflow-Expedition'' 1973 on R.V. "Meteor" oxygen concentrations in surface layers were measured in order to determine the oxygen gradients within the first two meters and to add some informations to the mechanisms of oxygen exchange at the air-sea interface. These investigations may be interesting also with regard to longterm- observations of the oxygen distribution in the Atlantic, especially the problem of the A.O.U. (apparent oxygen utilization) determination. To measure oxygen gradients a special sampler was built which is able to take water samples each 20 cm of the first 2 meters. These data were supplemented by further samples down to 150 m, taken by conventional water samplers, from which samples were also taken to measure N2/O2-relations. By comparing these relations with theoretical relations in air-saturated water the influence of biological production and consumption on the oxygen contents in water could be estimated. A simple glass apparatus was built to extract gas from the water samples, and hereafter the N2/O2-relations were determined by mass spectrometry. Most distributions of the oxygen anomaly show a negative oxygen balance which varies largely, probably due to strong mixing processes in the Iceland-Faroe ridge area. The distribution of surface oxygen saturation values are of two different types. The values of the stations 260, 262 and 270 stem from mixed water and show homogeneous supersaturations, as can be found instantly when whitecaps appear. The values of 9 other stations are from water, sampled during calm periods which has been mixed and supersaturated before. They show a decreasing oxygen saturation towards the sea surface and often undersaturation in the upper decimeters up to 98 % and even 91 %. So at the air-sea interface even less initial oxygen saturation than 100 % can be found after supersaturation during heavy weather periods. Dataset Faroe Islands Iceland PANGAEA - Data Publisher for Earth & Environmental Science Faroe Islands ENVELOPE(-14.306667,8.625000,64.593333,61.176667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Iceland-Faroe Ridge M31 M31_264 M31_266 M31_270 M31_283 M31_301 M31_419 Meteor (1964) Overflow 73 Water sample WS |
spellingShingle |
Iceland-Faroe Ridge M31 M31_264 M31_266 M31_270 M31_283 M31_301 M31_419 Meteor (1964) Overflow 73 Water sample WS Grasshoff, Klaus Johannssen, Jens On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
topic_facet |
Iceland-Faroe Ridge M31 M31_264 M31_266 M31_270 M31_283 M31_301 M31_419 Meteor (1964) Overflow 73 Water sample WS |
description |
During the international "Overflow-Expedition'' 1973 on R.V. "Meteor" oxygen concentrations in surface layers were measured in order to determine the oxygen gradients within the first two meters and to add some informations to the mechanisms of oxygen exchange at the air-sea interface. These investigations may be interesting also with regard to longterm- observations of the oxygen distribution in the Atlantic, especially the problem of the A.O.U. (apparent oxygen utilization) determination. To measure oxygen gradients a special sampler was built which is able to take water samples each 20 cm of the first 2 meters. These data were supplemented by further samples down to 150 m, taken by conventional water samplers, from which samples were also taken to measure N2/O2-relations. By comparing these relations with theoretical relations in air-saturated water the influence of biological production and consumption on the oxygen contents in water could be estimated. A simple glass apparatus was built to extract gas from the water samples, and hereafter the N2/O2-relations were determined by mass spectrometry. Most distributions of the oxygen anomaly show a negative oxygen balance which varies largely, probably due to strong mixing processes in the Iceland-Faroe ridge area. The distribution of surface oxygen saturation values are of two different types. The values of the stations 260, 262 and 270 stem from mixed water and show homogeneous supersaturations, as can be found instantly when whitecaps appear. The values of 9 other stations are from water, sampled during calm periods which has been mixed and supersaturated before. They show a decreasing oxygen saturation towards the sea surface and often undersaturation in the upper decimeters up to 98 % and even 91 %. So at the air-sea interface even less initial oxygen saturation than 100 % can be found after supersaturation during heavy weather periods. |
format |
Dataset |
author |
Grasshoff, Klaus Johannssen, Jens |
author_facet |
Grasshoff, Klaus Johannssen, Jens |
author_sort |
Grasshoff, Klaus |
title |
On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
title_short |
On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
title_full |
On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
title_fullStr |
On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
title_full_unstemmed |
On the fine structure of oxygen distribution in surface water layers in the area between Iceland and Faroe Islands |
title_sort |
on the fine structure of oxygen distribution in surface water layers in the area between iceland and faroe islands |
publisher |
PANGAEA |
publishDate |
1978 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.611462 https://doi.org/10.1594/PANGAEA.611462 |
op_coverage |
MEDIAN LATITUDE: 63.115833 * MEDIAN LONGITUDE: -7.565278 * SOUTH-BOUND LATITUDE: 61.176667 * WEST-BOUND LONGITUDE: -14.306667 * NORTH-BOUND LATITUDE: 64.593333 * EAST-BOUND LONGITUDE: 8.625000 * DATE/TIME START: 1973-09-05T21:30:00 * DATE/TIME END: 1973-09-20T22:00:00 |
long_lat |
ENVELOPE(-14.306667,8.625000,64.593333,61.176667) |
geographic |
Faroe Islands |
geographic_facet |
Faroe Islands |
genre |
Faroe Islands Iceland |
genre_facet |
Faroe Islands Iceland |
op_source |
Supplement to: Grasshoff, Klaus; Johansen, J (1978): Untersuchung über die Feinstruktur der Sauerstoffverteilung in oberflächennahen Schichten im Seegebiet zwischen Island und Färöer. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe A Allgemeines, Physik und Chemie des Meeres, Gebrüder Bornträger, Berlin, Stuttgart, A20, 109-120 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.611462 https://doi.org/10.1594/PANGAEA.611462 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.611462 |
_version_ |
1765996195578118144 |