Preprints
https://doi.org/10.5194/egusphere-2024-609
https://doi.org/10.5194/egusphere-2024-609
22 Mar 2024
 | 22 Mar 2024
Status: this preprint is open for discussion.

Study on the influence of topography on wind shear-numerical simulation based on WRF-CALMET

Xingyu Wang, Yuhong Lei, Baolong Shi, Zhiyi Wang, Xu Li, and Jinyan Wang

Abstract. This study focuses on the critical issue of low-altitude wind shear, vital for aircraft safety during takeoff and landing. Using the WRF-CALMET model, we assess the impact of topography on low-level wind shear at Zhongchuan Airport. CALMET outperforms WRF, showing improved simulation accuracy. CALMET's simulation highlights diurnal variations in vertical wind shear, especially pronounced from 13:00 to 24:00. Notably, CALMET indicates 1–2 hazard levels higher wind shear for aircraft operations compared to WRF in a significant area. Terrain sensitivity experiments reveal CALMET's responsiveness to terrain changes during high wind shear periods, with reduced impact at higher altitudes. CALMET's incorporation of kinematic terrain influences, blocking effects, slope flow, and strengthened diversion of near-surface airflow on complex terrain contribute to these findings. This study confirms the efficacy of CALMET in simulating low-altitude wind shear, emphasizing its superiority in capturing terrain influences and reducing the aviation safety threat posed by low-altitude wind shear.

Xingyu Wang, Yuhong Lei, Baolong Shi, Zhiyi Wang, Xu Li, and Jinyan Wang

Status: open (until 13 May 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-609', Anonymous Referee #1, 06 Apr 2024 reply
    • AC1: 'Reply on RC1', Xingyu Wang, 09 Apr 2024 reply
      • RC2: 'Reply on AC1', Anonymous Referee #1, 09 Apr 2024 reply
        • AC2: 'Reply on RC2', Xingyu Wang, 10 Apr 2024 reply
Xingyu Wang, Yuhong Lei, Baolong Shi, Zhiyi Wang, Xu Li, and Jinyan Wang
Xingyu Wang, Yuhong Lei, Baolong Shi, Zhiyi Wang, Xu Li, and Jinyan Wang

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Short summary
This study, employing the WRF-CALMET model, investigates the impact of terrain near Zhongchuan Airport on low-level wind shear. CALMET demonstrates higher simulation accuracy than WRF. Terrain sensitivity experiments emphasize CALMET's responsiveness to terrain changes during high wind speed periods. The research validates CALMET's effectiveness in simulating low-altitude wind shear, highlighting its superior capability in capturing terrain influences and mitigating aviation safety concerns.