Estimating the 4DVAR analysis error of GODAE products
Estimating the 4DVAR analysis error of GODAE products
复制标题
估算GODAE产品的4DVAR分析误差
DOI：
10.1007/s10236-008-0172-3
复制
发表时间：
2009
期刊：
影响因子：
2.3
通讯作者：
A. Moore
中科院分区：
文献类型：
--
作者：
B. Powell;A. Moore
我们探索通过同化全球海洋数据同化实验（GODAE）提供的观测产品和美洲内海增量四维变分数据同化系统中的其他来源获得的海洋环流估计。分析误差的估计（正式地，逆 Hessian 矩阵）是在同化过程中计算的。比较不同海面高度和海面温度产品对最终分析误差和模型状态估计之间差异的影响，我们发现同化 GODAE 和非 GODAE 产品会产生模型和观测之间的差异，这些差异与观测产品本身之间的差异相当。虽然所得的分析误差估计取决于同化系统的配置，但海洋环流估计标准偏差的基本空间结构相当稳健，并表明当仅同化表面数据时，同化程序能够减少环流不确定性。
We explore the ocean circulation estimates obtained by assimilating observational products made available by the Global Ocean Data Assimilation Experiment (GODAE) and other sources in an incremental, four-dimensional variational data assimilation system for the Intra-Americas Sea. Estimates of the analysis error (formally, the inverse Hessian matrix) are computed during the assimilation procedure. Comparing the impact of differing sea surface height and sea surface temperature products on both the final analysis error and difference between the model state estimates, we find that assimilating GODAE and non-GODAE products yields differences between the model and observations that are comparable to the differences between the observation products themselves. While the resulting analysis error estimates depend on the configuration of the assimilation system, the basic spatial structures of the standard deviations of the ocean circulation estimates are fairly robust and reveal that the assimilation procedure is capable of reducing the circulation uncertainty when only surface data are assimilated.
影响因子：
8
作者：
Donlon, C.;Robinson, I.;Rayner, N.
通讯作者：
Rayner, N.