Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.12.018 |
Implementation of a gust front head collapse scheme in the WRF numerical model | |
Lompar, Milos1; Curic, Mladjen2; Romanic, Djordje3 | |
2018-05-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2018 |
卷号 | 203页码:231-245 |
文章类型 | Article |
语种 | 英语 |
国家 | Serbia; Canada |
英文摘要 | Gust fronts are thunderstorm-related phenomena usually associated with severe winds which are of great importance in theoretical meteorology, weather forecasting, cloud dynamics and precipitation, and wind engineering. An important feature of gust fronts demonstrated through both theoretical and observational studies is the periodic collapse and rebuild of the gust front head. This cyclic behavior of gust fronts results in periodic forcing of vertical velocity ahead of the parent thunderstorm, which consequently influences the storm dynamics and microphysics. This paper introduces the fast gust front pulsation parameterization scheme in the WRF-ARW model (Weather Research and Forecasting-Advanced Research WRF). The influence of this new scheme on model performances is tested through investigation of the characteristics of an idealized supercell cumulonimbus cloud, as well as studying a real case of thunderstorms above the United Arab Emirates. In the ideal case, WRF with the gust front scheme produced more precipitation and showed different time evolution of mixing ratios of cloud water and rain, whereas the mixing ratios of ice and graupel are almost unchanged when compared to the default WRF run without the parameterization of gust front pulsation. The included parameterization did not disturb the general characteristics of thunderstorm cloud, such as the location of updraft and downdrafts, and the overall shape of the cloud. New cloud cells in front of the parent thunderstorm are also evident in both ideal and real cases due to the included forcing of vertical velocity caused by the periodic collapse of the gust front head. Despite some differences between the two WRF simulations and satellite observations, the inclusion of the gust front parameterization scheme produced more cumuliform clouds and seem to match better with real observations. Both WRF simulations gave poor results when it comes to matching the maximum composite radar reflectivity from radar measurement. Similar to the ideal case, WRF model with the gust front scheme gave more precipitation than the default WRF run. In particular, the gust front scheme increased the area characterized with light precipitation and diminished the development of very localized and intense precipitation. |
英文关键词 | Thunderstorms Gust front Cumulus parameterization Downburst Cloud dynamics WRF |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426226400020 |
WOS关键词 | SIMULATED CONVECTIVE STORMS ; THUNDERSTORM OUTFLOW ; GRAVITY CURRENT ; MICROBURST ACTIVITY ; VERTICAL STRUCTURE ; RADAR MEASUREMENT ; DOPPLER RADAR ; WIND SHEARS ; LIFE-CYCLE ; DOWNBURST |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38598 |
专题 | 地球科学 |
作者单位 | 1.Republ Hydrometeorol Serv Serbia, Dept Meteorol, Belgrade, Serbia; 2.Univ Belgrade, Inst Meteorol, Belgrade, Serbia; 3.Western Univ, Wind Engn Energy & Environm WindEEE Res Inst, London, ON, Canada |
推荐引用方式 GB/T 7714 | Lompar, Milos,Curic, Mladjen,Romanic, Djordje. Implementation of a gust front head collapse scheme in the WRF numerical model[J]. ATMOSPHERIC RESEARCH,2018,203:231-245. |
APA | Lompar, Milos,Curic, Mladjen,&Romanic, Djordje.(2018).Implementation of a gust front head collapse scheme in the WRF numerical model.ATMOSPHERIC RESEARCH,203,231-245. |
MLA | Lompar, Milos,et al."Implementation of a gust front head collapse scheme in the WRF numerical model".ATMOSPHERIC RESEARCH 203(2018):231-245. |
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