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应用１９７９～１９９６年共１８ ａ的 ＮＯＡＡ卫星ＯＬＲ资料及ＮＣＥＰ／ＮＣＡＲ再分 析８５０ｈＰａ风场资料，分析了夏季南海地区及南海季风暴发过程的某些低频特征． 认为北半球夏季南海地区的低频活动较活跃，并且具有明显的年际变化，这种年际变 化同南海季风的暴发时间有联系．南海地区的低频振荡在南海季风暴发后增强．通 过对１８ａＯＬＲ及Ｋ的时段叠加合成图的分析，发现南海夏季风的暴发同赤道印度 洋低频振荡的东传及西太平洋低频扰动西传有密切联系，南海夏季风暴发期间南海 地区将印度洋与西太平洋之间的低频活动联系在一起．
Based on the NOAA satellite OLR data from 1979 to 1996 and the NCEP / NCAR reanalysis 850 hPa wind field data, some low frequency features of summer monsoon onset over the South China Sea and South China Sea are analyzed. It is considered that the low frequency activities of the South China Sea are more active in the Northern Hemisphere in summer and have obvious interannual variations. The interannual variation is associated with the onset of the South China Sea monsoon. Low-frequency oscillations in the South China Sea intensified after the monsoon onset in the South China Sea. Based on the overlay synthesis of 18aOLR and K time series, it is found that the onset of the South China Sea summer monsoon is closely linked with the eastward propagation of the low-frequency oscillation of the equatorial Indian Ocean and the westward low-frequency disturbance of the western Pacific. During the onset of the South China Sea summer monsoon, the South China Sea divided the Indian Ocean and the Western Pacific Ocean Between the low-frequency activities linked together.