首先利用华南暴雨实验区中的加密观测资科，对气压场消除日变化及滤波，得到了间隔为一小时的中尺度气压场。
Increased observational data in the experimental region are employed in eliminating diurnal changes of pressure field and then filtering with the result of a meso-scale pressure field with 1-hr intervals .
气压日变化