作物模拟中的常年气候数据生成子系统

以前人工作为基础，建立了常年逐日气温（包括平均，极端最高和最低气温），日照时数，降雨量，太阳辐射等气象要素的生成模型。并对降雨量和太阳辐射模型进行了改进，取得满意效果。采用VB6.0作为系统开发工具，研制成基于Windows操作平台的作物模拟中的常年气候数据生成了系统，利用南京40年和郑州30年的历史气候资料，分别对该系统进行检验。模拟值与实际情况相符，相关系数分别为0.93和0.89。

Subsystem of weather generator in crop growth and development simulation model in a normal year

A climate generator model,which can be used to simulate weather factors such as daily temperature,sunshine duration in hour,rainfall,solar radiation in a normal year,was established based on the previous work.The daily temperature includes the mean,maximum,and minimum temperature in a day.The authors improved particularly the daily rainfall model and the daily solar radiation model,and obtained a good simulating effect.The weather data generating subsystem in crop growth simulation was also accomplished with the development tool of VB 6 0.It can be run on the Windows platform.Validation of this subsystem in the areas of Nanjing and Zhengzhou showed that the results were good and there was a good agreement between values simulated and values observed.The correlation coefficients between values simulated and actual values are 0 93 and 0 89 orderly in Nanjing area with the historical weather data from 1951 to 1990 and in Zhengzhou area with those from 1951 to 1980