Lagrangian evaluation of convective shower characteristics in a convection-permitting model

被引：13
|
作者：
Brisson, Erwan [1 ]
Brendel, Christoph [1 ,2 ]
Herzog, Stephan [1 ]
Ahrens, Bodo [1 ]
机构：
[1] Goethe Univ Frankfurt, Inst Atmospher & Environm Sci, Frankfurt, Germany
[2] Deutsch Wetterdienst, Radar Grp, Offenbach, Germany
来源：
METEOROLOGISCHE ZEITSCHRIFT | 2018年 / 27卷 / 01期
关键词：
Convection; Precipitation; Sub-hourly scale; COSMO-CLM; PRECIPITATION; STORMS; SIMULATION;
D O I：
10.1127/metz/2017/0817
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
Convection-permitting models (CPMs) have proven their usefulness in representing precipitation on a sub-daily scale. However, investigations on sub-hourly scales are still lacking, even though these are the scales for which showers exhibit the most variability. A Lagrangian approach is implemented here to evaluate the representation of showers in a CPM, using the limited-area climate model COSMO-CLM. This approach consists of tracking 5-min precipitation fields to retrieve different features of showers (e.g., temporal pattern, horizontal speed, lifetime). In total, 312 cases are simulated at a resolution of 0.01 degrees over Central Germany, and among these cases, 78 are evaluated against a radar dataset. The model is able to represent most observed features for different types of convective cells. In addition, the CPM reproduced well the observed relationship between the precipitation characteristics and temperature indicating that the COSMO-CLM model is sophisticated enough to represent the climatological features of showers.
引用
收藏
页码：59 / 66
页数：8
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