闽东北沿海港湾岛屿测站风分布特征及预报指标站的选取

Wind distribution characteristics and the selection of forecast indicator station in the northeast coastal islands of Fujian

基于2011—2013年福建省宁德市港湾岛屿自动站观测的风的资料,统计分析3 a港湾岛屿风力的时空分布特征,结果表明:港湾岛屿各站的空间分布极为不均,具有明显的区域性差异,局地性特征突出。测站的主导风向以东北风为主,各地风向差异明显。大风风速的季节变化相对来说比较平缓,季节间的差异不大。大风风向的季节变化,冬、秋、春季盛行东北风,夏季则以西南风为主导。此外,通过对资料的完整性、可用性、服务的重要性、站点的地理分布和相关性等因素深入分析,对比论证自动站大风探测资料的代表性和适用性,确定宁德市港湾岛屿大风预报区域自动站的24个代表站,作为预报风力的指标站,将自动站纳入天气预报指标体系,以便对港湾岛屿风力预报进行精细化研究。

Based on wind data from automatic station at Ningde harbour Island during 2011-2013, the temporal and spatial distribution characteristics of wind power are analyzed statistically. The results shows that the spatial distribution of each station is very uneven, with obvious regional differences, and the local characteristics are prominent. The main wind direction at the station is dominated by northeasterly wind, with an obvious differences of wind direction at different stations. Seasonal variation of wind speed is relatively gentle, and with an unremarkable seasonal difference. As for seasonal variation of wind direction, the prevailing wind direction in winter, autumn and spring is north-easterly, while in summer is dominated by the southwest wind. Through the in-depth analysis of factors such as the integrity and availability of the data, importance of service, the geographical distribution and the relevance of sites, by comparing the representative and applicability of the automatic station wind detection data, 24 representative station of the automatic station of the wind forecast area at Ningde harbor island is determined as the indicator station for forecasting the wind power of harbor island. The automatic station will be integrated into the weather forecasting index system, so as to fine-tune the harbor island wind forecast.