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contributor authorKeitzl, T.
contributor authorMellado, J. P.
contributor authorNotz, D.
date accessioned2017-06-09T17:21:37Z
date available2017-06-09T17:21:37Z
date copyright2016/04/01
date issued2016
identifier issn0022-3670
identifier otherams-83796.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227060
description abstractirect numerical simulation and laboratory experiments are used to investigate turbulent convection beneath a horizontal ice?water interface. Scaling laws are derived that quantify the dependence of the melt rate of the ice on the far-field temperature of the water under purely thermally driven conditions. The scaling laws, the simulations, and the laboratory experiments consistently yield that the melt rate increases by two orders of magnitude, from ?101 to ?103 mm day?1, as the far-field temperature increases from 4° to 8°C. The strong temperature dependence of the melt rate is explained by analyzing the vertical structure of the flow: For far-field temperatures below 8°C, the flow features a stably stratified, diffusive layer next to the ice that shields it from the warmer, turbulent outer layer. The stratification in the diffusive layer diminishes as the far-field temperature increases and vanishes for far-field temperatures far above 8°C. Possible implications of these results for ice?ocean interfaces are discussed. The drastic melt-rate increase implies that turbulence needs to be considered in the analysis of ice?water interfaces even in shear-free conditions.
publisherAmerican Meteorological Society
titleImpact of Thermally Driven Turbulence on the Bottom Melting of Ice
typeJournal Paper
journal volume46
journal issue4
journal titleJournal of Physical Oceanography
identifier doi10.1175/JPO-D-15-0126.1
journal fristpage1171
journal lastpage1187
treeJournal of Physical Oceanography:;2016:;Volume( 046 ):;issue: 004
contenttypeFulltext


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