Characteristic and Influence Factors of Hail Duration in Northeast Qinghai Province during 1980-2020
Based on the high and ground observation data from 11 ground observation stations in northeastern Qinghai province from 1980 to 2020,the spatial and temporal distribution of hail duration and its influence factors were analyzed.The results show that the duration of hail was significantly positively correlated with altitude,the maximum value of average hail duration was 9 minutes in Hualong county,and the minimum value was 4.89 minutes in Tongren county in recent 41 years.The frequency was the highest when the hail duration was less than 9 minutes,accounting for 73.55%of the total observed times.The monthly variation of hail duration was obvious,the daily variation showed a single peak type,the peak value appeared at 16:00,accounting for 19.12%of the total cumulative of hail duration.The mean annual hail duration decreased by 0.9 min/10 a,the decrease of hail duration was related to the increase of average temperature,the rise of 0℃and-20℃layer height,the decrease of daily temperature range and relative humidity.
hailspatial and temporal distributioninfluence factor
国家科技期刊平台
NSTL
万方数据
