Stratified lake and oceanic brines: Salt movement and time limits of existence1
Pronounced salt concentration gradients in five antarctic, arctic, and Pacific coastal lakes an be accounted for by diffusional transport of salt out of the deeper saline water layers. The computed values of the mean salt diffusion coefficients, based on the ages of salinity stratification, agree to...
Published in: | Limnology and Oceanography |
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Language: | English |
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crwiley:10.4319/lo.1975.20.5.0715 2024-06-23T07:47:46+00:00 Stratified lake and oceanic brines: Salt movement and time limits of existence1 Toth, David J. Lerman, Abraham 1975 http://dx.doi.org/10.4319/lo.1975.20.5.0715 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1975.20.5.0715 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1975.20.5.0715 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 20, issue 5, page 715-728 ISSN 0024-3590 1939-5590 journal-article 1975 crwiley https://doi.org/10.4319/lo.1975.20.5.0715 2024-06-04T06:48:07Z Pronounced salt concentration gradients in five antarctic, arctic, and Pacific coastal lakes an be accounted for by diffusional transport of salt out of the deeper saline water layers. The computed values of the mean salt diffusion coefficients, based on the ages of salinity stratification, agree to within an order of magnitude with molecular diffusivities for four out of five lakes. This agreement suggests that no major mixing events occurred in the water column during the late historical stages of the lakes. Upper limit time estimates for the removal of most of the salt from the saline bottom layers range from 5,000 to 35,000 years, depending on lake depth. Historical records of deepening of the Great Bitter Lake owing to dissolution of a salt layer on the bottom suggest that dissolution was a diffusion controlled process. For the saline brines in the Red Sea Deeps, an assumption that they are transient structures leads to the following estimates of the time to mixing with Red Sea water: 10 3 –10 4 years, if mixing takes place by diffusional transport of salt between the heavier and lighter brines, and 10 4 –10 5 years, if salt diffuses from the brines upward. The geologically short range of times suggests that the possible recycling of evaporative brines through the deeper ocean could not affect the ocean water salinity for any significant time interval. Article in Journal/Newspaper Antarc* Antarctic Arctic Wiley Online Library Antarctic Arctic Pacific Limnology and Oceanography 20 5 715 728 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Pronounced salt concentration gradients in five antarctic, arctic, and Pacific coastal lakes an be accounted for by diffusional transport of salt out of the deeper saline water layers. The computed values of the mean salt diffusion coefficients, based on the ages of salinity stratification, agree to within an order of magnitude with molecular diffusivities for four out of five lakes. This agreement suggests that no major mixing events occurred in the water column during the late historical stages of the lakes. Upper limit time estimates for the removal of most of the salt from the saline bottom layers range from 5,000 to 35,000 years, depending on lake depth. Historical records of deepening of the Great Bitter Lake owing to dissolution of a salt layer on the bottom suggest that dissolution was a diffusion controlled process. For the saline brines in the Red Sea Deeps, an assumption that they are transient structures leads to the following estimates of the time to mixing with Red Sea water: 10 3 –10 4 years, if mixing takes place by diffusional transport of salt between the heavier and lighter brines, and 10 4 –10 5 years, if salt diffuses from the brines upward. The geologically short range of times suggests that the possible recycling of evaporative brines through the deeper ocean could not affect the ocean water salinity for any significant time interval. |
format |
Article in Journal/Newspaper |
author |
Toth, David J. Lerman, Abraham |
spellingShingle |
Toth, David J. Lerman, Abraham Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
author_facet |
Toth, David J. Lerman, Abraham |
author_sort |
Toth, David J. |
title |
Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
title_short |
Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
title_full |
Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
title_fullStr |
Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
title_full_unstemmed |
Stratified lake and oceanic brines: Salt movement and time limits of existence1 |
title_sort |
stratified lake and oceanic brines: salt movement and time limits of existence1 |
publisher |
Wiley |
publishDate |
1975 |
url |
http://dx.doi.org/10.4319/lo.1975.20.5.0715 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1975.20.5.0715 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1975.20.5.0715 |
geographic |
Antarctic Arctic Pacific |
geographic_facet |
Antarctic Arctic Pacific |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
Limnology and Oceanography volume 20, issue 5, page 715-728 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1975.20.5.0715 |
container_title |
Limnology and Oceanography |
container_volume |
20 |
container_issue |
5 |
container_start_page |
715 |
op_container_end_page |
728 |
_version_ |
1802637907237797888 |