大西洋-欧洲环流型和东亚槽的客观化评定

从历史资料中得到５００ｈＰａ大西洋－欧洲环境流型Ｗ，Ｃ，Ｅ３个典型场，然后利用计算实况场与３个典型场之间欧氏距离的方法，以最小欧氏距离的原则，确定逐日环流型，在指定区域中，将纬圈上最小高度值的点，经过平滑处理后的平均经度值和高度值，确定东亚槽的位置和强度，这一工作将使环流物理量的评定更客观化及自动化。

The Objective Evaluation of the Atlantic-Europe Circulation Pattern and the East Asia Trough at 500hPa Level

The three model fields of Atlantic-Europe circulation pattern W,C or E at 500hPa are obtained from historical data,and W,C or E circulation pattern for any day can be determined according to the minimum of Euc-distance between the given field and the model fields. Additionally,the points that minimum height value is located at are found for all parallels in the given region and smooth mean longitude and mean height for those points can be regarded as the position and intensity of the East Asia trough. This work will make the evaluation of physical parameter of the general circulation more objective and automatic.