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首页> 外文期刊>SOLA: Scientific Online Letters on the Atmosphere >Eastward-Propagating Property of Large-Scale Precipitation Systems Simulated in the Coarse-Resolution NICAM and an Explanation of its Appearance
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Eastward-Propagating Property of Large-Scale Precipitation Systems Simulated in the Coarse-Resolution NICAM and an Explanation of its Appearance

机译：粗分辨率NICAM模拟的大型降水系统的向东传播性质及其解释

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References(15) Cited-By(5) Supplementary materials(1) Using the Non-hydrostatic ICosahedral Atmospheric Model (NICAM) on an aqua-planet with a uniform longitudinal sea surface temperature, precipitation systems (PSs) with coarse horizontal resolutions are studied. An eastward-propagating (EP) property of the PSs is seen even though the horizontal resolution becomes coarser to 112 km, as long as the vertical stratification is kept conditionally unstable. The appearance or disappearance of the EP property is explained in comparison with mesoscale (100 km) and large-scale (1,000 km) PSs, a non-precipitation system (NPS), and a system simulated by a dry model with positive-only wave CISK heating (DP). By assuming that the height and the updraft intensity of convection are common in these systems, the turnover times of representative convections are estimated. Compared with the time scale of the equatorial beta (Tβ), where its effect essentially works and the distinct EP property appears, the turnover times of the large-scale PS and DP are longer than Tβ, producing the EP property, whereas those of the NPS and mesoscale PSs are shorter, inducing no EP property. These results are consistent with observations and model outputs (Nakazawa 1988; Nasuno et al. 2007, 2008).
机译：参考文献（15）被引用的文献（5）补充材料（1）在具有均匀纵向海表温度的水上行星上使用非静力二十面体大气模型（NICAM），研究了具有较粗水平分辨率的降水系统（PSs） 。只要水平分层保持有条件的不稳定，即使水平分辨率变粗到112 km，也可以看到PS的向东传播（EP）特性。与中尺度（100 km）和大尺度（1,000 km）PS，非降水系统（NPS）以及由仅具有正向波​​的干模型模拟的系统相比较，解释了EP属性的出现或消失。 CISK加热（DP）。通过假设对流的高度和上升气流强度在这些系统中很常见，可以估算代表性对流的周转时间。与赤道贝塔（Tβ）的时标相比，赤道贝塔（Tβ）的效果基本上起作用并且具有独特的EP特性，大型PS和DP的周转时间比Tβ长，从而产生EP特性，而赤道贝塔（Tβ）的周转时间更长。 NPS和中尺度PS较短，不产生EP特性。这些结果与观测值和模型输出一致（Nakazawa 1988; Nasuno等人2007，2008）。

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