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A Parameter Model of Gas Exchange for the Seasonal Sea Ice Zone : Volume 10, Issue 1 (28/01/2014)

By Loose, B.

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Book Id: WPLBN0004020181
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: A Parameter Model of Gas Exchange for the Seasonal Sea Ice Zone : Volume 10, Issue 1 (28/01/2014)  
Author: Loose, B.
Volume: Vol. 10, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Perovich, D., Zappa, C. J., Mcgillis, W. R., Loose, B., & Schlosser, P. (2014). A Parameter Model of Gas Exchange for the Seasonal Sea Ice Zone : Volume 10, Issue 1 (28/01/2014). Retrieved from http://worldebookfair.org/


Description
Description: Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Rd., Narragansett, RI, 02882, USA. 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.

Summary
A parameter model of gas exchange for the seasonal sea ice zone

Excerpt
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