Numerical Simulations of the 1 May 2012 Deep Convection Event over Cuba: Sensitivity to Cumulus and Microphysical Schemes in a High-Resolution Model
Numerical Simulations of the 1 May 2012 Deep Convection Event over Cuba: Sensitivity to Cumulus and Microphysical Schemes in a High-Resolution Model
复制标题
2012 年 5 月 1 日古巴上空深对流事件的数值模拟：高分辨率模型中对积云和微物理方案的敏感性
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
M. D. Mesquita
中科院分区：
文献类型：
--
作者：
Yandy G. Mayor;M. D. Mesquita
本文评估了积云和微物理方案的敏感性，代表在数值模拟的天气研究和预报模型，在表征深对流事件在2012年5月1日在古巴岛。为此，30个实验相结合的积云和6个微物理方案，除了两个实验中，积云参数化被关闭，进行了测试，以选择更准确地代表事件降水的组合。ERA Interim用作缩减程序的横向边界条件数据。结果表明，对流方案比微物理方案更重要，以确定在高分辨率域模拟的降水区。此外，虽然一个积云方案捕捉整体空间对流结构的事件比其他更准确，它未能捕捉到的降水强度。这种明显的差异导致敏感性的验证方法用于排名的方案组合。这种敏感性也观察到参数化和显式积云形成之间的比较时，凯恩-弗里奇计划使用。当Grell-Freitas积云方案在1 km网格间距激活时，也发现了附加值的损失。
This paper evaluates the sensitivity to cumulus and microphysics schemes, as represented in numerical simulations of the Weather Research and Forecasting model, in characterizing a deep convection event over the Cuban island on 1 May 2012. To this end, 30 experiments combining five cumulus and six microphysics schemes, in addition to two experiments in which the cumulus parameterization was turned off, are tested in order to choose the combination that represents the event precipitation more accurately. ERA Interim is used as lateral boundary condition data for the downscaling procedure. Results show that convective schemes are more important than microphysics schemes for determining the precipitation areas within a high-resolution domain simulation. Also, while one cumulus scheme captures the overall spatial convective structure of the event more accurately than others, it fails to capture the precipitation intensity. This apparent discrepancy leads to sensitivity related to the verification method used to rank the scheme combinations. This sensitivity is also observed in a comparison between parameterized and explicit cumulus formation when the Kain-Fritsch scheme was used. A loss of added value is also found when the Grell-Freitas cumulus scheme was activated at 1 km grid spacing.