地-气温差的模拟与地温估算研究  

Studies on the Simulation of Difference Between Soil Surface Temperature and Air Temperature and the Estimation of Soil Surface Temperature

作　　者：李有[1] 董中强[1] 郑敬刚[1] 

机构地区：[1]河南农业大学,郑州450002

出　　处：《中国农业气象》2002年第3期1-4,共4页Chinese Journal of Agrometeorology

摘　　要：利用谐波分析方法模拟了河南各地月平均地 -气温差的年变化。结果表明 :2～ 10月 (植物生长期 )的地 -气温差均大于 1.0℃ ;大部分地区月平均地 -气温差年变化为双峰型 ,最高值出现在 6月 ,次高值出现在 8月。由于 12个月周期的拟合度占总拟合度的 90 %以上 ,故用这一单波估算地 -气温差和地温是非常精确的。The annual fluctuations of the difference between the mean monthly soil surface temperature and the mean monthly air temperature (DSAT) were simulated by the harmonic analysis method in Henan. The DSAT exceeded wholly 1.0℃ from February to October (plant growing period); The annual fluctuations in DSAT in the most areas of Henan Province were double-peak types. The maximum DSAT was in June and the second maximum was in August. Because 12-month-periodic coincidence degree took more than 90% of total periodic coincidence degrees, the 12-month-periodic model could accurately simulate DSAT and the mean monthly soil surface temperature.

关 键 词：模拟 估算 地-气温差 谐波分析 拟合度 地温 

分 类 号：S161.21[农业科学—农业气象学]