Distribution Characteristics of the 16-azimuth Wind Speed Extreme Values in Zhuhai
To obtain quantitative description of the extreme high wind conditions in Zhuhai more accu-rately,this paper simulated the extreme values of direction-free wind speeds and wind speeds at all 16 azi-muths using the daily maximum 10-min wind observations in the city from 2004 to 2022,by means of the Generalized Pareto Distribution(GPD)method based on POT.The results are shown as follows.The aver-age wind speed threshold is relatively large in the east of Xiangzhou District,the city's island,Jinwan Dis-trict and the west of Gaolan Port.The return level of extreme high wind is also the highest,with 50-and 100-year return levels being at or above 30 and 38 m/s,respectively.Among them,the west of Gaolan Port and the island not only have more average high winds,but also have a greater probability of record-breaking extreme high winds.In most areas,the extreme value indicators are large,and the extreme high wind events are nearly independent.Extreme high winds in the north of Doumen District,Gaolan Port and the east of Xiangzhou tended to increase significantly in recent years.The largest extreme high winds at most stations of Zhuhai are from the directions of NE,ENE and NNE.In addition to being affected by the weather system,the extreme high wind is also subjected to the impact of the terrain.
万方数据
维普
