Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976
Formation of homogeneous water was observed in the surface layer above a depth of 400m in the Ongul Strait in early September of 1976 when fast ice had the maximum thickness. This water was produced from stratified water as a result of haline convection induced by the exclusion of brine during the g...
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National Institute of Polar Research
1982
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fttriple:oai:gotriple.eu:oai:doaj.org/article:4aceab9db32d4205ab4ccd31303f78e7 2023-05-15T13:44:59+02:00 Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 Masaaki Wakatsuchi 1982-02-01 https://doi.org/10.15094/00008286 https://doaj.org/article/4aceab9db32d4205ab4ccd31303f78e7 en other eng National Institute of Polar Research doi:10.15094/00008286 0085-7289 2432-079X https://doaj.org/article/4aceab9db32d4205ab4ccd31303f78e7 undefined Antarctic Record, Iss 74, Pp 85-108 (1982) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1982 fttriple https://doi.org/10.15094/00008286 2023-01-22T18:06:50Z Formation of homogeneous water was observed in the surface layer above a depth of 400m in the Ongul Strait in early September of 1976 when fast ice had the maximum thickness. This water was produced from stratified water as a result of haline convection induced by the exclusion of brine during the growth of fast ice from 1m in thickness in May to about 2m in early September. The salinity of surface water in this strait also increased from 33.93‰ to 34.10‰ by the convection process during the ice growth. Meanwhile in the Hovdebukta, water with the maximum salinity of 35.03‰ was observed at 300m. The formation of the saline water is probably due to the exclusion of brine by the rapid freezing of sea water in cracks as well as by the gradual growth of fast ice. With the beginning of the spring a marked decrease was seen in salinity of bottom water in the Ongul Strait and of intermediate and bottom waters in the Hovdebukta despite a rather increasing salinity of surface water in both areas. It can be explained only by the advection of less saline water into the deeper layers in both areas. The saline water produced by the exclusion of brine was expected to remain near the bottom of glacial troughs until summer, but it was not observed there in summer. An interpretation is given that the saline water disappeared as a result of the advection of less saline water off the Soya Coast and/or the inflow of fresh water produced in the coast of the continent, probably from the bottom of glaciers from spring onward. Article in Journal/Newspaper Antarc* Antarctica Unknown Hovdebukta ENVELOPE(39.750,39.750,-69.175,-69.175) Ongul ENVELOPE(39.533,39.533,-69.017,-69.017) Syowa Station |
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Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo |
spellingShingle |
geo Masaaki Wakatsuchi Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
topic_facet |
geo |
description |
Formation of homogeneous water was observed in the surface layer above a depth of 400m in the Ongul Strait in early September of 1976 when fast ice had the maximum thickness. This water was produced from stratified water as a result of haline convection induced by the exclusion of brine during the growth of fast ice from 1m in thickness in May to about 2m in early September. The salinity of surface water in this strait also increased from 33.93‰ to 34.10‰ by the convection process during the ice growth. Meanwhile in the Hovdebukta, water with the maximum salinity of 35.03‰ was observed at 300m. The formation of the saline water is probably due to the exclusion of brine by the rapid freezing of sea water in cracks as well as by the gradual growth of fast ice. With the beginning of the spring a marked decrease was seen in salinity of bottom water in the Ongul Strait and of intermediate and bottom waters in the Hovdebukta despite a rather increasing salinity of surface water in both areas. It can be explained only by the advection of less saline water into the deeper layers in both areas. The saline water produced by the exclusion of brine was expected to remain near the bottom of glacial troughs until summer, but it was not observed there in summer. An interpretation is given that the saline water disappeared as a result of the advection of less saline water off the Soya Coast and/or the inflow of fresh water produced in the coast of the continent, probably from the bottom of glaciers from spring onward. |
format |
Article in Journal/Newspaper |
author |
Masaaki Wakatsuchi |
author_facet |
Masaaki Wakatsuchi |
author_sort |
Masaaki Wakatsuchi |
title |
Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
title_short |
Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
title_full |
Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
title_fullStr |
Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
title_full_unstemmed |
Seasonal variations in water structure under fast ice near Syowa Station, Antarctica, in 1976 |
title_sort |
seasonal variations in water structure under fast ice near syowa station, antarctica, in 1976 |
publisher |
National Institute of Polar Research |
publishDate |
1982 |
url |
https://doi.org/10.15094/00008286 https://doaj.org/article/4aceab9db32d4205ab4ccd31303f78e7 |
long_lat |
ENVELOPE(39.750,39.750,-69.175,-69.175) ENVELOPE(39.533,39.533,-69.017,-69.017) |
geographic |
Hovdebukta Ongul Syowa Station |
geographic_facet |
Hovdebukta Ongul Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Antarctic Record, Iss 74, Pp 85-108 (1982) |
op_relation |
doi:10.15094/00008286 0085-7289 2432-079X https://doaj.org/article/4aceab9db32d4205ab4ccd31303f78e7 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00008286 |
_version_ |
1766209880704679936 |