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基于南通站和吕泗站1961~2011年的逐日气象资料,利用彭曼公式计算两站的参考作物腾发量(ET0),运用滑动平均、累计距平、M-K等方法分析了两站ET0的变化趋势及不同季节的变化特征。结果表明,长系列中吕泗站ET0有明显上升趋势,南通站ET0变化趋势不明显,但1980年代中期ET0有显著上升趋势;吕泗站和南通站ET0春季上升显著,而降水、相对湿度与ET0具有负相关性,由此可知南通市ET0变化对南通市作物生长存在较大不利影响。
Based on the daily meteorological data from 1961 to 2011 in Nantong and Lu Si stations, the reference crop evapotranspiration (ET0) of two stations was calculated by using the Penman formula. The ET0 of the two stations was analyzed by means of sliding average, accumulated anomaly, MK, Changing Tendency and Variation Characteristics of Different Seasons. The results showed that there was a clear trend of increase of ET0 in long series of Lvsi station, but the trend of ET0 in Nantong station was not obvious. However, ET0 increased obviously in the mid 1980s; ET0 of Luosi station and Nantong station increased significantly in spring, while precipitation, relative humidity and ET0 has a negative correlation, we can see that changes in Nantong ET0 Nantong crop growth there is a big adverse impact.