吉林省夏季降水的气候跃变及其与印巴季风低压相关的分析

本文利用气候跃变的分析方法,对夏季吉林省降水量,印巴地区海平面气压距平值及500hPa高度距平值进行了分析。结果表明,它们在1967年前后均有气候跃变(或准气候跃变)出现。印巴地区夏季的海平面气压距平值和500hPa高度距平值均有超前吉林省夏季降水量一年的共同准周期变化,两者距平符号的持续性对吉林省夏季的降水有一定的影响。

The abrupt climatic change of the summer precipitation in Jilin Province and its correlation analysis with the India-Pakistan monsoon depression

In this paper, the precipitation in Jilin Province in summer (June-August) and the departures of SLP (sea level pressure) and height at 500 hPa in the India-Pakistan region were analyzed with the analytic scheme of abrupt climatic change.The results suggested that abrupt climatic changes (or quasi-abrupt climatic changes) happened around 1967. Both the precipitation and the departures of SLP and the height at 500 hPa have the same quasi-periodic variation. The departures of SLP and the height at 500hPa are in advance of the precipitation about one year. Anomalous signs SLP and the height at 500hPa in India-Pakistan region have conservative property .This conservative property have an effect on precipitation in Jilin Province in summer.