盘锦市冬季降水时空变化特征分析

利用盘锦地区近50年（1961~2010年）气象观测资料,对盘锦冬季降水的气候变化趋势和变化特征进行了分析。结果表明,盘锦冬季降水量年际变化呈上升趋势,不同年代呈现几个明显多雨、少雨期,冬季各月降水年际变化趋势不同;含雪降水极值的地域分布存在南北差异。极值在15 mm以上降雪平均每3.6年出现一次,但年代际变化较大;近10年来盘锦地区冬季降水量呈增多趋势,多、少雨年存在2年左右的振荡周期,各类天气日数变化不同。

Analysis of Characteristics of Temporal and Spatial Precipitation in Winter in Panjin City

Based on the past 50 years(1961-2010) climate data of Pan-Jin,the winter precipitation trends and the climate change characteristics in Panjin City were expounded.The results showed that: the interannual variation of winter precipitation was in an upward trend in Panjin,showing several significant rainy periods and dry period at different times;the monthly rainfall over the winter trends were different;the geographic distribution of snowing precipitation had extreme North-South differences.Extreme value was above 15 mm once every 3.6 years on average,but decadal variability was large;precipitation in winter in Panjin in recent 10 years was increasing.There was about 2 years fluctuation period of the rainy years and less rain years.The changes of each kind of weather days were different