基于多源资料的海洋三维流场估算技术研究

At present time, the researches of 3-D ocean currents require for a mass of computers working hours. So they can't put to effect on the medium and minitype naval ships (especially: the submarines).On the other hand, the submartine cannot obtain the real time data of the ocean environment. To deal with these problems, we plan to study a new estimating technique of 3-D ocean currents. This method will synthetically use the output data of satellites(include the sea surface temperature data retrieved by satellite data, the sea surface height data retrieved by the altimeter,the sea surface wind speed retrieved by the QuikSCAT scatterometer), the data of Argos, the observation on the spot, and some other multi-source data. Then, it will use different routes to retrieval the ocean currents, such as using the output data of satellites to retrieve the ocean surface currents, using the ARGO data to determine the ocean sublayers currents by P-vector method, and merging the data of the ocean currents calculated by ARGOS data and observated on the spot. And then， on the one hand, it will use the Blended analysis method and the optimum interpolation method to merge above data directly. On the other hand, it will use a nonlinearity modeling method to reconstruct the 3-D ocean currents. In the end, it will do process to verify and campare the results, and to analyse the errors. We hope this method can give contributiveness to the ocean currents forecast and support technology.

针对中小型舰艇（尤其是潜艇）所具备的计算条件及其所能获取的海洋环境资料条件，利用卫星海面温度产品资料及卫星高度计、散射计资料产品分别反演大洋海表面流场，再基于Argo剖面浮标资料的三维温盐场重构结果，通过动力学方法推算海洋中上层流场，然后一方面采用"泊松方程"融合技术和最优插值技术将数据直接融合得到三维分层流场；另一方面，将多源资料反演、推算得到的流场作为输入，以Argos计算得到的海流及实测海流为目标，采用非线性建模方法，建立三维分层海流融合订正模型，得到融合订正的海洋三维分层流场，并进行检验、比较与误差分析，为中小型舰艇的海洋三维流场保障提供新的思路，为海洋环境保障提供技术支持。

项目利用卫星高度计、散射计资料产品分别反演大洋海表面流场，再基于Argo剖面浮标资料的三维温盐场重构结果，通过动力学方法推算海洋中上层流场，融合得到海洋三维分层流场，并进行检验与误差分析。具体有：对Argo数据进行了质量控制，对数据存在的盐度偏移、错误剖面、毛刺等现象进行了订正；使用订正的资料开展了散乱数据网格化。采用Argo网格化温盐数据，利用P矢量方法计算得到了全球表层以下各标准层流场，并与表层流场共同构建了全球大洋的三维流场。基于卫星遥感的海面高度数据(SSH)和海面风场数据(CCMP)，利用改进的Lagerloef计算大洋表层流场的方法，反演得到了全球1/2°×1/2°的海表流场产品，并与TAO、SCUD等流场数据进行比较，证明反演得到的流场是可靠、实用的。该研究可为军事海洋环境保障提供技术支持。