黄超,彭新东,李晓涵. 2018. 阴阳网格上通量型非静力模式动力框架的理想试验[J]. 气象学报, (0):-, doi:10.11676/qxxb2018.047
阴阳网格上通量型非静力模式动力框架的理想试验
HUANG Chao PENG Xindong LI Xiaohan
投稿时间:2018-01-22  修订日期:2018-05-17
DOI:10.11676/qxxb2018.047
中文关键词:  阴阳网格,非静力,动力框架,守恒,通量型
英文关键词:Yin-Yang  grid, Non-hydrostatic,Dynamic  core, Conservation, Flux
基金项目:(41575103和91637210)资助
作者单位E-mail
黄超 中国气象科学研究院灾害天气国家重点实验室 lintiancheng8@hotmail.com 
彭新东 中国气象科学研究院灾害天气国家重点实验室 pengxd@cma.gov.cn 
李晓涵 中国气象科学研究院灾害天气国家重点实验室 marinexh@126.com 
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中文摘要:
      为改善球面经纬度网格在高分辨率应用的苛刻限制,提高全球大气动力模式的时间积分效率,论文选取以阴阳网格为基础构建通量型非静力大气模式动力框架,采用有限体积法和通量型平流显式算法积分方案,保证模式的守恒计算性能。该动力框架在标准三维大气理想试验中进行了中期积分试验,对动力框架的计算效果、性能进行检验。在三维平衡流试验,Rossby-Haurwitz波试验和山脉Rossby波试验中都表现出很好的稳定性和三维计算效果,其中水平2.5°分辨率模式的平衡流垂直速度误差为10-5量级,而经向速度误差在10-2量级,Rossby-Haurwitz波保持基本波形稳定传播,而地形Rossby波试验则给出背风坡激发低槽在发展过程中不断向下游和南半球传播。
英文摘要:
      The conservative dynamic core on quasi-uniform grid is essential for global high-resolution numerical weather prediction and long-term climate projection. In this article, a flux-form non-hydrostatic dynamic core is developed on the Yin-Yang grid to improve the limitation of time step and computational efficiency of model. In order to ensure mass conservation, explicit flux-form transport scheme and a finite volume method is adopted. A series of idealized three-dimensional experiments are carried out to test the effect of the new frame. The numerical results reveal strong stability and good accuracy. The error of vertical velocity shows an order about and which of the meridional velocity about in the balanced flow test with a horizontal resolution of 2.65°. Despite the low resolution of the model, the propagation of the Rossby-Haurwitz wave is stably simulated well without deformation. The mountain-Rossby wave experiment shows that the trough initiated at the lee side of the mountain developed downstream, and propagated to the southern hemisphere.
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