Error and Energy Budget Analysis of a Nonhydrostatic Stretched-Grid Global Atmospheric Model
Error and Energy Budget Analysis of a Nonhydrostatic Stretched-Grid Global Atmospheric Model
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DOI：
10.1175/mwr-d-15-0271.1
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发表时间：
2015-12
影响因子：
3.2
通讯作者：
J. Uchida;M. Mori;H. Nakamura;M. Satoh;Kentaroh Suzuki;T. Nakajima
中科院分区：
文献类型：
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作者：
J. Uchida;M. Mori;H. Nakamura;M. Satoh;Kentaroh Suzuki;T. Nakajima
摘要采用非静力拉伸网格（SG）模型分析了水平网格拉伸产生的大尺度误差及其对目标区域的影响。在2011年3月、4月和5月使用不同分辨率和拉伸因子，采用完全可压缩、非流体静力的全球大气模式——非流体静力二十面体大气模式（NICAM）及其SG区域模式——拉伸-NICAM进行了模拟。热带降雨测量任务（TRMM）卫星数据与准均匀和SG模拟的周累积降水量比较表明，拉伸运行更好地代表了风暴和相关降水，因为在网格间距较粗的外围区域产生的误差对以焦点为中心的内部区域没有显著影响。在整个赛季的模拟中，在一组特定的拉伸运行中，焦点位于美国东部，人工…
AbstractA nonhydrostatic stretched-grid (SG) model is used to analyze the large-scale errors generated by stretching horizontal grids and their influence on a region of interest. Simulations by a fully compressible, nonhydrostatic global atmospheric model, the Nonhydrostatic Icosahedral Atmospheric Model (NICAM), and its SG regional model, stretched-NICAM, were performed for the months of March, April, and May of 2011 using various resolutions and stretching factors. A comparison of week-long accumulative precipitation amounts between the Tropical Rainfall Measuring Mission (TRMM) satellite data and the quasi-uniform and SG simulations showed that a stretched run better represents storms and associated precipitation because the errors generated in the outer regions with coarser grid spacing do not significantly affect the inner domain centered at the focal point. For season-long simulations, in one particular set of stretched runs with the focal point located in the eastern United States, the artificial s...