东海近海台风发生发展的动能收支

用2.5×2.5经纬距热带网格资料,对东海近海台风(以8211号台风为例)的动能收支进行了分析研究。初步结果表明,台风是一个强大的动能源,其发生发展不同阶段的动能平衡有着较大的差异,平均环流和涡动过程在台风的发生发展各不同阶段的作用不同。我们发现的主要事实有二,(一)在台风发展过程中,其中层有明显的动能制造过剩;(二)动能制造量的变化与台风未来的强度变化有关,具有一定的预报指示意义。 

THE KINETIC ENERGY BUDGET OF A TYPHOON OVER THE EAST CHINA SEA COASTAL WATERS

The kinetic energy budget of typhoon 8211 over the East China Sea coastal waters is analyzed and studied, using the data of 2.5×2.5 Jogitude and latitude degree tropical grids. Preliminary results show that the typhoon is a strong kinetic energy source, there are larger differences of kinetic energy balance in each generating and developing periods, the role of mean storm circulation and eddy processes is different at each generating and developing periods. We find the major facts are: (1) There are obvious residue of kinetic energy generation in the middle layer of the typhoon developing processes; (2) The variation of kinetic energy generation is related to future strength change of a typhoon.These facts may have certain forecast indication sense.