全球海洋模式中不同海表热力与动力强迫对海温模拟的影响-海洋预报

全球海洋模式中不同海表热力与动力强迫对海温模拟的影响

单位：1. 北京大学物理学院, 北京100871;
2. 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

分类号：P731.11

出版年·卷·期（页码）：2015·32·第四期（1-11）

摘要：

对比了两套不同空间分辨率的海表热通量和风应力资料的差异,并将这两套外强迫数据作为全球海洋环流模式MOM4的上边界,研究不同的外强迫对全球海温模拟的影响。通过将两组试验的全球海温的气候态SST、经向平均的垂直海温、海温的季节及年际变化特征与SODA数据进行对比分析。结果表明:不同的外强迫对全球海温的模拟具有重要的影响,虽然采用这两套外强迫数据模拟的海温在大尺度的空间分布上与观测较为一致,但同时也存在一定的差异。这些差异总体表现为:采用CFSR数据作为模式外强迫时,模拟的海温表现为印度洋及大西洋区域的海温误差相对较小,而采用NCEP数据作为模式外强迫时,模拟的海温表现为太平洋区域的海温误差相对较小。两组试验模拟的海温差异的分布及特征与这两套数据净热通量差异的分布及风应力差异的分布相一致。未来建立海洋气候预测系统时,应该根据业务需求更加合理的选择外强迫数据。

In this study, heat fluxes and wind stress from two datasetsare compared, and they are used as the upper boundary condition for a global oceanic general circulation model MOM4.The effect of ocean temperature to the fluxes and wind stresses are conducted. By comparing global climatic SST, vertical distribution of average meridional temperature, seasonal and interannual variability of SST among numerical experiments and SODA,the effect of different two forcing data to the ocean temperature simulation is evaluated. Although the large scale patterns of simulated ocean temperature fit well with the observation, there are also some differences. In the CFSR experiment, the simulation bias of ocean temperature is relatively small in the Indian Ocean and Atlantic Ocean. In contrast, the simulation bias of ocean temperature is relatively small in the Pacific Ocean in the NCEP experiment. The distribution of ocean temperature is closely related to the pattern of net heat flux and wind stress.In general, the suitable forcing data for the ocean climate forecast system should be chosen in the near future.

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