Oxygen isotope fractionation during the freezing of sea water

Toyota, Takenobu; Smith, Inga J.; Gough, Alexander J.; Langhorne, Patricia J.; Leonard, Gregory H.; Van Hale, Robert J.; Mahoney, Andrew R.; Haskell, Timothy G.

Oxygen isotope fractionation during the freezing of sea water

Toyota, Takenobu; Smith, Inga J.; Gough, Alexander J. et al.

Journal of glaciology, 2013, 59(216), 697-710

Permalink : https://hdl.handle.net/2115/54530

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アクセス権	open access
URI	https://hdl.handle.net/2115/54530
タイトル	Oxygen isotope fractionation during the freezing of sea water
著者	Toyota, Takenobu ; Smith, Inga J. ; Gough, Alexander J. ; Langhorne, Patricia J. ; Leonard, Gregory H. ; Van Hale, Robert J. ; Mahoney, Andrew R. ; Haskell, Timothy G.
e-Rad_Researcher 80312411 著者名 Toyota, Takenobu
著者名 Smith, Inga J.
著者名 Gough, Alexander J.
著者名 Langhorne, Patricia J.
著者名 Leonard, Gregory H.
著者名 Van Hale, Robert J.
著者名 Mahoney, Andrew R.
著者名 Haskell, Timothy G.
言語	英語
発行日	2013-08-01
出版者	Int glaciol soc
収録物名	Journal of glaciology
巻(号)	59(216)
ページ	697-710
抄録	The dependence of oxygen isotope fractionation on ice growth rate during the freezing of sea water is investigated based on laboratory experiments and field observations in McMurdo Sound, Antarctica. The laboratory experiments were performed in a tank filled with sea water, with sea ice grown under calm conditions at various room temperatures ranging from -5 degrees C to -20 degrees C. In McMurdo Sound, the ice growth rate was monitored using thermistor probes for first-year landfast ice that grew to similar to 2m in thickness. Combining these datasets allows, for the first time, examination of fractionation at a wide range of growth rates from 0.8 x 10(-7) to 9.3 x 10(-7) m s(-1). In the analysis a stagnant boundary-layer model is parameterized using these two independent datasets. As a result, the optimum values of equilibrium pure-ice fractionation factor and boundary-layer thickness are estimated. It is suggested that a regime shift may occur at a growth rate of similar to 2.0 x 10(-7) m s(-1). A case study on sea ice in the Sea of Okhotsk, where the growth rate is modeled by coupling the thermodynamic properties of the sea ice with meteorological data, demonstrates the utility of the fitted models.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	© 2013 International Glaciological Society
PISSN	0022-1430
関連情報	URI http://www.igsoc.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3189/2013JoG12J163