| ZHANG Min,ZHOU Lei,FU Hongli,JIANG Lianghong,ZHANG Xiangming. 2016. Assessment of intraseasonal variabilities in China Ocean Reanalysis (CORA). Acta Oceanologica Sinica, 35(3):90－101 |
| Assessment of intraseasonal variabilities in China Ocean Reanalysis (CORA) |
| 中国近海以及邻近海域海洋再分析产品(CORA)中季节内变化的评估 |
| Received:June 01, 2015 Revised:November 13, 2015 |
| DOI：10.1007/s13131-016-0820-2 |
| Key words:China Ocean Reanalysis (CORA) intraseasonal variability Madden-Julian Oscillation ocean reanalysis product |
| 中文关键词: CORA 季节内变化 MJO 海洋再分析产品 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | ZHANG Min | Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University, Nanjing 210098, China | | | ZHOU Lei | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | lzhou@sio.org.cn | | FU Hongli | Key Laboratory of Marine Environment Information Technology, National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China | | | JIANG Lianghong | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | | | ZHANG Xiangming | State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China | |
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| Abstract: |
| A regional reanalysis product-China Ocean Reanalysis (CORA)-has been developed for the China's seas and the adjacent areas. In this study, the intraseasonal variabilities (ISVs) in CORA are assessed by comparing with observations and two other reanalysis products (ECCO2 and SODA). CORA shows a better performance in capturing the intraseasonal sea surface temperatures (SSTs) and the intraseasonal sea surface heights (SSHs) than ECCO2 and SODA do, probably due to its high resolution, stronger response to the intraseasonal forcing in the atmosphere (especially the Madden-Julian Oscillation), and more available regional data for assimilation. But at the subsurface, the ISVs in CORA are likely to be weaker than reality, which is probably attributed to rare observational data for assimilation and weak diapycnal eddy diffusivity in the CORA model. According to the comparison results, CORA is a good choice for the study related to variabilities at the surface, but cares have to be taken for the study focusing on the subsurface processes. |
| 中文摘要: |
| 本文通过与观测资料以及ECCO2、SODA两个再分析产品的比较,评估了中国近海以及邻近海域海洋再分析产品(CORA)中的季节内变化。结果表明,与ECCO2和SODA资料相比,CORA资料能较好的刻画海表温度和海表面高度的季节内变化特征,这主要是由于CORA资料在中国近海及邻近海域具有较高的分辨率,同化了更多的区域数据,并且CORA所用模式对季节内尺度的大气强迫(主要是MJO)似乎有较强的响应。但在海洋次表层,CORA的季节内变化比现实要弱,这可能是因为同化的观测资料较少以及CORA所用模式的海洋内部垂向混合较弱。综上,CORA资料适合于中国近海海洋表层季节内变化的研究,但不太适合海洋次表层季节内过程的研究。 |
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