摘要
设计一种计算陡峭地形区气压梯度力的新方法，即误差扣除法，给出了误差扣除法的基本原理。然后，选用理想大气，用３种近似计算式进行了检验。结果表明，这３种方法在单独用于气压梯度的计算时，计算值都有较大误差，在地形陡峭区，相对误差可以达到２０％以上。即使在平缓地形区，相对误差也不可忽略，只有平均温度格式可以满足精度要求，担当这３种格式在误差扣除法中应用时，绝对误差和相对误差都大大减小，相对误差的量级可达到１０－２。
A new method of computation of the pressure gradient force for high and steep topographic areas is developed and named as error subtraction method. The basic principle of the method,which is simple and accurate,is given. Later , ideal atmospheres and three approximate formulas for computation of pressure gradient force are used to check the method. Results show that all of the three methods are not precise enough when they are directly used in computation. In areas with steep slopes the relative errors of the three formulas can reach 20% or above. Even in plain areas with small and low topography,the relative errors are still not negligible.Only the format using average temperature is satisfactory. However,when the three formulas are used in the error subtraction method,the absolute and the relative errors are remarkably reduced , the orders of the relative errors are around 10-2.
出处
《热带气象学报》
CSCD
1994年第4期358-368,共11页
Journal of Tropical Meteorology
基金
85-906攻关项目
关键词
陡峭地形
计算法
误差扣除
气压梯度力
Topographic treatment Computation methods Error subtraction
