利用简化动力学近似分析黑河实验区的感热通量

本文利用简化动力学近似．运用统计和参数化两种方法分析了黑河实验区的感热通量．结果表明：不稳定条件下绿洲区的感热通量与近地面辐射温度(T3)和空气温度(Ta)之差符合幂定律方程；沙漠地区符合形式为H=f[u(T2-Ta)]的幂定律方程。利用从实验得到的热传输附加阻尼表示式kB^-1=0．2u(T2-Ta)用于对空气动力学阻尼(ra)的参数化，可适用于不同下垫面．并得到了比较满意的感热通量值．最后利用以上结果计算了实验区的潜热通量并做了比较分析。

ANALYSIS OF SENSIBLE HEAT FLUX BY USING THE SIMPLIFIED AERODYNAMIC APPROACH METHOD OVER HEIFE AREA

A calculation is made with two methods of simplified aerodynamic approach for determining sensible heat flux over both desert and oasis. The first method is a statistical analysis between the sensible heat flux(H) and surface-air temperature difference (Ts-Ta); the second method is via a parameterization of heat transfer resistance( ra).The results show that under unstable condition the relationship between sensible heat flux and (Ts-Ta) fits power law equation over oasis area, but over desert region the relationship between the sensible heat flux and(Ts-Ta) is influenced by wind speed. Application of this result in the estimation of latent heat flux( LE) can also give satisfactory results. A form for the added resistance in heat transfer process, kB-1 = 0.2u(Ts-Ta), can be used over both desert and oasis area.