风切变对飞行的影响及其预报时效分析  

Impact of Wind Shear upon Aviation and Its Predictable Scale

作　　者：李秀连[1] 付强[1] 王科[1] 丁叶风[1] 

机构地区：[1]民航华北空管局气象中心,北京100621

出　　处：《气象科技》2010年第2期170-174,共5页Meteorological Science and Technology

摘　　要：利用NCEP再分析资料和AMDAR资料,对2008年11月1日首都机场冷锋过境前后风切变现象及其可预报时效进行分析。分析认为:在冷锋过境前后,首都机场存在多种形式的风切变,有高空槽前后的水平风切变、高层和中层急流轴引起的水平风切变、冷锋前逆温层顶上下的水平风切变和地面锋面过境时跑道面上的水平和侧风切变。对各种风切变的可预报时效进行了分析。The wind shear caused by the passing of a cold-front through the Capital Airport on 11 November 2008 and its predictable time scale are analyzed by means of the NCEP re-analysis data and AMDAR data.It is concluded that while the cold-front passing,there existed several forms of wind shear,including the horizontal wind shear related to an upper-level trough;the vertical wind shear caused by the upper-level and mid-level jet axes,temperature inversion before the cold-front,as well as the horizontal-wind and crosswind shear on the runway surface while the surface-front passing.The predictable time scales of these forms of wind shear are also discussed.

关 键 词：风切变 临近预报 AMDAR资料 逆温 

分 类 号：P45[天文地球—大气科学及气象学]