西北太平洋西边界流系源区的数值模拟研究

采用POM模式对2005年西北太平洋西边界流系源区进行了数值模拟.针对该海区海表热通量与POM模式匹配困难的问题,在模拟过程中,分别采用由同化AMSR卫星资料插值得到的日平均海表温度场以及由NCEP资料得到的海表净热通量与长、短波辐射通量两种方案来进行海表热强迫.通过与SODA资料的分析结果对比,POM模式模拟结果较好地显示出北赤道流,黑潮源区及棉兰老海流的基本特征,两处断面流速与实际探测资料较为吻合;高度场模拟结果与实况较为一致,但0.9m水位高度线范围呈缩小-放大-缩小-放大的季节性震荡与实况中维持稳定存在一定差异;海温模拟结果与月平均的SODA资料总体一致,但在春夏两季温度略高.

Numerical simulation study on source region of western boundary current system in the northwest Pacific Ocean

The POM model was used to simulate the source region of western boundary current system in the northwest Pacific Ocean. Considering the matching difficulty between sea surface heat flux and POM model, the daily average sea surface temperature field obtained by interpolating the assimilation AMSR satellite data and the sea surface net heat flux and long-short wave net radiation flux obtained by NCEP data were used for sea surface thermal forcing respectively. Compared with the analysis results of SODA data, the simulation results of the POM model can well express the basic characteristics of north equatorial current, Kuroshio source area and Mindanao current. The simulated flow velocities of the two sections are generally identical to the actual sounding data. The simulation results of height field are generally in good agreement with the recording data, but there were some differences between them. The range of 0.9m water level presents a seasonal variation of reduction-amplification-reduction-amplification, but it remains stable according to the recording data. The sea surface temperature simulation results are generally in good agreement with the monthly average SODA data, but are a little high in spring and summer.