对流层大气运动的Lagrange方法及应用

LAGRANGE METHOD USED IN ATMOSPHERIC MOTION OF STRATOSPHERE

该文对对流层中轨迹法的应用进行了试验研究． 结果表明，对流层中等熵面上轨迹法应用效果最好，同时通过对物质线轨迹积分的改进，即在积分过程中不断加入新的点以保持物质线上点的密度，使轨迹法能够利用现有的资料分辨率，更细致的描述大气环流的演变． 利用轨迹法分析了１９９１ 年江淮梅雨期７ 月１～７ 日过程的水汽输送，表明此次过程江淮地区的水汽输送主要来源于孟加拉湾及南海，且强度以前者较大．

The applying and modifying study on the Lagrange method is carried out .The results show that the Lagrange method on the isentropic surface gives the best effect,and the variation of the material contour can be studied more finely using the modified Lagrange method.Based on the experiments,the transport of the water vapor in the case during the period of Changjiang-Huaihe Basin Meiyu in July 1991 is diagnosed.The analyses show that the vapor is mainly transported from the South China Sea and the Bay of Bengal,and the latter is stronger.