CAJ | 학술논문

如何从新一代天气雷达三维拼图数据中提取用于降水估测的回波强度是提高雷达降水估测的关键，为了分析利用三维拼图数据提取出的混合扫描回波强度的质量以及对降水估测的影响，文章利用浙江省雷达和全国自动站数据，通过研究回波强度与地面雨量的关系，分析了影响基于雷达三维拼图的降水估测精度的几个要素。通过累积整个过程雷达回波强度估测的雨量和自动站采集雨量得到浙江及周边地区的比率分布，找到了两者关系的异常区：区域性回波强度比较高的区域；区域性回波强度的低估区；区域性回波强度随地形变化的区域；区域性回波强度估测较为合理的区域；随纬度增加回波强度逐渐高估的区域。通过分析发现：0℃层亮带、残余的地物回波、异常的回波强度垂直廓线、自动站的数据质量等是造成回波强度与地面雨量关系异常的原因。最后，利用部分自动站对雷达估测的降水进行订正，结果表明：自动站订正能一定程度缓解上述区域高估或低估程度。
여하종신일대천기뢰체삼유병도수거중제취용우강수고측적회파강도시제고뢰체강수고측적관건，위료분석이용삼유병도수거제취출적혼합소묘회파강도적질량이급대강수고측적영향，문장이용절강성뢰체화전국자동참수거，통과연구회파강도여지면우량적관계，분석료영향기우뢰체삼유병도적강수고측정도적궤개요소。통과루적정개과정뢰체회파강도고측적우량화자동참채집우량득도절강급주변지구적비솔분포，조도료량자관계적이상구：구역성회파강도비교고적구역；구역성회파강도적저고구；구역성회파강도수지형변화적구역；구역성회파강도고측교위합리적구역；수위도증가회파강도축점고고적구역。통과분석발현：0℃층량대、잔여적지물회파、이상적회파강도수직곽선、자동참적수거질량등시조성회파강도여지면우량관계이상적원인。최후，이용부분자동참대뢰체고측적강수진행정정，결과표명：자동참정정능일정정도완해상술구역고고혹저고정도。
How to extract the echo intensity used for quantitative precipitation estimation (QPE)from the 3-D mosaic data of China New Generation Weather Radar (CINRAD)is the key to improve the radar rain-fall estimation.With the purpose of analyzing hybrid echo-intensity quality extracted from the 3-D mosaic data and the influence on the precipitation estimation,by using the radar data of Zhejiang Province and na-tionwide rainfall station data,this paper studies the relationship between the echo intensity and the suface precipitation amount and analyzes several factors that affect the accuracy of precipitation estimation.Ac-cording to the ratio distribution,which is got by the whole weather process accumulation of precipitation estimation from the radar echo intensity and the collected rainfall from the automatic rainfall stations in Zhejiang Province and the surrounding areas,several abnormal regions are found including the region where regional echo intensity is relatively high,the region where regional echo intensity is underestimated, the region where regional echo intensity varies with topography,the region where regional echo intensity is estimated to be relatively reasonable and the region where regional echo intensity is gradually overestima-ted with increasing latitude.The analysis results show that the 0℃ bright band,the residual ground echo, the abnormal radar echo intensity vertical profile,the quality of the rainfall station data,etc.are causes for the abnormal relationship between echo intensity and ground precipitation amount.Finally,by using parts of the rainfall station data,the precipitation estimation from the radar is corrected and the results show that the rainfall station correction can alleviate the degree of the regional overestimation or underesti-mation to some extent.