Furthermore, the features of intra-seasonal oscillation related to the onset of ENSO episode were also discussed.

The NCEP/NCAR 850-hPa zonal wind reanalysis data are calculated by using the band-pass filter to study the propagating characters of the atmospheric intraseasonal oscillation(ISO) in the East Asian monsoon region.

The NCEP/NCAR 850 hPa zonal wind reanalysis data are calculated by using the band-pass filter to study the atmospheric intraseasonal oscillation,which can express the activity character of the East Asian summer monsoon stream.

Atmospheric intraseasonal oscillation(ISO) is very important in the long-range weather and climate variation.

Performance Contrast between Two Filters in Madden-Julian Oscillations Analysis;

The SST intraseasonal variability is closely associated with the structure of Madden-Julian oscillation(MJO).

Based on the data from remote sensing and in situ observation,and the re-analysis data of air-sea fluxes,lag correlation and composite analysis are used to analyze the physical structure of Madden-Julian oscillation(MJO)in the tropical Indian Ocean during winter.

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.