19A.1 ASSIMILATION OF RADAR REFLECTIVITY DATA IN THE MET OFFICE CONVECTIVE-SCALE FORECAST SYSTEM
19A.1 ASSIMILATION OF RADAR REFLECTIVITY DATA IN THE MET OFFICE CONVECTIVE-SCALE FORECAST SYSTEM
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19A.1 气象局对流规模预报系统中雷达反射率数据的同化
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
S. Ballard
中科院分区：
文献类型：
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作者：
S. Ballard
一些业务中心目前正在定期运行对流允许大气模型，用于区域数值天气预报。英国气象局目前正在运行统一模式（UM; Davies et al. 2005）的可变分辨率版本，即UKV，其在英国上空的外部分辨率为4 km，内部分辨率为1.5 km。大气模式的高水平分辨率，以及相关的高分辨率地形表示和改进的物理参数化，使模式能够产生具有高度真实性的中尺度和对流特征。临近预报应用，即0 - 6小时范围内的预报，面临的主要挑战是通过最佳应用数据同化，以提高准确性，支持更好的现实性。
A number of operational centres are now routinely running convection permitting atmospheric models for regional Numerical Weather Prediction. The Met Office is currently running a variable resolution version of the Unified Model (UM; Davies et al. 2005), the UKV, with outer resolution 4km and inner resolution of 1.5km over the United Kingdom. The high horizontal resolution of the atmospheric model, and associated high resolution representation of orography, and improved physical parameterizations, allows the model to produce mesoscale and convective features with a high degree of realism. The major challenge for the nowcasting application, i.e. forecasting in the range 0 – 6 hours, is to support the improved realism with improved accuracy by the optimum application of data assimilation.