摘要
2010年4月7～9日吉林省连续3日出现大风沙尘天气,通过对天气形势及卫星云图和相应物理量场的分析得出:蒙古气旋东移形成大的气压梯度是大风形成的主要原因;高空涡度平流、中低空温度平流、促使地面低压强烈发展生成新的锋面气旋是大风形成的中尺度系统;动量下传加大了地面的强风和沙尘天气。
During April 7-9,2010,the gale and dust weather appeared in Jilin Province. By analyzing the weather situation,the satellite cloud image and the relative physical quantity field,it was found that the great air-pressure gradient which was formed by the eastward shift of Mongolian cyclone was the main reason of gale formation. The high-altitude vorticity advection and the temperature advection in the middle-low altitude promoted the ground low-pressure to develop strongly and generate the new frontal surface cyclone which was the meso-scale system of gale formation. The momentum down-transmission enhanced the strong wind and dust weather on the ground.
出处
《安徽农业科学》
CAS
北大核心
2010年第30期17139-17142,17145,共5页
Journal of Anhui Agricultural Sciences
关键词
大风
沙尘
气压梯度
动量下传
沙源
Gale
Dust
Air-pressure gradient
Momentum down-transmission
Sand source
