Mountain torque and its influence on the atmospheric angular momentum on Titan
Mountain torque and its influence on the atmospheric angular momentum on Titan
复制标题
泰坦上的山力矩及其对大气角动量的影响
DOI：
10.1016/j.icarus.2012.06.027
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发表时间：
2012
期刊：
影响因子：
3.2
通讯作者：
Tokano
中科院分区：
文献类型：
--
作者：
Tokano
土卫六的大尺度地形和表面粗糙度对大气角动量收支的影响进行了研究的科隆土卫六大气环流模式，是运行和不受地形约束的卡西尼。在季节时间尺度上，角动量交换主要由摩擦力矩控制，摩擦力矩每半年振荡一次。地形引起一个大的昼夜和小的季节性山地扭矩。周日的山脉扭矩是由与土星潮汐相关的表面压力变化引起的，但对大气角动量没有净影响。季节性的山地扭矩主要是由低纬度山区受到东风地面风的影响。季节性的山脉扭矩导致角动量从地表到大气的净转移，这被摩擦扭矩的相反角动量转移所抵消。当考虑地形时，大气角动量较大。
The impact of Titan’s large-scale topography and surface roughness on the atmospheric angular momentum budget is investigated by the Cologne Titan general circulation model that is run with and without topography constrained by Cassini. On seasonal timescales the angular momentum exchange is dominated by the friction torque, which oscillates semi-annually. Topography gives rise to a large diurnal and small seasonal mountain torque. The diurnal mountain torque is caused by surface pressure variations associated with Saturn’s tide, but has no net effect on the atmospheric angular momentum. The seasonal mountain torque is mainly contributed by low-latitude mountains that are hit by easterly surface winds. The seasonal mountain torque causes a net transfer of angular momentum from the surface to the atmosphere, which is counterbalanced by an opposite angular momentum transfer by the friction torque. The atmospheric angular momentum is larger if topography is included.
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影响因子：
5.2
作者：
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通讯作者：
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影响因子：
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