Data Assimilation for Ocean-Acoustic Coupled Model

Through embedding acoustic calculations into the dynamic ocean and achieving an ocean-acoustic coupled numerical model, a dynamic forecast and assessment of the acoustic environment are established in this study. Incorporating data assimilation from meteorologic and oceanic forecast into the acoustic environment study to providing initial value for the Ocean-Acoustic coupled model, the calculation efficiency and forecasting precision are improved significantly. Meanwhile, We illustrated the prediction errors of the sound velocity section as well as the 90% probability interval of the transmission losses, the uncertainty histograms of the sound velocity, and the transmission losses. The experimental results reflected the influence of marine temporal and spatial variations on the uncertainties of the underwater acoustic environment and quantified uncertainties of the underwater acoustic environment. What’s more, the results also indicate that the method used in this study could delineate and quantify the uncertainties of the underwater acoustic environment caused by marine dynamic changes.