【摘要】 <正>这两个方程中,涉及5个因子,故一般应进行3个因子的实际测定,方可求解。而这些因子中的P、E、R的测定都是比较困难的。因此,人们企图建立独立的第三个方程。特别是着眼于蒸发、蒸发力和降水量、辐射差额的相互关系的研究,其中著名的有M.更多还原

【Abstract】 In his article "On the Climatology of Heat Balance", A. S. Monin criticized M. I. Boudko ’s corresponding work "On the Climatology of Heat Balance". In these two articles, the correlative equation of the heat and water balance, presented by M. I. Boudko in 1948, was also discussed. The authors of this paper, with a view to the evaporation of the dryland relating to the heat exchange and the water exchange, derive a new correlative equation as follows :We therefore obtain a differential equation with regard to the evaporation E, which depends upon the precipitation and the radiational balance, the Pf f av ’s equation :It is possible to solve this equation conditionally by the following general solution:Where A denotes an adopted constant for a given zone, the value of which is -18k Cal/cm2 per year; R in K Cal/cm2/year ; E and r in g/cm2/year and L is the latent heat of the evaporation, with a value of 0.6 K Cal/g/year.According to this equation, the values of the evaporation of dryland in several regions in the People’s Republic of China were calculated.The results thus obtained correspond completely to those gained by the calculation on the basis of the equation of the water balance. A comparison between the results obtained by different formulas is made in the following Tables.We suggest that a new correlative equation could be established.From such a point of view, it is considered resonable that A. S. Monin ’s critic on M. I. Boudko owned a definite basis, because E/r depends not only upon R, r, but also upon the values of coefficient A. The coefficient A is clearly characteristic of geogra-phical zonation.更多还原