Assimilating temperature and salinity profiles using Ensemble Kalman Filter with an adaptive observation error and T-S constraint
Liu Danian; Shi Ping; Shu Yeqiang; Yao Jinglong; Wang Dongxiao; Sun Lu; Shu, YQ (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China.
2016
发表期刊ACTA OCEANOLOGICA SINICA
卷号35期号:1页码:30-37
摘要Temperature (T) and salinity (S) profiles from conductivity-temperature-depth data collected during the Northern South China Sea Open Cruise from August 16 to September 13, 2008 are assimilated using Ensemble Kalman Filter (EnKF). An adaptive observational error strategy is used to prevent filter from diverging. In the meantime, aiming at the limited improvement in some sites caused by the T and S biases in the model, a T-S constraint scheme is adopted to improve the assimilation performance, where T and S are separately updated at these locations. Validation is performed by comparing assimilated outputs with independent in situ data (satellite remote sensing sea level anomaly (SLA), the OSCAR velocity product and shipboard ADCP). The results show that the new EnKF assimilation scheme can significantly reduce the root mean square error (RMSE) of oceanic T and S compared with the control run and traditional EnKF. The system can also improve the simulation of circulations and SLA.
部门归属[Liu Danian; Shi Ping; Shu Yeqiang; Yao Jinglong; Wang Dongxiao] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Sun Lu] State Ocean Adm, South China Sea Branch, South China Sea Monitoring Ctr, Guangzhou 510301, Guangdong, Peoples R China ; LTO
关键词Ensemble Kalman Filter Adaptive Observation Error T-s Constraint
学科领域Oceanography
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15584
专题热带海洋环境国家重点实验室(LTO)
通讯作者Shu, YQ (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China.
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Liu Danian,Shi Ping,Shu Yeqiang,et al. Assimilating temperature and salinity profiles using Ensemble Kalman Filter with an adaptive observation error and T-S constraint[J]. ACTA OCEANOLOGICA SINICA,2016,35(1):30-37.
APA Liu Danian.,Shi Ping.,Shu Yeqiang.,Yao Jinglong.,Wang Dongxiao.,...&Shu, YQ .(2016).Assimilating temperature and salinity profiles using Ensemble Kalman Filter with an adaptive observation error and T-S constraint.ACTA OCEANOLOGICA SINICA,35(1),30-37.
MLA Liu Danian,et al."Assimilating temperature and salinity profiles using Ensemble Kalman Filter with an adaptive observation error and T-S constraint".ACTA OCEANOLOGICA SINICA 35.1(2016):30-37.
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