台风内核与外围加热对其强度突变的影响

THE EFFECTS OF HEATING IN THE INNER CORE AND THE EXTERNAL PART OF TYPHOON ON THEIR INTENSITY ABRUPT CHANGES

中文关键词:  台风内核与外围  加热作用  强度突变

英文关键词:Inertial-gravity wave  Inner core and external part of typhoon  Heating effect  Intensity abrupt changes

中文摘要:

      采用准动量无辐散模式,考虑非绝热加热过程,探讨了加热、惯性稳定度、层结稳定度以及非热成风等物理因子对台风中的重力惯性波强度变化的影响.进而把台风内核与外围的加热过程加以区别,指出要引起内核强度突变不仅要有非线性动力过程,而且要有非线性加热过程;而要引起外围强度突变则要有非线性动力过程以及定常的加热过程.

英文摘要:

      Using quasi-momentum non-divergence medel involving adiabatic heating process,the influences of heating,inertial stability,stratified stability and non-therrnal wind on the intensity change of inertial-gravity wave in typhoon are investigated.Furthermore the heating processes of inner core and external part of typhoon are considered respectively.The results show that the necessary conditions of abrupt change of intensity in typhoon for inner core are not only the nonlinear dynamical but also the nonlinear heating processes,and those for external part are the nonlinear dynamical and steady heating processes.