摘要
用合成分析方法探讨MCC热力学结构的演变规律,结果表明:MCC整个生命史里,对流层中下部为正涡度区,200hPa以上为负涡度区;发展时刻辐合区突然抬升;MCC前期的垂直上升速度最大中心高度低于后期的;MCC的高低空的冷心。
The MCC's thermodynamics structure and evolution process is researched with composite analysis method. The major findings are as follows :the composite MCC is characterized by cyclonic vorticity confined within low-level and middle-level span MCC and anticyclonic vorticity located exclusively in the upper troposphere ; the composite MCC exhibits convergence expands and lifts to the middle troposphere during the MCC's growth and mature stages; upward motion maximum gradually rises ;the composite MCC exhibits the cool center in upper and low level , the warm center in the middle level during the early stage which is dim at the later period.
出处
《干旱气象》
1998年第4期34-36,共3页
Journal of Arid Meteorology