黄河三角洲地区冰雹分析及其短时预报

ANALYSIS AND SHORT TERM FORECAST OF HAILIN THE DELTA REGION OF THE YELLOW RIVER

介绍了冰雹的气候特征， 利用黄河三角洲地区１９８８～１９９７ 年的 ７１１ 雷达回波、降雹资料及有关的高空探测资料， 对冰雹云的雷达回波参数和环境场要素进行了统计分析。结果表明：降雹与雷达回波顶温度、回波强度、０～－ ２０℃之间云体的厚度、７００ ｈ Ｐａ 上的比湿及云体的冷暖厚度之比等参数有关。在此基础上， 建立了冰雹的短时预报方程，

Climatic feature of hail is introduced., Using the data of 711 radar echoes , rawinsonde and hail shooting observations from 1988 to 1997 in delta region of the Yellow River, the radar echo parameters and ambient field elements of hailcloud are analyzed statistically. The results show that hailcloud is related to echo top temperature, echo strength, the depth of cold cloud with temperature from 0 0C to -200C, 700 hpa specific humidity and the ratio of cold cloud depth to the warm as well. Based on these factors, the short term forecast equation is established and the concise criteria for hail suppression are provided.