Atmospheric Intraseasonal Oscillation and Its Important Effect
大气季节内振荡及其重要作用

Atmospheric intraseasonal oscillation (ISO) or 30-60 day oscillation has been an important frontier project in the atmospheric science since the 1980s. 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. They include the fundamental features and main active regulars of the tropical ISO; the fundamental features and main active regulars of the ISO in middle-high latitudes and its differences from the tropical ISO; atmospheric low-frequency teleconnec-tion in the globe; the dynamical mechanism of the ISO; the influences of the ISO on summer monsoon onset over the South China Sea (Asia) and on summer monsoon anomaly over the South China Sea (East Asia); the interaction between the tropical ISO and El Nino (La Nina) .