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DOI	10.1029/2019JD031791
	Simulation of Atmospheric Microbursts Using a Numerical Mesoscale Model at High Spatiotemporal Resolution
	Bolgiani P.; Fernández-González S.; Valero F.; Merino A.; García-Ortega E.; Sánchez J.L.; Martín M.L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:4
英文摘要	Atmospheric microbursts are low-level meteorological events that can produce significant damage on the surface and pose a major risk to aircraft flying close to the ground. Studies and ad hoc numerical models have been developed to understand the origin and dynamics of the microburst; nevertheless, there are few researches of the phenomenon using global and mesoscale models. This is mainly due to the limitations in resolution, as microbursts normally span for less than 4 km and 20 min. In this paper, the Weather Research and Forecasting model is used at resolutions of 400 m and 3 min to test if it can properly capture the variables and dynamics of high-reflectivity microbursts. Several microphysics and planetary boundary layer parametrizations are tested to find the best model configuration for the simulation of this kind of episodes. General conditions are evaluated by using thermodynamic diagrams. Surface and vertical wind speed, reflectivity, precipitation, and other variables for each simulated event are compared with observations, and the model's sensitivity to the variables is assessed. The dynamics and evolution of the microburst is evaluated using different plots of a chosen event. The results show that the model is able to reproduce high-reflectivity microbursts in accordance with observations, although there is a tendency to underestimate the intensity of variables, most markedly on the wind vertical velocity. Regarding the microphysics schemes, the Morrison parametrization performs better than the WRF single-moment 6-class scheme. No major differences are found between the Mellor-Yamada-Janjic and the Mellor-Yamada-Nakanishi-Niino planetary boundary layer parametrizations. ©2020. The Authors.
英文关键词	deep convection; downburst; high resolution; high-reflectivity microburst; numerical simulation; WRF
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186151
作者单位	Department of Earth Physics and Astrophysics, Faculty of Physics, Complutense University of Madrid, Madrid, Spain; State Meteorological Agency (AEMET), Santander, Spain; Atmospheric Physics Group, IMA, University of León, León, Spain; Department of Applied Mathematics, Faculty of Computer Engineering, University of Valladolid, Valladolid, Spain; Interdisciplinary Mathematics Institute, Complutense University of Madrid, Madrid, Spain
推荐引用方式 GB/T 7714	Bolgiani P.,Fernández-González S.,Valero F.,et al. Simulation of Atmospheric Microbursts Using a Numerical Mesoscale Model at High Spatiotemporal Resolution[J],2020,125(4).
APA	Bolgiani P..,Fernández-González S..,Valero F..,Merino A..,García-Ortega E..,...&Martín M.L..(2020).Simulation of Atmospheric Microbursts Using a Numerical Mesoscale Model at High Spatiotemporal Resolution.Journal of Geophysical Research: Atmospheres,125(4).
MLA	Bolgiani P.,et al."Simulation of Atmospheric Microbursts Using a Numerical Mesoscale Model at High Spatiotemporal Resolution".Journal of Geophysical Research: Atmospheres 125.4(2020).