Precipitation Modeling and Quantitative Analysis

XVI, 240 p.online resource

The Structure and Evolution of Sea Breezes During Qingdao Olympics Sailing Test Event in 2006

Using data from automatic surface weather stations, buoys, lidar and Doppler, the three-dimensional structure and other characteristics of the sea breezes near the sailing sites of the Good Luck Beijing- 2006 Qingdao International Regatta from 18 to 31 of August 2006 are analyzed. The sea breezes are categorized into two types as being under the control of or at the edge of the subtropical high. The influence of the large-scale subtropical high on the local sea breezes is investigated. Results show that excluding rainy days and days with typhoon, the sea breezes occur nearly everyday during this period. When Qingdao is located at the edge of a subtropical high, the sea breeze usually starts at around 1100 to 1300 LST and lasts about 6 hours. When Qingdao is under the control of a subtropical high, the sea breeze usually begins later between 1300 and 1500 LST. Under the control of subtropical high, the wind speed near the sailing sites is very weak and is usually less than 2.5 m s-1 throughout the day, and the wind direction is variable. The direction of the sea breeze is easterly to southeasterly. When Qingdao is at the edge of the subtropical high, the sea breezes are stronger and usually begin earlier. The wind speed is around 3- 4 m s-1 when the sea breeze forms, it is usually the strongest at this formation stage. In this case, the direction of the sea breeze tends to be southeasterly. If the sea breezes are stronger, they tend to be more perpendicular to coastline. Otherwise, they are closer to direction of prevailing winds. Wind speed usually decreases quickly at the decaying stage of sea breeze. The stronger the sea breeze, the faster the wind speed drops. In addition to the land-se