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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Structure of Tropical Convective Systems in Aqua-Planet Experiments: Radiative-Convective Equilibrium Versus the Earth-Like Experiment
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Structure of Tropical Convective Systems in Aqua-Planet Experiments: Radiative-Convective Equilibrium Versus the Earth-Like Experiment

机译：水行星实验中热带对流系统的结构：辐射对流平衡与类似地球的实验

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References(17) Supplementary materials(2) A previous study shows that tropical convective systems share a similar structure regardless of horizontal scale: lower-level horizontal convergence precedes maximum precipitation and this convergence rises and tilts over time. We conduct a series of aqua-planet experiments (APE) using the Non-hydrostatic Icosahedral Atmospheric Model (NICAM) to investigate whether this structure is maintained under different conditions with an Earth-like APE (CTL-exp) and a radiative convective equilibrium (RCE-exp) where sea surface temperature is uniform and no planetary rotation is applied. The experiments are conducted with the 56 km mesh size with explicit convective calculation without a cumulus parameterization scheme. CTL-exp shows a well-known multi-scale convective structure where a smaller convective system propagates westward along the equator whereas a larger convective system propagates eastward. In RCE-exp, the simulation also has a multi-scale structure but the larger-scale convective system no longer propagates in a preferred direction. The convective systems in CTL-exp have a similar tilting structure to tropical convective systems regardless of horizontal scale, while the larger scale convective system in RCE-exp show a smaller tilting structure. We speculate that the difference in CTL-exp and RCE-exp structures comes from the propagation speed of the convective systems.
机译：参考文献（17）补充材料（2）先前的研究表明，热带对流系统无论水平尺度如何都具有相似的结构：较低水平的水平会聚在最大降水之前发生，并且该会聚随时间升高和倾斜。我们使用非静水二十面体大气模型（NICAM）进行了一系列水行星实验（APE），以研究这种结构是否在与地球类似的APE（CTL-exp）和辐射对流平衡的不同条件下得以维持（ RCE-exp），其中海面温度均匀且不应用行星旋转。实验是在56 km网格尺寸下进行的，采用显式对流计算，没有累积参数化方案。 CTL-exp显示了众所周知的多尺度对流结构，其中较小的对流系统沿赤道向西传播，而较大的对流系统向东传播。在RCE-exp中，模拟也具有多尺度结构，但是较大尺度的对流系统不再沿首选方向传播。不管水平尺度如何，CTL-exp中的对流系统都具有与热带对流系统相似的倾斜结构，而RCE-exp中较大规模的对流系统则具有较小的倾斜结构。我们推测，CTL-exp和RCE-exp结构的差异来自对流系统的传播速度。

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