Fission of Heton-like Vortices under Sea Ice
Close interactions among vertically stacked pairs of counter-rotating eddies under sea ice were investigated in numerical experiments. The numerical model contains a stratified ocean capped by an ice layer. Under the ice layer, a shallow brine source produces a top cyclone and a submerged anticyclon...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.613.9390 2023-05-15T15:07:09+02:00 Fission of Heton-like Vortices under Sea Ice Shenn-yu Chao Ping-tung Shaw The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.613.9390 http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.613.9390 http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf text ftciteseerx 2016-01-08T14:39:12Z Close interactions among vertically stacked pairs of counter-rotating eddies under sea ice were investigated in numerical experiments. The numerical model contains a stratified ocean capped by an ice layer. Under the ice layer, a shallow brine source produces a top cyclone and a submerged anticyclone, while a shallow freshening source generates a top anticyclone and a submerged cyclone. Ice-exerted friction would dissipate the top eddy, leaving the submerged one in lone existence. In this work the winning vorticity is sought from group settings. Arrays of equally spaced salinity sources and sinks, alternate in sign but equal in strength, are employed to produce rows of vertically stacked eddy pairs. Fission occurs when adjacent vortex centers are separated by less than one Rossby radius. This process ejects parcels of density anomalies to the ambient ocean in upper depths. Low salinity anomalies are quickly dispersed into a thin surface layer and are unable to regenerate submerged eddies. High salinity parcels, being difficult to disperse, often maintain or regenerate submerged anticyclones below. Fission is particularly effective if a single row of salinity forcing is used. With multiple rows, fission is active only in the outer rows. The strong interaction among closely packed eddies operates in time scales of tens of days, helping explain the predominance of submerged anticyclones under Arctic sea ice. 1. Text Arctic Sea ice Unknown Arctic Lone ENVELOPE(11.982,11.982,65.105,65.105) |
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ftciteseerx |
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English |
description |
Close interactions among vertically stacked pairs of counter-rotating eddies under sea ice were investigated in numerical experiments. The numerical model contains a stratified ocean capped by an ice layer. Under the ice layer, a shallow brine source produces a top cyclone and a submerged anticyclone, while a shallow freshening source generates a top anticyclone and a submerged cyclone. Ice-exerted friction would dissipate the top eddy, leaving the submerged one in lone existence. In this work the winning vorticity is sought from group settings. Arrays of equally spaced salinity sources and sinks, alternate in sign but equal in strength, are employed to produce rows of vertically stacked eddy pairs. Fission occurs when adjacent vortex centers are separated by less than one Rossby radius. This process ejects parcels of density anomalies to the ambient ocean in upper depths. Low salinity anomalies are quickly dispersed into a thin surface layer and are unable to regenerate submerged eddies. High salinity parcels, being difficult to disperse, often maintain or regenerate submerged anticyclones below. Fission is particularly effective if a single row of salinity forcing is used. With multiple rows, fission is active only in the outer rows. The strong interaction among closely packed eddies operates in time scales of tens of days, helping explain the predominance of submerged anticyclones under Arctic sea ice. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Shenn-yu Chao Ping-tung Shaw |
spellingShingle |
Shenn-yu Chao Ping-tung Shaw Fission of Heton-like Vortices under Sea Ice |
author_facet |
Shenn-yu Chao Ping-tung Shaw |
author_sort |
Shenn-yu Chao |
title |
Fission of Heton-like Vortices under Sea Ice |
title_short |
Fission of Heton-like Vortices under Sea Ice |
title_full |
Fission of Heton-like Vortices under Sea Ice |
title_fullStr |
Fission of Heton-like Vortices under Sea Ice |
title_full_unstemmed |
Fission of Heton-like Vortices under Sea Ice |
title_sort |
fission of heton-like vortices under sea ice |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.613.9390 http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf |
long_lat |
ENVELOPE(11.982,11.982,65.105,65.105) |
geographic |
Arctic Lone |
geographic_facet |
Arctic Lone |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.613.9390 http://www.terrapub.co.jp/journals/JO/pdf/5501/55010065.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766338710495821824 |