| 1 | Application of altimetry data assimilation on mesoscale eddies simulation显示文摘Mesoscale eddy plays an important role in the ocean circulation. In order to improve the simulation accuracy of the mesoscale eddies, a three-dimensional variation (3DVAR) data assimilation system called Ocean Variational Analysis System (OVALS) is coupled with a POM model to simulate the mesoscale eddies in the Northwest Pacific Ocean. In this system, the sea surface height anomaly (SSHA) data by satellite altimeters are assimilated and translated into pseudo temperature and salinity (T-S) profile data. Then, these profile data are taken as observation data to be assimilated again and produce the three-dimensional analysis T-S field. According to the characteristics of mesoscale eddy, the most appropriate assimilation parameters are set up and testified in this system. A ten years mesoscale eddies simulation and comparison experiment is made, which includes two schemes: assimilation and non-assimilation. The results of comparison between two schemes and the observation show that the simulation accuracy of the assimilation scheme is much better than that of non-assimilation, which verified that the altimetry data assimilation method can improve the simulation accuracy of the mesoscale dramatically and indicates that it is possible to use this system on the forecast of mesoscale eddies in the future. | GAO Shan WANG Fan LI MingKui CHEN YongLi YAN ChangXiang ZHU Jiang | 2008 | Science China Earth Sciences2008，51，1： | 10 |
| 2 | 中尺度涡的高度计资料同化模拟显示文摘中尺度涡在大洋环流中有着重要的作用.为检验高度计资料同化应用于中尺度涡模拟的效果,提高环流模式对中尺度涡模拟的精度,使用三维变分的OVALS同化系统结合POM模式进行了中尺度涡同化模拟实验.该系统将卫星高度计资料同化反演成为温盐伪观测数据,然后再次进行常规温盐同化,得到温盐分析场.根据中尺度涡现象的物理特性,经过对比检验,对系统中的同化参数作了合理设置.使用T/P和ERS1/2的10a卫星高度计的海表高度异常资料,分别用同化与非同化两种方案对西北太平洋的中尺度涡进行对比模拟实验.将实验结果与观测数据的比较表明,加入高度计资料同化的模拟结果远远好于未使用同化的模拟结果.说明高度计反演温盐场的同化方法用于对于模拟中尺度涡现象是非常有效的. | 高山 王凡 李明悝 陈永利 闫长香 朱江 | 2007 | 中国科学(D辑)2007，37，12： | 9 |
您所在的机构暂未开通此部分的功能，请联系管理员