| 中尺度数值预报中不同初值方案的检验对比 |
| |
| 引用本文： | 张立祥,陈力强,周小珊,杨森.中尺度数值预报中不同初值方案的检验对比[J].气象,2001,27(7):8-12. |
| |
| 作者姓名： | 张立祥 陈力强 周小珊 杨森 |
| |
| 作者单位： | 沈阳区域气象中心, |
| |
| 摘 要： | 采用WMO推荐的标准化检验方法对两套初值方案进行检验，一套为使用T106L19全球中期模式预报场作为初猜场的cressman逐步订正客观分析方案（T106）；一套为直接插值客观分析方案（OBS）。通过对比分析发现：（1）反映大尺度环流场的要素，例如，300hPa风场、500hPa高度，T106初值方案略好于OBS。（2）空间尺度较小的要素，例如，850hPa温度、湿度等，OBS略优于T106；在比湿预报场中，低层预报优于高层，但850hPa比湿预报出现正的系统误差，随着预报时效的延长，正系统误差加大。（3）在风场的预报中，低层预报总体不如高层好，U风分量的预报有负的系统性误差，V风分量有正的系统性误差。同时对责任中初值预防的降水进行TS评分，评分结果表明，T106的总体评分高于OBS，但T106初值方案的空报率高于OBS，而OBS初值方案的漏报率高于T106。
|
| 关 键 词： | 标准化检验 数值预报 初值场 比湿预报 降水TS评分 环流场 |
Check-comparison of the Initial Schemes for the Mesoscale Numerical Prediction |
| |
| Zhang Lixiang,Chen Liqiang,Zhou Xiaoshan,Yang Sen.Check-comparison of the Initial Schemes for the Mesoscale Numerical Prediction[J].Meteorological Monthly,2001,27(7):8-12. |
| |
| Authors: | Zhang Lixiang Chen Liqiang Zhou Xiaoshan Yang Sen |
| |
| Abstract: | The initial fields and output of Mesoscale Numerical Prediction System in Northeast China were verified by means of WMO's standard verification method because there were some failures in the operational prediction There are two kinds of initial fields and output, one is that the initial fields were created by output of medium range forecast model (T106L19) used as initial first guess fields and were corrected by sounding data set, called T106 The other is of the objectively analyzing fields of sounding data set, called OBS The results of verification as the follows: (1) T106 is better than OBS in the elements that represents synoptic scale, such as 300hPa's wind and 500hPa's height (2) OBS is better in the elements that represents mesoscale, such as 850hPa's temperature and humidity The output at the low level are more precious than that at the high level (3) The predicted winds at the high level are better, but there are some prediction errors in U and V component field At one time, TS skill scores of precipitation were calculated for two kinds of output These results indicate that TS score of T106 is higher than OBS's in general, but there are more rain of prediction with T106 initial fields with OBS's initial fields than observation rains |
| |
| Keywords: | standardization compare of different initial field TS skill score of rain |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《气象》浏览原始摘要信息 |
| 点击此处可从《气象》下载免费的PDF全文 |
|
