the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Improving boundary layer flow simulations over complex terrain by applying a forest parameterization in WRF
Abstract. The impact of a forest parameterization on the simulation of boundary layer flows over complex terrain is investigated. Short- and long-term simulations are run for 12 hours and 1.5 months, respectively, with and without forest parameterization and the results are compared to lidar and meteorological tower observations. The test cases are based on the Perdigao 2017 campaign. Short-term simulations focus on low-level jet events over the double-ridge, while long-term simulations cover the whole intensive observation period of the campaign. Simulations without forest parameterization do not reproduce the interaction of the boundary layer flow with the double ridge satisfactorily. Surface winds are overestimated and flow separation and recirculation zones are not or only partly simulated. The additional drag of the forest parameterization considerably improves the agreement of simulated and observed wind speed and potential temperature by reducing the positive wind speed bias and increasing the correlation. The positive effect of the forest parameterization on the boundary layer flow is visible both in the short- and long-term simulations.
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Interactive discussion
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SC1: 'WRF configuration', Alfredo Peña, 13 Nov 2019
- AC1: 'WRF namelists', Johannes Wagner, 03 Dec 2019
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RC1: 'Exciting and worth publishing topic; with more details and analysis are needed', Anonymous Referee #1, 18 Dec 2019
- AC2: 'Reply to comments', Johannes Wagner, 23 Apr 2020
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RC2: 'Review Wagner et al., 2019', Anonymous Referee #2, 20 Jan 2020
- AC3: 'Reply to comments', Johannes Wagner, 23 Apr 2020
Interactive discussion
-
SC1: 'WRF configuration', Alfredo Peña, 13 Nov 2019
- AC1: 'WRF namelists', Johannes Wagner, 03 Dec 2019
-
RC1: 'Exciting and worth publishing topic; with more details and analysis are needed', Anonymous Referee #1, 18 Dec 2019
- AC2: 'Reply to comments', Johannes Wagner, 23 Apr 2020
-
RC2: 'Review Wagner et al., 2019', Anonymous Referee #2, 20 Jan 2020
- AC3: 'Reply to comments', Johannes Wagner, 23 Apr 2020
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Cited
4 citations as recorded by crossref.
- Recent developments in high-resolution wind field modeling in complex terrain for dispersion simulations using GRAMM-SCI D. Oettl & R. Reifeltshammer 10.1007/s11869-023-01403-3
- Multi-lidar wind resource mapping in complex terrain R. Menke et al. 10.5194/wes-5-1059-2020
- The Performance of GRAMM-SCI and WRF in Simulating the Surface-Energy Budget and Thermally Driven Winds in an Alpine Valley G. Simonet et al. 10.1007/s10546-023-00835-9
- Evaluation of a forest parameterization to improve boundary layer flow simulations over complex terrain. A case study using WRF-LES V4.0.1 J. Quimbayo-Duarte et al. 10.5194/gmd-15-5195-2022