Numerical simulation of tides and oceanic angular momentum of Titan’s hydrocarbon seas

Numerical simulation of tides and oceanic angular momentum of Titan’s hydrocarbon seas
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泰坦烃海潮汐和海洋角动量的数值模拟

DOI:
10.1016/j.icarus.2014.08.021
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发表时间:
2014
期刊:
影响因子:
3.2
通讯作者:
Van Hoolst
Van Hoolst
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tokano;Lorenz;Van Hoolst

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利用卡西尼号约束的水深图,用三维海洋环流模式对土卫六碳氢化合物海的潮汐和潮流进行了数值模拟。这些预报被用来计算海洋角动量的潮汐引起的变化。潮汐在北岸和南岸表现为反节点的准驻波。Kraken Mare的潮流主要沿着海洋的长轴方向,并由通过狭窄海峡的快速水力水流主导。轴向海洋角动量的变化主要是由于克拉肯海湾液体的重新分配,并在北岸落潮和南岸洪水时达到最大。另一方面,赤道海洋角动量的变化是由潮汐和潮流共同贡献的。海洋与海底之间的扭矩与大气扭矩相比较小,即大气与山脉之间的山体扭矩。
Tides and tidal currents in Titan’s hydrocarbon seas are numerically simulated by a 3-dimensional ocean circulation model using a bathymetry map constrained by Cassini. These predictions are used to calculate the tidally induced variations of the oceanic angular momentum of the seas. The tides behave as a quasi-standing wave with anti-nodes at the northern and southern shores. The tidal currents in Kraken Mare are mainly oriented along the major axis of the sea and are dominated by fast hydraulic currents through a narrow strait. The axial oceanic angular momentum primarily changes due to redistribution of liquids in Kraken Mare and maximizes when there is ebb at the northern shore and flood at the southern shore. On the other hand, variations of the equatorial oceanic angular momentum are contributed by both tides and tidal currents. The oceanic torque between sea and sea bottom is minor compared to its atmospheric counterpart, i.e. the mountain torque between atmosphere and mountains.
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