环渤海区域强风过程的气候特征模拟分析

采用欧洲中期天气预报中心ERA-interim再分析资料驱动WRF模式，对环渤海区域1981—2012年123次强风过程进行了模拟，并对不同天气系统形势下环渤海区域强风过程的气候特征进行了分析，得到以下结论：1）WRF数值模式可以较好地模拟环渤海区域强风过程的发展演变特征。2）西北路冷锋过程引起的环渤海区域强风强度较其他过程偏强，强风集中在辽东半岛西部、渤海海峡和山东半岛东部。黄河气旋引起的强风过程与冷锋相比，分布特征有着明显的不同，强风主要集中在山东半岛东部及黄海海域，渤海海域的强风相对偏弱。3）强风过程存在明显的季节变化，秋冬季强风持续时间长，风速大，春季次之，夏季最弱。4）强风过程在渤海海域的最大风速呈增加趋势，而在渤海海峡以东海域和山东半岛南部呈减小趋势。

SimulationandanalysisoftheclimatecharacteristicsofstrongwindprocessesovertheBohaiSearegion

One hundred and twenty three strong wind processes over the Bohai Sea region from 1981 to 2012 are simulated using the WRF model by ERA-interim, and climate characteristics of different weather situations are analyzed.The results are as follows. 1) The WRF model can well simulate the evolution characteristics of the strong wind processes over the Bohai Sea region. 2) The intensity of strong wind processes over the Bohai Sea region caused by northwestern cold front are stronger than that by other processes.The strong wind processes are mainly over the western sea area of Liaodong Peninsula, the Bohai Strait and the eastern sea area of Shandong Peninsula. Compared with strong wind processes caused by the cold front, the distribution characteristics of those caused by the Yellow River cyclone are obviously different, which are mainly over the eastern sea area of Shandong Peninsula and Yellow Sea areas. Strong wind processes are relatively weak overt he Bohai Sea. 3) There is obvious seasonal variation in strong wind processes. The duration is long and the wind speed is high in autumn and winter, followed by those in spring, and those in summer are the least. 4) The maximum wind speed of strong wind process is gradually increasing over the Bohai Sea and decreasing over the southern sea area of Shandong Peninsula and to the east of the Bohai Strait.