用单多卜勒雷达确定中尺度气旋环流中心及最大风速半径  被引量:7

DETERMINATION OF MESOCYCLONE CENTER AND RADIUS OF MAXIMUM WIND WITH A SINGLE DOPPLER RADAR

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作  者:马翠平[1] 张培昌[1] 

机构地区:[1]南京气象学院电子信息科学系,南京210044

出  处:《南京气象学院学报》1999年第3期403-407,共5页Journal of Nanjing Institute of Meteorology

摘  要:首先给出具有 Rankine 模式的中尺度气旋的模拟多卜勒径向速度图,然后利用多卜勒雷达观测的径向速度与实际气流间的几何关系,提出一种确定近似轴对称的中尺度气旋中心及最大风速半径的方法。Doppler radial velocity photograph of mesocyclone is simulated with the Rankine Model and a method to determine mesocyclone center position and radius of maximum wind is proposed.In this method,the product of Doppler radar radial velocity ( r) and distance ( D ) between observed point and radar position is taken as a parameter.It can be proved that the mesocyclone center is the middle point of the line from the maximum to the minimum of the parameter ( r ·D ) and the radius of maximum wind is equal to half the distance between the maximum and the minimum ( r ·D ) according to the geometrical relationship of radial velocity and real air flow.The result from model experiment shows that the method is much better than Wood and Browns (1992) method for estimating typhoon center and radius of maximum wind.

关 键 词:雷达测风 多卜勒雷达 中尺度气旋 风速 气旋 

分 类 号:P457.8[天文地球—大气科学及气象学] P412.16

 

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