Influence of estuarine tidal mixing on structure and spatial scales of large river plumes
The Yenisei and Khatanga rivers are among the largest estuarine rivers that inflow to the Arctic Ocean. Discharge of the Yenisei River is 1 order of magnitude larger than that of the Khatanga River. However, spatial scales of buoyant plumes formed by freshwater runoff from the Yenisei and Khatanga g...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:afc2bce90315430b84bc5ce4455b1edb 2023-05-15T15:09:49+02:00 Influence of estuarine tidal mixing on structure and spatial scales of large river plumes A. Osadchiev I. Medvedev S. Shchuka M. Kulikov E. Spivak M. Pisareva I. Semiletov 2020-07-01 https://doi.org/10.5194/os-16-781-2020 https://os.copernicus.org/articles/16/781/2020/os-16-781-2020.pdf https://doaj.org/article/afc2bce90315430b84bc5ce4455b1edb en eng Copernicus Publications doi:10.5194/os-16-781-2020 1812-0784 1812-0792 https://os.copernicus.org/articles/16/781/2020/os-16-781-2020.pdf https://doaj.org/article/afc2bce90315430b84bc5ce4455b1edb undefined Ocean Science, Vol 16, Pp 781-798 (2020) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/os-16-781-2020 2023-01-22T17:51:31Z The Yenisei and Khatanga rivers are among the largest estuarine rivers that inflow to the Arctic Ocean. Discharge of the Yenisei River is 1 order of magnitude larger than that of the Khatanga River. However, spatial scales of buoyant plumes formed by freshwater runoff from the Yenisei and Khatanga gulfs are similar. This feature is caused by different tidal forcing in these estuaries, which have similar sizes, climate conditions, and geomorphology. The Khatanga discharge experiences strong tidal forcing that causes formation of a diluted bottom-advected plume in the Khatanga Gulf. This deep and weakly stratified plume has a small freshwater fraction and therefore occupies a large area on the shelf. The Yenisei Gulf, on the other hand, is a salt-wedge estuary that receives a large freshwater discharge and is less affected by tidal mixing due to low tidal velocities. As a result, the low-salinity and strongly stratified Yenisei plume has a large freshwater fraction and its horizontal size is relatively small. The results show that estuarine tidal mixing determines freshwater fraction in these river plumes, which governs their depth and area after they spread from estuaries to coastal sea. Therefore, the influence of estuarine mixing on spatial scales of a large river plume can be of the same importance as the roles of river discharge rate and wind forcing. In particular, plumes with similar areas can be formed by rivers with significantly different discharge rates, as illustrated by the Yenisei and Khatanga plumes. Article in Journal/Newspaper Arctic Arctic Ocean khatanga Unknown Arctic Arctic Ocean Yenisei River ENVELOPE(84.738,84.738,69.718,69.718) Ocean Science 16 4 781 798 |
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Open Polar |
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language |
English |
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geo envir |
spellingShingle |
geo envir A. Osadchiev I. Medvedev S. Shchuka M. Kulikov E. Spivak M. Pisareva I. Semiletov Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
topic_facet |
geo envir |
description |
The Yenisei and Khatanga rivers are among the largest estuarine rivers that inflow to the Arctic Ocean. Discharge of the Yenisei River is 1 order of magnitude larger than that of the Khatanga River. However, spatial scales of buoyant plumes formed by freshwater runoff from the Yenisei and Khatanga gulfs are similar. This feature is caused by different tidal forcing in these estuaries, which have similar sizes, climate conditions, and geomorphology. The Khatanga discharge experiences strong tidal forcing that causes formation of a diluted bottom-advected plume in the Khatanga Gulf. This deep and weakly stratified plume has a small freshwater fraction and therefore occupies a large area on the shelf. The Yenisei Gulf, on the other hand, is a salt-wedge estuary that receives a large freshwater discharge and is less affected by tidal mixing due to low tidal velocities. As a result, the low-salinity and strongly stratified Yenisei plume has a large freshwater fraction and its horizontal size is relatively small. The results show that estuarine tidal mixing determines freshwater fraction in these river plumes, which governs their depth and area after they spread from estuaries to coastal sea. Therefore, the influence of estuarine mixing on spatial scales of a large river plume can be of the same importance as the roles of river discharge rate and wind forcing. In particular, plumes with similar areas can be formed by rivers with significantly different discharge rates, as illustrated by the Yenisei and Khatanga plumes. |
format |
Article in Journal/Newspaper |
author |
A. Osadchiev I. Medvedev S. Shchuka M. Kulikov E. Spivak M. Pisareva I. Semiletov |
author_facet |
A. Osadchiev I. Medvedev S. Shchuka M. Kulikov E. Spivak M. Pisareva I. Semiletov |
author_sort |
A. Osadchiev |
title |
Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
title_short |
Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
title_full |
Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
title_fullStr |
Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
title_full_unstemmed |
Influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
title_sort |
influence of estuarine tidal mixing on structure and spatial scales of large river plumes |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/os-16-781-2020 https://os.copernicus.org/articles/16/781/2020/os-16-781-2020.pdf https://doaj.org/article/afc2bce90315430b84bc5ce4455b1edb |
long_lat |
ENVELOPE(84.738,84.738,69.718,69.718) |
geographic |
Arctic Arctic Ocean Yenisei River |
geographic_facet |
Arctic Arctic Ocean Yenisei River |
genre |
Arctic Arctic Ocean khatanga |
genre_facet |
Arctic Arctic Ocean khatanga |
op_source |
Ocean Science, Vol 16, Pp 781-798 (2020) |
op_relation |
doi:10.5194/os-16-781-2020 1812-0784 1812-0792 https://os.copernicus.org/articles/16/781/2020/os-16-781-2020.pdf https://doaj.org/article/afc2bce90315430b84bc5ce4455b1edb |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/os-16-781-2020 |
container_title |
Ocean Science |
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16 |
container_issue |
4 |
container_start_page |
781 |
op_container_end_page |
798 |
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