Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline
Energy transfer from the atmosphere into the upper Arctic Ocean is expected to become more efficient as summer sea-ice coverage decreases and multiyear ice thins due to recent atmospheric warming. However, relatively little is known about how energy is transferred within the ocean by turbulent proce...
Published in: | Journal of Geophysical Research: Oceans |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | https://doi.org/10.1002/2014JC010381 https://researchportal.port.ac.uk/portal/en/publications/characterizing-horizontal-variability-and-energy-spectra-in-the-arctic-ocean-halocline(6fc9c7c8-53ca-4321-ae99-8d7ccbd16b2d).html https://researchportal.port.ac.uk/ws/files/2476758/Characterizing_horizontal_variability.pdf http://doi.wiley.com/10.1002/2014JC010381 |
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ftunivportsmpubl:oai:researchportal.port.ac.uk:publications/6fc9c7c8-53ca-4321-ae99-8d7ccbd16b2d 2023-05-15T13:22:45+02:00 Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline Marcinko, Charlotte L. J. Martin, Adrian P. Allen, John T. 2015-02-17 application/pdf https://doi.org/10.1002/2014JC010381 https://researchportal.port.ac.uk/portal/en/publications/characterizing-horizontal-variability-and-energy-spectra-in-the-arctic-ocean-halocline(6fc9c7c8-53ca-4321-ae99-8d7ccbd16b2d).html https://researchportal.port.ac.uk/ws/files/2476758/Characterizing_horizontal_variability.pdf http://doi.wiley.com/10.1002/2014JC010381 eng eng info:eu-repo/semantics/openAccess Marcinko , C L J , Martin , A P & Allen , J T 2015 , ' Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline ' Journal of Geophysical Research: Oceans , vol 120 , no. 1 , pp. 436-450 . DOI:10.1002/2014JC010381 RCUK NERC NE/I028408/1 /dk/atira/pure/core/subjects/earthsci Earth Sciences article 2015 ftunivportsmpubl https://doi.org/10.1002/2014JC010381 2017-09-28T19:34:03Z Energy transfer from the atmosphere into the upper Arctic Ocean is expected to become more efficient as summer sea-ice coverage decreases and multiyear ice thins due to recent atmospheric warming. However, relatively little is known about how energy is transferred within the ocean by turbulent processes from large to small scales in the presence of ice and how these pathways might change in future. This study characterises horizontal variability in several regions of the Eurasian Arctic Ocean under differing sea-ice conditions. Historic along track CTD data collected by a Royal Navy submarine during summer 1996 allows a unique examination of horizontal variability and associated wavenumber spectra within the Arctic Ocean halocline. Spectral analysis indicates that potential energy variance under perennial sea-ice in the Amundsen Basin is O(100) less than within the Marginal Ice Zone (MIZ) of Fram Strait. Spectra from all regions show a transition in scaling at wavelengths of approximately 5 to 7 km. At scales greater than the transition wavelength to 50 km, energy spectra are consistent with a k-3 scaling (where k is wavenumber) and interior quasi-geostrophic dynamics. The scaling of spectra at these scales is extremely similar between regions suggesting similar dynamics and energy exchange pathways. The k-3 scaling is steeper than typically found in regions of mid latitude open ocean. At scales below the transition wavelength to 300 m, spectra are close to a k-5/3 scaling or flatter, indicating a change in dynamics, which is potentially due to internal waves dominating variability at small scales. Article in Journal/Newspaper amundsen basin Arctic Arctic Arctic Ocean Fram Strait Sea ice University of Portsmouth: Portsmouth Research Portal Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Journal of Geophysical Research: Oceans 120 1 436 450 |
institution |
Open Polar |
collection |
University of Portsmouth: Portsmouth Research Portal |
op_collection_id |
ftunivportsmpubl |
language |
English |
topic |
RCUK NERC NE/I028408/1 /dk/atira/pure/core/subjects/earthsci Earth Sciences |
spellingShingle |
RCUK NERC NE/I028408/1 /dk/atira/pure/core/subjects/earthsci Earth Sciences Marcinko, Charlotte L. J. Martin, Adrian P. Allen, John T. Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
topic_facet |
RCUK NERC NE/I028408/1 /dk/atira/pure/core/subjects/earthsci Earth Sciences |
description |
Energy transfer from the atmosphere into the upper Arctic Ocean is expected to become more efficient as summer sea-ice coverage decreases and multiyear ice thins due to recent atmospheric warming. However, relatively little is known about how energy is transferred within the ocean by turbulent processes from large to small scales in the presence of ice and how these pathways might change in future. This study characterises horizontal variability in several regions of the Eurasian Arctic Ocean under differing sea-ice conditions. Historic along track CTD data collected by a Royal Navy submarine during summer 1996 allows a unique examination of horizontal variability and associated wavenumber spectra within the Arctic Ocean halocline. Spectral analysis indicates that potential energy variance under perennial sea-ice in the Amundsen Basin is O(100) less than within the Marginal Ice Zone (MIZ) of Fram Strait. Spectra from all regions show a transition in scaling at wavelengths of approximately 5 to 7 km. At scales greater than the transition wavelength to 50 km, energy spectra are consistent with a k-3 scaling (where k is wavenumber) and interior quasi-geostrophic dynamics. The scaling of spectra at these scales is extremely similar between regions suggesting similar dynamics and energy exchange pathways. The k-3 scaling is steeper than typically found in regions of mid latitude open ocean. At scales below the transition wavelength to 300 m, spectra are close to a k-5/3 scaling or flatter, indicating a change in dynamics, which is potentially due to internal waves dominating variability at small scales. |
format |
Article in Journal/Newspaper |
author |
Marcinko, Charlotte L. J. Martin, Adrian P. Allen, John T. |
author_facet |
Marcinko, Charlotte L. J. Martin, Adrian P. Allen, John T. |
author_sort |
Marcinko, Charlotte L. J. |
title |
Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
title_short |
Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
title_full |
Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
title_fullStr |
Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
title_full_unstemmed |
Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline |
title_sort |
characterizing horizontal variability and energy spectra in the arctic ocean halocline |
publishDate |
2015 |
url |
https://doi.org/10.1002/2014JC010381 https://researchportal.port.ac.uk/portal/en/publications/characterizing-horizontal-variability-and-energy-spectra-in-the-arctic-ocean-halocline(6fc9c7c8-53ca-4321-ae99-8d7ccbd16b2d).html https://researchportal.port.ac.uk/ws/files/2476758/Characterizing_horizontal_variability.pdf http://doi.wiley.com/10.1002/2014JC010381 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) |
geographic |
Amundsen Basin Arctic Arctic Ocean |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean |
genre |
amundsen basin Arctic Arctic Arctic Ocean Fram Strait Sea ice |
genre_facet |
amundsen basin Arctic Arctic Arctic Ocean Fram Strait Sea ice |
op_source |
Marcinko , C L J , Martin , A P & Allen , J T 2015 , ' Characterizing horizontal variability and energy spectra in the Arctic Ocean halocline ' Journal of Geophysical Research: Oceans , vol 120 , no. 1 , pp. 436-450 . DOI:10.1002/2014JC010381 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2014JC010381 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
1 |
container_start_page |
436 |
op_container_end_page |
450 |
_version_ |
1766366704665886720 |