涡列涡量内传的数值研究

Numerical Study on Relative Vorticity Transfer of Vortex Streets

用一个高分辨率的准地转正压模式实施了4组积分时间为24h的试验,研究台风环流区域中尺度涡列对台风强度的影响,并与单个中尺度涡旋的情况作了对比。结果表明:涡列内传过程中出现了两次涡合并现象,涡列涡量内传对台风强度的影响能力较弱,单个中尺度涡旋涡量内传可使台风增强。

A quasigeostrophic barotropic model is employed for performing four experiments with 24h integration to investigate the impact of mesoscale vortex streets in typhoon circulation on the typhoon intensity,and the results are compared to that of single mesoscale vortex.Results show that the vortex united twice during the process of relative vorticity transfer(RVT) in the vortex streets.The VRVT of the vortex streets has little impact on the intensity of the typhoon,but VRVT of single mesoscale vortex can enhance the typhoon.