A cyclonic gyre in an ice-covered lake
Observations of a cyclonic gyre in an ice-covered, midsize (, 5 km2), temperate lake are presented. Horizontaland vertical measurements of temperature and electrical conductivity measurements were collected using aconductivitytemperaturedepth logger mounted on an autonomous underwater vehicle and ad...
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Amer Soc Limnology Oceanography
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Online Access: | https://doi.org/10.4319/lo.2013.58.1.0363 http://ecite.utas.edu.au/82237 |
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ftunivtasecite:oai:ecite.utas.edu.au:82237 2023-05-15T15:06:42+02:00 A cyclonic gyre in an ice-covered lake Forrest, AL Laval, BE Pieters, R Lim, DSS 2013 application/pdf https://doi.org/10.4319/lo.2013.58.1.0363 http://ecite.utas.edu.au/82237 en eng Amer Soc Limnology Oceanography http://ecite.utas.edu.au/82237/1/Forrest_etal(2013)_LO.pdf http://dx.doi.org/10.4319/lo.2013.58.1.0363 Forrest, AL and Laval, BE and Pieters, R and Lim, DSS, A cyclonic gyre in an ice-covered lake, Limnology and Oceanography, 58, (1) pp. 363-375. ISSN 0024-3590 (2013) [Refereed Article] http://ecite.utas.edu.au/82237 Engineering Maritime Engineering Ocean Engineering Refereed Article PeerReviewed 2013 ftunivtasecite https://doi.org/10.4319/lo.2013.58.1.0363 2019-12-13T21:47:09Z Observations of a cyclonic gyre in an ice-covered, midsize (, 5 km2), temperate lake are presented. Horizontaland vertical measurements of temperature and electrical conductivity measurements were collected using aconductivitytemperaturedepth logger mounted on an autonomous underwater vehicle and additionalinstrumentation. These measurements revealed a cylindrical density anomaly with a radius of , 110 m extendingfrom the surface to , 14 m depth. The observed radius is smaller than the internal Rossby radius of deformation(, 200 m), which suggests a cyclogeostrophic balance between centripetal, Coriolis, and pressure forces. Themaximum azimuthal velocity, calculated assuming this balance, was , 2.1 cm s21 at 68 m depth. The Rossbynumber associated with this velocity was 1.7; this is consistent with the cyclogeostrophic assumption (i.e., Rossbynumber . 1) and nearly twice that of similar under-ice eddies in the Arctic Ocean. The estimated Ekman spindowntimescale is 1.515 d, but despite this, the gyre appeared to be relatively unchanged over 6 d of fieldobservations. This persistence implies the gyre was forced over the course of the field study; however, the sourceof the forcing is unknown. Horizontal temperature transects at and below the bottom of the gyre revealedcoherent temperature fluctuations suggestive of vertical transport associated with the gyre. Article in Journal/Newspaper Arctic Arctic Ocean eCite UTAS (University of Tasmania) Arctic Arctic Ocean Limnology and Oceanography 58 1 363 375 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Engineering Maritime Engineering Ocean Engineering |
spellingShingle |
Engineering Maritime Engineering Ocean Engineering Forrest, AL Laval, BE Pieters, R Lim, DSS A cyclonic gyre in an ice-covered lake |
topic_facet |
Engineering Maritime Engineering Ocean Engineering |
description |
Observations of a cyclonic gyre in an ice-covered, midsize (, 5 km2), temperate lake are presented. Horizontaland vertical measurements of temperature and electrical conductivity measurements were collected using aconductivitytemperaturedepth logger mounted on an autonomous underwater vehicle and additionalinstrumentation. These measurements revealed a cylindrical density anomaly with a radius of , 110 m extendingfrom the surface to , 14 m depth. The observed radius is smaller than the internal Rossby radius of deformation(, 200 m), which suggests a cyclogeostrophic balance between centripetal, Coriolis, and pressure forces. Themaximum azimuthal velocity, calculated assuming this balance, was , 2.1 cm s21 at 68 m depth. The Rossbynumber associated with this velocity was 1.7; this is consistent with the cyclogeostrophic assumption (i.e., Rossbynumber . 1) and nearly twice that of similar under-ice eddies in the Arctic Ocean. The estimated Ekman spindowntimescale is 1.515 d, but despite this, the gyre appeared to be relatively unchanged over 6 d of fieldobservations. This persistence implies the gyre was forced over the course of the field study; however, the sourceof the forcing is unknown. Horizontal temperature transects at and below the bottom of the gyre revealedcoherent temperature fluctuations suggestive of vertical transport associated with the gyre. |
format |
Article in Journal/Newspaper |
author |
Forrest, AL Laval, BE Pieters, R Lim, DSS |
author_facet |
Forrest, AL Laval, BE Pieters, R Lim, DSS |
author_sort |
Forrest, AL |
title |
A cyclonic gyre in an ice-covered lake |
title_short |
A cyclonic gyre in an ice-covered lake |
title_full |
A cyclonic gyre in an ice-covered lake |
title_fullStr |
A cyclonic gyre in an ice-covered lake |
title_full_unstemmed |
A cyclonic gyre in an ice-covered lake |
title_sort |
cyclonic gyre in an ice-covered lake |
publisher |
Amer Soc Limnology Oceanography |
publishDate |
2013 |
url |
https://doi.org/10.4319/lo.2013.58.1.0363 http://ecite.utas.edu.au/82237 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
http://ecite.utas.edu.au/82237/1/Forrest_etal(2013)_LO.pdf http://dx.doi.org/10.4319/lo.2013.58.1.0363 Forrest, AL and Laval, BE and Pieters, R and Lim, DSS, A cyclonic gyre in an ice-covered lake, Limnology and Oceanography, 58, (1) pp. 363-375. ISSN 0024-3590 (2013) [Refereed Article] http://ecite.utas.edu.au/82237 |
op_doi |
https://doi.org/10.4319/lo.2013.58.1.0363 |
container_title |
Limnology and Oceanography |
container_volume |
58 |
container_issue |
1 |
container_start_page |
363 |
op_container_end_page |
375 |
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1766338255294300160 |