摘要
针对大气环流形势,从天气系统的定义出发,面向气象业务MICAPS格点文件数据格式,在矢量旋转追踪法等值线分析的基础上,有序提取等值线的控制点。经过滤波、查找各等值线特性点、剔除异常点等处理,获取沙尘暴高空影响天气系统的基本节点。利用多种特征参量设计了方便可行的算法,完成了槽脊系统的数据构建、分析并确定其地理位置。通过对数据场数值结构分析,建立了确定闭合天气系统位置及其高、低性质的算法。使用Visual Basic语言,开发了相应的沙尘暴高空基本影响天气系统类别自动分析软件,为实现概念模型自动预报系统、提高沙尘暴业务预报现代化水平打下了基础。
Against the air circumstance status and based on the conception of weather system, this paper aimed to obtain the control point of contour with MICAPS grid format data and using contour pursuing method. A test was conducted on sandstorm weather system with curve filtering, checking singular points, eliminating abnormal points, etc. The trough and ridge system was developed by using a convenient and feasible algorithm with multi parameters. The location of closed system center was found by data structure analysis, and the high or low features of the system can be distinguished. An auto-analyzing software was setup in Visual Basic language to analysis the up air basic weather system for sandstorm. These should provide a basis for developing automatic forecast system of conceptual model, and consequently to improve the forecasting service for sandstorm.
出处
《中国沙漠》
CSCD
北大核心
2007年第4期633-638,共6页
Journal of Desert Research
基金
国家自然科学基金项目(40575048)
宁夏自然科学基金(NZ0646)共同资助
关键词
高空天气系统
自动分析
沙尘暴
weather system aloft
automatic analysis
sandstorm
