Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic
Summer sea ice extent in the Western Arctic has decreased significantly in recent years resulting in increased solar input into the upper ocean. Here, a comprehensive set of 'in situ' shipboard, on-ice, and autonomous ice-ocean measurements were made of the early stages of formation of the...
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ftdoajarticles:oai:doaj.org/article:4173d206768e4bedadde2a54fefd01cf 2023-05-15T15:01:52+02:00 Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic Shawn G. Gallaher Timothy P. Stanton William J. Shaw Sung-Ho Kang Joo-Hong Kim Kyoung-Ho Cho 2017-03-01T00:00:00Z https://doi.org/10.1525/elementa.195 https://doaj.org/article/4173d206768e4bedadde2a54fefd01cf EN eng BioOne https://www.elementascience.org/articles/195 https://doaj.org/toc/2325-1026 2325-1026 doi:10.1525/elementa.195 https://doaj.org/article/4173d206768e4bedadde2a54fefd01cf Elementa: Science of the Anthropocene, Vol 5 (2017) Near-surface temperature maximum Local turbulence closure model Turbulent fluxes Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.1525/elementa.195 2023-01-08T01:36:56Z Summer sea ice extent in the Western Arctic has decreased significantly in recent years resulting in increased solar input into the upper ocean. Here, a comprehensive set of 'in situ' shipboard, on-ice, and autonomous ice-ocean measurements were made of the early stages of formation of the near-surface temperature maximum (NSTM) in the Canada Basin. These observations along with the results from a 1-D turbulent boundary layer model indicate that heat storage associated with NSTM formation is largely due to the absorption of penetrating solar radiation just below a protective summer halocline. The depth of the summer halocline was found to be the most important factor for determining the amount of solar radiation absorbed in the NSTM layer, while halocline strength controlled the amount of heat removed from the NSTM by turbulent transport. Observations using the Naval Postgraduate School Turbulence Frame show that the NSTM was able to persist despite periods of intermittent turbulence because transport rates were too small to remove significant amounts of heat from the NSTM layer. The development of the early and late summer halocline and NSTM were found to be linked to summer season buoyancy and wind events. For the early summer NSTM, 1-D boundary layer model results show that melt pond drainage provides sufficient buoyancy to the summer halocline to prevent subsequent wind events from mixing out the NSTM. For the late summer NSTM, limited freshwater inputs reduce the strength of the summer halocline making the balance between interfacial stresses and buoyancy more tenuous. As a result, the late summer NSTM is an ephemeral feature dependent on local wind conditions, while the early summer NSTM is more persistent and able to store heat in the near-surface ocean beyond the summer season. Article in Journal/Newspaper Arctic canada basin Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Canada Elementa: Science of the Anthropocene 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Near-surface temperature maximum Local turbulence closure model Turbulent fluxes Environmental sciences GE1-350 |
spellingShingle |
Near-surface temperature maximum Local turbulence closure model Turbulent fluxes Environmental sciences GE1-350 Shawn G. Gallaher Timothy P. Stanton William J. Shaw Sung-Ho Kang Joo-Hong Kim Kyoung-Ho Cho Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
topic_facet |
Near-surface temperature maximum Local turbulence closure model Turbulent fluxes Environmental sciences GE1-350 |
description |
Summer sea ice extent in the Western Arctic has decreased significantly in recent years resulting in increased solar input into the upper ocean. Here, a comprehensive set of 'in situ' shipboard, on-ice, and autonomous ice-ocean measurements were made of the early stages of formation of the near-surface temperature maximum (NSTM) in the Canada Basin. These observations along with the results from a 1-D turbulent boundary layer model indicate that heat storage associated with NSTM formation is largely due to the absorption of penetrating solar radiation just below a protective summer halocline. The depth of the summer halocline was found to be the most important factor for determining the amount of solar radiation absorbed in the NSTM layer, while halocline strength controlled the amount of heat removed from the NSTM by turbulent transport. Observations using the Naval Postgraduate School Turbulence Frame show that the NSTM was able to persist despite periods of intermittent turbulence because transport rates were too small to remove significant amounts of heat from the NSTM layer. The development of the early and late summer halocline and NSTM were found to be linked to summer season buoyancy and wind events. For the early summer NSTM, 1-D boundary layer model results show that melt pond drainage provides sufficient buoyancy to the summer halocline to prevent subsequent wind events from mixing out the NSTM. For the late summer NSTM, limited freshwater inputs reduce the strength of the summer halocline making the balance between interfacial stresses and buoyancy more tenuous. As a result, the late summer NSTM is an ephemeral feature dependent on local wind conditions, while the early summer NSTM is more persistent and able to store heat in the near-surface ocean beyond the summer season. |
format |
Article in Journal/Newspaper |
author |
Shawn G. Gallaher Timothy P. Stanton William J. Shaw Sung-Ho Kang Joo-Hong Kim Kyoung-Ho Cho |
author_facet |
Shawn G. Gallaher Timothy P. Stanton William J. Shaw Sung-Ho Kang Joo-Hong Kim Kyoung-Ho Cho |
author_sort |
Shawn G. Gallaher |
title |
Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
title_short |
Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
title_full |
Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
title_fullStr |
Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
title_full_unstemmed |
Field observations and results of a 1-D boundary layer model for developing near-surface temperature maxima in the Western Arctic |
title_sort |
field observations and results of a 1-d boundary layer model for developing near-surface temperature maxima in the western arctic |
publisher |
BioOne |
publishDate |
2017 |
url |
https://doi.org/10.1525/elementa.195 https://doaj.org/article/4173d206768e4bedadde2a54fefd01cf |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic canada basin Sea ice |
genre_facet |
Arctic canada basin Sea ice |
op_source |
Elementa: Science of the Anthropocene, Vol 5 (2017) |
op_relation |
https://www.elementascience.org/articles/195 https://doaj.org/toc/2325-1026 2325-1026 doi:10.1525/elementa.195 https://doaj.org/article/4173d206768e4bedadde2a54fefd01cf |
op_doi |
https://doi.org/10.1525/elementa.195 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
5 |
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1766333866000252928 |