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本文研究了地形追随坐标系下的二阶湿位涡 1275-1288. DOI: 10. 1002/qj. 636.
在改进降水预报中的初步应用情况, 主要是针对 Monache L D, Nipen T, Liu Y, et al, 2011. Kalman filter and analog
schemes to postprocess numerical weather predictions[J]. Monthly
GFS 模式预报场的改进和评估, 后续在历史数据库
Weather Review, 139: 3554-3570. DOI: 10. 1175/2011MWR3
允许的情况下还可将其应用于高分辨率模式(如
653. 1.
WRF)降水预报的订正。根据上述应用情况, 例如
Nastrom G D, Fritts D C, 1992. Sources of mesoscale variability of
图 10(e), 发现相似性方法对模式的过度预报改进 gravity waves. Part Ⅰ : Topographic excitation[J]. Atmospheric
效果更佳, 但在部分非降水时刻可能存在空报,但 Science, 49(2): 101-110.
在部分非降水时刻依然存在空报情况。特别需要 Ran L K, Li N, 2014. PV-based wave-activity density and its applica‐
指出的是, 相似性算法的应用效果与相似因子的选 tion to tracing heavy precipitation. Meteorology and Atmospheric
Physics[J]. Meteorology and Atmospheric Physics, 123: 33-50.
取和样本库有密切关系, 本文是以二阶湿位涡单因
DOI: 10. 1007/s00703-013-0297-x.
子作为相似因子, 后续工作还可纳入更多因子定义
毕宝贵, 刘月巍, 李泽椿, 等, 2006. 秦岭大巴山地形对陕南强降水
相似算子, 如对流涡度矢量、 垂直螺旋度等, 从而 的影响研究[J]. 高原气象, 25(3): 485-494. Bi B G, Liu Y
更全面挖掘大气的相似性特征, 优化空报问题; 另 W, Li Z C, et al, 2006. Study on influence of the mechanical
外, 还可进一步增加样本数量, 从而涵盖更多降水 forcing of mesoscale topography on the extremely heavy rainfall
in Southern Shaanxi on 8~9 June 2002[J]. Plateau Meteorology,
类型和降水的演变特征, 进一步提高预报技巧。
25(3): 485-494.
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