摘要
利用2009年7月至今渤海浮标站观测资料,分析了渤海大风的特点。结果表明,2009年出现大风、强风57天,2010年为101天,2011年为38天。11月大风、强风日数最多,1月次之;夏季大风、强风日数较少。从风向来看,北风、东北风的大风、强风日数最多。浮标站与沿海两站风场的对比表明,大风日,东北、东风瓦房店站的最大风速更接近浮标站,其他风向旅顺站接近浮标站;强风日,8个风向都是旅顺站相对接近浮标站。从风速差最大值来看,沿海站比浮标站小2～4级。大风日与强风日的对比表明,大风日沿海站的风速更接近浮标站。对极大风速而言,沿海站与浮标站的风速相差较小,旅顺站的风速更接近浮标站。不同的大风过程由于影响系统不同,海陆风向风力会有很大的不同。但无论什么系统造成的大风,最大风速海陆差异都比极大风速海陆差异明显,最大风速海陆差异最小1级,最大5级,而极大风速只差1级左右。当北路、西路冷空气造成大风时,瓦房店站的风速更接近浮标站,最大风速小1～2级,极大风速小1级;当地面低压(包括热带气旋)造成南大风时,3个测站差别不大,最大风速小1级,极大风速相近。
Using the data of buoy site of Bohai Sea in 2009-2011, the feature of gale in Bohai Sea is analyzed. The result shows that the gale and strong wind appear in 2009, and lasted for 57 days, for 101 days in 2010, and for 38 days in 2011. The largest day number of strong wind occurrs in November, the second is January, and the less strong wind day is in summer. From the view of wind direction, the north and north-easterly winds have the most strong wind days. Comparing with winds at the buoy site and two coastal stations, on the gale day, the maximum wind speed of northeast and east winds at Wafangdian sta- tion is more closed to the buoy site, but other wind direction, lfishun station is more closed to buoy site. In the strong wind day, from the places of the eight wind directions at lfishun station are relatively close to the buoy site. From the maximum value of wind speed difference, the coastal station is less than 2~4 grades at buoy site.
出处
《高原气象》
CSCD
北大核心
2013年第1期298-304,共7页
Plateau Meteorology
基金
大连市科技局科技计划项目"大连地区极端气候事件客观预报系统"(2009E11SF230)资助
关键词
大风
海陆风力差异
渤海
Strong wind
Difference between sea and land wind
Bohai Sea
