强对流天气的临近预报极具挑战性。随着天气雷达的发展,其高时空分辨率的优势使其迅速应用于短时临近预报研究中。利用雷达回波数据计算其在相邻时次内最优空间相关,得到不同时次的移动矢量序列；在此基础上,叠加前一时次雷达回波变化量,完成雷达回波形状和量的外推。采用SCE-UA算法对雷达回波强度与降雨强度的关系式进行参数估算,从而达到预报降雨的目的。结果表明,利用雷达回波最优空间相关方法的预报图像与实况较为接近,方法具有较强的可操作性和较高的实用价值；利用SCE-UA算法的预测降雨强度,与雨量站实测雨强进行误差分析,均方根误差 ,相较于利用经验参数进行的降雨预报精度明显提高。
Abstract
The nowcasting of severe convective weather is very challenging． With the development of weather radar,the advantage of its high temporal and spatial resolution has been used in the research on nowcasting． By using echo data of radar to get the optimal spatial correlation of the contiguous time,the moving vector sequence at different times． Based on that,linear objective forecasting is made to radar echo． SCE -UA is used to make the estimation of parameters of the relation between radar echo intensity and rainfall intensity to achieve the goal of rainfall forecasting． The results show that,the forecasting image by using radar echo optimal spatial correlation method is similar to the real image,which means that this method has a highly practical value． By using SCE-UA method to forecast the rainfall intensity of the next 60 minutes,and comparing the observe rainfall intensity,then an error analysis is made,it shows that,the forecast accuracy by using experienced parameters is higher than using Kalman filter method．
关键词
雷达回波 /
临近预报 /
强对流 /
天气雷达 /
复合形交叉进化算法
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基金
浙江省水利厅科技项目( ＲA1702) ; 宁波市水利科技项
目( NSK201715) ; 中国博士后科学基金( 2017M621612)
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参考文献
[ ] 陈垚森,陈洋波,周浩澜,徐会军.多普勒天气雷达资料在城市内涝预警的应用[J].中国农村水利水电,2012(08):74-78.
[ ] Austin G L, Bellon A. The Use of Digital Weather Radar Records for Short-term Precipitation System(LAPS): Analysis of Clouds, Precipitation, and Temperature. Weather and Forecasting, 11, 273-287.
[ ] Rinehart R,E,Garvey E T. Three-dimensional Storm Motion Detection by Conventional Weather Radar. Nature,1978,273:287-289.
[ ] Li L , S chmid W , Joss J. Now Casting of Motion and Growth of Precipitation with Radar over A Complex Orography. J Appl Meteor , 1995 , 34 :1286-1300.
[ ] 陈明轩,王迎春,俞小鼎.交叉相关外推算法的改进及其在对流临近预报中的应用[J].应用气象学报,2007(05):690-701.
[ ] Duan Q Y, Gupta V K, Sorooshian S. Shuffled Complex Evolution Approach for Effective and efficient global minimization[J]. Journal of Optimization Theory and Applications, 1963,76(3) : 501-521.
[ ] Duan Q Y, Sorooshian S, Gupta V K. Optimal Use of the SCE-UA Global Optimization Method for Calibrating Watershed Models[J]. Journal of Hydrology, 1994, 158(3-4): 265-284.
[ ] 李致家,孔凡哲,王栋等. 现代水文模拟与预报技术[M]. 南京：河海大学出版社,2010.
[ ] 宋星原,舒全英,王海波等. SCE-UA、遗传算法和单纯形优化算法的应用[J]. 武汉大学学报（工学版）,2009,42(1):6-9.
[ ] Lemon L R. New Servere Thunderstorm Radar Identification Techniques and Warning Criteria: A Preliminary Report. NOAA Tech Memo, NWS-NSSFC 1, 60pp.[NTIS No.PB-273049] .
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