The study looked at how wind patterns change throughout the day near Hainan Island. By using data from three towers with special wind sensors, the researchers found that wind speeds were highest at night and lowest at noon. The direction of the wind also shifted, with more northerly winds at night and easterly winds at noon. These changes are likely caused by differences in temperature between the land and sea. The researchers also discovered that wind speeds above 50 meters are less affected by the terrain below. Overall, the study shows that wind patterns near Hainan Island follow a specific pattern throughout the day, influenced by the surrounding land and sea.