Preprints
https://doi.org/10.5194/amt-2021-42
https://doi.org/10.5194/amt-2021-42

  04 Mar 2021

04 Mar 2021

Review status: this preprint is currently under review for the journal AMT.

Evaluation and Impact Factors of Doppler Wind Lidar during Super Typhoon Lekima (2019)

Xu Wang1, Shengming Tang2, Yun Guo1, Jie Tang2, and Shuai Zhang2 Xu Wang et al.
  • 1State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, 400074, China
  • 2Shanghai Typhoon Institute of China Meteorological Administration, Shanghai 200030, China

Abstract. Doppler wind lidar (DWL) has been shown to obtain fairly accurate wind speeds in normal wind conditions. However, the evaluation of DWL winds under typhoon conditions is less common. This study evaluated the accuracy of wind data measured by two types of DWLs (WindPrint S4000 and WindCube V2), and investigated the impact of factors (e.g., precipitation and humidity) on the DWL-observed wind speed and direction. Data were collected from joint observations in Baoshan, Zhoushan and Taizhou (China) by the Shanghai Typhoon Institute during the passage of Super Typhoon Lekima in 2019. The DWL observations were compared with measured data from balloon-borne radiosonde released at the same location. The results showed that the 1-min average wind speed and direction of WindPrint S4000 were more consistent with the instantaneous observation data of the sounding balloon than those of WindCube V2. The applicability of DWL was poor when the precipitation intensity was larger than 50 mm · h−1. The DWL wind speed bias significantly increased when the relative humidity exceeded 85 %. When the drift distance of the sounding balloon (ldrift) was less than 1 km, the DWL wind speed bias decreased with an increase of ldrift, whereas it increased with an increase of ldrift when the drift exceeded 1.5 km. Within a radius of 700 km, the root mean square of wind speeds between DWL and sounding balloon measurements showed a trend of increasing as the distance from the typhoon center decreased.

Xu Wang et al.

Status: open (extended)

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  • RC1: 'Comment on amt-2021-42', Anonymous Referee #1, 18 Apr 2021 reply

Xu Wang et al.

Xu Wang et al.

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Short summary
Doppler wind lidar (DWL) has been shown to obtain fairly accurate wind speeds in normal wind conditions. However, the evaluation of DWL winds under typhoon conditions is less common. This study evaluated the accuracy of wind data and investigated the impact of factors (e.g., precipitation and humidity) on the DWL-observed winds at three locations in China during Super Typhoon Lekima (2019). This study is expected to provide support for the use of DWL in tropical cyclone observations.