新一代多普勒天气雷达在林火监测中的应用

对发生在浙江省温州和丽水地区6起森林火灾引起的雷达回波进行分析,发现新一代多普勒天气雷达的基本反射率、径向速度等产品对火灾烟气有明显的反映,雷达能对不同过火面积的火灾进行观测,火灾引起的回波具有水平尺度小、回波顶高度低、强度强等与地物回波相类似的特点,径向速度图上一般有辐散速度对.受较小风力和地形的影响,发生在大陆山区森林火灾的回波特征较海岛的更为显著.

Forest Fires Observations by Using the New Doppler Weather Radar

In this paper,radar echoes caused by six cases of forest fires were anylized in Wenzhou and Lishui areas of Zhejiang province.The result revealed that the new doppler radar has obvious reflection to the smoke plume by forest fires,with the radar products of base reflectivity,radial velocity and so on.The doppler radarcould observations different overzealous areas of fires.The echo caused by forest fires have the same characteristics with clutter echoes,include small horizontal scale,low echo height and high echo intensity.Velocity couplet almost always presents in the radial velocity charts.Affected by the low wind and terrain,the echoes characteristics of forest fires occurred in the mainland have stronger radar signals than in the islands.