南沙海区温度细结构正态性检验

On the Gaussianity Test of Temperature Finestructure in a Region Surrounding the Nansha Islands

对南沙海区观测得的部分温度脉动一深度序列作了正态检验。检验时先用根据序列的自回归模型构成的滤波器滤去序列元素间之相关性产生白噪声序列 ,而后用 χ2一拟合优度检验法对此白噪声序列作正态性独立同分布检验并对偏度与峰度作了检验。检验结果表明 ,除少数样本近似正态分布外 ,大多数样本的分布为非正态的 。

The Gaussianity test is studied for pretreated and detrended CTD temperature depth series. Firstly, the correlation between the elements of the series is filtered by passing through a filter based on an autoregressive model best fitting the series, to yield a white noise series. Then the Gaussianity of the white noise series is tested using Chi square goodness of fit test and skewness and kurtosis test. The test results show that the sample distributions do not accord with Gaussianity distribution with a few exceptions. This is the effect of irreversible finestructure with scales smaller than those of internal waves.