摘要
利用EC细网格数值预报产品对2015年3月出现在抚顺章党站的2次一般性降水过程的温度变化进行诊断分析,结果表明,EC细网格预报的2 m温度值作为未来温度预报的直接依据有一定的误差,在有降水时,EC细网格2 m露点温度以及1 000 h Pa风在y方向上的分量V在降水前后的变化可作为判断平流降温和非绝热降温的主要依据,如果降水开始后露点温度下降且V分量符号由正转负,说明有冷空气侵入,平流降温明显;如果降水开始后露点温度明显上升且V分量符号没有变化,始终为正值,说明没有冷空气侵入,以非绝热降温为主。
Based on EC fine grid NWP products,temperature changes in two general precipitation weather process in Fushun in March 2015 are analyzed. The results show that： 2 m temperature forecast of EC fine grid there is biased error for a criterion of the forecast of temperature,when a precipitation 2 m dew point temperature and the change of 1 000 hPa wind vector V before and after precipitation,can be used as the main basis of judging advection cooling and non adiabatic cooling. If precipitation after the dew point temperature drop and V from plus to minus,it means cold air intrusion,advection cooling is obvious. If the temperature rises after the precipitation starts and the vector V had no obvious change,and the direction of the vector was north,it is indicated that there is no cold air intrusion,and the non adiabatic cooling is the main.
出处
《安徽农业科学》
CAS
2015年第26期211-212,共2页
Journal of Anhui Agricultural Sciences
关键词
EC细网格
降水
精细化
温度变化
EC fine grid
Precipitation
Refinement
Temperature change
