Dzebre Denis E K, Acheampong Akwasi A, Ampofo Joshua, Adaramola Muyiwa S
Faculty of Environmental Sciences and Natural Resources, Norwegian University of Life Sciences, Ås, Norway.
Department of Mechanical Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
Heliyon. 2019 Mar 27;5(3):e01385. doi: 10.1016/j.heliyon.2019.e01385. eCollection 2019 Mar.
Over the years, the Weather Research and Forecasting Model (WRF) has been gaining popularity as a low-cost alternative source of data for wind resource assessments. This paper investigates the impact of selected time control, and nudging options on wind simulations in WRF. We conducted 15 numerical experiments, combining 5 simulation run-times and 3 options for disabling nudging in the Planetary Boundary Layer (PBL) in WRF. Hourly wind speed and direction predictions were compared with actual measurements at 40 m, 50 m and 60 m a.g.l. From our results, we recommend that, for optimum performance, the method of disabling nudging in the PBL should be chosen with simulation run times in mind. For wind simulations in our study area, up to 2 days run-times with nudging disabled below 1600 m in model configurations gives the best wind speed predictions. However, disabling nudging below the model-calculated PBL height offers more consistent results and produces relatively less prediction error with longer run times.
多年来，天气研究和预报模型（WRF）作为一种低成本的风资源评估数据替代来源，越来越受到欢迎。本文研究了选定的时间控制和 nudging 选项对 WRF 中风模拟的影响。我们进行了 15 次数值实验，结合了 5 种模拟运行时间和 3 种在 WRF 的行星边界层（PBL）中禁用 nudging 的选项。将每小时的风速和风向预测与海拔 40 米、50 米和 60 米处的实际测量值进行了比较。根据我们的结果，我们建议，为了获得最佳性能，应在考虑模拟运行时间的情况下选择在 PBL 中禁用 nudging 的方法。对于我们研究区域的风模拟，在模型配置中，在 1600 米以下禁用 nudging 并运行长达 2 天的时间能给出最佳的风速预测。然而，在模型计算的 PBL 高度以下禁用 nudging 能提供更一致的结果，并且在运行时间较长时产生的预测误差相对较小。
