At first , according to the definition of wmo , i gave the index to identify strong ssw event , and by which , i had a systemic statistic on the day - by - day temperature , air pressure , wind field in the stratosphere from january to march during the period of 1950 - 2002 . finally , i got 35 strong ssw events . comparing these with labitake " s research result , i found the index and process are rational 首先,根據(jù)世界氣象組織定義,給出了識別強ssw事件發(fā)生的指標,用它對1950 ? 2002年1 ? 3月期間平流層大氣逐日溫、壓、風場進行了系統(tǒng)的統(tǒng)計,共得到35次強ssw過程,并將其與labitzke研究結果進行比較,證明了所定指標及過程的合理性。