应用欧拉二阶闭合模型研究了大气热层结条件下森林冠层显热通量源汇分布和通量特征.结果表明：白天，冠层上的不稳定层结和冠层下的稳定层结是森林冠层大气层结的一种特有现象；温度廓线的变化表明林冠高度2/3处存在较强的热源；冠层内大气处于弱稳定状态时，热量继续向上输送，呈现出热通量的反梯度输送.显热通量日变化的模拟值与实测值吻合，其R2=0-9035（P<0.01）.在显热收支方程中添加浮力项，可提高反演模型在实际大气中的模拟精度，从而改善模型对热通量收支的模拟能力.
By using Eulerian second-order closure model, this paper studied the source-sink distribution and flux characteristics of sensible heat within forest canopy under atmospheric thermally stratified condition. In the daytime, a notable feature for the atmospheric stratification of forest canopy was the unstable stratification above the canopy and the stable stratification under the canopy. The changes of temperature profile indicated there was a ‘hot spot’ at about 2/3 of canopy height. The counter-gradient fluxes within the canopy were discoered by modeling the heat flux under weak stable atmospheric condition. Simulations of the diurnal variation of sensible heat flux were consistent with the measurements (R2=0.9035, P<0.01). Adding buoyancy in the sensible heat balance equation could increase the simulation accuracy of inversion model, and improve the simulation capability for heat flux balance.