The evolution of Asian summer monsoon is analyzed by means of decomposition of the atmospheric circulationinto basic current and slowly varying monsoon disturbances. It is seen that the major slowly varying disturbanc...The evolution of Asian summer monsoon is analyzed by means of decomposition of the atmospheric circulationinto basic current and slowly varying monsoon disturbances. It is seen that the major slowly varying disturbances aretwo vortical couples, one located in the indian Ocean and indian Peninsula, and another in the Northern Hemisphericwestern Pacific Ocean and the East Asia. This indicates that the Asian summer monsoon consists of two branches, theIndian monsoon and the East Asian monsoon. Moreover, the analysis shows that the evolutionary processes of thesetwo vortical couples are rather independent each other, and they all can be qualitatively interpreted by the dynamicaltheory of wave packet. The different stages of summer monsoon can be very well characterized by the location and in-tensity of the two vortical couples. Besides, in particular years there exists also some quasistationary wave train andits characteristics should be further analyzed.展开更多
Propagation of coupled electrostatic drift and ion-acoustic waves（DIAWs） is presented. It is shown that nonlinear solitary vortical structures can be formed by low-frequency coupled electrostatic DIAWs. Primary wave...Propagation of coupled electrostatic drift and ion-acoustic waves（DIAWs） is presented. It is shown that nonlinear solitary vortical structures can be formed by low-frequency coupled electrostatic DIAWs. Primary waves of distinct（small, intermediate and large） scales are considered. Appropriate set of 3 D equations consisting of the generalized Hasegawa-Mima equation for the electrostatic potential（involving both vector and scalar nonlinearities） and the equation of motion of ions parallel to magnetic field are obtained. According to experiments of laboratory plasma mainly focused to large scale DIAWs, the possibility of self-organization of DIAWs into the nonlinear solitary vortical structures is shown analytically. Peculiarities of scalar nonlinearities in the formation of solitary vortical structures are widely discussed.展开更多
文摘The evolution of Asian summer monsoon is analyzed by means of decomposition of the atmospheric circulationinto basic current and slowly varying monsoon disturbances. It is seen that the major slowly varying disturbances aretwo vortical couples, one located in the indian Ocean and indian Peninsula, and another in the Northern Hemisphericwestern Pacific Ocean and the East Asia. This indicates that the Asian summer monsoon consists of two branches, theIndian monsoon and the East Asian monsoon. Moreover, the analysis shows that the evolutionary processes of thesetwo vortical couples are rather independent each other, and they all can be qualitatively interpreted by the dynamicaltheory of wave packet. The different stages of summer monsoon can be very well characterized by the location and in-tensity of the two vortical couples. Besides, in particular years there exists also some quasistationary wave train andits characteristics should be further analyzed.
文摘Propagation of coupled electrostatic drift and ion-acoustic waves（DIAWs） is presented. It is shown that nonlinear solitary vortical structures can be formed by low-frequency coupled electrostatic DIAWs. Primary waves of distinct（small, intermediate and large） scales are considered. Appropriate set of 3 D equations consisting of the generalized Hasegawa-Mima equation for the electrostatic potential（involving both vector and scalar nonlinearities） and the equation of motion of ions parallel to magnetic field are obtained. According to experiments of laboratory plasma mainly focused to large scale DIAWs, the possibility of self-organization of DIAWs into the nonlinear solitary vortical structures is shown analytically. Peculiarities of scalar nonlinearities in the formation of solitary vortical structures are widely discussed.
