双基地雷达合成风场仿真与莫兰蒂台风的风场试验

双(多)基地多普勒天气雷达适于构建局域探测网,对于需进行气象保障的局部区域的对流性降水探测尤为重要。利用双(多)基地多普勒雷达网监测其强降水以及风场结构,通过风场反演了解其风场结构,能够更好地认识中小尺度天气的演变机理,改进短临预报。研究了双基地雷达的合成风场反演方法,通过仿真试验,可获得大气的辐合辐散、旋转以及上升或下沉等三维风场特征。借助福建厦门和泉州的两部多普勒天气雷达的实测资料,构成仿真的双基地雷达探测,分析了"莫兰蒂"台风的降水强度与径向风场回波特征,并反演了二维和三维的合成风场。结果表明,双基地雷达的合成风场方法,可以有效地反演台风的二维和三维风场,为监测台风的精细结构和演变提供了丰富信息。

Simulation of the wind field synthetic base on bistatic radar and wind field experiment of

Bistatic Doppler weather radar is suitable for constructing the local detection network, monitoring heavy rainfall and wind field structure. The synthetic wind field inversion method of bistatic Doppler radar is studied to retrieve three-dimensional atmospheric wind field through the simulation experiment. Convergence, divergence, circulation and rising and sinking of wind field, which areScharacteristics of real atmospheric, can also be obtained. The bistatic Doppler radar is established with the measured data from two Doppler weather radar in Xiamen and Quanzhou of Fujian province, and analyzed the "Meranti bistatic Doppler radar can effectively retrieval the two-dimensional and three-dimensional wind field of typhoon, which provided abundant information for monitoring the structure and evolution of the fine wind field.