摘要
本文提出“连续垂直运动区”的概念，对边界层中的对流泡状运动进行了重新定义。由此将对流边界层划分为上升泡区、下沉泡区和环境气流区，并利用大涡模拟提供的对流边界层数值模拟结果研究这种泡状运动的结构。研究结果较好地解释了一些有关泡状运动结构方面的似乎相互矛盾的观测事实。
A new concept of “spatially connected region of vertical motions” is presented for a better definition of bubble-like convective motions through the convective boundary layer (CBL). According to this new definition, CBL is divided into three regions including the up-bubbles, down-bubbles. Velocity and temperature fields derived from the large eddy simulation are employed to study the structure of this bubble-like convective motions. The results can be used to interpret some contradictory observation phenomena on the updrafts and downdrafts. Finally, some of the new characteristics of the convective bubbles are revealed in this paper.
出处
《大气科学》
CSCD
北大核心
1997年第2期223-230,共8页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金
关键词
对流泡
对流边界层
大涡模拟
涡度
convective bubbles convective boundary layer large eddy simulation
