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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2014
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Online Access: | https://doi.org/10.7916/D81N810B |
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D81N810B 2023-05-15T15:12:14+02:00 A parameter model of gas exchange for the seasonal sea ice zone Loose, B. McGillis, Wade R. Perovich, D. Zappa, Christopher J. Schlosser, Peter 2014 https://doi.org/10.7916/D81N810B English eng European Geosciences Union https://doi.org/10.7916/D81N810B Ocean-atmosphere interaction Atmospheric turbulence--Mathematical models Sea ice Oceanography Mathematics Meteorology Articles 2014 ftcolumbiauniv https://doi.org/10.7916/D81N810B 2019-04-04T08:14:09Z 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 Columbia University: Academic Commons Arctic |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Ocean-atmosphere interaction Atmospheric turbulence--Mathematical models Sea ice Oceanography Mathematics Meteorology |
spellingShingle |
Ocean-atmosphere interaction Atmospheric turbulence--Mathematical models Sea ice Oceanography Mathematics Meteorology Loose, B. McGillis, Wade R. Perovich, D. Zappa, Christopher J. Schlosser, Peter A parameter model of gas exchange for the seasonal sea ice zone |
topic_facet |
Ocean-atmosphere interaction Atmospheric turbulence--Mathematical models Sea ice Oceanography Mathematics Meteorology |
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 |
Loose, B. McGillis, Wade R. Perovich, D. Zappa, Christopher J. Schlosser, Peter |
author_facet |
Loose, B. McGillis, Wade R. Perovich, D. Zappa, Christopher J. Schlosser, Peter |
author_sort |
Loose, B. |
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 |
European Geosciences Union |
publishDate |
2014 |
url |
https://doi.org/10.7916/D81N810B |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
https://doi.org/10.7916/D81N810B |
op_doi |
https://doi.org/10.7916/D81N810B |
_version_ |
1766342941425532928 |