区域酸性沉降的数值研究Ⅱ．个例模拟和试验

A Numerical Study of Seasonal and Interannual Variabilities of Ozone due to Planetary Wave Transport in the Middle Atmosphere Part II. The Case of Wave-Flow Interaction

利用建立的区域酸性污染物沉降模式，配合中尺度模式ＭＭ４预报的气象场，以１９９１年６月１２－１４日淮河流域的一次降雨过程作为实例，对我国东半部及其相邻地区的酸沉降进行了数值模拟和试验研究。结果表明，模式基本上能够模拟出区域酸性沉降的特征，具有良好的综合模拟性能和广阔的应用前景。

A 34-level coupled planetary wave-zonal flow and global primitive equation model is used to study the effects of planetary wave transport on ozone from the viewpoint of Lagrangian mean circulation while the flows are nonsteady. The results show that the primary features of mean zonal flows and quasi-stationary planetary waves are well simulated with this coupled model. Meanwhile, the calculated seasonal variation of ozone due to planetary wave transport of ozone is similar to the observed one. The interannual variation of ozone due to the planetary wave transport in the case of nonsteady flows is similar to that in the case of steady flows, i.e., the effect of the planetary wave transport on ozone is stronger at the middle and high latitudes during periods of the easterly than the westerly of tropical QBO winds. However, in the case of wave-flow interaction, the interannual variation of ozone due to the planetary wave transport is enhanced greatly.