淮河流域麦田湍流通量输送特征分析

利用淮河流域寿县国家气候观象台2007年11月至2008年5月的湍流通量观测资料，分析了该区域麦田湍流通量输送特征，结果表明：小麦各生育期净辐射通量、显热通量和潜热通量都存在明显的日变化；净辐射日变化最大值出现在成熟期；显热通量在中午温度最高时达到最大值，夜间显热通量多为负值；潜热通量峰值出现时间比净辐射通量峰值延迟1h左右；自拔节期开始，麦田潜热通量日平均值都大于50.0 ；三叶期和分蘖期，土壤热通量日平均值都为负值，其它时期为正值；H/Rn和LE/Rn均有明显的季节变化，且变化方向相反。

Turbulence Fluxes Over The Wheat Field In Huaihe River Basin

Based on the data of the flux observation system of the Shouxian National Climate Observatory from November 2007 to May 2008,an analysis is made of the turbulent characteristics in the wheat field ecosystem over the Huaihe River Basin.Diurnal variation of the net radiation is the greatest at the maturing stage.When the temperature reached the highest at noon,heat flux reaches maximum,and heat flux shows negative at night.The peak time of latent heat flux delays about one hour than the peak time of net radiation.From jointing stage,the average diurnal variation of latent heat flux is higher than 50.0 W/m 2.The average diurnal variation of soil heat flux is positive except 3-leaf and tillering stage.H/Rn and LE/Rn have characteristics of significant seasonal variations,and their change direction is opposite.