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李昂,张苗茵,朱学明,祖子清,王辉.一种基于不同表面强迫方式对CFSR表面通量资料进行修正的方法探讨[J].海洋学报,2019,41(11):51-63
一种基于不同表面强迫方式对CFSR表面通量资料进行修正的方法探讨
A research on the optimal approach of CFSR surface flux data correction based on different surface forcing modes
投稿时间:2018-09-04  修订日期:2018-12-24
DOI:10.3969/j.issn.0253-4193.2019.11.006
中文关键词:  海表面温度  CFSR  表面大气强迫  热通量修正
英文关键词:sea surface temperature  CFSR  surface atmospheric forcing  heat flux correction
基金项目:国家重点研发计划(2017YFA0604203);自然科学青年基金项目(41506040)。
作者单位E-mail
李昂 国家海洋环境预报中心 国家海洋局海洋灾害预报技术研究重点实验室北京 100081  
张苗茵 国家海洋环境预报中心 国家海洋局海洋灾害预报技术研究重点实验室北京 100081  
朱学明 国家海洋环境预报中心 国家海洋局海洋灾害预报技术研究重点实验室北京 100081 zhuxm@nmefc.cn 
祖子清 国家海洋环境预报中心 国家海洋局海洋灾害预报技术研究重点实验室北京 100081  
王辉 国家海洋环境预报中心 国家海洋局海洋灾害预报技术研究重点实验室北京 100081  
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中文摘要:
      海表面温度(SST)的变化是海气相互作用的重要体现,SST的准确模拟也是海洋内部温度模拟的基础。基于区域海洋模式,本文通过对比分析两种强迫方式对SST的模拟效果,诊断了各辐射场对SST模拟效果的贡献,基于EOF分析法提出了一种针对CFSR表面大气强迫辐射数据的修正方案,并获取一套高频辐射场修正数据。数值对比试验结果显示,利用COARE 3.0公式计算所得表面强迫的方式模拟的SST结果更好,其均方根误差比直接强迫方式降低约39%;潜热辐射差异是两种强迫方式对SST模拟效果差异的主要原因,感热辐射差异次之,同时对两者进行修正可以显著改进SST的模拟效果;而长波辐射的修正则对冬季的SST模拟效果改善比较明显,但贡献仍弱于潜热辐射。相对于海洋模式而言,准确可靠的大气强迫数据的选择要优于强迫方式的选择。
英文摘要:
      Sea surface temperature (SST) is an important expression of air-sea interaction, and accurate simulation of SST is also the foundation of ocean internal temperature prediction. This paper attempts to diagnose the contribution of radiation fields on SST simulation by comparing the results of SST driven by two different surface forcing modes employing the Regional Ocean Model System (ROMS). According to the EOF analysis method, a correction scheme on CFSR surface atmospheric forcing radiation data is proposed, and therefrom, a high frequency revised dataset of CFSR radiation flux is obtained. The comparison tests show that surface forcing derived from the COARE 3.0 formula mode improves simulating performance of SST, as the RMSE decreases by 39% comparing to direct forcing mode. Comparing the thermal radiation fields of the two forcing modes, it is found that latent radiation is the main reason for different performances of SST simulation, and following by the effect of sensible heat radiation difference. Correction of both two radiation fields could improve the SST simulation results significantly; and correction of longwave radiation shows a more significant effect in winter which is still weaker than that of correction of latent radiation. In comprehensive, the accurate dataset of surface forcing field is more effective than change the choice of forcing mode.
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