Wave Flow Simulations Over Arctic Leads |
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| Authors: | Email author" target="_blank">Thorsten?MauritsenEmail author Gunilla?Svensson Branko?Grisogono |
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| Institution: | (1) Department of Meteorology, Stockholm University, S-10691 Stockholm, Sweden;(2) Department of Geophysics, Faculty of Science, Zagreb, Croatia |
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| Abstract: | We investigate the flow over Arctic leads using a mesoscale numerical model, typical of both summer and winter, under idealised
conditions. We find that Arctic leads may be the source of standing atmospheric internal gravity waves during both seasons.
The summertime wave may be compared with the wave generated by a small ridge, though with the phase reversed. The mechanism
for exciting the wave is found to be the internal boundary layer developing due to horizontal variations in surface temperature
and roughness length. During the more exploratory wintertime simulations, with substantial temperature difference between
the lead and the ice surface, we find that secondary circulations and intermittent wave-breaking may occur. The effects of
the lead appear far downstream. |
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| Keywords: | Arctic Gravity waves Ice leads Intermittent and elevated turbulence Wave-breaking |
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