Bispectra of Sea-Surface Temperature Anomalies
Bispectra of Sea-Surface Temperature Anomalies
复制标题
海面温度异常双谱
DOI：
10.1175/1520-0485(1987)017
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
D. Mueller
中科院分区：
文献类型：
--
作者：
D. Mueller
摘要海表温度（SST）观测异常具有显著的三重相关和双谱特征。这种类型的特征不包括在标准的奥恩斯坦-乌伦贝克（Ornstein Uhlenbeck）SST波动概念中。本文导出了一个简单的非高斯马尔可夫过程的谱和双谱。通过逆建模技术可以表明，该过程对SST异常数据的谱和双谱的真实的部分产生了令人满意的近似。此外，分析表明，双谱的虚部不能用单变量模型来表示。
Abstract Observed anomalies of sea-surface temperatures (SST) exhibit significant triple-correlations and bispectra. Features of this type are not covered by the standard Ornstein Uhlenbeck (OU) concept of SST fluctuations. The present paper derives the spectrum and the bispectrum for a simple non-Gaussian Markov process. It can be shown by means of the inverse modeling technique that this process yields a satisfactory approximation to the spectra and the real part of the bispectra of SST-anomaly data. Moreover, the analysis indicates that the imaginary part of the bispectrum cannot be represented in terms of a single-variable model.