摘要
采用常规气象资料、NCEP、GRAPES_LZ、甘肃河东区域站观测实况、卫星云图、雷达拼图结合甘肃河东地区的地形特点对2016年6月13日8:00至14日8:00的雷雨大风和冰雹过程进行分析。结果表明:此次河东降雹主要是受蒙古西部冷涡后部冷平流南亚东移的影响,水汽条件较好(700 h Pa河东比湿>8 g/kg),CAPE>1 000 J/kg,T_(700-500)>20℃产生深厚不稳定层结,同时河东受槽后西北气流控制,高低空西北风急流明显创造了抬升条件。
The strong wind and hail process from 8：00 AM on June 13,2016 to 8：00 AM on June 14,2016 was analyzed using the conventional observation data,NCEP,GRAPESLZ,actual observation data,satellite and radar images,and combined with the topographic characteristics of Hedong area in Gansu Province. The results showed that the hail process was mainly influenced by the west Mongolia cold eddy at the back of the cold advection South Asia eastward, deep unstable stratification was formed under the condtions of better moisture conditions（ 700 h Pa humidity ratio 〉8 g / kg）,the CAPE〉 1 000 J/kg,T700-500〉20 ℃.At the same time,Hedong area was controlled by northwest airflow behind trough,northwest wind iet stream was obvious in high and low altitude which all created the lifting condition.
出处
《现代农业科技》
2017年第2期191-193,195,共4页
Modern Agricultural Science and Technology
基金
基金项目 临夏市
和政县城城市内涝气象预警指标研究
