Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Full-depth desalination of warm sea ice
Jardon, F.P.; Vivier, F.; Vancoppenolle, M.; Lourenco, A.; Bouruet-Aubertot, P.; Cuypers, Y. (2013). Full-depth desalination of warm sea ice. J. Geophys. Res. Oceans, 118(1): 435-447. dx.doi.org/10.1029/2012JC007962
In: Journal of Geophysical Research. American Geophysical Union: Richmond. ISSN 0148-0227; e-ISSN 2156-2202, meer
|  |
| Auteurs | | Top |
- Jardon, F.P.
- Vivier, F.
- Vancoppenolle, M.
|
- Lourenco, A.
- Bouruet-Aubertot, P.
- Cuypers, Y.
|
|
| Abstract |
The large-scale Arctic sea-ice retreat induces a gradual replacement of thick, multi-year sea ice by thinner first-year ice. The latter has distinctive physical properties and is in particular substantially saltier. It is generally thought that while salt rejection occurs primarily during ice formation in winter, most of the remaining brine is flushed out of the ice by the percolating surface melt water in summer. Here, it is argued that a substantial part of this residual desalination of first-year sea ice can occur well before summer melt, due to brine convection over the full thickness of the ice, once the ice temperature is higher than a threshold that depends on bulk salinity and thickness. This critical temperature is substantially higher than the permeability threshold. The argument stems from a theoretical analysis of the porous Rayleigh number depicting the propensity for convection in the mushy-layer theory. It is supported by simulations performed with a state-of-the-art 1-D sea-ice model. The study was initially motivated by observations collected in March 2007 in Storfjorden, Svalbard. Those are indirect, however, and are thus presented here as a possible example. Two sporadic anomalies of seawater salinity were recorded close to the base of 40 cm thick ice in temperature conditions that are incompatible with ice formation. Analyses and simulations forced with observed atmospheric conditions suggest that the second peak is caused by flushing of meltwater, while the first and most intense peak is likely associated with an episode of brine convection over the full depth of the ice, yielding significant desalination. Citation: Jardon, F. P., F. Vivier, M. Vancoppenolle, A. Lourenco, P. Bouruet-Aubertot, and Y. Cuypers (2013), Full-depth desalination of warm sea ice, J. Geophys. Res. Oceans, 118, 435-447, doi:10.1029/2012JC007962. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
