摘要
采用合成分析方法，将中国大陆中尺度对流复合体的生命史划分为７ 个子阶段，详细探讨ＭＣＣ演变过程中的能量生消特征。结果表明：在ＭＣＣ的持续阶段，５００ｈＰａ 以下始终有深厚不稳定层存在，不稳定度渐渐减小，水汽、热量从西南和偏南方进入ＭＣＣ，最大通量值出现在９００～５００ ｈＰａ 高度。高、低、中空环流配合对ＭＣＣ的启动和发展有重要意义。
The lifespan of MCC over China mainland is divided into 7 stages with the features of its energy evolution process discussed in detail.Results show that there exists a deep instable layer below 500hPa during the whole MCC lifespan with the instability decreasing generally and that the moisture and heat flow into MCC from its southwest and south side with the maximum flux being at 900~500hPa.It is also found that the low level jet accompanied with upper level jet and mid/low level trough is favourable to the formation and development of MCC.
出处
《南京气象学院学报》
CSCD
1999年第4期720-724,共5页
Journal of Nanjing Institute of Meteorology
关键词
中尺度
对流复合体
合成分析
能量分析
环境场
mesoscale convective complexes(MCC)
composite analysis
energy evolution
