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对多普勒雷达集合交叉相关外推技术的构造与实例检验

ISSN号：1000-0526
期刊名称：《气象》
时间：0
分类：O4-4[理学—物理] P433.2[天文地球—大气科学及气象学]
作者机构：[1]China Meteorological Administration Training Centre, Beijing 100081, China, [2]Institute of Atmospheric Physics, Chinese Academy of sciences, Beijing 100029, China
相关基金：This research was supported by the National Basic Research Program of China （No. 2012CB957804） and the National Natural Science Foundation of China （Grant Nos. 41275109, 41075078 and 41175051）.

关键词：斜压不稳定, 物理模型, 高能量, 理想, 保育, 控制模型, 能量转换率, 生命周期, energy conversion, energy cascade, ideal baroclinic instability, high order total energy conservation, time-split scheme

中文摘要：

在一个理想的 baroclinic 不稳定性盒子的生命周期改进 energetics，我们开发一个物理保存忠实模型(F 模型) ，并且我们从 F 模型把模拟比作那些传统全球光谱半含蓄的模型(控制模型) 。的结果光谱动能和它的预算在二个模型在更小的规模显示不同表演。双向精力流动在 Fmodel 出现在产生和 baroclinic 骚乱的快速的生长舞台。然而，仅仅下阶层的机制在控制模型统治。在 F 模型，中央 -- 并且更小的规模开始是充满力量的，然后活跃高级非线性的串联发生。因此，在优先的规模的骚乱被下阶层、高级的精力串联并且由变换从势能强迫。旋涡动能预算的分析也在 F 模型显示出精力变换率的显著改进。作为结果，理想的 baroclinic 波浪的特征极大地在 F 模型被改进，以形成的紧张和时间[出版摘要]

英文摘要：

To improve the energetics in the life cycle of an ideal baroclinic instability case, we develop a Physical Conserving Fidelity model （F-model）, and we compare the simulations from the F-model to those of the traditional global spectral semi-implicit model （control model）. The results for spectral kinetic energy and its budget indicate different performances at smaller scales in the two models. A two-way energy flow emerges in the generation and rapid growth stage of the baroclinic disturbance in the F-model. However, only a downscale mechanism dominates in the control model. In the F-model, the meso- and smaller scales are energized initially, and then an active upscale nonlinear cascade occurs. Thus, disturbances at prior scales are forced by both downscale and upscale energy cascades and by conversion from potential energy. An analysis of the eddy kinetic energy budget also shows remarkable enhancement of the energy conversion rate in the F-model. As a result, characteristics of the ideal baroclinic wave are greatly improved in the F-model, in terms of both intensity and time of formation.

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