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Zhiyong Meng and Fuqing Zhang

heterogeneous distribution, and the related determination of the radius of influence. Radar radial velocity has been shown to have more of a positive impact than reflectivity. Some special or synthetic observations such as vortex position/intensity/size have also been found to have apparent positive effects on the performance of the LAM EnKF. The presence of model errors can often result in a large bias of the ensemble mean and too little spread, which can ultimately cause the ensemble forecast to fail

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