用欧氏距离系数预报舟山海域赤潮发生指数等级

Forecasting red tide occurring level by use of Euclidean distance in Zhoushan sea area

通过选取1996～2007年72个赤潮发生个例为一组样本，另外选取2004年4～9月之间前后3d之内都没有赤潮发生的92个个例为另一组样本，对赤潮发生前3d的气压、温度、相对湿度、风速、风向、降水、日照、云量等要素及某些要素3d的累积值、以及增温的天数、降压的天数等共30个物理量做t统计量分析，并应用欧氏距离系数进行聚类，依此来判别赤潮发生的可能性。在对2008年舟山12次赤潮进行试报中，结果令人满意。

By choosing the year 1996 -2007 there is red tide occurred in the course of 72 samples for one group,while in 2004 April- September to select between the three days before and after the occurrence of red tide are not the course of the 92 samples for the other group, the first three days of the occurrence of red tide of pressure, temperature, relative humidity, wind speed, wind direction, precipitation, sunshine, cloud cover and other elements and certain elements of the three-day cumulative value, as well as the number of days of warming, such as step-down the number of days a total of 30 physical capacity to make t-statistic analyze altogether, and application of Euclidean distance clustering coefficients, and so to determine the possibility of the occurrence of red tide. At the 2008 red tide zhoushan 12 times reported in the test with satisfactory results.