摘要
发生在机场周围的下击暴流,对飞机起降安全构成重大威胁。多普勒天气雷达以其高时空分辨率成为监测和预警下击暴流的有力工具。对国内外利用多普勒天气雷达研究下击暴流的现状进行了综述,包括下击暴流的基本概念、回波特征以及目前国内外主要算法:基于切变段法、图像处理法和线性判别分析法。最后对多普勒天气雷达识别和预警下击暴流的研究现状进行了总结,为国内开展这方面研究提供参考和借鉴。
The destructive gusts and wind shear caused by downbursts are great threats to human＇ s daily life and the taking off or landing of planes. Doppler radar plays important roles on monitoring and predicting downbursts for its high temporal and spatial resolution. The current status of researches on downburst monitoring with Doppler radar both at home and abroad is summarized and the prospects are discussed. Introduction is also made to tl^e basic concepts and echo features of downbursts, as well as the main algorithms used presently, including the shear-segment method, image-processing method, and linear discriminant analysis.
出处
《气象科技》
2007年第5期631-636,共6页
Meteorological Science and Technology
