Abstract
The characteristic features of disturbances during the period of January, February and March in 1968 over the China continent and the East China Sea are studied in connection with the Air Mass Transformation Experiment (AMTEX) which is planned as one of the GARP subprogram.
In January, wave disturbances with 6-7-day period which correspond to long waves in middle latitudes are found over the China continent and the East China Sea. In middle January, short waves of 2-3-day period with upper troughs exist and the time-spectra of the mixing ratio of water vapour show large power density in this short period range.
In March, the activity of wave disturbances is weak but the East China Sea area is affected by the passage of long waves whose center is located at higher latitudes.
