Diurnal variations in sea surface temperature and precipitable water observed over the tropical Ocean

大尺度运动和湿度变化之间的关系进行了研究。结果表明，水分的变化具有显著的3-4天周期，而3-4天周期的变化强烈地受到海表温度日变化的调制。在M-J振荡的发展阶段，观测到了3-4天的周期变化，并可能在M-J振荡的发展中起重要作用。

The relationships between large-scale motion and moisture variations are investigated. The results indicate that moisture variations show a prominent 3-4-day period, ant the 3-4-day-period variations are strongly modulated by the significant diurnal cycle of sea surface temperature. The 3-4-day period variations are observed during the developing phase of Madden-Julian oscillation (MJO) and might play a significant role in the MJO development.