Research on the veering wind characteristics in typical suburban terrain based on lidar field measurements

Based on the Doppler lidar field measurement results of the atmospheric boundary layer (ABL) lasting for 25 months in a typical suburban terrain where the Shenzhen Meteorological Gradient Tower is located, the veering wind characteristics of different wind fields types in ABL within an altitude range of approximately 800 m were systematically investigated. Results show that: 1) The veering wind of the monsoon was significantly influenced by the topographic conditions, and the total wind veering angles were about-13 degrees similar to- 45 degrees. By defining the mountain influence factor M, the influence ranges of Yangtai Mountain on the east and Fenghuang Mountain on the west on the monsoon wind direction profile were detected to be within 60 degrees similar to 120 degrees and 240 degrees similar to 345 degrees, respectively. 2) The characteristics of veering wind were influenced by different types of wind climates (monsoon and typhoon), exhibiting different distribution characteristics with altitude, wind speed and wind direction. 3) The Ekman spiral and inverse Ekman spiral phenomena in the monsoon group exhibited obvious time variation characteristic and were influenced by atmospheric stability. 4) A new mathematical model for describing the monsoon wind direction characteristics suitable for flat terrain was proposed, which would be useful for the wind resistance design for super high-rise building structures.