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为探索西沙和南沙海气热通量时间演变特征,用海洋站观测资料计算了1998年南海夏季风爆发前后,海气界面热量交换值及海面热收支年循环。结果表明:季风爆发前,西沙海气界面热量交换较弱,水汽通量较小,以海洋获得热量为主;季风爆发后,海气界面热量交换接近平衡。南沙全年主要是海洋对大气加热。南沙和西沙海面吸收短波辐射年周期特征明显,极大值出现在冬半年。西沙海面潜热通量存在半年周期特征,极大值也是出现在冬半年。结论:冬半年海面热通量变化对翌年的季风将产生重要影响。
In order to explore the temporal evolution of the air-sea heat fluxes in the Xisha and Nansha Seas, the heat exchange values of the air-sea interface and the annual cycle of the heat budget for the sea surface were calculated before and after the onset of the South China Sea summer monsoon in 1998 by observing the ocean station data. The results show that before the onset of the monsoon, the heat exchange at the Xisha gas interface is weak and the water vapor flux is small, and the heat is mainly obtained by the ocean. After the monsoon onset, the heat exchange at the air-sea interface is close to equilibrium. Nansha is mainly the year round the ocean heating the atmosphere. Nansha and Xisha sea surface absorption shortwave radiation characteristics of the annual cycle, the maximum appears in the winter half year. The latent heat flux in the Xisha Sea is characterized by a half-year period, and the maximum appears in the winter half year. Conclusion: The variation of sea surface heat flux in the winter half year will have a significant impact on the monsoon of the following year.