Stochastic Dynamics of Sea Surface Height Variability

摘要: Sea surface height anomalies measured by the Ocean Topography Experiment (TOPEX)/Poseidon satellite altimeter indicate high values of skewness and kurtosis. Except in a few regions, including Gulf Stream, Kuroshio Extension, Agulhas Retroflection, that display bimodal patterns sea variability, kurtosis is uniformly greater than 1.5 times squared minus an adjustment constant. This relationship differs substantially from what standard Gaussian or double-exponential noise would produce. However, it can be explained simple theory which assumed to multiplicative, meaning larger background state implies random elements. The existence multiplicative anticipated equations motion, if ocean dynamics are split into slowly decorrelating deterministic component rapidly contribution approximated as noise. Such model raises possibility predicting probabilities extreme first physical principles may provide useful null hypothesis for non-Gaussian variability.