Venus/Titan‐type superrotation driven by stratospheric heating and intermittency seen in the superrotation dynamics are investigated using an idealized general circulation model in a high Rossby number regime (Ro = 7.5 to 23 for the strongest zonal jet) where the superrotation is formed by the meridional circulation and equatorward eddy momentum flux. When the jet core has a Rossby number of ∼23 on a slowly rotating or small planet, fast planetary‐scale Rossby waves are transiently amplified by both barotropic and baroclinic energy conversion and intermittently produce equatorward eddy momentum fluxes. At high latitudes, poleward eddy momentum transport also occurs when the poleward heat flux of baroclinic eddies is strong. On such a slowly rotating or small‐sized planet, equatorial superrotation is developed efficiently by weak, intermittent equatorward momentum flux in the presence of polar indirect circulation and the speed of the zonal flow is roughly constant over the low‐ and mid‐latitudes. In contrast, on a relatively fast rotating or large‐sized planet when the Rossby number is ∼7.5 for the jet core, although the zonal jets and equatorward eddy momentum fluxes intensify, equatorial superrotation is not developed efficiently (i.e., the superrotation intensity and its equatorial efficiency are small). Strong equatorward eddy momentum fluxes are produced continuously by slow barotropic Rossby waves on the equatorward flanks of the jets developed by the strong meridional circulation. The poleward heat fluxes of baroclinic waves are negligible because it is much smaller than the heat flux of the zonal‐mean meridional circulation.

中文翻译：

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金星/钛型超旋转的Rossby数依赖性及其相关的间歇性

通过平流层加热和间歇在superrotation动力学看出从动金星/泰坦型superrotation使用在高罗斯贝数制度的一个理想化的环流模式（调查滚装 对于最强的纬向射流，其= 7.5至23），其中超旋转是由子午环流和赤道涡动量通量形成的。当射流芯在缓慢旋转或较小的行星上的Rossby数约为23时，快速行星尺度的Rossby波通过正压和斜压能量转换而被瞬时放大，并间歇地产生赤道涡动量通量。在高纬度地区，斜压涡流的极向热通量较大时，也会发生极向涡动量传递。在这样一个缓慢旋转的或小尺寸的行星上，赤道超旋转是在存在极性间接循环的情况下通过弱的，间歇性的赤道动量通量有效地产生的，纬向流的速度在低纬度和中纬度大致恒定。相比之下，在相对快速旋转或大型的行星上，当射流核心的Rossby数约为7.5时，尽管纬向射流和赤道涡流动量通量增强了，但赤道超旋转没有得到有效发展（即，超旋转强度及其赤道效率为小的）。强烈的子午环流在射流的赤道侧面产生缓慢的正压罗斯比波，连续产生强的赤道涡动量通量。斜压波的极向热通量可以忽略不计，因为它远小于纬向平均子午环流的热通量。超旋转强度及其赤道效率很小）。强烈的子午环流在射流的赤道侧面产生缓慢的正压罗斯比波，连续产生强的赤道涡动量通量。斜压波的极向热通量可以忽略不计，因为它远小于纬向平均子午环流的热通量。超旋转强度及其赤道效率很小）。强烈的子午环流在射流的赤道侧面产生缓慢的正压罗斯比波，连续产生强的赤道涡动量通量。斜压波的极向热通量可以忽略不计，因为它远小于纬向平均子午环流的热通量。