盘锦地区春季农业气候资源变化特征分析

Analysis on the Change Characteristics of Agricultural Climate Resources in Spring in Panjin Area

应用盘锦地区1960~2019年国家基本气象站逐日气温、日照、降水等资料,通过线性回归、滑动平均的方法,分析了盘锦地区春季农业热量、光照、降水资源气候变化特征。结果表明:(1)盘锦春季气温呈明显上升趋势,主要表现在最低气温的显著上升。(2)盘锦春季气温稳定通过0℃、5℃、8℃、10℃、15℃界限温度的初日时间均呈不同程度的提前趋势,平均提前时间为5~7 d,(3)春季光照充足,日照时数呈减少的线性年际变化趋势,年代际变化不大,春季热量资源整体呈增加趋势。(4)春季降水量时段分布不均,3月、5月降水量呈线性增加趋势,4月份降水量呈线性减少趋势,春季3~5月和春播期4~5月降水量年际线性变化趋势总体呈略有增加。2000年以后,发生降水量显著偏少和偏多的异常年份明显增多,气候极端性增强。

Based on the daily temperature, sunshine and precipitation data of national basic meteorological station in Panjin area from 1960 to 2019, this paper analyzes the climate change characteristics of agricultural heat, light and precipitation resources in spring in Panjin area by means of linear regression and moving average method. The results showed that:(1)The spring temperature in Panjin showed an obvious upward trend, mainly in the significant increase of the minimum temperature.(2)The spring temperature in Panjin was stable, and the time of the first day of passing the boundary temperature of 0 ℃, 5 ℃, 8 ℃, 10 ℃ and 15 ℃ was advanced in varying degrees, with an average advance time of 5~7 days.(3)The light was sufficient in spring, and the sunshine hours showed a linear interannual trend of decrease, but the interdecadal change was not significant, and the spring heat resources showed an overall increasing trend.(4)The time distribution of spring precipitation is uneven. The precipitation in March and may shows a linear increasing trend, while the precipitation in April shows a linear decreasing trend. The interannual linear variation trend of spring precipitation from March to May and spring sowing period from April to may shows a slight increase. After 2000, the number of abnormal years with significantly less or more precipitation increased significantly, and the climate extremes increased.