近60年盘锦地区农作物生长季降水变化特征分析

Analysis of Precipitation Variation Characteristics in Crop Growing Season in Panjin area in Recent 60 Years

本文应用盘锦地区1960—2019年国家基本气象站逐日降水资料,通过线性趋势、滑动平均的方法,分析了盘锦农作物生长季降水不同时间尺度年际、年代际变化及季节变化特征,结果表明:盘锦农作物生长季季平均降水量整体呈逐年减少趋势,气候倾向率为-10.5 mm/10年;生长季各季节降水呈现不同的变化特征,春季降水量无明显变化,夏季、秋季降水量呈显著减少趋势,其中5月、6月、10月份降水量呈略有增加趋势,其余时间段均呈不同程度减少趋势;生长季降水量年际、年代际变化明显,2000年以后,发生降水量显著偏少的异常年份明显增多,降水量年际变化出现明显震荡的特征,气候极端性增强,易出现旱涝现象。

Based on the daily precipitation data of national basic meteorological station in Panjin area from 1960 to 2019,the characteristics of interannual,interdecadal and seasonal variations of precipitation in different time scales in Panjin were analyzed by linear trend and moving average method.The results showed that:The average precipitation in growing season of crops in Panjin decreased year by year,and the climate tendency rate was-10.5mm mm/10 a;In the growing season,the precipitation in each season showed different characteristics.There was no significant change in spring precipitation,but the precipitation in summer and autumn showed a significant decrease trend,in which the precipitation in May,June and October showed a slight increase trend,and the other time periods showed a decreasing trend to varying degrees;The interannual and interdecadal changes of precipitation in growing season are obvious.After 2000,the number of abnormal years with significantly less precipitation is significantly increased,and the interannual variation of precipitation shows obvious characteristics of oscillation.Climate extremes increase and drought and flood are easy to occur.