This article depicts firstly the progresses in the research on the tropical intraseasonal oscillations,such as the studies on the observation and mechanism of the tropical atmospheric intraseasonal oscillations and on the tropical oceanic intraseasonal oscillations.

On the intraseasonal oscillation(ISO) time scale,the zonal propagation of atmospheric ISO in 2006 had its own uniqueness;the westward and stationary ISO along the latitude belt of the Yangzi River valley was weaker while the eastward and stationary ISO precipitation in Southern China.

The possible changes of intraseasonal oscillation (ISO) feature in tropical atmosphere under the background of global climate warming by means of both diagnosis and numerical simulation are explored in this article.

Some major studies and research achievements on the atmospheric intraseasonal oscillation and its important effects to other climate systems completed in the Institute of Atmospheric Physics during the last 10 years are reviewed and summarized systemati-cally in this paper, particularly some new scientific achievements.

The relationship between outbreak of the South China Sea Summer Monsoon in 1998 and the activity of atmospheric intraseasonal oscillation is systemically studied by using NCEP re-analysis and TBB (Temperature of Black Body) data.