DU Meng-jiao,CHEN Quan-liang,LIN Ren-ping,et al.Argo Profile Data Assimilation in CAS-ESM-C:Benefits for Improving the Simulations of Upper Ocean Temperature[J].Journal of Chengdu University of Information Technology,2017,(03):289-296.[doi:10.16836/j.cnki.jcuit.2017.03.010 ]
同化Argo海洋廓线观测对CAS-ESM-C的 上层海洋温度模拟的改进
- Title:
- Argo Profile Data Assimilation in CAS-ESM-C:Benefits for Improving the Simulations of Upper Ocean Temperature
- 文章编号:
- 2096-1618(2017)03-0289-08
- 关键词:
- 海洋资料同化; Argo海洋廓线观测; 海洋温度模拟; CAS-ESM-C
- Keywords:
- ocean data assimilation; argo temperature and salinity profile; ocean temperature simulation
- 分类号:
- P456.7
- 文献标志码:
- A
- 摘要:
- 基于中国科学院地球系统模式气候分量系统(CAS-ESM-C)最新发展的海洋资料同化系统,分别同化Argo( array for real-time geostrophic oceanography,实时地转海洋学观测阵)海洋温盐廓线观测和SST(sea surface temperature,海表温度)观测资料,并与实际观测数据及模式自由积分结果对比,研究同化海洋廓线对海气耦合模式海温模拟的改进。分析结果表明,同化海洋廓线和SST观测均能减小模拟的SST偏差,有效改进热带太平洋暖池、冷舌结构的模拟。但对于海洋上层200～400 m温度而言,同化SST的改进效果微弱,同化海洋廓线观测能显著改进模式对其模拟的效果,使得同化后的1000 m深度以上海温的均方根误差(root mean square error,RMSE)平均减小至1 ℃,减小幅度超过60%; 同时对于热带太平洋上层海温的垂直分布及温跃层结构模拟改进显著,西太平洋暖池区200～400 m海温模拟偏差减小约6 ℃,减小幅度超过80%。
- Abstract:
- In this study, the Argo profile and observed sea surface temperature are assimilated into CAS-ESM-C using the newly developed ocean data assimilation system. The simulation of assimilation experiments are evaluated by comparing with the observations and model free integration. The results are the bias of SST in the assimilation experiments can be reduced compared to model free integration, and the simulation of warm pool and cold tongue structure in the tropical Pacific also be improved. For the simulation of upper ocean temperature in 200-400 m, the assimilation SST experiment have little improvement, but in the assimilation Argo profile experiment can be significantly improved, making the RMSE of the upper ocean(above 1000 m)temperature mean decrease to 1℃, reduced more than 60%. In the assimilation Argo profile experiment, the simulation of ocean temperature distribution and thermocline structure is improved obviously in the tropical Pacific, the deviation was reduced by nearly 6 ℃(more than 80%)in the 200-400 m of Western Pacific Warm Pool Area.
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备注/Memo
收稿日期:2017-03-01 基金项目:国家自然科学基金资助项目(41576019)