用一维能量平衡模式研究华北干旱化的一些问题

SOME PROBLEMS OF THE ARIDIFICATION IN NORTHERN CHINA STUDIED FROM ONE DIMENSIONAL ENERGY EQUILIBRIUM MODEL

近年来华北干旱化表现为降水减小和温度增加 ,本文用一维能量平衡模式在不计平流的条件下研究年温度增加和降水减少间的关系 ,所得结果大致符合我国北方的实际资料。还研究了在二氧化碳倍增情况下一维能量平衡模式得出的华北温度增加大小 ,其值在 1℃左右 ,大致符合数值模式得出的结论 。

In recent years,the decreases of precipitation and increase of temperature in northern China appear which is known as the phenomenon of the aridification in northern China.In this paper,the relation between the decrease of annual precipitation and the increase of annual temperature is studied by use of an one dimensional energy equilibrium model in which the effects of advection is not included.The results are roughly in agreement with the realistic data.Meanwhile,we have also investigated the magnitude of the increase of temperature in northern China induced by the double of carbon dioxide from the one dimensional energy equilibrium model which is around 1 ℃,roughly close to the result of numerical simulation,showing the availablity of the application of this model in the research of aridification in northern China.