摘要
针对台风数值预报中由于采用对称模型而导致预报误差的现实,通过引入非对称分布的台风最大风速、最大风速半径等因子,在得到台风报告中7级风和10级风的半径的基础上,利用最佳权系数方案来得到非对称的台风外围风速分布因子,从而对Chan and Williams 1987年提出的切向风廓线方案进行改造,进而得到了台风海面非对称风场的计算式。检验表明,该方法能够描述台风海面风场的非对称分布,具有较好的应用前景。
In this paper, we first adopt the asymmetric maximum wind velocity and radius of the maximum wind velocity formulas, and then use the optimal coefficient scheme to get the parameter which controls the distribution of the typhoon wind outer structure with the consideration of real 30 knots and 50 knots wind radius. In addition, we improve the tangential wind profile scheme of typhoon brought forward by Chan and Williams (1987) and then typhoon ocean surface asymmetric wind speed is shown. The experiment shows that this method can describe the asymmetry distribution of wind speed in typhoon over the ocean surface and would have a broad prospect for operational practice.
出处
《热带气象学报》
CSCD
北大核心
2004年第2期129-136,共8页
Journal of Tropical Meteorology
基金
国家自然科学基金资助项目(40175012)资助
关键词
台风
最大风速半径
风向内偏角
海面风场
typhoon
maximum wind velocity radius
inner deflection angle of wind direction
wind speed of ocean surface
