摘要
高山雷达站天线高度对雷达的垂直探测范围影响较大，加之中小尺度灾害性天气演生、发展的关键区域在高度1500～4500m左右，所以高山雷达站在选址时应考虑当地零度层平均高度和雷达的垂直探测范围。通过定量估测层状云降水的个例实践，发现探测高度会限制定量估测降水，探测高度对近距离降水估测影响较小，但对远距离降水估测影响较大，原因主要是雷达的垂直探测范围及当地零度层亮带高度的影响。故在高山雷达站选址中应考虑雷达的垂直探测范围及当地零度层亮带高度的影响，同时对已建设完成的高山天气雷达应考虑对高山雷达做0。仰角的观测可行性研究。
The theories and operational radar detection over Alpine areas show that the altitude of radar antenna has great effects on the vertical detection range. The meso- and micro-scale disastrous weather systems usually take place at the altitudes between 1500 and 4500 meters. A case study indicates that the accuracy of quantitative estimation of stratiform could precipitation, mainly in the areas far away from the radar site, was influenced by the vertical detection range and the altitude of the 0 ℃-layer bright band. As a result, the vertical detection range and the altitude of the 0 ℃ -layer bright band should be considered while selecting radar sites in the Alpine area. An investigation is also made on the feasibility study of radar zero-degree elevation scanning in the Alpine aress.
出处
《气象科技》
2006年第3期340-343,i0003-i0004,共6页
Meteorological Science and Technology
基金
云南省气象局"云南省面雨量预报系统建设"项目和"自动站保障体系技术研究"课题共同资助
关键词
雷达
高山地区
定量降水测量
选址
radar, Alpine area, quantitative precipitation measurement, site selection
