DAI Haijin, CUI Jian, YU Jingping. Revisiting mesoscale eddy genesis mechanism of nonlinear advection in a marginal ice zone[J]. Acta Oceanologica Sinica, 2017, 36(11): 14-20. doi: 10.1007/s13131-017-1134-8
Citation: DAI Haijin, CUI Jian, YU Jingping. Revisiting mesoscale eddy genesis mechanism of nonlinear advection in a marginal ice zone[J]. Acta Oceanologica Sinica, 2017, 36(11): 14-20. doi: 10.1007/s13131-017-1134-8

Revisiting mesoscale eddy genesis mechanism of nonlinear advection in a marginal ice zone

doi: 10.1007/s13131-017-1134-8
  • Received Date: 2017-03-07
  • Rev Recd Date: 2017-05-04
  • A three-dimensional (3-D) ocean model is coupled with a two-dimensional (2-D) sea ice model, to revisit a nonlinear advection mechanism, one of the most important mesoscale eddy genesis mechanisms in the marginal ice zone. Two-dimensional ocean model simulations suggest nonlinear advection mechanism is more important when the water gets shallower. Instead of considering the ocean as barotropic fluid in the 2-D ocean model, the 3-D ocean model allows the sea ice to affect the current directly in the surface layer via ocean-ice interaction. It is found that both mesoscale eddy and sea surface elevation are sensitive to changes in a water depth in the 3-D simulations. The vertical profile of a current velocity in 3-D experiments suggests that when the water depth gets shallower, the current move faster in each layer, which makes the sea surface elevation be nearly inverse proportional to the water depth with the same wind forcing during the same time. It is also found that because of the vertical motion, the magnitude of variations in the sea surface elevation in the 3-D simulations is very small, being only 1% of the change in the 2-D simulations. And it seems the vertical motion to be the essential reason for the differences between the 3-D and 2-D experiments.
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