摘要
误差是变分同化过程中不可避免的话题,背景场误差和观测场误差又是整个同化过程误差的主要部分。论文通过简单地对变分同化基本原理、背景误差协方差矩阵以及观测误差协方差矩阵建模之后,通过数值模拟实验,分析了背景误差系数和观测误差系数变化给同化带来的影响,结果表明,无论哪种误差系数,系数越大,同化质量越低,波动越大,但是并不影响整个同化过程对的收敛性。
Error is an inevitable topic in the process of variational assimilation. Background field error and observation field error are the main parts of the errors in the whole assimilation process of variational assimilation by simple basic principle,the background error covariance matrix and the observation error covariance matrix,through experiment and numerical simulation analysis of the background error coefficient and observation error coefficient change on the effects of assimilation,the results show that no matter what kind of error coefficient,the greater the coefficient,the lower the quality of assimilation,the greater the volatility,but does not affect the assimilation process of convergence.
作者
蒋金利
诸雪征
顾进
韩朝帅
马岩
李广峰
JIANG Jinli;ZHU Xuezheng;GU Jin;HAN Chaoshuai;MA Yan;LI Guangfeng(Institute of Chemical Defense,Beijing 102205;Research Institute of Chemical Defense,Beijing 102205;The Second Mobile Detachment of Sichuan Armed Police Corps,Kangding 626000)
出处
《计算机与数字工程》
2022年第9期1899-1906,共8页
Computer & Digital Engineering
关键词
误差系数
变分同化
数值模拟
error coefficient
variational assimilation
numerical simulation
