标题： 实时将高频雷达流纳入沿海海洋模型 显示英文标题

标题： Real time assimilation of HF radar currents into a coastal ocean model

摘要： 一个用于沿海洋流的实时同化和预报系统被提出。 该系统的目的在于基于高频雷达表层洋流测量数据的同化，提供洋流分析和预报。 当地船舶交通服务监控挪威海岸的两个石油码头的船舶交通，并实时接收分析和预报。 提出了一种基于最优插值的新同化方法，其中使用从海洋模型中得出的空间协方差代替简化的数学公式。 一组高频雷达天线提供洋流测量数据。 一套嵌套的海洋模型构成了模型系统。 观测系统被发现能产生良好的分析结果和短时预报，与没有同化的模型双胞胎相比有显著改进。 该系统速度快；在获取雷达测量数据后45分钟内，船舶交通服务即可获得分析结果和六小时预报。 显示英文摘要

摘要： A real time assimilation and forecasting system for coastal currents is presented. The purpose of the system is to deliver current analyses and forecasts based on assimilation of high frequency radar surface current measurements. The local Vessel Traffic Service monitoring the ship traffic to two oil terminals on the coast of Norway received the analyses and forecasts in real time. A new assimilation method based on optimal interpolation is presented where spatial covariances derived from an ocean model are used instead of simplified mathematical formulations. An array of high frequency radar antennae provide the current measurements. A suite of nested ocean models comprise the model system. The observing system is found to yield good analyses and short range forecasts that are significantly improved compared to a model twin without assimilation. The system is fast; analysis and six hour forecasts are ready at the Vessel Traffic Service 45 minutes after acquisition of radar measurements.