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中国农学通报 ›› 2015, Vol. 31 ›› Issue (8): 187-198.doi: 10.11924/j.issn.1000-6850.2014-2388

所属专题: 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

雷达资料同化在安徽暴雨个例中的应用

陈光舟1,娄珊珊1,袁 松1,李 昕2   

  1. (1安徽省气象台,合肥 230031;2南京大学大气科学学院,南京 210093)
  • 收稿日期:2014-09-01 修回日期:2014-11-19 接受日期:2015-01-08 出版日期:2015-04-07 发布日期:2015-04-07
  • 通讯作者: 陈光舟
  • 基金资助:
    安徽省气象科研面上项目“WRF模式的区域集合研究与应用”(KM201301);淮河流域气象开放研究基金“资料同化技术在淮河流域暴雨预报中的应用研究”(HRM201208);公益性行业(气象)科研专项经费子项目“大别山中尺度地形下垫面下强对流的生消与发展”(GYHY201006004-4)。

Application of Doppler Radar Data Assimilation in A Local Rainstorm Case in Anhui Province

Chen Guangzhou1, Lou Shanshan1, Yuan Song1, Li Xin2   

  1. (1Anhui Meteorological Observatory, Hefei 230031;2School of Atmospheric Science, Nanjing University, Nanjing 210093)
  • Received:2014-09-01 Revised:2014-11-19 Accepted:2015-01-08 Online:2015-04-07 Published:2015-04-07

摘要: 为了研究雷达资料同化对安徽暴雨预报的作用,使用WRFV3.4模式对2012年7月12日—14日安徽的一次暴雨个例,选取Eta微物理方案和GD积云参数化方案组合,利用WRFVAR3.4三维变分同化系统进行了直接循环同化雷达径向风资料。将同化试验和控制试验模拟的降水与实况比较,结果表明,同化了雷达径向风后在一定时间范围内能明显地提高降水预报,同化雷达资料后的前12 h内降水的同化试验较控制试验有一定的改进,特别是前6 h,可以看到,在小雨、中雨及暴雨量级上,都较控制试验有明显改进,在加入雷达径向风资料同化后,降水区的风场辐合特征更为明显,风速也有一定增强,降水强度和中心更接近实际值。在同化雷达资料后的后12 h,可以发现同化试验的优势逐渐不明显。

关键词: 日光温室, 日光温室, 冬季小气候, BP神经网络, 模拟

Abstract: In order to study the radar data assimilation effect on Anhui rainstorm forecast, the author used WRFV3.4 mode to simulate a heavy rainfall from July 12 to July 14, 2012 in Anhui Province, selected the combination of Eta microphysical scheme and GD cumulus parameterization scheme, and used the three-dimensional variational assimilation system of WRFVAR3.4 to carry out the direct assimilation test with radar radial velocity data. Comparing precipitation of assimilation experiment and control experiment with actual rainfall, it was found that assimilation radar radial velocity could significantly improve the precipitation forecast in a certain period. Especially in the earlier 6 h, assimilation experiment had significant improvement than control experiment in three grades which were light rain, moderate rain and heavy rain, and after joining Doppler radar data assimilation, wind field convergence characteristics in rainfall area was more apparent, wind speed also had certain enhancement, rainfall intensity and center were closer to actual values. During 12 h after assimilation radar radial velocity data, it was found that the advantage of assimilation test was not obvious gradually.