A parameter model of gas exchange for the seasonal sea ice zone
Carbon budgets for the polar oceans require better constraint on air–sea gas exchange in the sea ice zone (SIZ). Here, we utilize advances in the theory of turbulence, mixing and air–sea flux in the ice–ocean boundary layer (IOBL) to formulate a simple model for gas exchange when the surface ocean i...
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Copernicus Publications
2014
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Online Access: | https://doi.org/10.5194/os-10-17-2014 http://www.ocean-sci.net/10/17/2014/os-10-17-2014.pdf https://doaj.org/article/80b3ceb44bb543d183d361fe0371b2e0 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:80b3ceb44bb543d183d361fe0371b2e0 2023-05-15T15:10:26+02:00 A parameter model of gas exchange for the seasonal sea ice zone B. Loose W. R. McGillis D. Perovich C. J. Zappa P. Schlosser 2014-01-01 https://doi.org/10.5194/os-10-17-2014 http://www.ocean-sci.net/10/17/2014/os-10-17-2014.pdf https://doaj.org/article/80b3ceb44bb543d183d361fe0371b2e0 en eng Copernicus Publications 1812-0784 1812-0792 doi:10.5194/os-10-17-2014 http://www.ocean-sci.net/10/17/2014/os-10-17-2014.pdf https://doaj.org/article/80b3ceb44bb543d183d361fe0371b2e0 undefined Ocean Science, Vol 10, Iss 1, Pp 17-28 (2014) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.5194/os-10-17-2014 2023-01-22T17:51:00Z Carbon budgets for the polar oceans require better constraint on air–sea gas exchange in the sea ice zone (SIZ). Here, we utilize advances in the theory of turbulence, mixing and air–sea flux in the ice–ocean boundary layer (IOBL) to formulate a simple model for gas exchange when the surface ocean is partially covered by sea ice. The gas transfer velocity (k) is related to shear-driven and convection-driven turbulence in the aqueous mass boundary layer, and to the mean-squared wave slope at the air–sea interface. We use the model to estimate k along the drift track of ice-tethered profilers (ITPs) in the Arctic. Individual estimates of daily-averaged k from ITP drifts ranged between 1.1 and 22 m d−1, and the fraction of open water (f) ranged from 0 to 0.83. Converted to area-weighted effective transfer velocities (keff), the minimum value of keff was 10−55 m d−1 near f = 0 with values exceeding keff = 5 m d−1 at f = 0.4. The model indicates that effects from shear and convection in the sea ice zone contribute an additional 40% to the magnitude of keff, beyond what would be predicted from an estimate of keff based solely upon a wind speed parameterization. Although the ultimate scaling relationship for gas exchange in the sea ice zone will require validation in laboratory and field studies, the basic parameter model described here demonstrates that it is feasible to formulate estimates of k based upon properties of the IOBL using data sources that presently exist. Article in Journal/Newspaper Arctic Sea ice Unknown Arctic Ocean Science 10 1 17 28 |
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Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir B. Loose W. R. McGillis D. Perovich C. J. Zappa P. Schlosser A parameter model of gas exchange for the seasonal sea ice zone |
topic_facet |
geo envir |
description |
Carbon budgets for the polar oceans require better constraint on air–sea gas exchange in the sea ice zone (SIZ). Here, we utilize advances in the theory of turbulence, mixing and air–sea flux in the ice–ocean boundary layer (IOBL) to formulate a simple model for gas exchange when the surface ocean is partially covered by sea ice. The gas transfer velocity (k) is related to shear-driven and convection-driven turbulence in the aqueous mass boundary layer, and to the mean-squared wave slope at the air–sea interface. We use the model to estimate k along the drift track of ice-tethered profilers (ITPs) in the Arctic. Individual estimates of daily-averaged k from ITP drifts ranged between 1.1 and 22 m d−1, and the fraction of open water (f) ranged from 0 to 0.83. Converted to area-weighted effective transfer velocities (keff), the minimum value of keff was 10−55 m d−1 near f = 0 with values exceeding keff = 5 m d−1 at f = 0.4. The model indicates that effects from shear and convection in the sea ice zone contribute an additional 40% to the magnitude of keff, beyond what would be predicted from an estimate of keff based solely upon a wind speed parameterization. Although the ultimate scaling relationship for gas exchange in the sea ice zone will require validation in laboratory and field studies, the basic parameter model described here demonstrates that it is feasible to formulate estimates of k based upon properties of the IOBL using data sources that presently exist. |
format |
Article in Journal/Newspaper |
author |
B. Loose W. R. McGillis D. Perovich C. J. Zappa P. Schlosser |
author_facet |
B. Loose W. R. McGillis D. Perovich C. J. Zappa P. Schlosser |
author_sort |
B. Loose |
title |
A parameter model of gas exchange for the seasonal sea ice zone |
title_short |
A parameter model of gas exchange for the seasonal sea ice zone |
title_full |
A parameter model of gas exchange for the seasonal sea ice zone |
title_fullStr |
A parameter model of gas exchange for the seasonal sea ice zone |
title_full_unstemmed |
A parameter model of gas exchange for the seasonal sea ice zone |
title_sort |
parameter model of gas exchange for the seasonal sea ice zone |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/os-10-17-2014 http://www.ocean-sci.net/10/17/2014/os-10-17-2014.pdf https://doaj.org/article/80b3ceb44bb543d183d361fe0371b2e0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
Ocean Science, Vol 10, Iss 1, Pp 17-28 (2014) |
op_relation |
1812-0784 1812-0792 doi:10.5194/os-10-17-2014 http://www.ocean-sci.net/10/17/2014/os-10-17-2014.pdf https://doaj.org/article/80b3ceb44bb543d183d361fe0371b2e0 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/os-10-17-2014 |
container_title |
Ocean Science |
container_volume |
10 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
28 |
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1766341467564933120 |