Application of Convection Model to Evolution Law of Kunming Precipitation
TAO Yun;LIU Yu;MA Zhen-feng
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Chengdu Institute of Plateau Meteorology, China Meteorological Administration, Chengdu 610072, China;2. Meteorological Observatory of Yunnan Province, Kunming 650034, China
Applying convection equation describing local precipitation anomaly system and real-time meteorological observatory data, the nonlinear oscillation equation describing Kunming precipitation anomaly system was derived and retrieved. According to the nonlinear oscillation theory and the obtained equation, the nonlinear characteristics and evolution law of Kunming precipitation anomaly system were studied.The results show that Kunming precipitation anomaly systemis a positive damping system with weak nonlinear oscillation. Its natural period is 65 days. Without the exernal forcing, it will go to a stable point a1(0, 0). With the exernal forcing, it will oscillates with the exernal force oscillation.