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阴阳网格上通量型非静力模式动力框架的理想试验
引用本文:黄超,彭新东,李晓涵.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,2019,77(1):154-164.
作者姓名:黄超  彭新东  李晓涵
作者单位:中国气象科学研究院灾害天气国家重点实验室, 北京, 100081
基金项目:国家自然科学基金项目(41575103、91637210)。
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,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,罗斯贝-豪威茨波试验和山脉罗斯贝波试验中均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,罗斯贝-豪威茨波保持基本波形稳定传播,而地形罗斯贝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。 

关 键 词:阴阳网格    非静力    动力框架    守恒    通量型
收稿时间:2018/2/26 0:00:00
修稿时间:2018/6/12 0:00:00

Idealized experiments of a flux-form non-hydrostatic dynamic core on the Yin-Yang grid
HUANG Chao,PENG Xindong and LI Xiaohan.Idealized experiments of a flux-form non-hydrostatic dynamic core on the Yin-Yang grid[J].Acta Meteorologica Sinica,2019,77(1):154-164.
Authors:HUANG Chao  PENG Xindong and LI Xiaohan
Institution:State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China
Abstract:A flux-form non-hydrostatic dynamic core is developed on the Yin-Yang grid to overcome the limitation of time step and improve the computational efficiency of the model. In order to ensure mass conservation, an explicit flux-form transport scheme and a finite volume method are adopted. A series of idealized three-dimensional experiments with a horizontal resolution of 2.5° are carried out to test the effect of the new frame. The numerical results reveal strong stability and high accuracy. The error of vertical velocity shows an order of about 10-5 and that of the meridional velocity is about 10-2 in the balanced flow test. The propagation of the Rossby-Haurwitz wave is well simulated and remains stable without deformation. The Mountain-Rossby wave experiment shows that the trough initiated at the lee side of the mountain develops downstream and propagates to the southern hemisphere.
Keywords:Yin-Yang grid  Non-hydrostatic  Dynamic core  Conservation  Flux
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